CET CET Machine Room & Pit Equipment 2

Question 1

What is the purpose of the terminal stopping device (final limit switch) in a traction elevator?

Accepted Answer

Stops the car if it passes beyond normal travel limits

Answer

Terminal stopping devices (final limits) are safety switches that cut power if the car travels beyond the normal upper or lower terminal landings.

Question 2

What machine room component controls the starting, stopping, and speed of a traction elevator motor?

Accepted Answer

The controller

Answer

The elevator controller is the brain of the system, managing motor starting and stopping, speed regulation, floor selection, and safety circuit monitoring.

Question 3

What does the term 'rope equalizer' refer to in an elevator machine room?

Accepted Answer

A device that evenly distributes tension across all hoist ropes

Answer

A rope equalizer distributes the load evenly among all hoist ropes to prevent individual ropes from being overloaded due to unequal tension.

Question 4

Which standard governs the design and installation requirements for elevator machine rooms in the United States?

Accepted Answer

ASME A17.1/CSA B44

Answer

ASME A17.1/CSA B44 is the Safety Code for Elevators and Escalators and is the primary standard governing machine room design and equipment in the US.

Question 5

What minimum temperature must be maintained in an elevator machine room to protect electrical and mechanical components?

Accepted Answer

50°F (10°C)

Answer

ASME A17.1 requires machine room temperatures to be maintained above 50°F (10°C) to protect lubricants, electrical components, and control systems.

(CET) Certified Elevator Technician Practice Test

(CET) Certified Elevator Technician Practice Test

CET CET Machine Room & Pit Equipment 2