CET Maintenance, Inspection & Troubleshooting 2

Question 1

During a periodic inspection, an elevator's safeties fail to engage during a drop test. What is the FIRST corrective action?

Accepted Answer

Take the elevator out of service immediately

Answer

A failed safety drop test is a critical failure requiring immediate removal from service until the fault is diagnosed and corrected.

Question 2

A hydraulic elevator exhibits slow leveling at the top floor but normal leveling elsewhere. The MOST likely cause is:

Accepted Answer

Excessive pressure at the top of the cylinder stroke

Answer

Near the top of cylinder travel, fluid flow resistance increases, causing sluggish leveling; adjusting the deceleration valve corrects this.

Question 3

What does the term 'car sill gap' refer to in elevator inspection?

Accepted Answer

The horizontal gap between the car sill and landing sill

Answer

The car sill gap is the horizontal space between the car sill and the hoistway landing sill, which must not exceed code limits to prevent entrapment.

Question 4

Which test verifies that an elevator cannot be driven beyond the terminal landings under normal operation?

Accepted Answer

Normal terminal stopping device test

Answer

Normal terminal stopping devices (slowdown switches) must stop the car at or before the terminal landings under normal operating conditions.

Question 5

An elevator repeatedly trips its thermal overload relay. After resetting, the problem recurs within minutes. The BEST next step is to:

Accepted Answer

Check motor current draw and compare to nameplate amperage

Answer

Recurring thermal overloads indicate excessive current draw; measuring actual motor amperage versus nameplate rating identifies the root cause.

(CET) Certified Elevator Technician Practice Test