MECHANICS EXAM NEIEP | QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | LATEST EXAM
** 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?
VERIFIED AND WELL DETAILED ANSWERS | LATEST EXAM
** 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?
