QEI Doors, Gates, and Entrances

Question 1

What is the primary purpose of a hoistway door interlock?

Accepted Answer

To prevent the hoistway door from being opened unless the car is within the unlocking zone

Answer

To control door closing speed

Answer

To connect the car door to the hoistway door mechanically

Answer

To provide emergency lighting at each landing

Question 2

What is the maximum average closing force permitted for power-operated hoistway doors per ASME A17.1?

Accepted Answer

30 lbf

Answer

20 lbf

Answer

40 lbf

Answer

50 lbf

Question 3

What component mechanically connects the car door to the hoistway door so they open and close together?

Accepted Answer

Door coupler or clutch vane

Answer

Door restrictor

Answer

Safety edge

Answer

Landing door roller guide

Question 4

What is the function of a safety edge (mechanical reopening device) on a power-operated elevator door?

Accepted Answer

To reverse door motion when physical contact is made during closing

Answer

To prevent the door from opening when the car is in motion

Answer

To lock the door in the open position during passenger loading

Answer

To provide a mechanical stop at the end of door travel

Question 5

What is the key distinction between a car door contact and a hoistway door interlock?

Accepted Answer

A car door contact only detects door position electrically; a hoistway door interlock both physically locks the door and contains an electrical contact

Answer

A car door contact is mechanical; a hoistway door interlock is electrical

Answer

Both perform identical safety functions but are mounted on different doors

Answer

A car door contact prevents car movement; a hoistway door interlock controls door speed

Question 6

What must activate when nudging operation is initiated on a power-operated elevator door?

Accepted Answer

A continuous audible signal as the door closes at reduced speed

Answer

A visual strobe light at the entrance

Answer

A voice announcement stating the current floor number

Answer

An immediate emergency stop of the elevator

Question 7

What is a vision panel in a hoistway door, and what material does ASME A17.1 require it to use?

Accepted Answer

A glazed opening allowing viewing into the hoistway; must use wire glass or approved safety glazing

Answer

An inspection port for viewing mechanical components; must be steel mesh

Answer

A transparent floor indicator showing car level; must be polycarbonate

Answer

A window allowing passengers to see the car approach; must be tempered glass only