Answer the following statement(s) true (T) or false (F)
1. In some generator systems, a large diode system is installed to prevent field charge damage.
2. If there is a complete failure of the AC power, the oil switch cannot be operated from the DC source.
3. The electrical current flowing in the alternators through conductors produces heat in the coils because of I2 R losses.
4. The voltage to the potential coils of instruments mounted on the switchboard should not exceed 120 to 125 volts.
5. It is safe to open the secondary circuit of a current transformer when there is a current flow in the primary circuit.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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When is a forward-curved centrifugal blower motor most likely to draw high amps?
A) When there is no restriction to the airflow in or out of the blower B) When the airflow leaving the blower is restricted C) When the airflow to the blower is restricted D) When the motor RPM is set lower than the manufacturer's specifications
The three-phase motor does not require any current relays, potential relays, or a centrifugal switch because ________
A) it is a low-torque motor, and these relays would cause its torque to become too large B) these switches are mainly used to control for overcurrent conditions C) it has three equal windings instead of a start winding
When a driver feels fatigued, the best, safest, and only fatigue-management solution is sleep.
Answer the following statement true (T) or false (F)