CET Governor & Overspeed Protection 3

Question 1

What is the purpose of the governor rope tension device (tensioning sheave)?

Accepted Answer

To maintain proper rope tension and prevent slack

Answer

The governor rope tensioning sheave keeps the rope taut so the governor can accurately sense car speed and grip the rope when tripping.

Question 2

Which condition would require immediate replacement of a governor rope?

Accepted Answer

Six broken wires in one lay length

Answer

ASME A17.1 requires governor rope replacement when six or more broken wires are found in one lay length of the rope.

Question 3

What is the minimum factor of safety required for a governor rope under ASME A17.1?

Accepted Answer

10

Answer

ASME A17.1 requires a minimum factor of safety of 10 for governor ropes based on breaking strength versus maximum rope load.

Question 4

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

Accepted Answer

Jaws or gripper

Answer

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

Question 5

A governor that has been tripped during a safety test must be manually reset before returning the elevator to service because:

Accepted Answer

The gripper jaws remain locked on the rope until manually released

Answer

After a governor trip, the jaw mechanism remains engaged and must be manually reset to release the governor rope and allow elevator operation.

(CET) Certified Elevator Technician Practice Test