Hall voltage - Study guides, Class notes & Summaries

Elevator mechanics review Car running up keep stopping why? - Answer Contact is not deenergizing in push button Third-floor bulbs burn out why? - 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? - Answer 2Fl 4/6 Why won't motor start? - Answer MOL1 95/96 Car doors closed and won't run what do you check? - Answer Check for voltage at four and five Bad Tra...

Incident Safety Officer Exam Questions With 100% Correct Answers 2024/2025 Individual turbine blades can be __ to __ feet long creating a rotational diameter and danger zone of more than ___ feet - answer60 to 130/300 a ___ is defined in writing and can take on many forms:SOPS, SOGS, departmental directives, temporary memorandums - answerformal process Procedures - answerStrict directives that must be followed with little or no flexibility An ___ is a process or operation that is part of ...

1. What type of elevator control passes up hall calls in the down direction and down hall calls in the up direction? (705) Answer: Selective collective control 2. Which of the following statements applies to two-speed AC drives? (705) Answer: - VVVF modifications can greatly improve floor accuracy 3. Which type of diagram provides a picture of the appearance and location of elevator parts? (705) Answer: Field wiring diagram 4. Which of the following symbols represents a field winding? (70...

The motor generators drive motor (DV) will run on delta through what contacts? : KR 1-2, KR 3-4, and KR 5-6 What three contacts will energize the reverse phase relay and 2RF rectifier? : ER 1-2, ER 3-4, and ER 5-6 In the duplex system, when one car is traveling down to the lobby and the second car is parked at the lobby with the generator shit down, which car would answer a 5th floor up hall call? : Home car Which of the following relay contacts must be closed to apply DC braking to the ...

What term is used when a water utility divides its total operating expenses into the total revenue? a.) Debt ratio b.) Operating ratio c.) Credit ratio d.) Coverage ratio b.) Operating ratio Under the requirements of the Safe Drinking Water Act, it is the duty of the water purveyor to deliver potable water of proper quality only as far as the: a.) Entry point of the distribution system b.) Customer's curb box and service connection c.) Consumer's tap inside the home d.) Furthest wate...

Which of the following would be used to troubleshoot a controller problem? ANSWER Straight-line wiring diagram In the single automatic push button system (SAPB) how many calls can be registered at one time? ANSWER One call at a time What type of elevator control passes up hall calls in the down direction and down hall calls in the up direction? ANSWER Selective collective control What does the following symbol represent? ANSWER Poly/Three-phase rectifier What do the following symbols represent? ...

Which of the following would be used to troubleshoot a controller problem? - ANS Straight-line wiring diagram In the single automatic push button system (SAPB) how many calls can be registered at one time? - ANS One call at a time What type of elevator control passes up hall calls in the down direction and down hall calls in the up direction? - ANS Selective collective control What does the following symbol represent? - ANS Poly/Three-phase rectifier ...

A horn is inoperative. Tech A says in order to repair the horn switch; the Supplemental Restraint System should be disabled. Tech B says to check for voltage at the relay. Who is right? - Both techs The ball joints on a MacPherson strut suspension are being replaced. Technician A says that the coil spring compressor should be installed before separating the control arm and spindle. Technician B says that the wheel alignment should be checked after the ball joints have been replaced. Who is r...

Elevator Mechanics Review Questions with 100% Correct Answers 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 Transist...

Technician A says that when pressure testing a radiator cap, a special adapter is needed. Technician B says the best way to check thermostat operation is while it is in the engine. Who is right? Tech A A technician is checking resistance in an engine's spark plug wires using an ohmmeter. A general rule is to replace a wire if resistance is over: 30,000 ohms Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read Mo...