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Elevator Mechanic Exam Review
2025 /2026 EXAM UPDATE: GRADED A
COMPLETE, FULL-LENGTH EXAM WITH
CORRECT ANSWERS
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?
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 Ā¼ inch. Code is Ā¾ 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 Ā½ hour fire barrier between them
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?
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?
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?
Cylinder leak
Where should you aim a fire extinguisher to put out a fire?
At the base of the fire
Car with selective collective system is moving to the lobby to take a call, an up call is put in at the 2nd floor, what happens?
The call is bypassed until the car is traveling up
During construction you land an escalator, but it is 10mm low, what is wrong?
The pit is too deep or column MARK is off
During construction the Omega CWT rails have been damaged, what happened?
The Omegas were over tightened
How do you handle a co-worker who shows up drunk?
Speak with MIC, Call BA, call supervisor
How do you attach brackets to brick?
Inserts set back a Ā¼ inch into the block. Code could call for through bolts
What is Selective Collective System?
Controller that allows an elevator to bypass calls in the opposite direction of travel.
Generator runs at 600rpm and has 4 poles, what is the output frequency?
20hz
600/60=10 10x2=20 RPM 60 x frequency / pole/
If a XOR gate was connected to a NOR gate and attached to an AND gate with a High output. What is input of the XOR gate A&B?
Both must be High
Using BINARY logic, what DIP switches must be on for a 128 bit 30 second timer set at 150%
1,3,4,6=45 seconds
TRU 9/8 open
2nd floor PI lights then quickly shuts off, why?
X1 4-
Car will not travel to 2 without a 3 call, and will not go down to 3 without a 2 call?
2F1 4-
Sheet 3, why wont the motor start?
MOL1 T/B
The step level switch on an escalator has been tripped, where do you check?
Upper and Lower Truss assemblies, trips if step sags more than 1/8th inch
You get a trouble call for an inoperable freight door. What must you do before you begin work?
Block open the door. LOTO. Barricades
You get shocked when attempting to move a car with a temp run bug, what is the problem?
Ground wire not hooked up
A motor needs a sleeve bearing replaced, what type of bearing do you need?
Friction bearing AKA Sleeve bearing.
Anti-Friction Bearing AKA Ball bearing
7-foot platform with inside cab clearance of 6'8", what is the thickness of the cab walls?
2-inch-thick walls
You notice Roughing on the Gov and Tail Sheave. What should you check?
Rope Diameter
Car doors are dragging in the sill, how high should the car doors be above the sill?
Ā¼ inch
What type of safeties are required on a 300fpm car?
Type B wedge clamp
What stopping devices are required on vertical platforms?
2 pan switches. 15lbs max pressure
What type of oil is required for sleeve bearings?
Single viscosity SAE 20
What is the maximum inclination for moving walks?
12 degrees
What is the maximum length Motor-Generator leads can be outside of a controller?
6 feet
In what section of NEC is elevator, escalator, moving walks, and dumbwaiters?
Article 620
What is the ratio between the loop and diameter of a round traveler?
30 times
What are the most common features of Load Weigh?
Control generator field and Inside express operation
What is required by ASME on the car top?
Inspection station, Light, and Duplex outlet.
At what distance from closed does the gate switch operate?
2 inches
What is the minimum number of spares that should be pulled?
10 %
At what speed should the Gov. switch contact be set to open?
Electrical 90% of Tripping speed for 150fpm-500fpm. 95% for +500fpm
If the DC output of a 3 phase rectifier is lower than specified, what is the problem?
AC fuse is blown.
1 input phase is missing
What is the overlap minimum on 2 & 3 speed doors?
Horizontal Ā½ inch Vertical 1 inch
What are minimum and maximum clearance between sill and car doors?
Ā¼ inch Minimum 3/8-inch Maximum
What is maximum leading edges for center opening doors?
Ā½ inch
What is minimum sill to gib engagement?
Ā¼ inch
What is minimum and maximum sill to sill gap?
Ā½ inch to 1 Ā½ inch
On a geared machine the worm and worm gear are made out of what materials?
Steel and Bronze
What is the purpose of a gear reduction unit on a geared machine?
Increased lifting capacity
What holds a stopped Hydraulic elevator?
Check valve
What must be done if you get on top of a dumbwaiter?
Never fully get on top. Work only partially on with the mainline disconnect off
How do you measure an escalator hand rail?
Mark the top and bottom of the inclination, measure in between and move the car until the bottom mark is at the top, measure again and continue doing this until you see your 1st mark. The last measurement will be shorter. Add all the measurements together to get your length.
A moving walk has an inclination of 10degrees, what is the highest angle it can be?
12degrees escalator 31degrees
In a Ward-Leonard system, if all 3 contacts close what will happen?
The car will run at full speed
What type of oil do you put in a machine?
Gear oil, non-detergent, single viscosity
A 75ohm resistor has blown, no replacement, how do you fix it?
3-225ohm resistors in parallel.
3-25ohm resistors in series
If a Rack and Pinion hoist is not plumb, level and square. What can happen?
Set the Safeties
What are extension tubes used for?
Necessary clearance for placement of concrete forms.
If a hoist motor is making noise, what is the problem?
To help prevent distortion to the building AC supply, INDUCTORS can be used on AC input of a solid state drive. Inductors can serve double duty, they operate as Transformers, to match input voltage, or provide voltage isolation. As well as performing filtering on notch effect.
What is the area of a 10" plunger?
Pie x Radius Squared= Area 3.14x5x5=78.
The escape hatch opens in what direction?
You are working on a MOD and have to move the controller 30 feet farther away, you notice voltage drop, what can be done to increase voltage?
Use a larger gauge of wire
What is the weight of normal rails? 15 full 16' rails and 2 8' rails
16 x 16' x 15lbs = 3840lbs
What is an acceptable substitute for the top rail of a barricade?
Ā¼ inch thick wire rope
What is the proper way to test incoming voltage?
3 phase AC using digital meter: L1-L2 L1-L3 L2-L
Hydro at pump starter. Traction at L1, L2, L
When replacing a PCB in a controller what precautions must be taken?
Use a grounding wrist strap, and never remove anything with the power on
Who gives you a right to a safe work space?
OSHA
On an ANNUAL static load test, the car drifts down 15" in 10 minutes. There is no visible oil in the pit, where is the leak coming from?
Underground. Annual static test required for unexposed cylinders
What training must be done before you can enter a pit that has been classified as a confined space?
Confined space entrant training
Traction and Hydraulic machines have many hazards, what is most dangerous?
Rotating Equipment
You are installing a machine and sheave, where would machine and secondary sheaves be aligned?
In the center of the Rail measurements
You are testing an elevator with a rated speed of 500fpm. What is the minimum speed the safeties should set at?
575fpm. Mechanical:115% x 500=575. Electrical:90% x 575=517.5fpm
What is one of the most dangerous Hazards in the trade and most obvious for us?
FALLS
You are installing machines, governors, and generators, and need to know the location where it needs installed. Where would you find the information?
The machine room plan view
What is the minimum breaking strength of a wire rope used as Life Safety?
