SOS Mechanic Exam (2025) QUESTIONS
AND ALL CORRECT ANSWERS 100%
SOLVED AND GUARANTEED SUCCESS!!
** An MOV burns out, you replace it but cannot read voltage or resistance. What should you
do?
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?
Suicide circuit (425)
** A Hydro runs up with no load but does not run up with a full load. What is the issue?
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?
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?
Mainline disconnect (535)
** The contractor requests that the vertical center of the Rack and Pinion hoist be moved.
How is this accomplished?
Adjust Tie downs/Wall ties (805)
** Working pressure on a Hydro is 400 PSI. What is the correct Relief Valve Setting?
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?
,15"
(125 /100 = 1.25 1.25 x 12 = 15)
** There is slight arcing at the Brushes and Commutator. What actions must be taken?
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 ?
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?
Traveling cable has a cut or short
** How is a Class 1 (yearly) buffer test performed?
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?
4
One for every 100'
** How is Stainless steel drilled out?
Slow speed and constant pressure (205)
** What are the required amount of clips for Wedge Shackles and what is their spacing?
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?
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?
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?
320 VDC
480 - 33.33% = 320
** If you find a broken or missing barricade, what do you do?
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?
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
** What are the consequences of a misaligned Rack and Pinion hoist joint?
Broken Gear Teeth (850) Motor not aligned.
** You enter a Pit where toxic fumes are present. How do you proceed?
Follow proper procedures.
"Confined Space entry procedures are now guided by OSHA for pit entry".
** When changing a 1:1 car rated at 600 FPM and 2000 lb capacity to a 2:1, what will the new
ratings be?
300 FPM and 4000 lb capacity.
"Halves the speed and doubles the capacity ".
** A "Vertical" platform lift has a clearance of 1". How much will it need to be moved to meet
code?
Deduct 1/4".
( 3/4" ) is needed.
** A car weighs 2500 lbs with a capacity of 2500 lbs. The CWT is weighed at 40%. How much is
the motor lifting at 100% load?
1500 lbs
2500 x .40 = 1000 lbs
2500 + 1000 = 3500 lbs
5000 - 3500 = 1500 lbs
, ** When drilling a Jack Hole in sandy conditions, what type of drill rig is required?
Rotary or Auger bit (805)
Rotary = Compacted soil
Percussion = Rocky conditions
Percussion Rotary = Solid rock
** A customer does not want an Escape Hatch on his residential elevator. Under what
conditions is this legal?
Manual Operation must be provided (850)
** You wired the Down Direction and Final Limit switches. Now the car only runs up. What is
the problem?
You wired the Down Direction Limit wrong.
** What are the effects of one rope sitting deeper in the sheave groove?
The rope wears out and breaks faster (250)
** There is a noise coming from a freight door. The sheave is moving but the chain is not.
What is the problem?
Oil on on the chain
* What is the effect when you change a sling angle from 60 to 30* when hoisting and rigging?
More tension, less capacity.
** How many points of contact must be maintained on a ladder?
3 points at all time.
* What is the conversion formula when measuring Inch to MM?
25.4 Inch to MM (.03937)
2.54 Inch to CM (.3937)
** You open a Dumbwaiter access panel and it still runs. What is the cause?
Pit Access switch is not working. (550)
** You perform a static load test with the pit valve in the closed position. The car sinks 6" in
15 minutes. What is the cause?
Cylinder leak (520)
AND ALL CORRECT ANSWERS 100%
SOLVED AND GUARANTEED SUCCESS!!
** An MOV burns out, you replace it but cannot read voltage or resistance. What should you
do?
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?
Suicide circuit (425)
** A Hydro runs up with no load but does not run up with a full load. What is the issue?
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?
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?
Mainline disconnect (535)
** The contractor requests that the vertical center of the Rack and Pinion hoist be moved.
How is this accomplished?
Adjust Tie downs/Wall ties (805)
** Working pressure on a Hydro is 400 PSI. What is the correct Relief Valve Setting?
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?
,15"
(125 /100 = 1.25 1.25 x 12 = 15)
** There is slight arcing at the Brushes and Commutator. What actions must be taken?
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 ?
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?
Traveling cable has a cut or short
** How is a Class 1 (yearly) buffer test performed?
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?
4
One for every 100'
** How is Stainless steel drilled out?
Slow speed and constant pressure (205)
** What are the required amount of clips for Wedge Shackles and what is their spacing?
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?
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?
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?
320 VDC
480 - 33.33% = 320
** If you find a broken or missing barricade, what do you do?
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?
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
** What are the consequences of a misaligned Rack and Pinion hoist joint?
Broken Gear Teeth (850) Motor not aligned.
** You enter a Pit where toxic fumes are present. How do you proceed?
Follow proper procedures.
"Confined Space entry procedures are now guided by OSHA for pit entry".
** When changing a 1:1 car rated at 600 FPM and 2000 lb capacity to a 2:1, what will the new
ratings be?
300 FPM and 4000 lb capacity.
"Halves the speed and doubles the capacity ".
** A "Vertical" platform lift has a clearance of 1". How much will it need to be moved to meet
code?
Deduct 1/4".
( 3/4" ) is needed.
** A car weighs 2500 lbs with a capacity of 2500 lbs. The CWT is weighed at 40%. How much is
the motor lifting at 100% load?
1500 lbs
2500 x .40 = 1000 lbs
2500 + 1000 = 3500 lbs
5000 - 3500 = 1500 lbs
, ** When drilling a Jack Hole in sandy conditions, what type of drill rig is required?
Rotary or Auger bit (805)
Rotary = Compacted soil
Percussion = Rocky conditions
Percussion Rotary = Solid rock
** A customer does not want an Escape Hatch on his residential elevator. Under what
conditions is this legal?
Manual Operation must be provided (850)
** You wired the Down Direction and Final Limit switches. Now the car only runs up. What is
the problem?
You wired the Down Direction Limit wrong.
** What are the effects of one rope sitting deeper in the sheave groove?
The rope wears out and breaks faster (250)
** There is a noise coming from a freight door. The sheave is moving but the chain is not.
What is the problem?
Oil on on the chain
* What is the effect when you change a sling angle from 60 to 30* when hoisting and rigging?
More tension, less capacity.
** How many points of contact must be maintained on a ladder?
3 points at all time.
* What is the conversion formula when measuring Inch to MM?
25.4 Inch to MM (.03937)
2.54 Inch to CM (.3937)
** You open a Dumbwaiter access panel and it still runs. What is the cause?
Pit Access switch is not working. (550)
** You perform a static load test with the pit valve in the closed position. The car sinks 6" in
15 minutes. What is the cause?
Cylinder leak (520)
