Elevator mechanics review Questions with Complete Solutions Car running up keep stopping why? - Correct Answers ✅Contact is not deenergizing in push button Third-floor bulbs burn out why? - Correct Answers ✅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 Answers ✅2Fl 4/6 Why won't motor start? - Correct Answers ✅MOL1 95/96 Car doors closed and won't run what do you check? - Correct Answers ✅Check for voltage at four and five Bad Transistor Top barricade can be replaced with? - Correct Answers ✅1/4" Cable There is voltage at the switch but none at point a what's wrong? - Correct Answers ✅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? - Correct Answers ✅Door limit switch malfunction 1 / 3
Elevator mechanics review Questions with Complete Solutions Car running normally but the buzzer will not shut off why? - Correct Answers ✅EHP 2/3 shorted Relay STR has voltage. TRU has voltage, RU has no voltage, why? - Correct Answers ✅TRU 9/8 Second floor PI illuminates then quickly extinguishes why? - Correct Answers ✅X1 4/6 On a machine, what is drilled out first? - Correct Answers ✅Secondary sheave Dumb waiter takes off before loading why? - Correct Answers ✅Non interference Car levels in 3 inches high in down direction why? - Correct Answers ✅Counterweight In bi-parting doors what gap is allowed before gate switch is open? - Correct Answers ✅3/4" Pressure switch is wired in what direction - Correct Answers ✅Down directional 2 / 3
Elevator mechanics review Questions with Complete Solutions What is the tripping speed of counterweight governor? - Correct Answers ✅No more than 10% higher There is excessive sparking on generator why? - Correct Answers ✅High Micha How does interpoles affect the Armature? - Correct Answers ✅Reaction What is the maximum door closing force? - Correct Answers ✅30 lbs and 7 lbs kinetic What do you do before replacing a relay on a controller? - Correct Answers ✅LOTO, Test, and Verify When are spring buffers used? - Correct Answers ✅Less than 200fpm What are SCR's good for? - Correct Answers ✅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? - Correct Answers ✅75 ohm 200 watt adjustable resistor
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