Elevator Mechanic Exam
Review/216 Questions with
Verified Solutions/A+ Graded
A contractor wants to raise the car speed from 100fpm to 125fpm, it
currently has a 12" sheave. What sheave is required? - -Diam=12"
12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave
-A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read
voltage or resistance. What should you do? - -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? - -Suicide Circuit
-You have an old DC motor and are adding an SCR drive, what do you
do to the interpoles? - -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? - -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? -
-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? - -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? - -Adjust Tie Downs and Wall Ties
-Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting? - -400psi x 150%= 600psi
-What must be installed on a false car before operation? - -Spring
Loaded Safeties.
-There is slight arcing between the brush and commutator. What action
must be taken? - -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? - -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? - -
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? - -Traveling cable has a cut/exposed
wire or a short
-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 raceway? - -4. 1
every 100ft
-How is stainless steel drilled out? - -Slow speed and constant pressure
-What is the required amount of retainer clips for wedge shackles and
what is the spacing? - -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? - -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? - -Finish side facing the cutting edge of the tool. Blade will burr the
backside
-How do you cut a finished floor? - -Cutting blade away from finished
side
-A 480vac stepdown 240vac transformer is connected to a 3 phase
rectifier, what is the output voltage? - -320vac
3 phase full wave = 1.33x output voltage
-A car is loaded with 125% and sinks, why? - -Slipping through the
break
-If you find a broken or missing barricade what should you do? - -Write
up a formal inspection request
, -What are the consequences of misaligned joints on a Rack and Pinion?
- -Broken Gear teeth. CWT derailment. Excessive wear/ crease the
surface of the tube
-A dumbwaiter is 9sqft in area, 4ft high, and capacity is 13.9lb/ft3. What
is total capacity? - -9 x 4 x 13.9= 500lbs Max capacity
-You must enter a pit with a toxic atmosphere, how do you proceed? - -
Following proper OSHA procedure with proper training and PPE
-When changing a 1:1 car rated at 600fpm and 2,000lb capacity to a
2:1, what are the new ratings? - -300fpm 4,000lbs capacity
Half the speed, Double the capacity
-A vertical platform lift has a clearance of 1 inch. How much will it have
to move to meet code? - -Move in ¼ inch. Code is ¾ inch
-A car weighs 2500lbs with a capacity of 2500lbs, the CWT is weighted
at 40%, how much is the motor lifting when the car is fully loaded? - -
2500(car) + 1000(40%) 3500. 5000-3500=1500lbs lifted by the
machine
-How must Oxygen and Acetylene tanks be stored? - -Vertically, 12 feet
apart, or on a cart with a ½ hour fire barrier between them
-What is code for sill to sill distance? - -Minimum ½ inch Maximum 1 ½
inches
-When drilling a jack hole in sandy conditions what type of drill rig is
required? - -Rotary or Auger bit. Rotary=Soft Percussion=Rocky
Combo=Solid
-A customer does not want an escape hatch on a residential elevator,
under what condition is this legal? - -Manual operation must be provided
-Your helper wired the down direction and final limit switches, now the
car will only travel up, what is the issue? - -The down direction limit was
wired incorrectly.
-What are the effects of one rope sitting deeper in the sheave groove? -
-The rope wears out and breaks faster
-There is a noise coming from a freight door. The sheave is moving, but
the chain is not. What is the problem? - -Oil on the drive chain
-What is the effect when you change a sling angle from 60 degrees to
30 degrees? - -More tension, less capacity. Any angle 30 or less is
dangerous
Review/216 Questions with
Verified Solutions/A+ Graded
A contractor wants to raise the car speed from 100fpm to 125fpm, it
currently has a 12" sheave. What sheave is required? - -Diam=12"
12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave
-A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read
voltage or resistance. What should you do? - -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? - -Suicide Circuit
-You have an old DC motor and are adding an SCR drive, what do you
do to the interpoles? - -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? - -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? -
-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? - -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? - -Adjust Tie Downs and Wall Ties
-Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting? - -400psi x 150%= 600psi
-What must be installed on a false car before operation? - -Spring
Loaded Safeties.
-There is slight arcing between the brush and commutator. What action
must be taken? - -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? - -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? - -
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? - -Traveling cable has a cut/exposed
wire or a short
-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 raceway? - -4. 1
every 100ft
-How is stainless steel drilled out? - -Slow speed and constant pressure
-What is the required amount of retainer clips for wedge shackles and
what is the spacing? - -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? - -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? - -Finish side facing the cutting edge of the tool. Blade will burr the
backside
-How do you cut a finished floor? - -Cutting blade away from finished
side
-A 480vac stepdown 240vac transformer is connected to a 3 phase
rectifier, what is the output voltage? - -320vac
3 phase full wave = 1.33x output voltage
-A car is loaded with 125% and sinks, why? - -Slipping through the
break
-If you find a broken or missing barricade what should you do? - -Write
up a formal inspection request
, -What are the consequences of misaligned joints on a Rack and Pinion?
- -Broken Gear teeth. CWT derailment. Excessive wear/ crease the
surface of the tube
-A dumbwaiter is 9sqft in area, 4ft high, and capacity is 13.9lb/ft3. What
is total capacity? - -9 x 4 x 13.9= 500lbs Max capacity
-You must enter a pit with a toxic atmosphere, how do you proceed? - -
Following proper OSHA procedure with proper training and PPE
-When changing a 1:1 car rated at 600fpm and 2,000lb capacity to a
2:1, what are the new ratings? - -300fpm 4,000lbs capacity
Half the speed, Double the capacity
-A vertical platform lift has a clearance of 1 inch. How much will it have
to move to meet code? - -Move in ¼ inch. Code is ¾ inch
-A car weighs 2500lbs with a capacity of 2500lbs, the CWT is weighted
at 40%, how much is the motor lifting when the car is fully loaded? - -
2500(car) + 1000(40%) 3500. 5000-3500=1500lbs lifted by the
machine
-How must Oxygen and Acetylene tanks be stored? - -Vertically, 12 feet
apart, or on a cart with a ½ hour fire barrier between them
-What is code for sill to sill distance? - -Minimum ½ inch Maximum 1 ½
inches
-When drilling a jack hole in sandy conditions what type of drill rig is
required? - -Rotary or Auger bit. Rotary=Soft Percussion=Rocky
Combo=Solid
-A customer does not want an escape hatch on a residential elevator,
under what condition is this legal? - -Manual operation must be provided
-Your helper wired the down direction and final limit switches, now the
car will only travel up, what is the issue? - -The down direction limit was
wired incorrectly.
-What are the effects of one rope sitting deeper in the sheave groove? -
-The rope wears out and breaks faster
-There is a noise coming from a freight door. The sheave is moving, but
the chain is not. What is the problem? - -Oil on the drive chain
-What is the effect when you change a sling angle from 60 degrees to
30 degrees? - -More tension, less capacity. Any angle 30 or less is
dangerous
