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2026/2027
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, A contractor wants to raise the car speed from 100fpm to Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave
125fpm, it currently has a 12" sheave. What sheave is
required?
A MOV (Metal Oxide Varistor) burns out. You replace it, Replace it with a larger MOV
but cannot read voltage or resistance. What should you
do?
On a Ward-Leonard circuit the break is set, but the motor Suicide Circuit
is trying to slip through the break. What is the issue?
You have an old DC motor and are adding an SCR drive, Leave the interpoles alone. When adding a SCR drive to the generator, the
what do you do to the interpoles? 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 The relief valve is set too low
load. What is the issue?
Runby for a 1:1 hits the CWT buffer 4" below the top 22"
landing. CWT runby should be set at 18". How much
should the ropes be shortened?
You need to work on a freight door retiring cam, you Door Operator Disconnect/ Main Line Disconnect
LOTO the main line but there is still power on the cam.
What circuit is still hot?
The contractor requests that the vertical center of a Rack Adjust Tie Downs and Wall Ties
and Pinion hoist be moved. How do you do this?
Working pressure on a Hydro is 400psi. What is the 400psi x 150%= 600psi
maximum relief valve setting?
What must be installed on a false car before operation? Spring Loaded Safeties.
There is slight arcing between the brush and None.
commutator. What action must be taken? Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical wear
If rigging gear is roped 3:1 and a BEAM CLAMP is used 18,000lbs. Beam capacity is cut in half with use of clamp, when rigging all blocks,
to lift a 6,000lb load. What is the beam capacity? rope, and clamps will be Equal to the lowest load rating
How much resistance is measured over a normally 1.2ohms. should be zero, but will never be that low
closed switch?
A car traveling in the hoistway always stops at the same Traveling cable has a cut/exposed wire or a short
spot and blows a fuse. What causes this?
How is a class 1 yearly buffer test preformed? 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 4. 1 every 100ft
raceway?