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Elevator Mechanics Review | 100% Correct
Answers | Verified | Latest 2024 Version
Car running up keep stopping why? - ✔✔Contact is not deenergizing in push button Third-floor bulbs burn out why? - ✔✔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? - ✔✔2Fl 4/ Why won't motor start? - ✔✔MOL1 95/ Car doors closed and won't run what do you check? - ✔✔Check for voltage at four and five Bad Transistor Top barricade can be replaced with? - ✔✔1/4" Cable There is voltage at the switch but none at point a what's wrong? - ✔✔Either R1 or R2 open The door close limit switch is not working do you have power from 35 to term eight. No power from 1 to 52 why? - ✔✔Door limit switch malfunction Car running normally but the buzzer will not shut off why? - ✔✔EHP 2/3 shorted Relay STR has voltage. TRU has voltage, RU has no voltage, why? - ✔✔TRU 9/ Second floor PI illuminates then quickly extinguishes why? - ✔✔X1 4/
On a machine, what is drilled out first? - ✔✔Secondary sheave Dumb waiter takes off before loading why? - ✔✔Non interference Car levels in 3 inches high in down direction why? - ✔✔Counterweight In bi-parting doors what gap is allowed before gate switch is open? - ✔✔3/4" Pressure switch is wired in what direction - ✔✔Down directional What is the tripping speed of counterweight governor? - ✔✔No more than 10% higher There is excessive sparking on generator why? - ✔✔High Micha How does interpoles affect the Armature? - ✔✔Reaction What is the maximum door closing force? - ✔✔30 lbs and 7 lbs kinetic What do you do before replacing a relay on a controller? - ✔✔LOTO, Test, and Verify When are spring buffers used? - ✔✔Less than 200fpm What are SCR's good for? - ✔✔They are quieter and make less vibration then motor generator set You have a 200 ohm resistor at 200 Watts what do you replace it with? - ✔✔75 ohm 200 watt adjustable resistor
What is the boom out signal? - ✔✔Arms out, thumbs out If there is high screeching, what should you check? - ✔✔SCR drive What do you install first on a running platform? - ✔✔Governor You have 52 traveling cables terminating in the controller how many total wires do you need? - ✔✔ 58 If rigging a motor into overhead, what type of rigging to prevent it from spinning? - ✔✔Tagline, hoisting jack To run a freight car bi-parting doors must be? - ✔✔Closed and locked Lula clearance per code? - ✔✔3/4" A circuit that has permitted the elevator bypass up calls as the elevator travels down and vice versa? - ✔✔Selective collective control How many millimeters in 1 inch? - ✔✔25. What drawings are for physical components? - ✔✔Final layout Relieve pressure on a Hydro? - ✔✔150% of working pressure What is the strongest type of rope? - ✔✔Seale rope You do a buffer test, what is acceptable time for it to retract? - ✔✔60 sec
What do you use to keep a machine from moving side to side? - ✔✔Kick angle What is one of the first things you would do when doing a re-pack? - ✔✔Pit stands, check cylinder for nicks and scratches At what degree are two leg bridal hitches most safe? - ✔✔ 60 ° You are using a 4K lbs capacity hoist with a 4:1 set up, What's the max you can lift? - ✔✔16K Governor tripping speed? - ✔✔115% mechanical, electrical 10% less Hoist has no data tag, what do you do? - ✔✔Remove from service Car going down to the lobby, a first floor call and up call placed on second floor, what happens? - ✔✔Call bypassed How much oil is required to lift a car with a 4 inch plunger, 25 feet? - ✔✔36.7 gallons You get to a job where there is low voltage to a motor after a mod, during which the main line was Moved 30 feet away, what's the fix? - ✔✔Increase wire size How do you use a multi meter to measure amperage? - ✔✔In series, circuit open How do you use a multi meter to measure voltage? - ✔✔In parallel, power on How do you use a megger to test a motor? - ✔✔Disconnect connections 3 phase degree of separation? - ✔✔ 120 °
Ward Leonard system generator shot field incline resistors, how do they affect car speed as they are added and removed? - ✔✔Adding decreases speed, removing increase speed New Hydro trouble car, car will not run up with a lot of people in it, what's wrong? - ✔✔Relief valve set to low Hydro top call is placed and car returns to bottom floor without making it to the top what's wrong? - ✔✔Low oil timer If the DC output of a three phase rectifier is lower than specified, what's wrong? - ✔✔One input phase missing What is the minimum overlap on two and three speed doors? - ✔✔5/8" What is the max distance clearance between door and sill? - ✔✔3/8" max What is the max gap of the leading edge of center opening doors? - ✔✔1/2" What is the minimum Gibb to sill engagement? - ✔✔1/4" What is the max gap sill to sill? - ✔✔1 1/2" 1 gallon equals how many cubic inches? - ✔✔ 231 A force of 5000 pounds is applied to a plunger with an area of 25 ft.². What is system pressure? - ✔✔ 200 psi In what section of national elevator code is elevator/escalator code found? - ✔✔ 620
What is the maximum length of motor generator leads that can be to the controller without raceway? - ✔✔6 feet What is the smallest wire allowed in a traveling cable? - ✔✔20awg What is the ratio between diameter and a loop of traveler? - ✔✔30 times the diameter What is required by ASME on the car top? - ✔✔Inspection station, light, duplex receptacle What are the most common features of load weigh? - ✔✔Control the generator field and express operation At what distance from the closed doors does the gate switch operate? - ✔✔2" What is the minimum number of spares that should be pulled? - ✔✔10% At what speed should the governor switch contact be set to open? - ✔✔90% of mechanical How do you test a safety circuit? - ✔✔Test all switches independently What is the max moving walkway incline? - ✔✔ 12 ° How does a GFCI work? - ✔✔Detects an imbalance between hot and neutral Who is required to provide you with MSDS or SDI sheets? - ✔✔Your employer How do emergency doors swing? - ✔✔Outward You have an EMT run with 3-90°, 2-45° and a saddle.What's required? - ✔✔A pull box
Using binary logic, what dip switches need to be in the on position of a 128 bit 30 second timer set at 150%? - ✔✔45 sec How must a nine lead 480/240 motor be wired for low-voltage? - ✔✔ 1 - 7 2 - 8 3 - 9 4 - 5 - 6 The step level switch on an escalator has been activated, where do you check? - ✔✔Both top and bottom switches You get a trouble call for in-op freight doors, what must you do before you begin work? - ✔✔Block the doors open Where should you point a fire extinguisher? - ✔✔Base of the fire A car with a selective collective controller is moving to the lobby to pick up a call. An up call is put in at the second floor, what happens? - ✔✔Call is bypass till the car goes in Up direction During construction you land an escalator, but it's 10 mm too low, what's wrong? - ✔✔Column Mark is off During construction the Omega counterweight rails are damaged why? - ✔✔Over tightening from rail to bracket How do you handle a coworker who shows up intoxicated? - ✔✔Speak to MIC, foreman, union BA How do you attach brackets to brick? - ✔✔Insert 1/4" back from brick
What is a selective collective control system? - ✔✔A controller that allows an elevator to bypass calls in the opposite direction Given a generator runs at 600 ft./min. and has four poles, what is output frequency? - ✔✔20 Hz You wire the down direction and final limit switches. Now the car only runs up, what is the problem? - ✔✔Wire down direction limit wrong What are the effects of one Rope sitting deeper in the sheave groove? - ✔✔The rope wears out and brakes faster There is a noise coming from a freight door. The Sheave is moving but the chain is not what is the problem? - ✔✔Too much oil What is the effect when you change a sling angle from 60° to 30°? - ✔✔More tension, less capacity How many points of contact must be maintained on a ladder? - ✔✔3 points of contact You open a dumb waiter access door and it still runs, what's the issue? - ✔✔Pit access switch not working You perform a static low test with the pit valve closed the car sinks 6 inches in 15 minutes what's the issue? - ✔✔Cylinder leak A vertical platform lift has a clearance of 1 inch how much will it have to be moved to meet code? - ✔✔1/4" A car Waze 2500 pounds with a capacity of 2500 pounds. The counterweight is weighted at 40%, how much is the motor lifting? - ✔✔1,500 lbs How much oxygen and acetylene tanks be stored? - ✔✔Vertically, 12 feet apart
How many strains supports are required in a 350 foot race way - ✔✔ 4 How is stainless steel drilled out? - ✔✔Slow speed at constant pressure What are the Required amount of clips for wedge shackles and what is their spacing? - ✔✔Two clips First is 4X the diameter of rope from shackle Second is 8X the diameter of rope from 1st clip A 300 ohm Resistor burns out. You don't have a 300 ohms resistor, what can you use to make it up? - ✔✔ 3 - 225ohm resistors You need to work on a freight door retiring cam. LOTO mainline, but there is still power to the CAM. What circuit is hot? - ✔✔Door operator mainline The contractor request that the vertical center of the rack and Pinion hoist be moved. How is this accomplished? - ✔✔Adjust tiedowns/wall ties generally every 10 to 30 feet Working Hydro pressure is at 400 psi. What is the correct relief valve setting? - ✔✔<600 psi What must first be installed on a false car before operation? - ✔✔Spring loaded safeties There is a slight arching at a brush at the commutator. What actions must be taken? - ✔✔None If rigging year is roped 3:1 and a beam clamp is used to lift 6000 pounds what is the load on the beam? - ✔✔6000 pounds How much resistance is usually measured a crossed a normally closed switch? - ✔✔0 ohms
A contractor wants to raise a car speed from 100 fpm to 125 fpm. It currently has a 12 inch sheave what sheave is required? - ✔✔15" sheave An MOV (metal oxide varistor) burns out. You replace it, but cannot read voltage or resistance. What do you do? - ✔✔Replace with a larger MOV 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 You have an old DC motor and you are adding a SCR drive. What do you do to the interpoles? - ✔✔Leave interpoles alone A Hydro runs up with no load, but does not run up with a full load. What is the problem? - ✔✔Relief valve setting too low Run by for a 1:1 car hits the counter weight buffer 4 inches below the top landing. Counterweight should be set at 18 inches. How much should the ropes be shortened? - ✔✔22" for 1: 44" for 2:
