Elevator Mechanic Exam | 100%
Correct Answers | A+ Guide
• 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
• 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
• Generator runs at 600rpm and has 4 poles, what is the output
frequency? -✓✓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 -✓✓11 wires. You do not need the duplicates
• How must a 9 lead 480/240 motor be wired for High Voltage? -
✓✓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? -✓✓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? -✓✓Door limit switch malfunction
, • 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
• 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
• 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 are the most common features of Load Weigh? -✓✓Control
generator field and Inside express operation
• At what distance from closed does the gate switch operate? -✓✓2
inches
• 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 ½
inch Vertical 1 inch
• What are minimum and maximum clearance between sill and car
doors? -✓✓¼ inch Minimum 3/8-inch Maximum
• What is maximum leading edges for center opening doors? -✓✓½ inch
Correct Answers | A+ Guide
• 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
• 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
• Generator runs at 600rpm and has 4 poles, what is the output
frequency? -✓✓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 -✓✓11 wires. You do not need the duplicates
• How must a 9 lead 480/240 motor be wired for High Voltage? -
✓✓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? -✓✓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? -✓✓Door limit switch malfunction
, • 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
• 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
• 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 are the most common features of Load Weigh? -✓✓Control
generator field and Inside express operation
• At what distance from closed does the gate switch operate? -✓✓2
inches
• 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 ½
inch Vertical 1 inch
• What are minimum and maximum clearance between sill and car
doors? -✓✓¼ inch Minimum 3/8-inch Maximum
• What is maximum leading edges for center opening doors? -✓✓½ inch
