Ultimate Mechanics Review Exam
2025 Questions and Answers
1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a
12" sheave. What sheave is required? - ANSWER✔✔-100fpm / 125fpm = 12" / X= 15"
2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or
resistance. What should you do? - ANSWER✔✔-Replace it with a larger MOV
3. On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the
break. What is the issue? - ANSWER✔✔-Suicide Circuit
4. You have an old DC motor and are adding an SCR drive, what do you do to the
interpoles? - ANSWER✔✔-Leave the interpoles alone. When adding a SCR drive to the
generator, the series loop is removed, as are the 3 resistors. Everything else remains the
same.
5. A hydro runs up with no load, but will not run with a full load. What is the issue? -
ANSWER✔✔-The relief valve is set too low
,6. Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT runby should be
set at 18". How much should the ropes be shortened? - ANSWER✔✔-22"
7. You need to work on a freight door retiring cam, you LOTO the main line but there is
still power on the cam. What circuit is still hot? - ANSWER✔✔-Door Operator
Disconnect/ Main Line Disconnect
8. The contractor requests that the vertical center of a Rack and Pinion hoist be moved.
How do you do this? - ANSWER✔✔-Adjust Tie Downs and Wall Ties
9. Working pressure on a Hydro is 400psi. What is the maximum relief valve setting? -
ANSWER✔✔-400psi x 150%= 600psi
10. What must be installed on a false car before operation? - ANSWER✔✔-Spring
Loaded Safeties
11. There is slight arcing between the brush and commutator. What action must be
taken? - ANSWER✔✔-None
Note: Heavy arcing=Light brush pressure, Heavy bush pressure=mechanical wear
12. If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What
is the beam capacity requirement? - ANSWER✔✔-18,000lbs.
Note: Beam capacity is cut in half with use of clamp, when rigging all blocks, rope, and
clamps will be Equal to the lowest load rating
,13. How much resistance is measured over a normally closed switch? - ANSWER✔✔-
.60 ohms
14. A car traveling in the hoistway always stops at the same spot and blows a fuse.
What causes this - ANSWER✔✔-Traveling cable has a cut/exposed wire or a short
15. How is a class 1 yearly buffer test preformed? - ANSWER✔✔-Car at bottom landing
and on inspection, jump out direction and final limits.
With pit clear, run down to compress buffers, buffers should fully extend within 90
seconds.
Note: 5yr: Full load Full speed CWT: Full speed Empty (may be 60 on test)
16. How many strain supports are required on a 350ft raceway? - ANSWER✔✔-4. 1
every 100ft
17) How is stainless steel drilled out? - ANSWER✔✔-Slow speed and constant pressure
18. What is the required amount of retainer clips for wedge shackles and what is the
spacing? - ANSWER✔✔-At least 2. First clip being maximum 4 times the diameter of
the rope from the top of the shackle, and the second clip is maximum 8 times the
diameter of the rope above the first clip.
19. A 125ohm resistor burns out but you don't have another one. How can you make
one? - ANSWER✔✔-2 250ohm resistors in parallel.
, 20. When cutting laminated panels, which direction should the finish side face? -
ANSWER✔✔-Finish side facing the cutting edge of the tool. Blade will burr the
backside
21. How do you cut a finished floor? - ANSWER✔✔-Cutting blade away from finished
side
22. A 480vac stepdown 240vac transformer is connected to a 3 phase rectifier, what is
the output voltage? - ANSWER✔✔-320vac 3 phase full wave = 1.33x output voltage.
23) Car is loaded with 125% and sinks. Why? - ANSWER✔✔-Slipping through the break
24. If you find a broken or missing barricade what should you do? - ANSWER✔✔-Write
up a formal inspection request
25. What are the consequences of misaligned joints on a Rack and Pinion? -
ANSWER✔✔-Broken Gear teeth. CWT derailment. Excessive wear/ crease the surface
of the tube
26. A dumbwaiter is 9sqft in area, 4ft high, and capacity is 13.9lb/ft3. What is total
capacity? - ANSWER✔✔-9 x 4 x 13.9= 500lbs Max capacity
27. You must enter a pit with a toxic atmosphere, how do you proceed? - ANSWER✔✔-
Following proper OSHA procedure with proper training and PPE
2025 Questions and Answers
1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a
12" sheave. What sheave is required? - ANSWER✔✔-100fpm / 125fpm = 12" / X= 15"
2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or
resistance. What should you do? - ANSWER✔✔-Replace it with a larger MOV
3. On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the
break. What is the issue? - ANSWER✔✔-Suicide Circuit
4. You have an old DC motor and are adding an SCR drive, what do you do to the
interpoles? - ANSWER✔✔-Leave the interpoles alone. When adding a SCR drive to the
generator, the series loop is removed, as are the 3 resistors. Everything else remains the
same.
5. A hydro runs up with no load, but will not run with a full load. What is the issue? -
ANSWER✔✔-The relief valve is set too low
,6. Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT runby should be
set at 18". How much should the ropes be shortened? - ANSWER✔✔-22"
7. You need to work on a freight door retiring cam, you LOTO the main line but there is
still power on the cam. What circuit is still hot? - ANSWER✔✔-Door Operator
Disconnect/ Main Line Disconnect
8. The contractor requests that the vertical center of a Rack and Pinion hoist be moved.
How do you do this? - ANSWER✔✔-Adjust Tie Downs and Wall Ties
9. Working pressure on a Hydro is 400psi. What is the maximum relief valve setting? -
ANSWER✔✔-400psi x 150%= 600psi
10. What must be installed on a false car before operation? - ANSWER✔✔-Spring
Loaded Safeties
11. There is slight arcing between the brush and commutator. What action must be
taken? - ANSWER✔✔-None
Note: Heavy arcing=Light brush pressure, Heavy bush pressure=mechanical wear
12. If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What
is the beam capacity requirement? - ANSWER✔✔-18,000lbs.
Note: Beam capacity is cut in half with use of clamp, when rigging all blocks, rope, and
clamps will be Equal to the lowest load rating
,13. How much resistance is measured over a normally closed switch? - ANSWER✔✔-
.60 ohms
14. A car traveling in the hoistway always stops at the same spot and blows a fuse.
What causes this - ANSWER✔✔-Traveling cable has a cut/exposed wire or a short
15. How is a class 1 yearly buffer test preformed? - ANSWER✔✔-Car at bottom landing
and on inspection, jump out direction and final limits.
With pit clear, run down to compress buffers, buffers should fully extend within 90
seconds.
Note: 5yr: Full load Full speed CWT: Full speed Empty (may be 60 on test)
16. How many strain supports are required on a 350ft raceway? - ANSWER✔✔-4. 1
every 100ft
17) How is stainless steel drilled out? - ANSWER✔✔-Slow speed and constant pressure
18. What is the required amount of retainer clips for wedge shackles and what is the
spacing? - ANSWER✔✔-At least 2. First clip being maximum 4 times the diameter of
the rope from the top of the shackle, and the second clip is maximum 8 times the
diameter of the rope above the first clip.
19. A 125ohm resistor burns out but you don't have another one. How can you make
one? - ANSWER✔✔-2 250ohm resistors in parallel.
, 20. When cutting laminated panels, which direction should the finish side face? -
ANSWER✔✔-Finish side facing the cutting edge of the tool. Blade will burr the
backside
21. How do you cut a finished floor? - ANSWER✔✔-Cutting blade away from finished
side
22. A 480vac stepdown 240vac transformer is connected to a 3 phase rectifier, what is
the output voltage? - ANSWER✔✔-320vac 3 phase full wave = 1.33x output voltage.
23) Car is loaded with 125% and sinks. Why? - ANSWER✔✔-Slipping through the break
24. If you find a broken or missing barricade what should you do? - ANSWER✔✔-Write
up a formal inspection request
25. What are the consequences of misaligned joints on a Rack and Pinion? -
ANSWER✔✔-Broken Gear teeth. CWT derailment. Excessive wear/ crease the surface
of the tube
26. A dumbwaiter is 9sqft in area, 4ft high, and capacity is 13.9lb/ft3. What is total
capacity? - ANSWER✔✔-9 x 4 x 13.9= 500lbs Max capacity
27. You must enter a pit with a toxic atmosphere, how do you proceed? - ANSWER✔✔-
Following proper OSHA procedure with proper training and PPE
