ELEVATOR 245 250 EXAM SCRIPT WITH
ACCURATE ANSWERS
◉ 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
◉ 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: 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?
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?
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?
ACCURATE ANSWERS
◉ 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
◉ 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: 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?
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?
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?
