elevator mechanics Actual Questions and Correct Answers
Q1
A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12"
sheave. What sheave is required?
Answer: Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave
Q2
A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance.
What should you do?
Answer: Replace it with a larger MOV
Q3
On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break.
What is the issue?
Answer: Suicide Circuit
Q4
You have an old DC motor and are adding an SCR drive, what do you do to the interpoles?
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
Q5
A hydro runs up with no load, but will not run with a full load. What is the issue?
Answer: The relief valve is set too low
Q6
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?
Answer: 22"
, Q7
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?
Answer: Door Operator Disconnect/ Main Line Disconnect
Q8
The contractor requests that the vertical center of a Rack and Pinion hoist be moved. How do
you do this?
Answer: Adjust Tie Downs and Wall Ties
Q9
Working pressure on a Hydro is 400psi. What is the maximum relief valve setting?
Answer: 400psi x 150%= 600psi
Q10
What must be installed on a false car before operation?
Answer: Spring Loaded Safeties.
Q11
There is slight arcing between the brush and commutator. What action must be taken?
Answer: None. Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical
wear
Q12
If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is the beam
capacity?
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
Q13
How much resistance is measured over a normally closed switch?
Answer: 1.2ohms. should be zero, but will never be that low
Q1
A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12"
sheave. What sheave is required?
Answer: Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave
Q2
A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance.
What should you do?
Answer: Replace it with a larger MOV
Q3
On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break.
What is the issue?
Answer: Suicide Circuit
Q4
You have an old DC motor and are adding an SCR drive, what do you do to the interpoles?
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
Q5
A hydro runs up with no load, but will not run with a full load. What is the issue?
Answer: The relief valve is set too low
Q6
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?
Answer: 22"
, Q7
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?
Answer: Door Operator Disconnect/ Main Line Disconnect
Q8
The contractor requests that the vertical center of a Rack and Pinion hoist be moved. How do
you do this?
Answer: Adjust Tie Downs and Wall Ties
Q9
Working pressure on a Hydro is 400psi. What is the maximum relief valve setting?
Answer: 400psi x 150%= 600psi
Q10
What must be installed on a false car before operation?
Answer: Spring Loaded Safeties.
Q11
There is slight arcing between the brush and commutator. What action must be taken?
Answer: None. Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical
wear
Q12
If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is the beam
capacity?
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
Q13
How much resistance is measured over a normally closed switch?
Answer: 1.2ohms. should be zero, but will never be that low
