Elevator Mechanic Exam Review
1 gallon equals how many cubic feet? - ANSWER ✔ .134 cubic feet
2 controllers in a small machine room face each other, what is the minimum clearance
between them? - ANSWER ✔ 36 inches
2nd floor PI lights then quickly shuts off, why? - ANSWER ✔ X1 4-6
7-foot platform with inside cab clearance of 6'8", what is the thickness of the cab walls?
- ANSWER ✔ 2-inch-thick walls
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.
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 75ohm resistor has blown, no replacement, how do you fix it? - ANSWER ✔ 3-
225ohm resistors in parallel.
3-25ohm resistors in series
A car is loaded with 125% and sinks, why? - ANSWER ✔ Slipping through the break
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
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
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 customer does not want an escape hatch on a residential elevator, under what
condition is this legal? - ANSWER ✔ Manual operation must be provided
A CWT frame weighs 10,000lbs and needs to be increased by 5%. What is the new
weight of the frame? - ANSWER ✔ 10,500lbs
10,000 x = 500lbs +10,000 = 10,500lbs
,A DC door motor supplied from a 3 phase rectifier runs slow. The DC voltage is
normally 320 is 220. What should you do? - ANSWER ✔ Check the fuse feeding the AC
rectifier
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
A force of 5,000lbs is applied to a plunger with an area of 25sqin. What is system
pressure? - ANSWER ✔ 200psi
500/25 PRESSURE=FORCE/AREA AREA=FORCE/PRESSURE
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
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
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
, A moving walk has an inclination of 10degrees, what is the highest angle it can be? -
ANSWER ✔ 12degrees escalator 31degrees
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
After receiving an inspection report, one violation is door closing force. After checking
you read 50lb of door force, is this code? How do you make it code compliant? -
ANSWER ✔ Not code. Code is 30lb or less. To fix it you need to adjust the
torque/speed of door operator
Amplifiers: - ANSWER ✔ Inverting: Op amp(input) supplied to. NEGATIVE Non
inverting: Input. POSITIVE
As a mechanic you are sent to install an escalator, what point of reference would you
use to square the unit? - ANSWER ✔ Column LINE
At what distance from closed does the gate switch operate? - ANSWER ✔ 2 inches
At what speed should the Gov. switch contact be set to open? - ANSWER ✔ Electrical
90% of Tripping speed for 150fpm-500fpm. 95% for +500fpm
1 gallon equals how many cubic feet? - ANSWER ✔ .134 cubic feet
2 controllers in a small machine room face each other, what is the minimum clearance
between them? - ANSWER ✔ 36 inches
2nd floor PI lights then quickly shuts off, why? - ANSWER ✔ X1 4-6
7-foot platform with inside cab clearance of 6'8", what is the thickness of the cab walls?
- ANSWER ✔ 2-inch-thick walls
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.
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 75ohm resistor has blown, no replacement, how do you fix it? - ANSWER ✔ 3-
225ohm resistors in parallel.
3-25ohm resistors in series
A car is loaded with 125% and sinks, why? - ANSWER ✔ Slipping through the break
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
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
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 customer does not want an escape hatch on a residential elevator, under what
condition is this legal? - ANSWER ✔ Manual operation must be provided
A CWT frame weighs 10,000lbs and needs to be increased by 5%. What is the new
weight of the frame? - ANSWER ✔ 10,500lbs
10,000 x = 500lbs +10,000 = 10,500lbs
,A DC door motor supplied from a 3 phase rectifier runs slow. The DC voltage is
normally 320 is 220. What should you do? - ANSWER ✔ Check the fuse feeding the AC
rectifier
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
A force of 5,000lbs is applied to a plunger with an area of 25sqin. What is system
pressure? - ANSWER ✔ 200psi
500/25 PRESSURE=FORCE/AREA AREA=FORCE/PRESSURE
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
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
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
, A moving walk has an inclination of 10degrees, what is the highest angle it can be? -
ANSWER ✔ 12degrees escalator 31degrees
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
After receiving an inspection report, one violation is door closing force. After checking
you read 50lb of door force, is this code? How do you make it code compliant? -
ANSWER ✔ Not code. Code is 30lb or less. To fix it you need to adjust the
torque/speed of door operator
Amplifiers: - ANSWER ✔ Inverting: Op amp(input) supplied to. NEGATIVE Non
inverting: Input. POSITIVE
As a mechanic you are sent to install an escalator, what point of reference would you
use to square the unit? - ANSWER ✔ Column LINE
At what distance from closed does the gate switch operate? - ANSWER ✔ 2 inches
At what speed should the Gov. switch contact be set to open? - ANSWER ✔ Electrical
90% of Tripping speed for 150fpm-500fpm. 95% for +500fpm
