ELEVATOR- OPERATION Final Exam Questions with Guaranteed Pass Solutions.

ELEVATOR- OPERATION Final Exam
Questions with Guaranteed Pass
Solutions.
An MOV burns out, you replace it but cannot read voltage or resistance. What should you do? -
Answer Replace it with a larger one (630)



* On a Ward-Leonard circuit, the brake is set but the motor is trying to slip through the brake.
What circuit is the issue? - Answer Suicide circuit (425)



** A Hydro runs up with no load but does not run up with a full load. What is the issue? -
Answer The relief valve is set too low (805)



** Runby for a 1:1 car hits the CWT buffer 4" below the top landing. The CWT runby should be
set at 18". How much should the ropes be shortened? - Answer 22" for 1:1.

For a 2:1 with the same issue is 44".



** You need to work on a freight door retiring cam. You LOTO the mainline disconnect but there
is still power to the cam. What circuit is still hot? - Answer Mainline disconnect (535)



** The contractor requests that the vertical center of the Rack and Pinion hoist be moved. How
is this accomplished? - Answer Adjust Tie downs/Wall ties (805)



** Working pressure on a Hydro is 400 PSI. What is the correct Relief Valve Setting? - Answer
600 PSI Max. (805)

400 psi x 150% = 600 psi



** A contractor wants to raise the car speed from 100 FPM to 125 FPM. It currently has a 12"
sheave. What size sheave is required? - Answer 15"

(125 /100 = 1.25 1.25 x 12 = 15)



** There is slight arcing at the Brushes and Commutator. What actions must be taken? - Answer
None. (430)

"Heavy arcing is due to light brush pressure. Mechanical wear indicates heavy brush pressure.



** How much resistance is normally measured across a normally closed switch ? - Answer 1.2
ohms or 1 to 2 ohms

, ** A car traveling in the hoistway always stops at the same point and blows a fuse. What is the
problem? - Answer Traveling cable has a cut or short



** How is a Class 1 (yearly) buffer test performed? - Answer At slow speed and the buffer
must return in 90 seconds. (555) *(60 seconds is acceptable) (90 seconds is code)

5 year test (Class 5) is car at rated load and speed. Buffer must return in 90 seconds. CWT at
rated speed and buffer must return in 90 seconds.



** How many Strain Supports are required on a 350' raceway? - Answer 4

One for every 100'



** How is Stainless steel drilled out? - Answer Slow speed and constant pressure (205)



** What are the required amount of clips for Wedge Shackles and what is their spacing? -
Answer At least 2, with the first being 4 times the diameter of the rope from the top of
shackle.

Second is 8 times the diameter of the rope from the first.



** Car is loaded with 125% and sinks. Why? - Answer Slipped through the brake.



** A 300 Ohm resistor burns out. You don't have a 300 Ohm resistor to replace it. What can you
use to make up the resistor? - Answer 2 600 Ohms resistors in Parallel. "The resistance is half
of the highest rating in a parallel circuit.

3, 225 Ohm resistors in parallel equal 75 Ohms.



** A 480 VAC Step Down Transformer is connected to a 3 phase rectifier. What will the output
be? - Answer 320 VDC

480 - 33.33% = 320



** If you find a broken or missing barricade, what do you do? - Answer Write up a formal
inspection request.



** If a Dumbwaiter has 9 square feet in Area,

4 ' High and the rated Capacity is 13.9 lb/ft3, what is the total capacity? - Answer 500 lb/ft3.

"The area of a Dumbwaiter is 9 sq' max and is 4' High. Multiply that by 13.9.

9x4 = 36. 36 x 13.9 = 500