PND Chapter 3-5

What term describes one full oscillation of an AC waveform?

• Period

• Cycle

• Frequency

• Amplitude

The unit of frequency is measured in:

• Volts

• Amperes

• Hertz

• Watts

What does a three-phase generator produce?

• Three independent voltages out of phase by 120°

• Two voltages out of phase by 90°

• One voltage

• Four independent voltages

What type of connection is used where three phases are connected end-to-end?

• Star

• Delta

• Series

• Parallel

Which generator uses a rotor with salient poles?

• High-speed generators

• Low-speed diesel generators

• Gas turbines

• Steam turbines

What equipment ensures that generators share load equally when paralleled?

• Rectifier

• AVR

• Load Sharing Controller

• Exciter

What is used to cool shipboard generators?

• Seawater directly

• Fresh air only

• Air cooled via heat exchanger

• Manual fanning

What does 'Breaker Discrimination' ensure?

• Entire system shuts down in fault

• Only the faulty circuit trips

• Power is distributed evenly

• Generator speed remains stable

What device protects electrical circuits by isolating faults?

• Switch

• Circuit Breaker

• Contactor

• Transformer

What happens if two unsynchronized generators are paralleled?

• Load sharing improves

• Severe damage occurs

• Voltage stabilizes

• Frequency improves