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S.O.S EXAM GUIDE QUESTIONS WITH COMPLETE ANSWERS
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S.O.S EXAM GUIDE QUESTIONS WITH COMPLETE ANSWERS
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ELEVATOR MECHANIC EXAM REVIEWQUESTIONS WITH COMPLETE
A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12"
sheave. What sheave is required? - Answer-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? - 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? - Answer-Cutting blade away from finished side
A 480vac stepdown 240vac transformer is connected to a 3 phase rectifier, what is the
output voltage? - Answer-320vac
3 phase full wave = 1.33x output voltage
A car is loaded with 125% and sinks, why? - Answer-Slipping through the break
If you find a broken or missing barricade what should you do? - Answer-Write up a
formal inspection request
What are the consequences of misaligned joints on a Rack and Pinion? - Answer-
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?
- Answer-9 x 4 x 13.9= 500lbs Max capacity
, You must enter a pit with a toxic atmosphere, how do you proceed? - Answer-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? - Answer-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? - Answer-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? - Answer-2500(car) + 1000(40%)
3500. 5000-3500=1500lbs lifted by the machine
How must Oxygen and Acetylene tanks be stored? - Answer-Vertically, 12 feet apart, or
on a cart with a ½ hour fire barrier between them
What is code for sill to sill distance? - Answer-Minimum ½ inch Maximum 1 ½ inches
When drilling a jack hole in sandy conditions what type of drill rig is required? - Answer-
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? - Answer-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? - Answer-The down direction limit was wired incorrectly.
What are the effects of one rope sitting deeper in the sheave groove? - Answer-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? - Answer-Oil on the drive chain
What is the effect when you change a sling angle from 60 degrees to 30 degrees? -
Answer-More tension, less capacity. Any angle 30 or less is dangerous
How many points of a contact must be maintained on a ladder? How far above landing
must it extend? What is proper Ratio? What steps don't we use? - Answer-3 points of
contact. 3 foot above. 4:1. Top 2 steps
You open a dumbwaiter access panel and it still runs, what is the problem? - Answer-Pit
access switch is not working properly
You perform a static load test with the pit valve closed. The car sinks 6" in 15 minutes.
What is the problem? - Answer-Cylinder leak
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