ELEVATOR MECHANIC EXAM 2024/2025 WITH
ACCURATE SOLUTIONS
A contractor wants to raise the car speed from 100fpm to 125fpm, it
currently has a 12" sheave. What sheave is required? - Precise Answer
✔✔Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15"
sheave
A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot
read voltage or resistance. What should you do? - Precise Answer
✔✔Replace it with a larger MOV
On a Ward-Leonard circuit the break is set, but the motor is trying to slip
through the break. What is the issue? - Precise Answer ✔✔Suicide
Circuit
You have an old DC motor and are adding an SCR drive, what do you
do to the interpoles? - Precise Answer ✔✔Leave the interpoles alone.
When adding a SCR drive to the generator, the series loop is removed,
as are the 3 resistors. Everything else remains the same
A hydro runs up with no load, but will not run with a full load. What is
the issue? - Precise Answer ✔✔The relief valve is set too low
,Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT
runby should be set at 18". How much should the ropes be shortened? -
Precise Answer ✔✔22"
You need to work on a freight door retiring cam, you LOTO the main
line but there is still power on the cam. What circuit is still hot? - Precise
Answer ✔✔Door Operator Disconnect/ Main Line Disconnect
The contractor requests that the vertical center of a Rack and Pinion
hoist be moved. How do you do this? - Precise Answer ✔✔Adjust Tie
Downs and Wall Ties
Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting? - Precise Answer ✔✔400psi x 150%= 600psi
What must be installed on a false car before operation? - Precise Answer
✔✔Spring Loaded Safeties.
There is slight arcing between the brush and commutator. What action
must be taken? - Precise Answer ✔✔None.
Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical
wear
If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a
6,000lb load. What is the beam capacity? - Precise Answer
✔✔18,000lbs. Beam capacity is cut in half with use of clamp, when
,rigging all blocks, rope, and clamps will be Equal to the lowest load
rating
How much resistance is measured over a normally closed switch? -
Precise Answer ✔✔1.2ohms. should be zero, but will never be that low
A car traveling in the hoistway always stops at the same spot and blows
a fuse. What causes this? - Precise Answer ✔✔Traveling cable has a
cut/exposed wire or a short
How is a class 1 yearly buffer test preformed? - Precise Answer ✔✔Car
at bottom landing and on inspection, jump out direction and final limits.
With pit clear, run down to compress buffers, buffers should fully extend
within 90 seconds.
5yr: Full load Full speed
CWT: Full speed Empty
How many strain supports are required on a 350ft raceway? - Precise
Answer ✔✔4. 1 every 100ft
How is stainless steel drilled out? - Precise Answer ✔✔Slow speed and
constant pressure
What is the required amount of retainer clips for wedge shackles and
what is the spacing? - Precise Answer ✔✔Minimum 2 clips. 1st at a
maximum 4x the diameter of the rope
, 2nd at a maximum 8x the diameter above the 1st clip
A 300ohm resistor burns out, but you don't have another one. How can
you make one? - Precise Answer ✔✔2 600ohm resistors in parallel is
300ohms. Resistance is half of highest resistor in parallel circuit.
3 225ohm resistors in parallel is 75ohms.
When cutting laminated panels, which direction should the finish side
face? - Precise Answer ✔✔Finish side facing the cutting edge of the
tool. Blade will burr the backside
How do you cut a finished floor? - Precise Answer ✔✔Cutting blade
away from finished side
A 480vac stepdown 240vac transformer is connected to a 3 phase
rectifier, what is the output voltage? - Precise Answer ✔✔320vac
3 phase full wave = 1.33x output voltage
A car is loaded with 125% and sinks, why? - Precise Answer
✔✔Slipping through the break
If you find a broken or missing barricade what should you do? - Precise
Answer ✔✔Write up a formal inspection request
ACCURATE SOLUTIONS
A contractor wants to raise the car speed from 100fpm to 125fpm, it
currently has a 12" sheave. What sheave is required? - Precise Answer
✔✔Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15"
sheave
A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot
read voltage or resistance. What should you do? - Precise Answer
✔✔Replace it with a larger MOV
On a Ward-Leonard circuit the break is set, but the motor is trying to slip
through the break. What is the issue? - Precise Answer ✔✔Suicide
Circuit
You have an old DC motor and are adding an SCR drive, what do you
do to the interpoles? - Precise Answer ✔✔Leave the interpoles alone.
When adding a SCR drive to the generator, the series loop is removed,
as are the 3 resistors. Everything else remains the same
A hydro runs up with no load, but will not run with a full load. What is
the issue? - Precise Answer ✔✔The relief valve is set too low
,Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT
runby should be set at 18". How much should the ropes be shortened? -
Precise Answer ✔✔22"
You need to work on a freight door retiring cam, you LOTO the main
line but there is still power on the cam. What circuit is still hot? - Precise
Answer ✔✔Door Operator Disconnect/ Main Line Disconnect
The contractor requests that the vertical center of a Rack and Pinion
hoist be moved. How do you do this? - Precise Answer ✔✔Adjust Tie
Downs and Wall Ties
Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting? - Precise Answer ✔✔400psi x 150%= 600psi
What must be installed on a false car before operation? - Precise Answer
✔✔Spring Loaded Safeties.
There is slight arcing between the brush and commutator. What action
must be taken? - Precise Answer ✔✔None.
Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical
wear
If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a
6,000lb load. What is the beam capacity? - Precise Answer
✔✔18,000lbs. Beam capacity is cut in half with use of clamp, when
,rigging all blocks, rope, and clamps will be Equal to the lowest load
rating
How much resistance is measured over a normally closed switch? -
Precise Answer ✔✔1.2ohms. should be zero, but will never be that low
A car traveling in the hoistway always stops at the same spot and blows
a fuse. What causes this? - Precise Answer ✔✔Traveling cable has a
cut/exposed wire or a short
How is a class 1 yearly buffer test preformed? - Precise Answer ✔✔Car
at bottom landing and on inspection, jump out direction and final limits.
With pit clear, run down to compress buffers, buffers should fully extend
within 90 seconds.
5yr: Full load Full speed
CWT: Full speed Empty
How many strain supports are required on a 350ft raceway? - Precise
Answer ✔✔4. 1 every 100ft
How is stainless steel drilled out? - Precise Answer ✔✔Slow speed and
constant pressure
What is the required amount of retainer clips for wedge shackles and
what is the spacing? - Precise Answer ✔✔Minimum 2 clips. 1st at a
maximum 4x the diameter of the rope
, 2nd at a maximum 8x the diameter above the 1st clip
A 300ohm resistor burns out, but you don't have another one. How can
you make one? - Precise Answer ✔✔2 600ohm resistors in parallel is
300ohms. Resistance is half of highest resistor in parallel circuit.
3 225ohm resistors in parallel is 75ohms.
When cutting laminated panels, which direction should the finish side
face? - Precise Answer ✔✔Finish side facing the cutting edge of the
tool. Blade will burr the backside
How do you cut a finished floor? - Precise Answer ✔✔Cutting blade
away from finished side
A 480vac stepdown 240vac transformer is connected to a 3 phase
rectifier, what is the output voltage? - Precise Answer ✔✔320vac
3 phase full wave = 1.33x output voltage
A car is loaded with 125% and sinks, why? - Precise Answer
✔✔Slipping through the break
If you find a broken or missing barricade what should you do? - Precise
Answer ✔✔Write up a formal inspection request
