QEI Doors, Gates, and Entrances 2

Question 1

What is the maximum kinetic energy limit for a power-operated car or hoistway door moving in the closing direction per ASME A17.1?

Accepted Answer

7 ft-lb

Answer

ASME A17.1 limits the kinetic energy of closing doors to 7 ft-lb (9.5 J) to minimize injury potential when a passenger is struck by a closing door panel.

Question 2

What is the function of a car door restrictor (car door restriction device)?

Accepted Answer

To prevent the car door from opening more than a few inches when the car is not within the landing zone

Answer

A car door restrictor prevents the car door from opening more than approximately 4 inches when the car is outside the landing zone, protecting passengers inside the car from falling into the hoistway.

Question 3

When inspecting power-operated landing doors, what key safety parameters must the inspector assess?

Accepted Answer

Kinetic energy and average closing force compliance with code-specified limits

Answer

The inspector must verify that door kinetic energy and average closing force remain within ASME A17.1 limits, as these parameters determine the injury potential from door contact during closing.

Question 4

What is the 'unlocking zone' as it relates to hoistway door interlocks?

Accepted Answer

The vertical zone above and below a landing within which the hoistway door interlock can be released

Answer

The unlocking zone is the vertical range above and below each landing floor within which the hoistway door interlock can be released, permitting door opening as the car approaches or slightly departs from the floor.

Question 5

Which component on the car door physically engages with the landing door mechanism when the car arrives at a floor?

Accepted Answer

Car door vane or clutch pick

Answer

The car door vane (or clutch pick) projects outward from the car door and engages with a roller on the landing door interlock assembly when the car arrives at a floor, transferring motion from the car operator to the hoistway door.

QEI - Qualified Elevator Inspector Practice Test

QEI - Qualified Elevator Inspector Practice Test

QEI Doors, Gates, and Entrances 2