Elevator Mechanic Exam Review:
Verified Solutions (A+ Guaranteed)
Question : A contractor wants to raise the car speed from
100fpm to 125fpm, it currently has a 12" sheave. What sheave is required?
Correct answer: Diam=12" 12/4=3" 25fpm=3" 100fpm +
25fpm= 12"+3"= 15" sheave
Question : A MOV (Metal Oxide Varistor) burns out. You
replace it, but cannot read voltage or resistance. What should you do?
Correct answer: Replace it with a larger MOV
Question : On a Ward-Leonard circuit the break is set, but the
motor is trying to slip through the break. What is the issue?
Correct answer: Suicide Circuit
Question : You have an old DC motor and are adding an SCR
drive, what do you do to the interpoles?
Correct 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
Question : A hydro runs up with no load, but will not run with
a full load. What is the issue?
Correct answer: The relief valve is set too low
Question : 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?
Correct answer: 22"
Question : 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?
Correct answer: Door Operator Disconnect/ Main Line
Disconnect
Question : The contractor requests that the vertical center of a
Rack and Pinion hoist be moved. How do you do this?
Correct answer: Adjust Tie Downs and Wall Ties
Question : Working pressure on a Hydro is 400psi. What is
the maximum relief valve setting?
Correct answer: 400psi x 150%= 600psi
Question : What must be installed on a false car before
operation?
Correct answer: Spring Loaded Safeties.
Question : There is slight arcing between the brush and
commutator. What action must be taken?
Correct answer: None.
Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical wear
Question : If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is the beam capacity?
Correct 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
Question : How much resistance is measured over a normally
closed switch?
Correct answer: 1.2ohms. should be zero, but will never be
that low
Question : A car traveling in the hoistway always stops at the
same spot and blows a fuse. What causes this?
Correct answer: Traveling cable has a cut/exposed wire or a
short
Question : How is a class 1 yearly buffer test preformed?
Correct 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.