Mechanics Exam 2025 COMPREHENSIVE EXAM
QUESTIONS |FREQUENTLY TESTED QUESTIONS
|RECENTLY TESTING REAL EXAM
QUESTIONS|VERIFIED SOLUTIONS (100% CORRECT)
** 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
QUESTIONS |FREQUENTLY TESTED QUESTIONS
|RECENTLY TESTING REAL EXAM
QUESTIONS|VERIFIED SOLUTIONS (100% CORRECT)
** 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
