ELEVATOR MECHANIC CERTIFICATION
EVALUATION SCRIPT FULL SOLUTION
GRADED A+
●● A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot
read voltage or resistance. What should you do?
Answer: Check circuit voltage
●● 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
●● 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
●● 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
,●● 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: 1:1-22"
2:1-44"
●● 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 circuit is still hot, 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?
Answer: Adjust Tie Downs and Wall Ties
●● Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting?
Answer: 400psi x 150%= 600psi
●● What must be installed on a false car before operation?
Answer: Spring Loaded Safeties.
●● 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
●● 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
●● How much resistance is measured over a normally closed switch?
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?
Answer: Traveling cable has a cut/exposed wire or a short
●● How is a class 1 yearly buffer test preformed?
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?
, Answer: 4-1 every 100ft
●● How is stainless steel drilled out?
Answer: Slow speed and constant pressure
●● What is the required amount of retainer clips for wedge shackles and
what is the spacing?
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?
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?
Answer: Finish side facing the cutting edge of the tool. Blade will burr
the backside
●● How do you cut a finished floor?
Answer: Cutting blade away from finished side
EVALUATION SCRIPT FULL SOLUTION
GRADED A+
●● A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot
read voltage or resistance. What should you do?
Answer: Check circuit voltage
●● 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
●● 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
●● 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
,●● 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: 1:1-22"
2:1-44"
●● 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 circuit is still hot, 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?
Answer: Adjust Tie Downs and Wall Ties
●● Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting?
Answer: 400psi x 150%= 600psi
●● What must be installed on a false car before operation?
Answer: Spring Loaded Safeties.
●● 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
●● 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
●● How much resistance is measured over a normally closed switch?
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?
Answer: Traveling cable has a cut/exposed wire or a short
●● How is a class 1 yearly buffer test preformed?
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?
, Answer: 4-1 every 100ft
●● How is stainless steel drilled out?
Answer: Slow speed and constant pressure
●● What is the required amount of retainer clips for wedge shackles and
what is the spacing?
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?
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?
Answer: Finish side facing the cutting edge of the tool. Blade will burr
the backside
●● How do you cut a finished floor?
Answer: Cutting blade away from finished side
