Elevator Mechanic Exam Review Latest Update

Elevator Mechanic Exam Review Latest Update -400 Questions and 100% Verified Correct Answers Guaranteed A+

1 gallon equals how many cubic feet? - CORRECT ANSWER: .134 cubic feet

• controllers in a small machine room face each other, what is the minimum clearance

between them? - CORRECT ANSWER: 36 inches

2nd floor PI lights then quickly shuts off, why? - CORRECT ANSWER: X1 4-6

7-foot platform with inside cab clearance of 6'8", what is the thickness of the cab walls?

- CORRECT ANSWER: 2-inch-thick walls

A 300ohm resistor burns out, but you don't have another one. How can you make one? - CORRECT ANSWER: 2 600ohm resistors in parallel is 300ohms. Resistance is half of highest resistor in parallel circuit.

• 225ohm resistors in parallel is 75ohms.

A 480vac stepdown 240vac transformer is connected to a 3 phase rectifier, what is the

output voltage? - CORRECT ANSWER: 320vac

• phase full wave = 1.33x output voltage

A 75ohm resistor has blown, no replacement, how do you fix it? - CORRECT ANSWER: 3-225ohm resistors in parallel.3-25ohm resistors in series

A car is loaded with 125% and sinks, why? - CORRECT ANSWER: Slipping through the break

• / 4

A car traveling in the hoistway always stops at the same spot and blows a fuse. What causes this? - CORRECT 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? - CORRECT 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? - CORRECT 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? - CORRECT 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? - CORRECT ANSWER: 10,500lbs

10,000 x 5 / 100= 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? - CORRECT 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?

- CORRECT 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? - CORRECT 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? -

CORRECT ANSWER: The relief valve is set too low

• / 4

A motor needs a sleeve bearing replaced, what type of bearing do you need? -

CORRECT 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? - CORRECT ANSWER: Replace it with a larger MOV

A moving walk has an inclination of 10degrees, what is the highest angle it can be? -

CORRECT ANSWER: 12degrees escalator 31degrees

A vertical platform lift has a clearance of 1 inch. How much will it have to move to meet

code? - CORRECT 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? - CORRECT ANSWER: Not code. Code is 30lb or less. To fix it you need to adjust the torque/speed of door operator

Amplifiers: - CORRECT 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? - CORRECT ANSWER: Column LINE

At what distance from closed does the gate switch operate? - CORRECT ANSWER: 2

inches

At what speed should the Gov. switch contact be set to open? - CORRECT ANSWER:

Electrical 90% of Tripping speed for 150fpm-500fpm. 95% for +500fpm

Before you can move a piston on a hydro, what precautions must be taken? - CORRECT ANSWER: Check the piston for debris and tightness of the head, make sure pit is clear 3 / 4

Car doors are dragging in the sill, how high should the car doors be above the sill? -

CORRECT ANSWER: ¼ inch

Car is running normally, but the Fire Service buzzer will not shut off, Why? - CORRECT

ANSWER: EHP 3-2 shorted

Car weighs 7,000lbs with a capacity of 3,500lbs. what does the CWT weigh? -

CORRECT ANSWER: 8,400lbs

3500 x 40 / 100=1,400lbs

7,000 + 1,400 = 8,400

Car will not travel to 2 without a 3 call, and will not go down to 3 without a 2 call? -

CORRECT ANSWER: 2F1 4-6

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? - CORRECT ANSWER: The call is bypassed until the car is traveling up

Customer complains that elevator is having door problem at every floor. Where do you

start trouble shooting? - CORRECT ANSWER: The car doors

Customer is complaining that an older SCR drive powered elevator, is causing noise in

the building power lines. What can help reduce the noise? - CORRECT ANSWER:

Isolation Transformer: Used to minimize electrical noise from being reflected back to supply lines

During construction the Omega CWT rails have been damaged, what happened? -

CORRECT ANSWER: The Omegas were over tightened

During construction you land an escalator, but it is 10mm low, what is wrong? - CORRECT ANSWER: The pit is too deep or column MARK is off

• / 4