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NEIEP 100 elevator final exam (GRADED A) (Latest Version) Questions and Answers.p

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If a hydraulic elevator will not run down, what is the first thing you should try? : See if it will run down by opening the manual lowering valve When calculating hydraulic system pressure, the force is expressed in pounds and the area of the plunger is measured in square inches. How is the pressure expressed? : In pounds per square inch What is the name of the scientific principle that allows a hydraulic elevator to operate? : Pascal's Law How often must a static load test be performed...

Zener current will decrease : Refer to figure 1. If the load resistance R2 is reduced by half what happens what happens to zener diode? 4v : Refer to figure 1. The zener diode is designed to breakdown at 6VDC what is the voltage drop across R1 with a constant DC supply of 10VDC 30 rpm : An elevators motor rotates at 1200 rpm at contract speed and is geard at a ratio of 40:1. If the motor turns 40 rpm the sheave turns 1 rpm. What is the actual speed of the drive sheave in rpms? The ou...

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1. A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? ANSWER-100 fpm/125 fpm= 12"/ X =15 2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? ANSWER-Replace it with a larger MOV – 630 3. On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? ANSWER-Suicide Circuit – 425 4. You have an ...

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