Practice Test Geeks(CET) Certified Elevator Technician Practice Test
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Door Operators & Interlocks Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Door Operators & Interlocks flashcards as text

  1. According to ASME A17.1, what must happen if the door reopening device fails on a power-operated door?

    Answer: The door must still be able to close at reduced speed

    If the reopening device (such as a safety edge or light curtain) fails, the door must still be capable of closing but must do so at reduced kinetic energy.

  2. Which of the following BEST describes the function of a bi-parting center-opening door system?

    Answer: Each door panel moves in opposite directions away from center

    In a bi-parting center-opening door system, two panels simultaneously move away from each other toward opposite sides of the opening.

  3. A light curtain used as a door reopening device operates on which principle?

    Answer: Projects infrared beams across the door opening and reverses on beam interruption

    A light curtain emits a matrix of infrared beams across the door opening and triggers door reversal when any beam is broken by a passenger or object.

  4. What is the minimum landing sill-to-car sill gap allowed before it becomes a safety hazard for passengers stepping over it?

    Answer: 1-1/4 inches

    ASME A17.1 allows a maximum gap of 1-1/4 inches between the car sill and hoistway (landing) sill to prevent tripping or entrapment hazards.

  5. On an elevator with automatic power-operated doors, what must be verified before the car is permitted to leave a landing?

    Answer: Both the car door contact and the hoistway door interlock contacts must be in the closed position

    Both the car door contact and every hoistway door interlock in the travel path must be confirmed closed in series before the car is allowed to leave a landing.

  6. During a door interlock test, a technician bypasses the hoistway door interlock and the car moves. This result indicates:

    Answer: The interlock is NOT in the safety circuit and must be corrected

    If bypassing the interlock allows car movement, the interlock is not properly in series with the safety circuit, which is a code violation requiring immediate correction.

  7. What is the role of the door dwell time setting on an automatic elevator door operator?

    Answer: Controls how long the door pauses at the fully open position before closing

    Door dwell time is the adjustable period the door remains fully open at a landing, giving passengers adequate time to enter or exit before automatic closing begins.