Mechanical Engineering > EXAM > Elevator Mechanic Exam Review Questions and Answers with Complete Solutions (All)
Elevator Mechanic Exam Review Questions and Answers with Complete Solutions
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A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? ✔✔Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave A MOV (... Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? ✔✔Replace it 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 are adding an SCR drive, what do you do to the interpoles? ✔✔Leave the interpoles alone. When adding a SCR drive to the generator, the series loop is removed, as are the 3 resistors. Everything else remains the same A hydro runs up with no load, but will not run with a full load. What is the issue? ✔✔The relief valve is set too low [Show More]
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