PND Chapter 4

What is the primary function of the AC exciter in a brushless AC generator?

• To create a magnetic field

• To generate mechanical power

• To regulate voltage output

• To convert AC voltage to DC voltage

What device is used to maintain stable voltage in a brushless AC generator?

• Moulded Case Circuit Breaker (MCCB)

• Switchboard

• Circuit Breaker

• Automatic Voltage Regulator (AVR)

What is the purpose of cooling in generators?

• To reduce noise

• To increase efficiency

• To enhance voltage output

• To prevent overheating

Which of the following is NOT recorded on the engine record sheet?

• Coolant temperature

• Exhaust temperature

• Generator model number

• Lub Oil pressure and temperature

What is the role of the switchboard in a ship's electrical system?

• To distribute power to various equipment

• To generate electricity

• To cool the generator

• To monitor temperature

What does the Emergency Switchboard do?

• Supplies power during emergencies

• Regulates voltage output

• Generates AC voltage

• Controls the cooling system

Which of the following is a requirement for distribution systems on warships?

• Must only use air-cooling

• Must provide power through alternative configurations

• Must be limited to one generator

• Must not allow additional equipment

What is the main purpose of distribution panels (DP) in a ship?

• To direct electrical power to consumers

• To generate electricity

• To cool the generator

• To monitor voltage levels

What type of current is distributed from the 24V DP's?

• High voltage current

• DC current

• AC current

• Low frequency current

Rounds on Main Generators, When the normal operating temperature has been reached record the following on the engine record sheet:

1. 1. Lub Oil Pressure & temp

2. 2. Engine RPM

3. 3.__________________________

4. 4. __________________________

5. 5. Charge air temp & Pressure

• Coolant Temp, Air Pressure

• Exhaust Temp, Coolant Temp

• Ambient Temp, Sea water cooling Pressure

• Sea water cooling Pressure & Temp