3/25/26, 2:37 PM
MECHANICS EXAM QUESTIONA AND ACCURATE ANSWERS
1/16
,3/25/26, 2:37 PM
** An MOV burns out, you replace it but cannot read voltage Replace it with a
larger one (630) or resistance. What should you do?
* On a Ward-Leonard circuit, the brake is set but the motor is Suicide
circuit (425) trying to slip through the brake. What circuit is the issue?
** A Hydro runs up with no load but does not run up The relief valve is set too low (805)
with a full load. What is the issue?
** Runby for a 1:1 car hits the CWT buffer 4" below the 22" for 1:1.
top landing. The CWT runby should be set at 18". How For a 2:1 with the same issue is 44".
much should the ropes be shortened?
** You need to work on a freight door retiring cam. You Mainline disconnect (535)
LOTO the mainline disconnect but there is still power
to the cam.
What circuit is still hot?
** The contractor requests that the vertical center of the Adjust Tie downs/Wall ties (805)
Rack and Pinion hoist be moved. How is this
accomplished?
** Working pressure on a Hydro is 400 PSI. What is the 600 PSI Max. (805)
correct Relief Valve Setting? 400 psi x 150% = 600 psi
** A contractor wants to raise the car speed from 100 15"
FPM to 125 FPM. It currently has a 12" sheave. What (125 /100 = 1.25 1.25 x 12 = 15)
size sheave is required?
** There is slight arcing at the Brushes and Commutator. None. (430)
What actions must be taken? "Heavy arcing is due to light brush pressure. Mechanical wear indicates heavy
brush pressure.
2/16
, 3/25/26, 2:37 PM
** How much resistance is normally measured across a 1.2 ohms or 1 to 2 ohms
normally closed switch ?
3/16
MECHANICS EXAM QUESTIONA AND ACCURATE ANSWERS
1/16
,3/25/26, 2:37 PM
** An MOV burns out, you replace it but cannot read voltage Replace it with a
larger one (630) or resistance. What should you do?
* On a Ward-Leonard circuit, the brake is set but the motor is Suicide
circuit (425) trying to slip through the brake. What circuit is the issue?
** A Hydro runs up with no load but does not run up The relief valve is set too low (805)
with a full load. What is the issue?
** Runby for a 1:1 car hits the CWT buffer 4" below the 22" for 1:1.
top landing. The CWT runby should be set at 18". How For a 2:1 with the same issue is 44".
much should the ropes be shortened?
** You need to work on a freight door retiring cam. You Mainline disconnect (535)
LOTO the mainline disconnect but there is still power
to the cam.
What circuit is still hot?
** The contractor requests that the vertical center of the Adjust Tie downs/Wall ties (805)
Rack and Pinion hoist be moved. How is this
accomplished?
** Working pressure on a Hydro is 400 PSI. What is the 600 PSI Max. (805)
correct Relief Valve Setting? 400 psi x 150% = 600 psi
** A contractor wants to raise the car speed from 100 15"
FPM to 125 FPM. It currently has a 12" sheave. What (125 /100 = 1.25 1.25 x 12 = 15)
size sheave is required?
** There is slight arcing at the Brushes and Commutator. None. (430)
What actions must be taken? "Heavy arcing is due to light brush pressure. Mechanical wear indicates heavy
brush pressure.
2/16
, 3/25/26, 2:37 PM
** How much resistance is normally measured across a 1.2 ohms or 1 to 2 ohms
normally closed switch ?
3/16
