NCCER Core Curriculum Exam — Questions and Answers

Question 1: What does a revision cloud on a construction drawing indicate?

An area with underground utilities
A zone requiring special weather protection
An area where demolition will occur
An area that has been modified since the previous version of the drawing (Correct answer)

Correct answer: An area that has been modified since the previous version of the drawing

Revision clouds are irregular cloud-shaped outlines drawn around areas of a drawing that have been changed or updated since the previous revision, making it easy to identify what is different.

Question 2: When using a power drill. proper ground fault protection will prevent _______.

you from losing your grip
excess noise
electric shock (Correct answer)
drilling into electrical wire

Correct answer: electric shock

Proper ground fault protection, typically provided by a GFCI, is specifically designed to detect and interrupt electrical current flow when a ground fault occurs. This rapid interruption prevents the flow of electricity through a person's body, thereby protecting against electric shock. It is a vital safety measure when using power tools, especially in damp or wet conditions.

Question 3: Which signal should a worker give to a crane operator to indicate 'stop' using standard hand signals?

One arm raised with a closed fist
One arm extended with palm up, making a circular motion
Both arms extended outward with palms down, moving arms back and forth horizontally (Correct answer)
Both arms waving overhead in large circles

Correct answer: Both arms extended outward with palms down, moving arms back and forth horizontally

The standard hand signal for 'stop' is both arms extended outward from the body with palms down, moving the arms back and forth horizontally in a sweeping motion.

Question 4: What tool would be used to cut crown molding?

Planer
Miter saw (Correct answer)
Hammer
Circular saw

Correct answer: Miter saw

A miter saw is the ideal tool for cutting crown molding due to its ability to make precise angle cuts (miters) and bevel cuts. Crown molding requires compound angles to fit correctly, and a miter saw allows for accurate adjustments to achieve these complex cuts, ensuring tight and professional-looking joints.

Question 5: On a floor plan drawn at 1/4 inch = 1 foot scale, a wall measures 3 inches on the drawing. What is the actual length of the wall?

3 feet
12 feet (Correct answer)
16 feet
8 feet

Correct answer: 12 feet

At 1/4" = 1' scale, each quarter inch on the drawing represents one foot. A 3-inch line contains 12 quarter-inches, so the actual wall length is 12 feet.

Question 6: When you see a potential source of delay on a project, ______.

monitor the problem until it reaches an urgent stage
notify your supervisor immediately (Correct answer)
ask a co-worker to determine the problem
stop working on your task until the problem is solved

Correct answer: notify your supervisor immediately

Identifying potential delays early is crucial for effective project management. Notifying your supervisor immediately allows them to assess the situation, allocate resources, or adjust plans proactively to mitigate the impact of the delay. This proactive communication prevents minor issues from escalating into major problems and helps maintain project timelines.

Question 7: A power miter saw combines a miter box with a ______.

crosscut saw
circular saw (Correct answer)
bandsaw
nail-cutter saw

Correct answer: circular saw

A power miter saw combines the precise angle-cutting capabilities of a miter box with the cutting power and speed of a circular saw blade. This integration allows for accurate crosscuts and miter cuts on various materials, making it a versatile and essential tool for woodworking and construction tasks.

Question 8: Imagine you have a problem on your job site. Following the five-step problem-solving procedure, you choose a solution and implement it. However, your solution doesn't solve the problem. Your next step should be to _______.

abandon you efforts
select another possible solution (Correct answer)
consult the employee handbook
ask someone else to solve the problem

Correct answer: select another possible solution

In the problem-solving process, if an implemented solution doesn't resolve the problem, the next logical step is to revisit the identified options and select an alternative solution. Effective problem-solving is often iterative, requiring flexibility and a willingness to try different approaches until a successful outcome is achieved. Abandoning efforts or delegating the problem without further attempts is counterproductive.

Question 9: A craftsperson is looking at a floor plan with a scale of 1/4" = 1'-0". Using an architect's scale, they measure a wall to be 3 1/2 inches long. What is the actual length of the wall?

12 feet
14 feet (Correct answer)
7 feet
10 feet

Correct answer: 14 feet

The scale 1/4" = 1'-0" means that every quarter-inch on the drawing represents one foot in reality. To find the actual length, you divide the measured length (3.5 inches) by the scale factor (0.25 inches per foot). 3.5 / 0.25 = 14. Therefore, the actual length of the wall is 14 feet.

Question 10: One of the most common grounding systems used for protection against accidental electrical shock is the ____ system.

Two-wire
Four-wire
Three-wire (Correct answer)
Five-wire

Correct answer: Three-wire

The three-wire grounding system is a crucial safety feature in electrical installations. It includes a hot wire, a neutral wire, and a dedicated ground wire that provides a safe path for electricity to flow to the earth in case of a fault. This prevents dangerous electrical shocks by quickly tripping a circuit breaker or fuse.

Question 11: Safety _________.

does not normally need to be trained
is a learned behavior and attitude (Correct answer)
comes naturally to most individuals
primarily depends on workers in the field

Correct answer: is a learned behavior and attitude

Safety is fundamentally a learned behavior and attitude, not something that comes naturally. It requires training, awareness, adherence to procedures, and a proactive mindset from all individuals in a workplace. Developing a strong safety culture involves continuous education and reinforcement of safe practices to prevent accidents.

Question 12: Before you plug any saw into a power source, make sure the ______.

speed is set to LOW
lower blade guard is pulled back
work has been clamped down
power switch in the OFF position (Correct answer)

Correct answer: power switch in the OFF position

Before plugging any saw into a power source, it is a critical safety practice to ensure the power switch is in the OFF position. This prevents the saw from unexpectedly starting up immediately upon connection, which could cause serious injury or damage. Always verify the switch position before connecting power.

Question 13: According to Ohm's Law, if voltage remains constant and resistance doubles, what happens to current?

Current is reduced by half (Correct answer)
Current remains the same
Current doubles
Current increases by four times

Correct answer: Current is reduced by half

Ohm's Law states I = V/R; when R doubles with constant V, current (I) is reduced by half.

Question 14: What is the best way to protect yourself when working near moving vehicles and equipment?

Set up reflective flags around your work area.
Have a signaler direct your movements.
Ensure that a qualified person is on the job site.
Wear a reflective or high-visibility vest. (Correct answer)

Correct answer: Wear a reflective or high-visibility vest.

Wearing a reflective or high-visibility vest is the most effective way to protect yourself when working near moving vehicles and equipment. This makes you easily visible to equipment operators and drivers, especially in low light conditions or busy work zones. Increased visibility significantly reduces the risk of accidents and injuries by ensuring you are seen.

Question 15: On a set of construction drawings, which type of line is thick and solid, used to represent the main outlines of a building or structure that are visible in a particular view?

Center line
Hidden line
Dimension line
Object line (Correct answer)

Correct answer: Object line

Object lines, also known as visible lines, are the thickest and most prominent lines on a blueprint. They are used to show the major outlines of the features of the building, such as walls, floors, and roofs, that are directly visible from the perspective of the drawing.

Question 16: Which strategy is most effective for managing time on a construction project?

Completing tasks as they come up without planning
Working on the easiest tasks first regardless of urgency
Delegating all tasks to other team members
Prioritizing tasks based on deadlines and dependencies (Correct answer)

Correct answer: Prioritizing tasks based on deadlines and dependencies

Prioritizing tasks based on deadlines and dependencies ensures that critical-path work gets completed on schedule and resources are used efficiently.

Question 17: What is the primary purpose of the neutral (white) wire in a standard 120V circuit?

To carry fault current to ground
To protect against voltage surges
To supply additional power to the load
To complete the circuit by returning current to the source (Correct answer)

Correct answer: To complete the circuit by returning current to the source

The neutral wire provides the return path for current from the load back to the source (electrical panel), completing the circuit.

Question 18: In a standard 240V residential circuit, what color is typically used for the second hot conductor?

Green
Red (Correct answer)
White
Black

Correct answer: Red

In a 240V circuit, the second ungrounded (hot) conductor is typically red, while the first hot conductor is black.

Question 19: Joist hangers are used for which of the following?

Keeping joists straight during delivery
There is no such thing as a joist hanger.
Inspection
Supporting joists against beams (Correct answer)

Correct answer: Supporting joists against beams

Joist hangers are specialized metal connectors used in construction to provide strong, secure connections between joists and supporting beams or ledgers. They cradle the end of the joist, ensuring it is properly supported and preventing it from pulling away or twisting. This is essential for maintaining the structural integrity of floors and decks.

Question 20: Which drawing in a set would you reference to determine the reinforcing steel requirements for a concrete foundation?

Architectural floor plan
Structural drawing (Correct answer)
Landscape plan
Mechanical drawing

Correct answer: Structural drawing

Structural drawings contain all information about the building's structural system including foundation details, reinforcing steel (rebar) specifications, beam sizes, column locations, and load-bearing requirements.

Question 21: When gas welding or burning, welders are required to wear tinted goggles or welding hoods with a filter lens of not less than a _____ shade.

No. 2
No. 8
No. 10
No. 4 (Correct answer)

Correct answer: No. 4

When gas welding or burning, welders are required to wear tinted goggles or welding hoods with a filter lens of not less than a No. 4 shade. This specific shade provides adequate protection against the intense light and harmful ultraviolet radiation produced during these processes. Using the correct filter lens is crucial for preventing eye damage such as arc flash or cataracts.

Question 22: If a drill bit gets stuck in the material while you're drilling, you should FIRST _______.

use the reverse switch
back the drill out of the material
unplug the drill
release the trigger switch (Correct answer)

Correct answer: release the trigger switch

If a drill bit gets stuck, the immediate priority is to stop the drill's rotation to prevent further damage to the tool or material, and to reduce the risk of injury from kickback. Releasing the trigger switch instantly cuts power to the motor, making it the safest and most immediate first step. Only after the drill has stopped can you safely assess the situation and attempt to free the bit.

Question 23: What information is typically found in the title block of a construction drawing?

Worker shift schedules and contact numbers
Material cost estimates and supplier contacts
Building inspection results and compliance certificates
Project name, drawing number, scale, date, and architect information (Correct answer)

Correct answer: Project name, drawing number, scale, date, and architect information

The title block is a standardized area on a construction drawing that contains essential reference information including the project name, drawing number, scale, revision date, and the names of the architect or engineer who prepared it.

Question 24: Before drilling through a material, always:

disconnect the power source
reinsert the chuck key
drive a nail in first
find out what is on the other side (Correct answer)

Correct answer: find out what is on the other side

Before drilling through any material, it is critically important to determine what is on the other side. This precaution prevents accidental damage to hidden electrical wires, plumbing pipes, or structural components, which could lead to costly repairs, electric shock, or other serious hazards. Always verify the area behind your drilling point.

Question 25: A wood auger bit marked 10 will drill with what diameter?

1/3 inch
10/32 inch
1 inch
5/8 inch (Correct answer)

Correct answer: 5/8 inch

Wood auger bits, particularly those in older or specific sets, are often marked in 1/16 inch increments. A mark of '10' indicates a diameter of 10/16 of an inch, which simplifies to 5/8 of an inch. This system allows for clear and consistent sizing of the bits.

Question 26: What must be included in a site-specific safety plan before construction work begins?

Only the name of the safety officer and emergency phone numbers
The project budget and timeline only
A comprehensive hazard assessment, emergency procedures, PPE requirements, and training documentation (Correct answer)
A list of all workers and their home addresses

Correct answer: A comprehensive hazard assessment, emergency procedures, PPE requirements, and training documentation

A site-specific safety plan must comprehensively address all anticipated hazards, required PPE, emergency procedures, safety training requirements, and specific controls for the work being performed.

Question 27: The speed at which stock is pushed through a saw blade is the ________.

feed rate (Correct answer)
parallel
miter
rip guide

Correct answer: feed rate

The speed at which stock (material) is pushed through a saw blade is known as the feed rate. Adjusting the feed rate is essential for efficient cutting, preventing the blade from binding, and achieving a clean cut without overheating the blade or motor. An appropriate feed rate ensures optimal performance and safety.

Question 28: Discrimination towards an individual based on race, sex, religion, cultural issues, or language barriers is known as _______.

conflict
abuse
harassment (Correct answer)
derogatory conduct

Correct answer: harassment

Discrimination towards an individual based on protected characteristics like race, sex, religion, cultural issues, or language barriers is legally and ethically defined as harassment. Harassment creates a hostile work environment and is unacceptable, violating workplace policies and often anti-discrimination laws. It undermines respect and equality in the workplace.

Question 29: Use only a bandsaw that has a ______.

stop (Correct answer)
breastplate with a broad surface
thick, three-piece blade
battery pack

Correct answer: stop

When using a bandsaw, it is important to use one that has a stop, often referring to a material stop or fence. This stop helps to hold the workpiece securely against the table and guide it consistently through the blade, preventing kickback and ensuring precise, repeatable cuts for safer operation.

Question 30: Each of the following would be considered company-confidential except ______.

a contract bid
your company's address (Correct answer)
employee salaries
your company's strategic plan

Correct answer: your company's address

Company-confidential information typically includes sensitive data like employee salaries, strategic plans, and contract bids, which could harm the business if disclosed. Your company's address, however, is generally public information, necessary for business operations, deliveries, and customer contact. It is not considered confidential in the same way as proprietary or internal financial data.

Question 31: Your personal fall arrest system should be inspected monthly by a(n) _____.

competent person (Correct answer)
project manager
state safety inspector
OSHA safety inspector

Correct answer: competent person

Your personal fall arrest system should be inspected monthly by a competent person. A competent person is defined by OSHA as someone capable of identifying existing and predictable hazards and who has authorization to take prompt corrective measures. Regular inspections by such an individual ensure the system's integrity, proper function, and overall safety.

Question 32: On a site plan, what do contour lines represent?

Planned landscaping areas
Property boundary markers
Lines of equal elevation showing the terrain's shape (Correct answer)
Underground utility routes

Correct answer: Lines of equal elevation showing the terrain's shape

Contour lines connect points of equal elevation on a site plan, showing the shape and slope of the terrain. Closely spaced contour lines indicate steep slopes, while widely spaced lines indicate gentle grades.

Question 33: What is the standard nominal voltage for most residential branch circuits in the United States?

240 volts
110 volts
120 volts (Correct answer)
480 volts

Correct answer: 120 volts

Standard US residential branch circuits operate at 120 volts nominal, which is what you measure at a typical wall outlet.

Question 34: What minimum safe distance must unqualified workers maintain from overhead power lines up to 50kV, per OSHA 1926.416?

5 feet
20 feet
10 feet (Correct answer)
15 feet

Correct answer: 10 feet

OSHA 1926.416 requires unqualified workers to stay at least 10 feet away from overhead power lines energized up to 50kV.

Question 35: What is the primary purpose of critical thinking in a construction environment?

To memorize building codes without understanding them
To avoid asking questions about unfamiliar procedures
To evaluate situations and make informed decisions that solve problems (Correct answer)
To challenge the authority of supervisors

Correct answer: To evaluate situations and make informed decisions that solve problems

Critical thinking enables construction workers to evaluate situations, consider potential outcomes, and make informed decisions that lead to effective problem-solving on the job site.

Question 36: The path a saw blade cuts in a piece of wood is called:

Waste
Clearance
Set
Kerf (Correct answer)

Correct answer: Kerf

The 'kerf' refers to the width of the cut made by a saw blade in a piece of wood or other material. It is the material removed by the saw teeth as they pass through the workpiece. Understanding the kerf is important for accurate measurements and cuts, as it accounts for the material lost during sawing.

Question 37: On power tools, you should never engage the _____.

trigger lock (Correct answer)
locking spring
booster
bit shank

Correct answer: trigger lock

On power tools, you should never engage the trigger lock unless specifically instructed for a particular operation and with extreme caution. The trigger lock keeps the tool running continuously without the user holding the trigger, removing immediate control over stopping the tool. This significantly increases the risk of accidents or loss of control, making it a major safety hazard.

Question 38: The smallest mark on an imperial ruler is:

Millimeter
1/16 inch (Correct answer)
1/4 inch
1/2 inch

Correct answer: 1/16 inch

On a standard imperial ruler, the smallest common increment marked is 1/16 of an inch. These fine divisions allow for precise measurements in construction and woodworking. While some specialized rulers might have smaller markings, 1/16 inch is the most common smallest unit for general use.

Question 39: One of the most common barriers to problem-solving is _______.

lack of motivation
closed-mindedness (Correct answer)
inability to communicate well
fear of failure

Correct answer: closed-mindedness

Closed-mindedness is a significant barrier to effective problem-solving because it prevents individuals from considering new ideas, alternative solutions, or different perspectives. When someone is unwilling to entertain possibilities outside their existing beliefs, they limit their ability to innovate and find optimal resolutions. Overcoming this requires an open and flexible mindset.

Question 40: A statement that explains how a company does business is called a(n) _______.

reference
company philosophy
mission statement (Correct answer)
employee handbook

Correct answer: mission statement

A mission statement is a concise declaration that explains a company's purpose, its core values, and how it conducts business. It defines the organization's reason for existence and its primary objectives, guiding its operations and decision-making. This statement serves as a foundational principle for employees and stakeholders alike.

Question 41: If a Code of Federal Regulations Standard does not specifically address a workplace hazard, which of the following must be invoked?

The Code of Construction Safety
The Workplace Safety and Insurance Act
The general duty clause (Correct answer)
The Worker's Safety Act of 1984

Correct answer: The general duty clause

If a Code of Federal Regulations Standard (like OSHA standards) does not specifically address a workplace hazard, the General Duty Clause of the OSH Act must be invoked. This clause requires employers to provide a workplace free from recognized hazards that are causing or are likely to cause death or serious physical harm to employees. It acts as a catch-all to ensure worker safety even when specific regulations are absent.

Question 42: The adjustable tool rest on a bench grinder should be positioned ___ inch from the wheel.

1/2
1/4
1/8 (Correct answer)
3/4

Correct answer: 1/8

On a bench grinder, the adjustable tool rest must be positioned no more than 1/8 inch from the grinding wheel. This small gap is a critical safety measure that prevents the workpiece from being jammed between the rest and the wheel, which could cause kickback, damage the workpiece, or lead to serious injury.

Question 43: Which type of construction drawing shows the exterior appearance of a building from a specific side?

Section
Detail drawing
Elevation (Correct answer)
Floor plan

Correct answer: Elevation

Elevations are orthographic drawings that show the exterior appearance of a building as viewed from a specific direction — typically labeled as north, south, east, and west elevations.

Question 44: Before you start drilling, make sure the drill bit is ______.

properly oiled
tightened in the chuck (Correct answer)
grounded
double-insulated

Correct answer: tightened in the chuck

Before drilling, it is crucial to ensure the drill bit is securely tightened in the chuck. A loose bit can fly out during operation, causing serious injury or damage to the workpiece. Proper tightening ensures stability, accuracy, and safe operation of the drill.

Question 45: Kickback occurs with a table saw when the ______ kicks back.

table
worker
material or stock (Correct answer)
saw

Correct answer: material or stock

Kickback on a table saw refers to the dangerous event where the workpiece, or 'material/stock,' is suddenly and forcefully thrown back towards the operator. This usually happens when the material binds between the blade and the fence, or when the blade pinches the wood. It is a serious hazard that can cause severe injury.

Question 46: Which document outlines the specific duties and qualifications required for a construction position?

Building permit
Change order
Job description (Correct answer)
Safety Data Sheet

Correct answer: Job description

A job description details the duties, responsibilities, qualifications, and expectations for a specific position, helping workers understand what is required.

Question 47: Critical thinking is the process of _____.

distrusting new ideas
searching for jobs, then applying and interviewing
evaluating information, then reaching a conclusion or making a decision (Correct answer)
evaluating the need, then developing business and marketing plans

Correct answer: evaluating information, then reaching a conclusion or making a decision

Critical thinking is a systematic process that involves objectively analyzing and evaluating information, arguments, and evidence to form a reasoned judgment or make an informed decision. It goes beyond simply accepting information at face value, encouraging deeper analysis and thoughtful consideration of various perspectives. This process is vital for effective problem-solving and decision-making in any field.

Question 48: What should a worker do first upon discovering an unlabeled container of liquid at a construction site?

Pour the liquid into a labeled container
Assume it is water and continue working
Open the container and smell the contents to identify them
Do not use the material and report it to the supervisor immediately (Correct answer)

Correct answer: Do not use the material and report it to the supervisor immediately

Unlabeled containers must not be used. Workers should leave the container undisturbed and immediately notify their supervisor so the contents can be properly identified and handled.

Question 49: The ____ on a circular saw is a metal guide that slips into slots in the saw's baseplate.

miter
feedrate
rip guide (Correct answer)
parallel

Correct answer: rip guide

The rip guide on a circular saw is a metal guide that slips into slots in the saw's baseplate. Its purpose is to maintain a consistent distance from the blade to the edge of the material being cut. This ensures straight and accurate rip cuts, which are cuts made parallel to the grain of the wood.

Question 50: What is the minimum working clearance required in front of an electrical panel operating at 0–150 volts to ground, per NEC 110.26?

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

Correct answer: 36 inches

NEC 110.26 requires a minimum of 36 inches of clear working space in front of electrical equipment for voltages of 0–150V to ground.

Question 51: The activity that consists of breaking a job into its component tasks and then analyzing each step for potential hazards is called a _____.

job safety analysis (Correct answer)
hazardous incident simulation
safety pre-assessment
safety breakdown structure

Correct answer: job safety analysis

The activity that consists of breaking a job into its component tasks and then analyzing each step for potential hazards is called a job safety analysis (JSA). A JSA identifies hazards, assesses risks, and determines the safest way to perform each task. This systematic approach helps prevent accidents and injuries by proactively addressing potential dangers before work begins.

Question 52: Which type of circuit provides only one path for current to flow through all components?

Bridge circuit
Parallel circuit
Series circuit (Correct answer)
Combination circuit

Correct answer: Series circuit

In a series circuit, components are connected end-to-end in a single loop, providing only one path for current flow.

Question 53: When nailing 2x6 inch joists, what nail should be used?

18 d
12 d (Correct answer)
All of the above can be used.
20 d

Correct answer: 12 d

For fastening 2x6 inch joists, a 12d (12-penny) nail is typically the appropriate size. The 'd' refers to the penny system, which historically indicated nail length. A 12d nail is long enough to provide sufficient penetration and holding power when joining two pieces of dimensional lumber like 2x6s, ensuring a strong structural connection.

Question 54: What does the abbreviation 'O.C.' mean on a construction drawing?

On center — the distance measured from the center of one member to the center of the next (Correct answer)
Original construction
Outside corner
Open circuit

Correct answer: On center — the distance measured from the center of one member to the center of the next

O.C. stands for 'on center,' indicating that the specified dimension is measured from the center of one structural member to the center of the adjacent member.

Question 55: Which of the following drawing types primarily focuses on the building's strength, stability, and the materials required for its framework, such as foundations, beams, and columns?

Structural Drawings (Correct answer)
Architectural Drawings
Plumbing Drawings
Mechanical Drawings

Correct answer: Structural Drawings

Structural drawings are created by engineers and provide detailed information about the building's framework and load-bearing components. They focus on ensuring the strength and stability of the structure, specifying details for foundations, columns, beams, and connections.

Question 56: Which is not a rule for laying out stairs?

The product obtained by multiplying one rise height by the tread width should be between 70 and 75 inches.
The sum of one riser and one tread should be between 17 and 18 inches.
The sum of the two risers is always the same.
The number of treads and risers is always the same. (Correct answer)

Correct answer: The number of treads and risers is always the same.

When laying out stairs, the number of treads is always one less than the number of risers. For example, if you have 10 risers, you will have 9 treads. This is because the top landing serves as the final 'tread' for the last step. The other options represent common rules or guidelines for comfortable and safe stair design.

Question 57: What is PL-400?

Number of teeth on a hacksaw
Type of construction adhesive (Correct answer)
Drill bit size
Plywood specification

Correct answer: Type of construction adhesive

PL-400 is a well-known brand and type of heavy-duty construction adhesive. It is widely used in building for bonding various materials, including wood, concrete, and metal, providing a strong and durable hold. Its specific formulation makes it suitable for demanding construction applications.

Question 58: What does GFCI stand for in electrical work?

Ground Flow Current Interrupter
Ground Fault Current Indicator
General Fault Circuit Interrupter
Ground Fault Circuit Interrupter (Correct answer)

Correct answer: Ground Fault Circuit Interrupter

GFCI stands for Ground Fault Circuit Interrupter, a device that detects ground faults and cuts power to prevent electrical shock.

Question 59: What is the purpose of a detail drawing in a construction drawing set?

To list all materials needed for the entire project
To provide a bird's-eye view of the entire project site
To display the construction timeline and milestones
To show a small, specific area at an enlarged scale with precise construction information (Correct answer)

Correct answer: To show a small, specific area at an enlarged scale with precise construction information

Detail drawings zoom in on a small area of the building at a much larger scale to show precise construction methods, material connections, and dimensions that cannot be clearly shown on the general drawings.

Question 60: A person who is capable of identifying existing and predictable hazards and has authorization to take prompt corrective measures to eliminate such hazards is a _____ person.

competent (Correct answer)
proficient
qualified
eligible

Correct answer: competent

A 'competent person' is defined by OSHA as someone capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. This designation is crucial in construction and other industries for ensuring on-site safety and compliance.

Question 61: What is an as-built drawing?

A drawing used only for estimating material costs
A conceptual rendering showing the finished building's appearance
A preliminary sketch made before construction begins
A drawing that documents the actual constructed conditions including any deviations from the original plans (Correct answer)

Correct answer: A drawing that documents the actual constructed conditions including any deviations from the original plans

As-built drawings (also called record drawings) document the actual conditions of the completed construction, including all changes, modifications, and deviations from the original design drawings.

Question 62: Before plugging a saw into a power source, make sure the:

power switch is in the OFF position (Correct answer)
power switch is in the ON position
lower blade guard has been removed
blade has been loosened

Correct answer: power switch is in the OFF position

Before plugging a saw into a power source, it is a critical safety practice to ensure the power switch is in the OFF position. This prevents the saw from unexpectedly starting up immediately upon connection, which could cause serious injury or damage. Always verify the switch position before connecting power.

Question 63: Which instrument is used to measure electrical current flowing through a circuit?

Voltmeter
Ammeter (Correct answer)
Wattmeter
Ohmmeter

Correct answer: Ammeter

An ammeter measures electrical current in amperes and must be connected in series with the circuit being tested.

Question 64: When welding, what color is the oxygen hose?

Red
Gray
Green (Correct answer)
Yellow

Correct answer: Green

When welding, the oxygen hose is typically green. This color coding is a standard safety practice to easily identify the gas being supplied, preventing accidental connections or misuse. The acetylene hose, for comparison, is usually red, ensuring clear differentiation between the two gases.

Question 65: What does a section line with arrows on a floor plan indicate?

The location and viewing direction of a cross-section cut through the building (Correct answer)
The direction of prevailing winds
The direction of water drainage
The path for emergency evacuation

Correct answer: The location and viewing direction of a cross-section cut through the building

Section lines with arrows indicate where an imaginary cut has been made through the building, and the arrows show the direction the viewer is looking at the cut section.

Question 66: What is the purpose of a bonding jumper in an electrical system?

To increase available voltage
To step down voltage at the service entrance
To reduce current in branch circuits
To ensure electrical continuity between metal parts for safe fault current flow (Correct answer)

Correct answer: To ensure electrical continuity between metal parts for safe fault current flow

A bonding jumper connects metal parts of an electrical system to ensure continuity and allow fault current to travel safely back to the source.

Question 67: What is the primary purpose of a Job Safety Analysis (JSA)?

To calculate the cost of safety equipment for a project
To determine which workers should be assigned to specific tasks
To document completed safety training for regulatory compliance
To break down a job into steps and identify potential hazards at each step (Correct answer)

Correct answer: To break down a job into steps and identify potential hazards at each step

A Job Safety Analysis systematically breaks down a task into individual steps and identifies the potential hazards associated with each step, along with controls to mitigate those hazards.

Question 68: Some manufacturers suggest that each time you use a pneumatic nailer, the air inlet needs ____.

a shot of compressed air to clear any dust
a few drops of water
a few drops of oil (Correct answer)
to be cleaned with a small wire brush

Correct answer: a few drops of oil

Pneumatic nailers, like many air tools, require lubrication to maintain their internal components and ensure smooth operation. Adding a few drops of oil to the air inlet before each use helps to lubricate the moving parts, preventing wear, corrosion, and ensuring the tool functions efficiently and reliably over time.

Question 69: Portable belt sanders are continuous-loop abrasive belts stretched between two ______.

dowels
springs
drums (Correct answer)
wheels

Correct answer: drums

Portable belt sanders utilize a continuous loop of abrasive material, known as a sanding belt, which is stretched and rotated between two drums. These drums drive the belt, allowing for efficient material removal and surface finishing across various applications. The drums are fundamental to the sander's operation.

Question 70: A dashed line on a floor plan typically represents an object or feature that is:

the central axis of a symmetrical object.
a visible, primary outline.
hidden from view in that specific plan. (Correct answer)
to be demolished.

Correct answer: hidden from view in that specific plan.

Dashed lines, often called hidden lines, are used on construction drawings to indicate edges or features that are not visible from the current viewpoint. For example, on a floor plan, they might show a beam in the ceiling above or a foundation element below.

Question 71: What type of hammer is commonly selected for trim work?

16-ounce wood handle curved claw (Correct answer)
28-ounce long handle waffle-head
Framing hatchet
20-ounce long handle straight claw

Correct answer: 16-ounce wood handle curved claw

A 16-ounce wood handle curved claw hammer is a versatile and commonly preferred tool for trim work. Its lighter weight allows for more control and less fatigue during delicate tasks, while the curved claw is excellent for carefully prying and removing nails without damaging finished surfaces. This makes it ideal for precision and finishing applications.

Question 72: If a pneumatic nailer is not firing properly, before you attempt repairs you must _______.

adjust the compressor
remove the booster
disconnect the air hose (Correct answer)
adjust the regulator

Correct answer: disconnect the air hose

Before attempting any repairs or adjustments on a pneumatic nailer, it is crucial to disconnect its power source to prevent accidental firing. For pneumatic tools, the power source is the compressed air supply. Disconnecting the air hose ensures that no air can reach the tool, rendering it inoperable and safe to handle for maintenance.

Question 73: While reviewing a set of blueprints, you need to find information such as the project name, architect's contact information, drawing scale, and the date of the last revision. In which part of the drawing would you find this information consolidated?

Title Block (Correct answer)
Drawing Index
General Notes
Legend

Correct answer: Title Block

The title block, typically located in the bottom right corner of every drawing sheet, contains essential project information. This includes the project name and location, architect/engineer details, the drawing scale, revision history, sheet title, and sheet number.

Question 74: When performing overhead work on scaffolding, what protective measures must be taken to prevent falling objects from striking a person below?

Toeboards, debris nets, or canopies (Correct answer)
Alarm systems
Fall arrest system
Warning tags on the scaffold

Correct answer: Toeboards, debris nets, or canopies

When performing overhead work on scaffolding, protective measures like toeboards, debris nets, or canopies are essential to prevent falling objects from striking people below. Toeboards prevent small items from being kicked off, while debris nets and canopies catch larger falling objects. These measures are critical for maintaining a safe work environment and protecting workers on lower levels.

Question 75: To prevent electric shock, only use tools that have proper:

chuck key
ground fault protection (Correct answer)
220 voltage
electric tape

Correct answer: ground fault protection

To prevent electric shock, it is essential to use tools that have proper ground fault protection, such as a Ground Fault Circuit Interrupter (GFCI). A GFCI quickly detects imbalances in electrical current, indicating a ground fault, and immediately shuts off power, protecting users from electrocution, especially in damp or hazardous conditions.

Question 76: Prolonged exposure to asbestos can cause lung cancer, asbestosis, and _____.

mesothelioma (Correct answer)
pneumonia
black lung
emphysema

Correct answer: mesothelioma

Prolonged exposure to asbestos can cause several severe health conditions, including lung cancer, asbestosis, and mesothelioma. Mesothelioma is a rare and aggressive cancer that affects the lining of the lungs, abdomen, or heart, and is almost exclusively caused by asbestos exposure. It is a particularly dangerous and often fatal disease.

Question 77: Never use a circular saw without a lower blade guard because the:

guard protects you from the blade and falling particles (Correct answer)
wood will split
trigger lock won't work
saw blade may fall off

Correct answer: guard protects you from the blade and falling particles

The lower blade guard on a circular saw is a critical safety feature. Its primary purpose is to cover the exposed part of the blade when the saw is not cutting, preventing accidental contact with the spinning blade. Additionally, it helps to contain sawdust and other debris that can be ejected during cutting, protecting the operator from flying particles.

Question 78: A Porta-Power is an example of a(n) ____ tool.

electric
pneumatic
hydraulic (Correct answer)
battery

Correct answer: hydraulic

A Porta-Power is a well-known brand name for a portable hydraulic ram and pump system. These tools utilize hydraulic fluid under pressure to generate immense force, making them ideal for tasks requiring powerful pushing, spreading, or lifting, such as in auto body repair or heavy equipment maintenance.

Question 79: To prevent ear infections, clean your earplugs regularly with:

soap and water (Correct answer)
alcohol
a soft cloth
mineral spirits

Correct answer: soap and water

To prevent ear infections and maintain hygiene, earplugs should be cleaned regularly with soap and water. This simple method effectively removes dirt, wax, and bacteria that can accumulate on the earplugs during use. Proper cleaning ensures their effectiveness and prevents potential health issues associated with dirty ear protection.

Question 80: The first-aid procedure to treat a co-worker who has been splattered with muriatic acid is found in the:

MSDS (Correct answer)
OSHA standards
health insurance benefits manual
employee policies manual

Correct answer: MSDS

The Material Safety Data Sheet (MSDS), now often referred to as a Safety Data Sheet (SDS), provides comprehensive information about hazardous substances. It details the chemical's properties, hazards, safe handling procedures, and crucial first-aid measures for exposure, such as what to do if muriatic acid splatters on skin. This document is essential for workplace safety and emergency response, ensuring proper treatment.

Question 81: Saws with fine blades that are excellent for delicate and intricate cutting are called ______ saws.

worm-drive
circular
reciprocating
saber (Correct answer)

Correct answer: saber

Saber saws, commonly known as jigsaws, are characterized by their fine, narrow blades and reciprocating cutting action. This design allows them to make intricate and curved cuts with precision, making them excellent for delicate work and shaping various materials where a straight cut is not desired.

Question 82: What does professionalism in the construction industry primarily involve?

Working independently without communicating with the team
Demonstrating reliability, respect, and a strong work ethic (Correct answer)
Arriving early but leaving before the shift ends
Wearing the most expensive safety equipment available

Correct answer: Demonstrating reliability, respect, and a strong work ethic

Professionalism is demonstrated through consistent reliability, respectful interactions with coworkers and supervisors, and maintaining a strong work ethic throughout the workday.

Question 83: Getting along with co-workers and thinking critically are examples of _____ skills.

personal
behavioral
interpersonal (Correct answer)
technical

Correct answer: interpersonal

Getting along with co-workers and thinking critically are examples of interpersonal skills. Interpersonal skills refer to the abilities needed to interact effectively with others, including communication, collaboration, and conflict resolution. While critical thinking is a cognitive skill, applying it in a team setting often requires strong interpersonal communication to share ideas and reach consensus.

Question 84: Printed text or pictures can be copied into an electronic format using a _____.

plotter
hard drive
scanner (Correct answer)
monitor

Correct answer: scanner

A scanner is a device specifically designed to convert physical documents, images, or text into a digital format that can be stored, edited, and shared electronically. It works by optically reading the printed material and creating a digital representation. This technology is essential for digitizing records and integrating physical information into computer systems.

Question 85: What is the correct sequence of steps for lockout/tagout (LOTO) before working on electrical equipment?

Wear rubber gloves and test with a voltage meter before proceeding
Turn off the main breaker and post a warning sign
Notify coworkers, wear PPE, and begin work
De-energize, lock out the energy source, tag it, and verify zero energy state (Correct answer)

Correct answer: De-energize, lock out the energy source, tag it, and verify zero energy state

Proper LOTO requires de-energizing the equipment, applying a lockout device, attaching a warning tag, and verifying zero energy before work begins.

Question 86: What is the purpose of a drawing schedule in a construction document set?

To provide a table listing specifications for repetitive elements like doors, windows, or finishes (Correct answer)
To document material delivery dates
To set the construction timeline and worker shifts
To list the order in which drawings should be reviewed

Correct answer: To provide a table listing specifications for repetitive elements like doors, windows, or finishes

Drawing schedules are tabular formats that organize specifications for repetitive building elements such as doors, windows, room finishes, and fixtures, using reference symbols keyed to the floor plans.

Question 87: A pneumatic drill is used ____.

when there is no source of electricity (Correct answer)
for intricate work
to supply compressed air to clean the inside of pipes
for work too heavy for an electric drill

Correct answer: when there is no source of electricity

A pneumatic drill operates using compressed air, rather than electricity. This makes it an ideal tool for use in environments where electrical power is unavailable or where the presence of electricity could pose a hazard, such as in wet conditions or areas with flammable materials. Pneumatic tools offer a safe and powerful alternative in such situations.

Question 88: Which of the following data is included on a material safety data sheet for a hazardous shipment?

How to contact the manufacturer of the substance (Correct answer)
Manufacturer's recommended product substitutes
Net weight criteria for packaging the container
The expiration date of the substance

Correct answer: How to contact the manufacturer of the substance

A Material Safety Data Sheet (MSDS), now often called a Safety Data Sheet (SDS), includes crucial information about hazardous substances, such as emergency procedures, handling precautions, and physical/chemical properties. Importantly, it also provides contact information for the manufacturer or importer. This ensures users can obtain further information or assistance if needed, promoting accountability and access to expert knowledge.

Question 89: Which of the following is NOT a good safety practice when working with power tools?

Follow instructions in the user's manual
Secure work with clamps or a vise
Always keep your finger on the switch button while carrying a power tool (Correct answer)
Remove damaged tools from the work area

Correct answer: Always keep your finger on the switch button while carrying a power tool

Keeping your finger on the switch button while carrying a power tool is a dangerous practice because it can lead to accidental activation. An unexpected start-up can cause serious injury to yourself or others, or damage to the tool or workpiece. Always ensure the switch is off and your finger is away from the trigger when transporting tools.

Question 90: When is it necessary to use a full-body harness and lanyard on a construction site?

When working at heights of 6 feet or more above a lower level in general construction (Correct answer)
Whenever working outdoors
Only when working on roofs steeper than 8/12 pitch
When carrying tools weighing more than 25 pounds

Correct answer: When working at heights of 6 feet or more above a lower level in general construction

OSHA requires fall protection, including personal fall arrest systems like harnesses and lanyards, when construction workers are exposed to falls of 6 feet or more to a lower level.

Question 91: A personal fall arrest system (PFAS) includes a full-body harness, a lanyard, and an anchor point. For the system to function correctly during a fall, where should the D-ring on the full-body harness be positioned?

At the waist, near the hip
On the lower back
Centered on the chest
In the middle of the back, between the shoulder blades (Correct answer)

Correct answer: In the middle of the back, between the shoulder blades

The D-ring on a full-body harness must be positioned in the center of the worker's back, between the shoulder blades. This placement ensures that in the event of a fall, the forces are distributed evenly across the body and the worker is kept in an upright position.

Question 92: The first step to solving job-related problems is to _______.

choose a solution
analyze and explore alternatives
monitor the problem
define the problem (Correct answer)

Correct answer: define the problem

The very first step in effectively solving any job-related problem is to clearly and accurately define what the problem is. Without a precise understanding of the issue, any attempts to find solutions will be misdirected or ineffective. Defining the problem ensures that efforts are focused on the root cause rather than just symptoms.

Question 93: What saw would be used to cut a 2x4?

Band saw
Table saw
Saber saw
Circular saw (Correct answer)

Correct answer: Circular saw

A circular saw is a highly versatile and commonly used power tool for cutting dimensional lumber like a 2x4. It is efficient for making straight cuts across the grain (crosscuts) or along the grain (rip cuts) and is portable, making it suitable for various construction tasks on a job site.

Question 94: Anything that could have caused an injury or damage, but did not because it was caught in time, is referred to as an _____.

injury
intentional act
incident (Correct answer)
accident

Correct answer: incident

Anything that could have caused an injury or damage but did not because it was caught in time is referred to as an incident, often called a 'near miss.' Recognizing and reporting incidents is crucial for workplace safety, as it allows for investigation and corrective actions to prevent actual accidents from occurring in the future. It highlights potential hazards before they lead to harm.

Question 95: A system that protects workers from hazardous energy while they work with machines and equipment is referred to as _____.

an energy-neutral system
lockout/tagout (Correct answer)
a disconnect
a barricade system

Correct answer: lockout/tagout

Lockout/tagout (LOTO) is a safety procedure used to ensure that dangerous machines are properly shut off and not able to be started up again prior to the completion of maintenance or servicing work. It protects workers from hazardous energy by physically locking and tagging energy-isolating devices, preventing accidental energization or release of stored energy. This system is critical for preventing serious injuries or fatalities during machine servicing.

Question 96: A measure of the probability, consequences, and exposure related to an event is referred to as _____.

safety
risk (Correct answer)
evaluation
hazard

Correct answer: risk

A measure of the probability, consequences, and exposure related to an event is referred to as risk. In safety management, risk assessment involves evaluating the likelihood of a hazard causing harm and the severity of that harm. Understanding risk allows for the implementation of appropriate control measures to minimize potential negative outcomes and improve safety.

Question 97: What tool is used to drive a three-inch screw?

Screwdriver
Hammer
Wrench
Cordless drill (Correct answer)

Correct answer: Cordless drill

A cordless drill, equipped with the appropriate driver bit, is the best tool for driving a three-inch screw. Its powerful motor and adjustable torque settings allow it to drive long screws quickly and efficiently into various materials without stripping the screw head or fatiguing the user. A manual screwdriver would be impractical and much slower for such a task.

Question 98: What tool is best used for shaping wood?

Circular saw
Router (Correct answer)
Miter saw
Drill

Correct answer: Router

A router is a versatile power tool primarily used for shaping wood. It can create decorative edges, cut grooves, dadoes, rabbets, and perform intricate joinery. By using different router bits, a wide variety of profiles and cuts can be achieved, making it indispensable for custom woodworking and finishing tasks.

Question 99: What is the primary function of a transformer in an electrical distribution system?

To change voltage levels using electromagnetic induction (Correct answer)
To store electrical energy for later use
To protect circuits from overcurrent
To convert AC power to DC power

Correct answer: To change voltage levels using electromagnetic induction

A transformer uses electromagnetic induction between primary and secondary windings to step voltage up or down as needed.

Question 100: Keep the drill's air vent clean with a _______.

small brush or stick (Correct answer)
drill bit
chuck key
hand-held vacuum cleaner

Correct answer: small brush or stick

The air vents on a drill are essential for cooling the motor during operation. Keeping these vents clean with a small brush or stick prevents dust and debris from accumulating, which could obstruct airflow. Blocked vents can lead to motor overheating and potential damage to the tool, reducing its lifespan and performance.

NCCER Core Curriculum Exam

This exam certifies individuals in fundamental construction skills, safety, and knowledge essential for entry-level craft professionals.

100

Questions

120 min

Time Limit

70%

To Pass

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