Elevator Mechanic (ELEVATORMECHANIC)

1. 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 2. 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 3. 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 4. You have an old DC ...

Elevator Mechanic Exam Review Questions with 100% Correct Answers – COMPLETE SOLUTION. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? - CORRECT ANSWER 125/100=1.25x12"=15" sheave A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - CORRECT ANSWER Check circuit voltage On a Ward-Leonard circuit the break is set, but the motor is trying to s...

E=__ Correct Answer: IR P=__ Correct Answer: IE Pie r^2 = Correct Answer: Area of a circle 231 in^3 /____ Correct Answer: gal. 25.4mm/__ Correct Answer: in. 2.2kg/ Correct Answer: lb 3 phase rectifier output = Correct Answer: 1.33 x input single phase output = Correct Answer: 0.9 x input RMS (effective voltage) = Correct Answer: 0.707 (PEAK V) TC = Correct Answer: R x C (5)??? RPM = Correct Answer: 60 (frequency) / (poles/2) door overlap minimum = Corr...

If the pulley falls off a door operator, what likely happened? Correct Answer: The set screw probably came out When replacing a circuit board in a controller, what should you do after the power is off? A) use a surge protector, B) Use the proper PPE, C) Use a grounding wrist strap. Correct Answer: C) Use a grounding wrist strap What are demarcation lights used for on escalators? Correct Answer: To give a visual indication of the gap between steps at the lower and upper ends. Who give...

Which of the following is a term used to describe a body harness used in conjunction with a shock absorbing lanyard? Correct Answer: Personal fall arrest system A mechanic is working on a construction job, and finds the carpenter using a powder activated tool to anchor wall track. Of the following, which precaution should the mechanic take? Correct Answer: Wear hearing protection Which is the best way to communicate with your coworkers while you are in the machine room and they are worki...

In a modernization they plan on moving the controller 30 feet away which ends up resulting in a voltage drop. What do you do? A) Call electric company for a step-up transformer, B) Use a bigger wire. Correct Answer: B) Use a bigger wire. Governor trips at 115% of rated speed, the over speed switch trips at 90% of the 115%. Correct Answer: If you are cutting something with a power saw, which way does piece you are cutting face. Up or down? Correct Answer: Down. They give you a voltag...

Car running up keep stopping why? Correct Answer: Contact is not deenergizing in push button Third-floor bulbs burn out why? Correct Answer: Shorted resistor Car will not travel to second floor without a third-floor me a call and will not go down from three without a second-floor hall, what's the problem? Correct Answer: 2Fl 4/6 Why won't motor start? Correct Answer: MOL1 95/96 Car doors closed and won't run what do you check? Correct Answer: Check for voltage at four and fiv...

ASME Correct Answer: American Society of Mechanical Engineers DOSH Correct Answer: Division of Occupational Safety and Health LADBS Correct Answer: Los Angeles Department of Building and Safety Alteration made to conveyance shall comply with ASME A17.1-204 Section Correct Answer: 8.7 The seismic section of ASME A17.1-2004 and alterations made to conveyances must also comply with this section Correct Answer: 8.4 What must be submitted to the applicable Division Elevator office...

A Latching relay: Used for call registration,direction selection or as selector relays Two types are: Set/Rest are electrical and Mechanical Latching relays Need to know latching relay symbol, Its a box with shaded triangle in lower right hand corner. Correct Answer: Which relay do you need to Order 710 Pg, 7 RPM = 60 ∙ ƒ ÷ P÷2 = Step 1. 60 x Frequency (Hz.) = Step 2. Poles ÷ 2 = Take answer 1 and ÷ by answer 2 = Correct Answer: Know the formula for RPM 435 Pg. 5 If y...

RPM formula Correct Answer: 60 x (Frequency) / (P/2) # of counterweights formula Correct Answer: CWT Governor Tripping Speed Correct Answer: Tripping speed should be 10% Higher then Car Govt Tripping Speed Total CWT weight equals? Correct Answer: Generally weight of the car plus 40% of capacity load. EX. 5000lb car with 2000lb capacity. CWT = 5k + 800(40% x 2k) = 5800 Watts (P) Correct Answer: ExI RxI^2 E^2/R Volts (E) Correct Answer: RxI P/I Square root of PxR Amps ...