CET Governor & Overspeed Protection 2

Question 1

What ASME A17.1 code section governs governor tripping speeds for traction elevators?

Accepted Answer

Section 2.18

Answer

ASME A17.1 Section 2.18 specifies the requirements for governor tripping speeds on traction elevators.

Question 2

On a dual-overspeed governor, the first tripping speed typically activates the:

Accepted Answer

Emergency stop switch

Answer

The first (lower) tripping speed on a dual-overspeed governor activates the emergency stop switch to cut power and apply the brake.

Question 3

Which type of governor rope is required for use with elevator governors per ASME A17.1?

Accepted Answer

Independent wire rope core (IWRC)

Answer

ASME A17.1 requires independent wire rope core (IWRC) governor ropes for their superior strength and resistance to crushing.

Question 4

What happens to the governor rope tension when the car overspeeds and the governor trips?

Accepted Answer

Tension increases as the rope is gripped

Answer

When the governor trips and grips the rope, tension in the governor rope increases, pulling the safety linkage to engage the car safeties.

Question 5

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

Accepted Answer

Safeties engaging during normal operation

Answer

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

(CET) Certified Elevator Technician Practice Test