QUESTIONS & ANSWERS (A+ GRADED 100%
VERIFIED) 2025 LATEST!!
1. What is the primary function of the Motion Controller (MCB) in the MCE Elevator
Controller?
A: To control the hoist motor and manage the elevator's movement, including speed, direction,
and stopping.
2. What does UCM stand for?
A: Unintended Car Movement.
3. The Car Top Inspection Station provides a means for moving the elevator in what mode?
A: Inspection Mode.
4. What is the purpose of the Governor?
A: To detect overspeed of the elevator car and initiate the safety system to stop it.
5. Which safety device is activated when the governor trips?
A: The Safeties (car safeties and/or counterweight safeties).
6. What is the function of the Final Terminal Stopping Device?
A: To remove power from the hoist motor and apply the brake if the elevator overtravels the top
or bottom terminal floor.
, 7. In the MCE controller, what is the main purpose of the Group Dispatcher (GDCB)?
A: To assign elevator cars to hall calls for efficient group operation.
8. What does the Door Operator Controller (DOCB) manage?
A: The opening and closing of the car and hoistway doors.
9. Before working on the elevator controller, what is the FIRST step a technician must take?
A: Lock out and tag out the main line disconnect switch.
10. What is the standard voltage for the control circuits in an MCE controller?
A: 125 VDC.
11. What is the primary purpose of the Traction Machine Brake?
A: To hold the elevator car at a floor when stopped.
12. A "Runaway" elevator condition is most directly prevented by which system?
A: The Governor and Safety System.
13. What is the function of the Buffers in the elevator hoistway?
A: To bring a descending car or counterweight to a gradual stop in the event of an overtravel.
14. What does AVR stand for in the context of the MCE controller?
A: Automatic Voltage Regulator.
15. The Car Safety Device is activated by what mechanism?
A: The Governor rope and governor.
16. What is the purpose of the Hoistway Door Interlock?
A: To prevent the elevator from running unless the hoistway door is closed and locked.