After replacing a blown fuse in a unit disconnect, the technician should:
A) Check the resistance of every system component.
B) Check the frequency and phase angle of the voltage at the unit with the unit operating.
C) Swap some wires around to see if it helps.
D) Check the system amp draw and compare it to the data plate rating.
D
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Answer the following statement(s) true (T) or false (F)
1. There is one basic function of synchronous motor control in starting.
2. The principal difference between synchronous motor control and induction motor control is in the control of the field.
3. In the accompanying figure, when the stator is energized, the rotor circuit must be open at all times.
4. In the accompanying figure, the normally open contacts M in the F coil circuit prevent the DC field from being
energized before the motor is started.
5. In the accompanying figure, the ammeter and rheostat control the excitation current.
For safety training to effectively motivate and have a long-term impact on trainees, it is necessary to _____.
a. make the information personally relevant to them b. apply subtle pressure related to job security c. give them daily reminders about their responsibilities d. have them recite site safety rules
A series circuit is usually used for devices that are connected in the circuit for safety or control.
Answer the following statement true (T) or false (F)
The outside diameter of an electrical conduit is 6.3 centimeters. The thickness of the conduit is 0.4 centimeter. Find the inside diameter of the conduit. Carry the answer to one decimal place.
Fill in the blank(s) with the appropriate word(s).