MECHANICS EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
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Course
MECHANICS
Institution
MECHANICS
An MOV burns out, you replace it but cannot read voltage or resistance. What should you do? - ACCURATE ANSWERReplace 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? - ACCURATE ANSWERSuicide circu...
MECHANICS EXAM 2024\2025
MECHANICS EXAM 2024\2025 WITH GUARANTEED ACCURATE ANSWERS |
VERIFIED
An MOV burns out, you replace it but cannot read voltage or resistance. What
should you do? - ACCURATE 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? - ACCURATE ANSWER✅✅Suicide circuit
(425)
A Hydro runs up with no load but does not run up with a full load. What is the
issue? - ACCURATE 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? - ACCURATE
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? -
ACCURATE ANSWER✅✅Mainline disconnect (535)
The contractor requests that the vertical center of the Rack and Pinion hoist be
moved. How is this accomplished? - ACCURATE ANSWER✅✅Adjust Tie
downs/Wall ties (805)
Working pressure on a Hydro is 400 PSI. What is the correct Relief Valve Setting?
- ACCURATE 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? - ACCURATE 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?
- ACCURATE 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 ? -
ACCURATE 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? - ACCURATE ANSWER✅✅Traveling cable has a cut or
short
, How is a Class 1 (yearly) buffer test performed? - ACCURATE
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? - ACCURATE
ANSWER✅✅4
One for every 100'
How is Stainless steel drilled out? - ACCURATE ANSWER✅✅Slow speed and
constant pressure (205)
What are the required amount of clips for Wedge Shackles and what is their
spacing? - ACCURATE 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? - ACCURATE
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? - ACCURATE 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? - ACCURATE ANSWER✅✅320 VDC
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