Elevator Mechanic Exam Review Correct
Questions & Answers
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
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
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
Generator runs at 600rpm and has 4 poles, what is the output frequency? - ANSWER
20hz
600/60=10 10x2=20 RPM 60 x frequency / pole/2
How many wires are needed for the following circuit? Exclude spares.
BCE---SPI/BCD---SP2/BCD---SP4/BCD---UR1/BCE---UR2/BCE---DR1/CRE---
DR2/GRD - ANSWER 11 wires. You do not need the duplicates
How must a 9 lead 480/240 motor be wired for High Voltage? - ANSWER L1(1) L2(2)
L3(3) Low Voltage L1(1-7) L2(2- 8) L3(3-9) 7-4 8-6 9-5 4 5 6 + 120v______0-------
0_______R2________A_________R1_______GRD
There is voltage at the switch, but none at A, what is wrong? - ANSWER Open at R2 or
R1
The close door limit switch is not working, you have power at points 35-8, no voltage at
1-S2 why? - ANSWER Door limit switch malfunction
The step level switch on an escalator has been tripped, where do you check? -
ANSWER Upper and Lower Truss assemblies, trips if step sags more than 1/8th inch
A motor needs a sleeve bearing replaced, what type of bearing do you need? -
ANSWER Friction bearing AKA Sleeve bearing.
Anti-Friction Bearing AKA Ball bearing
What type of safeties are required on a 300fpm car? - ANSWER Type B wedge clamp
, What stopping devices are required on vertical platforms? - ANSWER 2 pan switches.
15lbs max pressure
What are the most common features of Load Weigh? - ANSWER Control generator field
and Inside express operation
At what distance from closed does the gate switch operate? - ANSWER 2 inches
If the DC output of a 3 phase rectifier is lower than specified, what is the problem? -
ANSWER AC fuse is blown.
1 input phase is missing
What is the overlap minimum on 2 & 3 speed doors? - ANSWER Horizontal ½ inch
Vertical 1 inch
What are minimum and maximum clearance between sill and car doors? - ANSWER ¼
inch Minimum 3/8-inch Maximum
What is maximum leading edges for center opening doors? - ANSWER ½ inch
What is minimum sill to gib engagement? - ANSWER ¼ inch
What is minimum and maximum sill to sill gap? - ANSWER ½ inch to 1 ½ inch
1 gallon equals how many cubic feet? - ANSWER .134 cubic feet
What type of oil do you put in a machine? - ANSWER Gear oil, non-detergent, single
viscosity
If a Rack and Pinion hoist is not plumb, level and square. What can happen? -
ANSWER Set the Safeties
What are extension tubes used for? - ANSWER Necessary clearance for placement of
concrete forms.
If a hoist motor is making noise, what is the problem? - ANSWER 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? - ANSWER Pie x Radius Squared= Area
3.14x5x5=78.5
The escape hatch opens in what direction? - ANSWER From the outside of the car up,
preventing people from getting on top of the car
Questions & Answers
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
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
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
Generator runs at 600rpm and has 4 poles, what is the output frequency? - ANSWER
20hz
600/60=10 10x2=20 RPM 60 x frequency / pole/2
How many wires are needed for the following circuit? Exclude spares.
BCE---SPI/BCD---SP2/BCD---SP4/BCD---UR1/BCE---UR2/BCE---DR1/CRE---
DR2/GRD - ANSWER 11 wires. You do not need the duplicates
How must a 9 lead 480/240 motor be wired for High Voltage? - ANSWER L1(1) L2(2)
L3(3) Low Voltage L1(1-7) L2(2- 8) L3(3-9) 7-4 8-6 9-5 4 5 6 + 120v______0-------
0_______R2________A_________R1_______GRD
There is voltage at the switch, but none at A, what is wrong? - ANSWER Open at R2 or
R1
The close door limit switch is not working, you have power at points 35-8, no voltage at
1-S2 why? - ANSWER Door limit switch malfunction
The step level switch on an escalator has been tripped, where do you check? -
ANSWER Upper and Lower Truss assemblies, trips if step sags more than 1/8th inch
A motor needs a sleeve bearing replaced, what type of bearing do you need? -
ANSWER Friction bearing AKA Sleeve bearing.
Anti-Friction Bearing AKA Ball bearing
What type of safeties are required on a 300fpm car? - ANSWER Type B wedge clamp
, What stopping devices are required on vertical platforms? - ANSWER 2 pan switches.
15lbs max pressure
What are the most common features of Load Weigh? - ANSWER Control generator field
and Inside express operation
At what distance from closed does the gate switch operate? - ANSWER 2 inches
If the DC output of a 3 phase rectifier is lower than specified, what is the problem? -
ANSWER AC fuse is blown.
1 input phase is missing
What is the overlap minimum on 2 & 3 speed doors? - ANSWER Horizontal ½ inch
Vertical 1 inch
What are minimum and maximum clearance between sill and car doors? - ANSWER ¼
inch Minimum 3/8-inch Maximum
What is maximum leading edges for center opening doors? - ANSWER ½ inch
What is minimum sill to gib engagement? - ANSWER ¼ inch
What is minimum and maximum sill to sill gap? - ANSWER ½ inch to 1 ½ inch
1 gallon equals how many cubic feet? - ANSWER .134 cubic feet
What type of oil do you put in a machine? - ANSWER Gear oil, non-detergent, single
viscosity
If a Rack and Pinion hoist is not plumb, level and square. What can happen? -
ANSWER Set the Safeties
What are extension tubes used for? - ANSWER Necessary clearance for placement of
concrete forms.
If a hoist motor is making noise, what is the problem? - ANSWER 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? - ANSWER Pie x Radius Squared= Area
3.14x5x5=78.5
The escape hatch opens in what direction? - ANSWER From the outside of the car up,
preventing people from getting on top of the car
