Engineering Mechanics > EXAM > Elevator mechanics review| 165 QUESTIONS WITH COMPLETE SOLUTIONS (All)

Elevator mechanics review| 165 QUESTIONS WITH COMPLETE SOLUTIONS

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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 floo... r 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 five Bad Transistor Top barricade can be replaced with? Correct Answer: 1/4" Cable There is voltage at the switch but none at point a what's wrong? Correct Answer: 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 Answer: Door limit switch malfunction Car running normally but the buzzer will not shut off why? Correct Answer: EHP 2/3 shorted Relay STR has voltage. TRU has voltage, RU has no voltage, why? Correct Answer: TRU 9/8 Second floor PI illuminates then quickly extinguishes why? Correct Answer: X1 4/6 On a machine, what is drilled out first? Correct Answer: Secondary sheave Dumb waiter takes off before loading why? Correct Answer: Non interference Car levels in 3 inches high in down direction why? Correct Answer: Counterweight In bi-parting doors what gap is allowed before gate switch is open? Correct Answer: 3/4" Pressure switch is wired in what direction Correct Answer: Down directional [Show More]

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