Answer the following statement(s) true (T) or false (F)
1. The direction of rotation of three-phase motors can be reversed by interchanging any two-motor leads to the line.
2. Push-button interlocking is an electrical method of preventing both starter coils from being de-energized
simultaneously.
3. NEMA specifications call for a starter to be derated.
4. Electrical interlocks are usually mounted on the side of a motor starter.
5. To reverse the direction of rotation of single-phase motors, both the starting and running winding motor leads are
interchanged.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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A(n) ____________________ uses vanes and a cam to generate fluid pressure.
Fill in the blank(s) with the appropriate word(s).
The type of schematic diagram used to describe motor-control circuitry is often referred to as a ladder diagram or ____ ladder logic.
a. internal b. motor c. control d. relay
During a planned maintenance call, technicians should check the power wiring to make sure:
A) Any resilient mounted motors are isolated from the ground. B) The unit is grounded. C) The unit is not grounded. D) A heavy wire runs from both L1 and L2 to the equipment ground.
Technician A says that a vehicle must have new tires in order to perform a proper alignment. Technician B says that the tires should be the same size with the same treadwear in order to perform a proper alignment. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B