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 4/6 Why won't motor start? - MOL1 95/96 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 9/8 Second floor PI illuminates then quickly extinguishes why? - X1 4/6On 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 resistorPump overload keeps tripping. How do you measure amperage? - Clamp on meter separately each wire Customer complains about a third floor PI bulb burned out, why? - Shorted resistor There are three elevators, 12 floors, customer does not want PI's on second, seventh, and eighth floor. How many total PI 's? - 27 PI's 10k ohm resistor with 500mF. How long will it take to charge capacitor? - 5 sec What do you do before running a Hydro after car is built? - Check piston for debris and make sure head is tight How to tell which side is right or left hand doors? - Inside looking out If you get a complaint that all floors make noise, what should you check? - Car doors What is the issue if you add power to a generator but the motor doesn't gain any more speed? - Generator is saturated If a handrail switch is tripped and you reset it but the escalator immediately turns back on, what's the problem? - Start switch is stuck in the on position How many Crosbys do you use on half inch rope - 3 What do U grooves need? - Double wrap What do you hold machine beams down with? - Tie downs When working on a PC board, what must you do? - Grounded wristband