Certified Elevator Technician (CET) — Questions and Answers

Question 1: What is the significance of the 'T1/T2 ratio' in traction elevator design?

It defines motor torque to brake torque ratio
It describes the car-to-counterweight weight ratio
It is the ratio of rope tension on the load side to the slack side, determining traction capacity (Correct answer)
It specifies the ratio of up-travel to down-travel speed

Correct answer: It is the ratio of rope tension on the load side to the slack side, determining traction capacity

The T1/T2 ratio compares the heavy (load) side tension to the light (counterweight) side tension and must not exceed the traction capacity of the sheave-rope system.

Question 2: Which type of hoist rope construction is most commonly used in modern traction elevators?

8x19 Seale pattern
6x19 independent wire rope core (IWRC) (Correct answer)
4x36 Warrington
6x7 fiber core

Correct answer: 6x19 independent wire rope core (IWRC)

6x19 IWRC ropes are standard because they offer a good balance of flexibility, strength, and fatigue resistance for elevator service.

Question 3: A door operator motor that runs continuously but the door does not move is MOST likely caused by:

An open interlock circuit
A failed door contact
A broken drive belt or chain (Correct answer)
A faulty controller relay

Correct answer: A broken drive belt or chain

If the motor runs but the door doesn't move, the mechanical link between the motor and door panel — such as a belt or chain — is likely broken.

Question 4: What is the purpose of a 'final limit switch' at the terminal landings of an elevator?

Slows the car to leveling speed before reaching the terminal floor
Cuts power to the motor and brake if the car travels past the normal stopping zone (Correct answer)
Provides position data to the dispatcher for terminal floor assignments
Signals the controller to switch from high to low speed

Correct answer: Cuts power to the motor and brake if the car travels past the normal stopping zone

Final limit switches are the last line of electrical protection at terminal floors; if the car passes the normal stopping position, they cut power to the motor and brake to halt movement.

Question 5: In a worm-gear escalator drive, what is the advantage of a self-locking worm gear ratio?

Reduces noise levels
Increases motor efficiency
Allows variable speed operation
Prevents the escalator from overspeeding if the brake fails (Correct answer)

Correct answer: Prevents the escalator from overspeeding if the brake fails

A self-locking worm gear cannot be back-driven by the load, providing a mechanical backup that prevents runaway if the primary brake fails.

Question 6: When troubleshooting an elevator that won't respond to hall calls but runs normally on car calls, which system is most likely at fault?

The hall call system — buttons, wiring, or the hall call input circuit in the controller (Correct answer)
The door operator control board
The car operating panel (COP) wiring
The motor drive encoder feedback

Correct answer: The hall call system — buttons, wiring, or the hall call input circuit in the controller

Normal car call operation confirms the drive, safety circuit, and car controls are functional, isolating the fault to the hall call input circuits, hall buttons, or the controller's hall call processing.

Question 7: Which NFPA standard governs fire safety requirements for escalators and moving walks in buildings?

NFPA 72
NFPA 101 (Correct answer)
NFPA 70
NFPA 13

Correct answer: NFPA 101

NFPA 101 (Life Safety Code) addresses escalator use as a means of egress and includes fire safety requirements for escalator openings between floors.

Question 8: On a centrifugal governor, what component physically grips the governor rope when the tripping speed is reached?

Tension spring
Ratchet pawl
Flyweights
Jaws or gripper (Correct answer)

Correct answer: Jaws or gripper

When the flyweights expand outward from centrifugal force, they actuate jaws or grippers that clamp onto the governor rope.

Question 9: What is the maximum allowable hoistway door unlocking zone as specified by ASME A17.1?

9 inches above or below the landing
12 inches above or below the landing (Correct answer)
3 inches above or below the landing
6 inches above or below the landing

Correct answer: 12 inches above or below the landing

ASME A17.1 permits the hoistway door to be unlocked within 12 inches above or below the landing level.

Question 10: During a fire emergency, a passenger is trapped in an elevator car that has recalled to the lobby. The doors open but the passenger is unable to exit due to physical disability. Who has primary responsibility for assisting that passenger?

The elevator manufacturer's emergency hotline
The elevator technician on call
Building staff or fire department personnel at the designated level (Correct answer)
The building automation system (BAS) operator

Correct answer: Building staff or fire department personnel at the designated level

Building staff and fire department personnel at the designated recall level are responsible for assisting passengers who cannot self-evacuate; the elevator technician's role is equipment maintenance.

Question 11: What is the primary purpose of adding a car position indicator (CPI) during an elevator modernization?

To replace the need for leveling switches
To provide passengers with real-time floor position information, improving user experience and code compliance (Correct answer)
To display advertising content on the car interior
To reduce the controller's processing load

Correct answer: To provide passengers with real-time floor position information, improving user experience and code compliance

CPIs inform passengers of the car's current floor location and direction, meeting modern accessibility and user experience standards often required by updated codes.

Question 12: What is the purpose of a 'buffer stopping switch' in the elevator pit electrical circuit?

Opens the safety circuit when the car strikes an oil or spring buffer (Correct answer)
Resets the buffer oil level after compression
Cuts power to the pit lighting when the car is above the pit
Activates the pit stop switch alarm

Correct answer: Opens the safety circuit when the car strikes an oil or spring buffer

The buffer stopping switch opens the safety circuit when the car or counterweight contacts a buffer, cutting power and preventing further car movement.

Question 13: Which component seals the hoistway opening at each floor and must be interlocked to prevent opening unless the car is present?

Door operator clutch
Car gate
Hoistway door (landing door) with interlock (Correct answer)
Car door restrictor

Correct answer: Hoistway door (landing door) with interlock

Hoistway landing doors are equipped with interlocks that electrically and mechanically prevent the door from being opened unless the car is within the unlocking zone at that landing.

Question 14: A governor that is set to trip at too low a speed relative to rated speed would most likely cause:

Increased motor heating
Rope slippage on drive sheave
Safeties engaging during normal operation (Correct answer)
Hydraulic pressure buildup

Correct answer: Safeties engaging during normal operation

A governor tripping speed set too close to rated speed may cause nuisance safety engagements during normal elevator operation.

Question 15: What is the function of the governor switch (electrical governor contact)?

Cuts power to the motor and applies the brake at the first overspeed threshold (Correct answer)
Activates the car lighting circuit
Triggers the buffer engagement
Engages the governor rope gripper directly

Correct answer: Cuts power to the motor and applies the brake at the first overspeed threshold

The governor switch opens the elevator control circuit at the first tripping speed, removing power from the motor and applying the machine brake.

Question 16: A smoke detector that initiates Phase I recall is located in the elevator lobby on the third floor. After recalling all elevators to the main floor, which floor's detector caused the recall?

All detectors caused the recall simultaneously
Only the machine room detector
The detector at the designated level
The third-floor lobby detector (Correct answer)

Correct answer: The third-floor lobby detector

Any lobby smoke detector activation initiates Phase I recall; the third-floor detector in this scenario triggered the event.

Question 17: An elevator's door operator motor runs but the doors do not move. The MOST likely cause is:

Misadjusted door interlock
Blown door operator fuse
Broken or slipped door drive belt or chain (Correct answer)
Faulty door close button

Correct answer: Broken or slipped door drive belt or chain

If the motor runs without moving the doors, the mechanical coupling (belt, chain, or coupler) between the motor and door mechanism has failed.

Question 18: What is the purpose of pit ladders and lighting in elevator shafts?

Keep animals out of shaft
Allow safe access and visibility (Correct answer)
Support hydraulic pressure
Improve speed of travel

Correct answer: Allow safe access and visibility

Pit ladders and adequate lighting are safety requirements allowing technicians to enter and exit the pit safely for inspections and repairs.

Question 19: In a 2:1 roping arrangement, how does the rope speed compare to car speed?

Rope moves at half the car speed
Rope moves at twice the car speed (Correct answer)
Rope speed varies with load
Rope moves at the same speed as the car

Correct answer: Rope moves at twice the car speed

In a 2:1 roping system, the sheave on the car or counterweight acts as a movable pulley, so the rope must travel twice the distance the car travels.

Question 20: The traveling cable loop transition point (where the cable changes from hanging down to running upward) should ideally be located:

At the top of the hoistway to reduce the unsupported length of cable
At the machine room floor level for easy inspection access
Near the midpoint of the car's travel range to minimize cable movement and mechanical stress (Correct answer)
At the lowest landing to minimize cable stress during high-speed travel

Correct answer: Near the midpoint of the car's travel range to minimize cable movement and mechanical stress

Positioning the loop transition near mid-travel minimizes the total range of cable movement and reduces cumulative mechanical stress on conductors over the life of the installation.

Question 21: What function does the counterweight serve in a traction elevator?

Balances the car weight to reduce motor load (Correct answer)
Controls rope tension during acceleration
Prevents the car from free-falling
Limits hoistway door closing force

Correct answer: Balances the car weight to reduce motor load

The counterweight offsets the weight of the car plus approximately 40–50% of rated load, reducing the motor torque required to move the elevator.

Question 22: Which standard of practice is MOST important for ensuring quality in Governor & Overspeed Protection?

Strictly adhering to the same procedure in every situation
Following evidence-based protocols while adapting to specific circumstances (Correct answer)
Minimizing documentation to focus on practical work
Using the most advanced technology available regardless of need

Correct answer: Following evidence-based protocols while adapting to specific circumstances

Evidence-based protocols provide a foundation of proven practices, but effective Certified Elevator Technician professionals must also adapt their approach based on specific circumstances and individual case needs within Governor & Overspeed Protection.

Question 23: What does a 'brake pick' coil do in a dual-coil electromagnetic elevator brake?

Provides the initial high-current pulse to rapidly release the brake
Maintains the brake in the released position after the lift coil has acted
Controls the brake release timing relative to motor torque buildup
Both provides initial high current to open the brake and maintains release with lower current (Correct answer)

Correct answer: Both provides initial high current to open the brake and maintains release with lower current

In a dual-coil brake, the pick (lift) coil provides high initial current to rapidly open the brake while the hold coil then maintains the open position at lower power, reducing heat generation.

Question 24: What does the term 'contract speed' mean in the context of ASME A17.1 elevator regulations?

The rated speed for which the elevator is designed and tested (Correct answer)
The maximum speed reached during overspeed testing
The speed used to calculate minimum buffer capacity
The speed at which the safety device activates

Correct answer: The rated speed for which the elevator is designed and tested

Contract speed is the rated speed specified in the elevator's contract documents, which forms the basis for all code calculations including buffer sizing and governor settings.

Question 25: What is the role of the machine brake in a traction elevator during normal stopping?

It limits rope speed during descent
It holds the car stationary after the motor has stopped and the car has leveled (Correct answer)
It provides emergency deceleration if the motor fails
It slows the car from running speed to landing speed

Correct answer: It holds the car stationary after the motor has stopped and the car has leveled

The machine brake is a holding brake that engages after the motor decelerates the car; it maintains position at the landing, not the primary deceleration device.

Question 26: What type of motor is most commonly used in modern gearless traction elevator machines?

DC series wound motor
Universal AC/DC motor
Induction squirrel cage motor with variable voltage
Permanent magnet synchronous motor (PMSM) (Correct answer)

Correct answer: Permanent magnet synchronous motor (PMSM)

Permanent magnet synchronous motors are favored in modern gearless machines for their high efficiency, compact size, and precise speed control.

Question 27: When installing a hydraulic elevator, what is the purpose of the check valve in the hydraulic circuit?

Filters contaminants from the fluid
Controls descent speed
Regulates up-direction pressure
Prevents the car from sinking when the pump is off by blocking backflow of oil (Correct answer)

Correct answer: Prevents the car from sinking when the pump is off by blocking backflow of oil

The check valve holds oil pressure in the cylinder, keeping the car at its landed position when the pump motor is de-energized.

Question 28: What is the purpose of a 'top-of-car inspection' (TOCI) station in elevator electrical design?

Bypasses the door contacts during annual inspection
Allows the motor room technician to monitor the car position from above
Provides emergency lighting for hoistway inspection
Transfers control authority to the car top, limits speed to inspection speed, and requires continuous pressure operation (Correct answer)

Correct answer: Transfers control authority to the car top, limits speed to inspection speed, and requires continuous pressure operation

The TOCI station transfers control to the car top, restricts speed to no more than 150 ft/min (inspection speed), and requires constant-pressure operation for safe personnel movement.

Question 29: In an elevator safety circuit, what is a 'series circuit' configuration used for?

Providing redundancy so the system runs if any contact is closed
Ensuring that ALL safety contacts must be closed for the elevator to run (Correct answer)
Reducing voltage drop across each individual safety contact
Distributing power to multiple loads simultaneously

Correct answer: Ensuring that ALL safety contacts must be closed for the elevator to run

Safety devices are wired in series so that opening ANY single safety contact interrupts the entire circuit and stops elevator operation, providing a fail-safe architecture.

Question 30: Why is personal protective equipment (PPE) important for elevator technicians?

Improves technician appearance
Speeds up installation
Is optional per site supervisor
Reduces risk of workplace injury (Correct answer)

Correct answer: Reduces risk of workplace injury

PPE such as gloves, helmets, and safety harnesses reduce the risk of injury from falls, electrical contact, or falling objects.

Question 31: Which of the following best describes 'elevator lobby' as it relates to Phase I smoke detection per ASME A17.1?

The main building lobby only, regardless of elevator location
The enclosed area on each floor directly serving the elevator entrance doors (Correct answer)
The machine room and pit area combined
Any common area within 100 feet of an elevator bank

Correct answer: The enclosed area on each floor directly serving the elevator entrance doors

An elevator lobby for Phase I smoke detection purposes is the enclosed floor area directly serving the elevator entrance on each landing, not just the ground-floor lobby.

Question 32: What is the effect of connecting a 230V elevator control transformer primary to a 208V supply?

There will be no effect because both voltages are within 10% tolerance
The secondary voltage will remain at the rated value due to voltage regulation
The secondary output voltage will be proportionally lower than design, potentially causing control malfunctions (Correct answer)
The transformer will overheat and fail immediately

Correct answer: The secondary output voltage will be proportionally lower than design, potentially causing control malfunctions

A lower-than-rated primary voltage produces a proportionally lower secondary voltage, which can cause contactors to drop out or PLC inputs to fall below their minimum threshold.

Question 33: A hydraulic elevator experiences 'rough ride' during up travel only. The MOST likely cause is:

Air trapped in the hydraulic cylinder
Contaminated hydraulic fluid
A worn pump coupling (Correct answer)
Low oil level in the reservoir

Correct answer: A worn pump coupling

A worn or damaged pump coupling causes vibration and rough ride specifically during the up direction when the pump is driving the load.

Question 34: What is the purpose of a 'motor thermistor' or thermal overload device embedded in the elevator motor windings?

Provide a reference signal for torque control
Balance current between motor phases
Detect excessive motor winding temperature and signal the controller to shut down (Correct answer)
Measure motor speed for the VFD feedback loop

Correct answer: Detect excessive motor winding temperature and signal the controller to shut down

Embedded thermistors change resistance with temperature; when winding temperature exceeds safe limits, the controller detects the resistance change and shuts down the motor.

Question 35: What documentation practice is considered essential in Traction Elevator Mechanics within the Certified Elevator Technician field?

Only documenting unusual events or complications
Completing all documentation at the end of the workday
Recording actions, observations, and outcomes in real-time or as close to the event as possible (Correct answer)
Using shorthand notes that can be expanded later if needed

Correct answer: Recording actions, observations, and outcomes in real-time or as close to the event as possible

Real-time or near-real-time documentation in Traction Elevator Mechanics ensures accuracy, provides a contemporaneous record, and is considered the gold standard for professional accountability and legal defensibility.

Question 36: What is 'load weighing' used for in a modern elevator control system?

Triggering an overload alarm when the car exceeds the rated capacity
Both adjusting motor torque and triggering the overload alarm (Correct answer)
Adjusting motor torque and dispatching decisions based on measured car load
Calculating the annual maintenance schedule based on car trips

Correct answer: Both adjusting motor torque and triggering the overload alarm

Load weighing devices serve dual purposes: they feed load data to the drive for pre-torque (smooth starts) and trigger full-load or overload bypasses and alarms.

Question 37: Which standard of practice is MOST important for ensuring quality in Door Operators & Interlocks?

Strictly adhering to the same procedure in every situation
Using the most advanced technology available regardless of need
Minimizing documentation to focus on practical work
Following evidence-based protocols while adapting to specific circumstances (Correct answer)

Correct answer: Following evidence-based protocols while adapting to specific circumstances

Question 38: On a freight elevator with a bi-parting vertical-slide (freight) door, the interlock is typically located:

At the top of the upper door panel where the locking bolt engages (Correct answer)
On the car gate at the car sill level
At the bottom of each door panel
At the center of the door where the panels meet

Correct answer: At the top of the upper door panel where the locking bolt engages

On bi-parting vertical freight doors, the interlock locking mechanism is typically located at the top of the upper (or lower) door panel where the bolt engages a keeper as the door reaches the closed position.

Question 39: What documentation practice is considered essential in Fire Service & Emergency Operations within the Certified Elevator Technician field?

Only documenting unusual events or complications
Recording actions, observations, and outcomes in real-time or as close to the event as possible (Correct answer)
Using shorthand notes that can be expanded later if needed
Completing all documentation at the end of the workday

Correct answer: Recording actions, observations, and outcomes in real-time or as close to the event as possible

Real-time or near-real-time documentation in Fire Service & Emergency Operations ensures accuracy, provides a contemporaneous record, and is considered the gold standard for professional accountability and legal defensibility.

Question 40: What is meant by 'contract speed' of a traction elevator?

The rated speed at which the elevator is designed and certified to operate under full load (Correct answer)
The maximum instantaneous speed ever recorded
The inspection speed used during annual testing
The speed at which the governor trips

Correct answer: The rated speed at which the elevator is designed and certified to operate under full load

Contract speed is the rated speed specified in the elevator contract and approved by the authority having jurisdiction, used for all safety device settings.

Question 41: What is the function of the deflector sheave in a machine room or overhead?

Lubricates the hoist ropes automatically
Guides the governor rope
Serves as a secondary traction point to increase rope grip
Changes the direction of the hoist ropes between the drive sheave and the car or counterweight (Correct answer)

Correct answer: Changes the direction of the hoist ropes between the drive sheave and the car or counterweight

A deflector sheave redirects the hoist ropes to properly align them between the drive sheave and the car or counterweight connection points.

Question 42: How often must routine safety inspections typically be conducted on commercial elevators?

Only before installation
When requested by building owner
Every 5 years
Annually (Correct answer)

Correct answer: Annually

Most jurisdictions require annual safety inspections to ensure continued safe operation and compliance with code requirements.

Question 43: A technician is measuring interlock contact resistance and reads 4 ohms across a closed interlock contact. This reading indicates:

An open circuit — the contacts are not touching
A short circuit across the interlock coil
Normal contact resistance within specification
Excessive contact resistance indicating dirty, pitted, or worn contacts needing service (Correct answer)

Correct answer: Excessive contact resistance indicating dirty, pitted, or worn contacts needing service

Closed interlock contacts should measure nearly zero resistance; a reading of 4 ohms indicates corrosion, pitting, or wear that increases resistance and can cause erratic safety circuit behavior.

Question 44: When replacing conductors in an existing elevator installation, the new conductors must:

Be installed using the original wiring methods even if those methods are now outdated
Match the original manufacturer's wire type and part number exactly
Be the same insulation color as the original wiring being replaced
Meet or exceed current applicable code requirements regardless of the original installation date (Correct answer)

Correct answer: Meet or exceed current applicable code requirements regardless of the original installation date

Replacement conductors must comply with current code requirements; the original installation date does not allow grandfathering of substandard replacement materials or methods.

Question 45: A car position indicator shows the car at floor 4, but the car is physically between floors 3 and 4. This indicates a fault in the:

Motor encoder wiring
Position reference system or selector (Correct answer)
Door interlock circuit
Buffer compression switches

Correct answer: Position reference system or selector

A mismatch between displayed and actual position points to a fault in the position reference system, such as a missed vane, selector, or encoder pulse.

Question 46: Which type of elevator does NOT require a centrifugal governor but uses an alternative overspeed protection method?

Drum-drive elevator
Hydraulic elevator (Correct answer)
Traction elevator
Winding drum elevator

Correct answer: Hydraulic elevator

Hydraulic elevators use a rupture valve or similar device instead of a centrifugal governor because they are driven by fluid pressure, not a rope/drum.

Question 47: When a building fire alarm system activates but the fire is confirmed to be in the basement, elevators should recall to:

The floor immediately above the basement
The alternate designated level (one floor above main) (Correct answer)
The top floor of the building
The main designated level (lobby)

Correct answer: The alternate designated level (one floor above main)

When the main designated level is at or adjacent to the fire floor, elevators recall to the alternate designated level, typically one floor above the main.

Question 48: When firefighters activate Phase I Emergency Recall using the key switch, elevators should return to the designated level within how many seconds for a travel time not exceeding 60 seconds?

60 seconds (Correct answer)
30 seconds
120 seconds
90 seconds

Correct answer: 60 seconds

ASME A17.1 requires elevators to return to the designated level within 60 seconds when travel time does not exceed 60 seconds.

Question 49: What does a negative or reverse phase relay protect against in an elevator system?

Overloading of the hoisting motor
Overvoltage on the main line
Incorrect motor rotation due to swapped power phases (Correct answer)
Ground faults in the control panel

Correct answer: Incorrect motor rotation due to swapped power phases

A reverse phase relay detects incorrect phase sequence and prevents the motor from running in the wrong direction, which could cause the car to travel opposite the commanded direction.

Question 50: Under ASME A17.1, the 'ascending car overspeed protection' requirement was added primarily to address which hazard?

Car free-fall during descent
Rope stretch causing misleveling
Excess vibration during high-speed travel
Uncontrolled upward car movement if the brake fails (Correct answer)

Correct answer: Uncontrolled upward car movement if the brake fails

Ascending car overspeed protection (ACOP) was introduced to stop uncontrolled upward car movement, such as when a brake fails and the counterweight drives the car upward.

Question 51: During inspection of traveling cables, which condition requires immediate removal from service?

Slight stiffness observed in cold ambient temperature conditions
Minor surface discoloration from age and normal oxidation
Cable length providing 8 inches of excess loop at lowest landing
Exposed or damaged conductors, severe kinking, or cracked insulation (Correct answer)

Correct answer: Exposed or damaged conductors, severe kinking, or cracked insulation

Damaged insulation, exposed conductors, or physical deformation create immediate shock hazards and unreliable electrical connections that must be corrected before the elevator is returned to service.

Question 52: What documentation practice is considered essential in Door Operators & Interlocks within the Certified Elevator Technician field?

Only documenting unusual events or complications
Completing all documentation at the end of the workday
Recording actions, observations, and outcomes in real-time or as close to the event as possible (Correct answer)
Using shorthand notes that can be expanded later if needed

Correct answer: Recording actions, observations, and outcomes in real-time or as close to the event as possible

Real-time or near-real-time documentation in Door Operators & Interlocks ensures accuracy, provides a contemporaneous record, and is considered the gold standard for professional accountability and legal defensibility.

Question 53: On a moving walk, the pallet or belt speed must not exceed which value when the angle of inclination exceeds 3 degrees?

150 ft/min
100 ft/min
140 ft/min
125 ft/min (Correct answer)

Correct answer: 125 ft/min

ASME A17.1 limits inclined moving walk speed to 125 ft/min when the angle exceeds 3 degrees to ensure passenger safety.

Question 54: How does risk management apply to daily practice in Modernization & Upgrades for Certified Elevator Technician professionals?

Only through responding to incidents after they occur
Through proactive identification of potential hazards and implementation of preventive measures (Correct answer)
Through annual safety audits exclusively
By avoiding high-risk situations entirely

Correct answer: Through proactive identification of potential hazards and implementation of preventive measures

Effective risk management in Modernization & Upgrades requires proactive hazard identification and preventive measures, not just reactive responses. This approach reduces incidents, improves outcomes, and protects both professionals and clients.

Question 55: When a hydraulic elevator is converted from a two-speed AC motor to a VVVF pump unit, what operational benefit is achieved?

Smoother acceleration and deceleration with improved leveling accuracy (Correct answer)
The elevator can now travel to a higher floor count
Elimination of the need for a pressure relief valve
Reduced pit depth requirement

Correct answer: Smoother acceleration and deceleration with improved leveling accuracy

VVVF drives allow variable pump speed, producing smooth, precise car movement and accurate floor leveling compared to two-speed motor systems.

Question 56: Under ADA, what is the maximum force required to activate an elevator hall call button?

3 lbf (13.3 N)
8 lbf (35.6 N)
10 lbf (44.5 N)
5 lbf (22.2 N) (Correct answer)

Correct answer: 5 lbf (22.2 N)

ADA Section 407.2.1.1 limits the activation force for elevator hall call buttons to a maximum of 5 lbf to accommodate passengers with limited hand strength.

Question 57: What is the purpose of the retiring cam on a car door operator?

Limits the speed of the car door during closing
Prevents the hoistway door from bouncing open after closing
Engages the hoistway door coupling when the car arrives at a landing (Correct answer)
Provides the electrical interlock signal to the controller

Correct answer: Engages the hoistway door coupling when the car arrives at a landing

The retiring cam extends when the car approaches a landing to mechanically engage the hoistway door coupling device, enabling the car door operator to open the hoistway door.

Question 58: What must be verified before performing the final acceptance test on a newly installed elevator?

That the machine room temperature is below 70°F
That at least 3 trips have been logged in the controller
Only that the car lights work
That all required inspections, adjustments, and safety device tests are complete and documented (Correct answer)

Correct answer: That all required inspections, adjustments, and safety device tests are complete and documented

All components must be properly installed, adjusted, and tested—including safeties, buffers, governor, and interlocks—and records must be available before final acceptance.

Question 59: A building owner asks why some elevators have TWO designated recall floors (main and alternate). Which scenario makes the alternate level necessary?

Buildings over 75 feet must designate two recall floors per IBC
Buildings with more than 10 elevators always need an alternate level
When smoke is detected at the main designated level lobby, elevators divert to the alternate (Correct answer)
The alternate level is for freight elevators only

Correct answer: When smoke is detected at the main designated level lobby, elevators divert to the alternate

The alternate designated level is required specifically for situations where smoke is detected in the lobby of the main designated level, preventing recall into a hazardous environment.

Question 60: The 'Category 5 test' for elevators under ASME A17.1 requires which type of load test?

No-load test at rated speed
Full rated load test with safety device actuation (Correct answer)
150% rated load dynamic test
125% rated load static test

Correct answer: Full rated load test with safety device actuation

A Category 5 test is a full load test that includes actuation of the safety device with the rated load in the car to verify the car safety system can stop and hold the load.

Question 61: Under OSHA 29 CFR 1910.68, the maximum rated load for a manlift step platform is:

300 lbs
350 lbs
250 lbs (Correct answer)
200 lbs

Correct answer: 250 lbs

OSHA 29 CFR 1910.68 specifies that manlift step platforms must be designed to carry a maximum load of 250 lbs.

Question 62: In Accessibility & ADA Compliance, what is the FIRST step a CET professional should take when encountering a new case or situation?

Implement an immediate solution based on past experience
Conduct a comprehensive assessment and gather all relevant information (Correct answer)
Document the situation and wait for further instructions
Consult with a supervisor before taking any action

Correct answer: Conduct a comprehensive assessment and gather all relevant information

In Accessibility & ADA Compliance, a thorough initial assessment ensures all relevant factors are identified before deciding on an appropriate course of action. This systematic approach is fundamental to Certified Elevator Technician practice.

Question 63: The ASME A17.1 code requires that a pit ladder be provided when the pit depth exceeds what measurement?

60 inches
48 inches (Correct answer)
36 inches
24 inches

Correct answer: 48 inches

ASME A17.1 requires a fixed ladder in the pit when pit depth exceeds 35 inches (approximately 36 inches is the threshold that triggers the requirement at 35+ inches).

Question 64: During modernization, an elevator's buffer is found to be oil-type but undersized for the new higher contract speed. What must be done?

Increase the pit lighting level
Add a second pit stop switch
Paint the buffer red for visibility
Replace the buffer with one rated for the new contract speed and stroke (Correct answer)

Correct answer: Replace the buffer with one rated for the new contract speed and stroke

Buffers must be rated for the actual contract speed; an undersized oil buffer cannot absorb the kinetic energy at the new speed.

Question 65: Which factor most directly determines the sheave groove diameter's effect on rope fatigue life?

Groove depth
The ratio of sheave pitch diameter to rope diameter (D/d ratio) (Correct answer)
Groove hardness
Number of grooves on the sheave

Correct answer: The ratio of sheave pitch diameter to rope diameter (D/d ratio)

The D/d ratio determines the bending radius the rope experiences each cycle; a higher D/d ratio means less bending stress and longer rope fatigue life.

Question 66: Which ASME A17.1 rule addresses the requirement for an astragal (or equivalent protection) on multi-panel hoistway doors?

To prevent fingers from being caught between the leading edges of closing door panels (Correct answer)
To act as a fire barrier between door panels
To seal the air gap between panels during normal operation
To increase the sound insulation of the hoistway door

Correct answer: To prevent fingers from being caught between the leading edges of closing door panels

An astragal or equivalent guard on multi-panel doors prevents finger entrapment in the gap formed between meeting door panel edges during closing.

Question 67: When a conflict arises between standard procedures and a unique situation in Fire Service & Emergency Operations, what should a CET professional prioritize?

The most cost-effective solution available
Strict adherence to written procedures without exception
Safety and ethical obligations while seeking expert consultation (Correct answer)
The preference of the client or stakeholder

Correct answer: Safety and ethical obligations while seeking expert consultation

Safety and ethics always take priority in Fire Service & Emergency Operations. When standard procedures don't adequately address a unique situation, consulting with experienced colleagues or supervisors ensures both safety and professional standards are maintained.

Question 68: What is the purpose of a limit switch in elevator systems?

Prevent over-travel of the elevator car (Correct answer)
Measure speed
Signal for door closing
Control car lighting

Correct answer: Prevent over-travel of the elevator car

Limit switches prevent the elevator from moving beyond safe boundaries by cutting off power when limits are reached.

Question 69: What is 'hunting' in an elevator leveling system and what commonly causes it?

The controller searching multiple floors for an assigned hall call
The car overshooting and repeatedly correcting around the landing level, often caused by excessive leveling gain or a faulty encoder (Correct answer)
The car door hunting for the fully open mechanical stop
Motor speed fluctuation during full-speed travel caused by VFD instability

Correct answer: The car overshooting and repeatedly correcting around the landing level, often caused by excessive leveling gain or a faulty encoder

Leveling 'hunting' occurs when the car oscillates above and below the landing level repeatedly, typically due to over-tuned leveling gain, a noisy encoder signal, or a sticking leveling vane.

Question 70: Per NEC 620.22, elevator car lighting circuits must not exceed which voltage rating?

24V for low-voltage safety compliance
120V to protect car occupants from high-voltage hazards (Correct answer)
277V consistent with commercial branch circuit standards
480V to permit use of standard building fluorescent fixtures

Correct answer: 120V to protect car occupants from high-voltage hazards

NEC 620.22 limits elevator car lighting to 120V maximum because the car is an occupied space, and lower voltage reduces shock hazard risk to passengers and technicians.

Question 71: What does 'harmonic distortion' from an elevator VFD affect in a building electrical system?

Only the elevator motor windings
Other equipment connected to the same electrical distribution system (Correct answer)
Only lighting circuits on the same phase
The VFD's internal DC bus only

Correct answer: Other equipment connected to the same electrical distribution system

VFDs generate harmonic currents that travel through the building's electrical distribution system and can cause overheating, nuisance tripping, and interference with sensitive equipment throughout the building.

Question 72: Per NEC 620.51, the main line disconnecting means for elevator equipment must be located:

In the pit to allow technicians to de-energize before pit entry
In the machine room or machinery space, accessible only to qualified personnel (Correct answer)
At the building main service panel only, centralized for fire department access
Inside the elevator car so occupants can shut off power in emergencies

Correct answer: In the machine room or machinery space, accessible only to qualified personnel

NEC 620.51 requires the main disconnecting means to be in the machine room or machinery space so that only qualified elevator technicians can de-energize the equipment.

Question 73: When a conflict arises between standard procedures and a unique situation in Accessibility & ADA Compliance, what should a CET professional prioritize?

Safety and ethical obligations while seeking expert consultation (Correct answer)
The most cost-effective solution available
The preference of the client or stakeholder
Strict adherence to written procedures without exception

Correct answer: Safety and ethical obligations while seeking expert consultation

Safety and ethics always take priority in Accessibility & ADA Compliance. When standard procedures don't adequately address a unique situation, consulting with experienced colleagues or supervisors ensures both safety and professional standards are maintained.

Question 74: What issue is indicated by frequent elevator leveling problems?

Broken ceiling tiles
Stuck call button
Incorrect floor numbering
Faulty leveling sensors or brakes (Correct answer)

Correct answer: Faulty leveling sensors or brakes

Frequent leveling issues can signal faulty sensors or brake malfunctions affecting stop accuracy.

Question 75: What is the primary function of the deflector sheave in a traction elevator?

To balance the counterweight
To increase rope tension
To redirect the hoist ropes to a different angle (Correct answer)
To act as a secondary brake

Correct answer: To redirect the hoist ropes to a different angle

A deflector sheave redirects the hoist ropes so they hang vertically from the drive sheave to the car and counterweight.

Question 76: Which standard of practice is MOST important for ensuring quality in Accessibility & ADA Compliance?

Strictly adhering to the same procedure in every situation
Following evidence-based protocols while adapting to specific circumstances (Correct answer)
Minimizing documentation to focus on practical work
Using the most advanced technology available regardless of need

Correct answer: Following evidence-based protocols while adapting to specific circumstances

Question 77: In a microprocessor-based elevator control system, what is a 'serial link' typically used for?

Communicating data between the machine room controller and the car operating panel (COP) (Correct answer)
Providing a dedicated safety circuit path for the door contacts
Carrying high-voltage power to the car top junction box
Supplying DC power to the motor encoder

Correct answer: Communicating data between the machine room controller and the car operating panel (COP)

A serial communication link (e.g., CAN bus or RS-485) transmits button calls, status data, and commands between the controller and the COP, reducing the number of traveling cables needed.

Question 78: An escalator's step band must be capable of supporting a minimum load of how many pounds per square foot of step surface?

100 lbs/ft² (Correct answer)
75 lbs/ft²
150 lbs/ft²
120 lbs/ft²

Correct answer: 100 lbs/ft²

ASME A17.1 requires escalator steps to support a minimum live load of 100 lbs per square foot to ensure structural adequacy under passenger loads.

Question 79: In an elevator control circuit, what does a 'slowdown' switch typically do?

Signals the controller to begin deceleration before reaching a landing (Correct answer)
Stops the car at the terminal floor immediately
Engages the emergency brake system
Switches the motor from high to low speed winding

Correct answer: Signals the controller to begin deceleration before reaching a landing

A slowdown switch triggers the controller to initiate deceleration so the car arrives at a landing at proper leveling speed.

Question 80: In Door Operators & Interlocks, what is the FIRST step a CET professional should take when encountering a new case or situation?

Consult with a supervisor before taking any action
Implement an immediate solution based on past experience
Conduct a comprehensive assessment and gather all relevant information (Correct answer)
Document the situation and wait for further instructions

Correct answer: Conduct a comprehensive assessment and gather all relevant information

In Door Operators & Interlocks, a thorough initial assessment ensures all relevant factors are identified before deciding on an appropriate course of action. This systematic approach is fundamental to Certified Elevator Technician practice.

Question 81: What is the maximum allowable angle of inclination for a standard passenger escalator per ASME A17.1?

30 degrees
45 degrees
25 degrees
35 degrees (Correct answer)

Correct answer: 35 degrees

ASME A17.1 permits escalator inclination angles of 30 degrees or less, with 35 degrees allowed under specific conditions for short-rise units.

Question 82: In elevator electrical work, what does 'megger testing' verify?

Motor shaft alignment and bearing condition
Correct phase sequence of the main power supply
Continuity of the safety circuit chain
Insulation resistance of wiring, motors, and cables (Correct answer)

Correct answer: Insulation resistance of wiring, motors, and cables

A megohmmeter (megger) applies high DC voltage to measure insulation resistance, verifying that insulation has not degraded due to moisture, heat, or age.

Question 83: When replacing a drum-type elevator machine with a geared traction machine during modernization, what critical recalculation must be performed?

Pit depth measurement
Number of floors the elevator serves
Counterweight balance and rope factor of safety (Correct answer)
Paint color selection for the machine room

Correct answer: Counterweight balance and rope factor of safety

Counterweight sizing and rope factor of safety must be recalculated to ensure safe operation with the new traction machine configuration.

Question 84: What is the significance of the 'unswitched' (always-hot) conductor requirement for elevator machine room lighting per NEC Article 620?

Lighting must be on a 20A dedicated circuit only
Lighting must remain on even when the main line disconnect is opened (Correct answer)
Lighting must use LED fixtures exclusively
Lighting must be switched from inside the machine room door

Correct answer: Lighting must remain on even when the main line disconnect is opened

NEC 620.23 requires machine room lighting to be on a circuit that remains energized even when the elevator main line disconnect is open, ensuring technicians have light while working on de-energized equipment.

Question 85: Under ADA accessibility standards, what is the maximum slope allowed at an elevator landing approach area?

1:12 (8.33%)
1:20 (5%)
1:48 (2.08%) (Correct answer)
1:50 (2%)

Correct answer: 1:48 (2.08%)

ADA limits the slope of elevator landing approach areas to 1:48 (2.08%) in any direction to ensure stable wheelchair positioning.

Question 86: In a duplex elevator group, what does 'dispatching logic' in the group controller determine?

Which car responds to a hall call based on position, direction, and load (Correct answer)
The door open time for each landing
The motor acceleration rate for each individual car
The leveling sensitivity at each floor

Correct answer: Which car responds to a hall call based on position, direction, and load

Dispatching logic assigns hall calls to the most efficient car based on real-time factors such as car position, travel direction, and passenger load.

Question 87: What is the PRIMARY purpose of continuing education requirements in Governor & Overspeed Protection for CET professionals?

Networking with other professionals in the field
Maintaining current knowledge and competency as the field evolves (Correct answer)
Fulfilling mandatory regulatory requirements only
Earning additional credentials for career advancement

Correct answer: Maintaining current knowledge and competency as the field evolves

Continuing education in Governor & Overspeed Protection ensures professionals maintain current knowledge and skills as standards, technologies, and best practices evolve in the Certified Elevator Technician field.

Question 88: According to ASME A17.1, a 'mainline disconnect switch' for an elevator must be located:

In a locked cabinet accessible only to the fire department
Adjacent to the elevator entrance on the lowest floor
Within the elevator machine room, within sight of the motor controller (Correct answer)
In the main electrical panel of the building

Correct answer: Within the elevator machine room, within sight of the motor controller

ASME A17.1 requires the mainline disconnect switch to be located within the machine room within sight of the motor controller so that technicians can de-energize equipment safely.

Question 89: After a fire incident, an elevator that was used for Phase II firefighters' service should be:

Returned to normal service immediately after the all-clear is announced
Recalibrated by the manufacturer before any use
Left on Phase II standby mode for 24 hours
Inspected by a certified elevator technician before being returned to normal service (Correct answer)

Correct answer: Inspected by a certified elevator technician before being returned to normal service

After firefighters' service use, a certified elevator technician should inspect the equipment for damage or faults before returning the elevator to normal public service.

Question 90: What must be verified before energizing an elevator system that has had the traveling cable replaced?

That the cable manufacturer is on the approved vendor list
That the new cable has the same outer jacket color as the original
That the cable length is exactly equal to the hoistway height
That all conductors are correctly landed, insulation resistance is acceptable, and no short circuits exist (Correct answer)

Correct answer: That all conductors are correctly landed, insulation resistance is acceptable, and no short circuits exist

Before energizing, technicians must verify correct terminations at both ends, perform a megger test for insulation integrity, and confirm continuity without shorts between conductors.

Question 91: Under ASME A17.1 Rule 2.26.1, a hoistway must have a clearance of at least how many inches between the car and the hoistway wall on the sides and rear?

2 inches
1 inch (Correct answer)
4 inches
3 inches

Correct answer: 1 inch

ASME A17.1 Rule 2.26.1 requires a minimum clearance of 1 inch between the car enclosure and the hoistway enclosure on sides and rear.

Question 92: What is the MOST common cause of hydraulic elevator cylinder corrosion on underground installations?

Excessive pump pressure
High hydraulic fluid temperature
Electrolytic corrosion from stray electrical currents in the soil (Correct answer)
Contaminated hydraulic fluid inside the cylinder

Correct answer: Electrolytic corrosion from stray electrical currents in the soil

Underground steel cylinders are susceptible to electrolytic (galvanic) corrosion caused by stray ground currents passing through the soil.

Question 93: A traction elevator's guide rails show excessive rust pitting. What is the PRIMARY concern with this condition?

Lubricant contamination of the pit
Electrical grounding issues
Increased guide shoe wear
Impaired safety engagement and car ride quality (Correct answer)

Correct answer: Impaired safety engagement and car ride quality

Pitted rails can prevent the safety device from gripping uniformly, compromising emergency stopping performance and causing rough car movement.

Question 94: During a modernization, the elevator inspector notices the existing hoistway clearances do not meet current ASME A17.1 requirements. How is this typically handled?

A variance or equivalency ruling is requested from the authority having jurisdiction (AHJ) (Correct answer)
The car must be reduced in size
The hoistway must be rebuilt before the permit is issued
The modernization permit is denied outright

Correct answer: A variance or equivalency ruling is requested from the authority having jurisdiction (AHJ)

When existing conditions cannot physically meet current code, a variance or equivalency is sought from the AHJ to document acceptance of the non-conforming condition.

Question 95: What type of hydraulic fluid is recommended for environmentally sensitive installations?

Petroleum-based ISO VG 46 fluid
Phosphate ester fire-resistant fluid
Biodegradable vegetable-based or synthetic ester fluid (Correct answer)
Water-glycol hydraulic fluid

Correct answer: Biodegradable vegetable-based or synthetic ester fluid

Biodegradable vegetable-based or synthetic ester fluids are used in environmentally sensitive areas because they break down naturally if spilled.

Question 96: What is the function of an 'up-direction' contactor in a traditional relay-logic elevator controller?

Reverses motor phase sequence to drive the car in the up direction (Correct answer)
Energizes the motor for counterclockwise rotation to move the car downward
Controls the speed of the motor during upward travel only
Applies holding current to the electromagnetic brake

Correct answer: Reverses motor phase sequence to drive the car in the up direction

The up-direction contactor reverses the phase sequence of the motor supply, causing the motor to rotate in the direction that moves the car upward.

Question 97: Conductors from different systems (such as lighting, power, and signal circuits) installed in the same elevator wireway must:

All be grounded to a single common point within the wireway
Have identical insulation color coding throughout the installation
Be separated by a metal barrier or otherwise comply with NEC requirements for system separation (Correct answer)
Always be the same AWG gauge to prevent voltage differences

Correct answer: Be separated by a metal barrier or otherwise comply with NEC requirements for system separation

NEC Article 620 and ASME A17.1 require separation of conductors from different systems to prevent electrical interference, cross-talk, and safety hazards from mixing incompatible circuit types.

Question 98: In a machine room, what is the purpose of the 'selector' or 'dispatching system'?

Selects the appropriate brake type for the load
Tracks car position and manages hall and car calls (Correct answer)
Selects the oil type for the hydraulic system
Chooses which motor winding to energize

Correct answer: Tracks car position and manages hall and car calls

The selector is a position-tracking and dispatching system that monitors car location and manages the queue of hall and car calls for efficient service.

Question 99: A progressive safety device is distinguished from an instantaneous safety because it:

Operates only in the up direction
Requires a heavier governor rope
Gradually increases stopping force to limit deceleration rate (Correct answer)
Uses a hydraulic actuator instead of mechanical linkage

Correct answer: Gradually increases stopping force to limit deceleration rate

Progressive safeties use a wedge or roller system that gradually increases clamping force, limiting car deceleration to protect passengers from injury.

Question 100: Which of the following scenarios would constitute an ADA violation in an elevator installation?

The cab has a minimum 36-inch clear door opening
The elevator arrives at the floor and emits one chime for upward travel
Car controls have raised characters with Braille immediately below
A hall call button illuminates only after the call is registered and not before (Correct answer)

Correct answer: A hall call button illuminates only after the call is registered and not before

ADA Section 407.2.1.2 requires call buttons to provide visible confirmation (illumination) when the call is registered, not just after the fact.

Certified Elevator Technician (CET)

The NAEC CET certification validates advanced knowledge and skill in elevator installation, maintenance, repair, and safety compliance. It is the professional benchmark for elevator technicians, covering electrical systems, mechanical systems, safety codes, and troubleshooting.

100

Questions

180 min

Time Limit

70%

To Pass

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