EGSA Prime Mover and Governors 2

Question 1

What is the primary function of a governor on a generator set prime mover?

Accepted Answer

To maintain engine speed by controlling fuel delivery

Answer

To regulate cooling water temperature

Answer

To regulate output voltage

Answer

To control the air-fuel mixture ratio only at startup

Question 2

In a diesel engine prime mover, what component directly actuates the fuel injection rack in response to governor signals?

Accepted Answer

The actuator (fuel control unit)

Answer

The throttle body

Answer

The voltage regulator

Answer

The speed sensor

Question 3

What is 'droop' in the context of a generator governor?

Accepted Answer

The intentional speed decrease as load increases, expressed as a percentage

Answer

The time delay before the governor responds to a load change

Answer

The voltage drop across the load terminals

Answer

The mechanical wear on governor linkages over time

Question 4

A diesel generator is running at 60 Hz at no load but drops to 59.4 Hz at full load. What is the governor droop percentage?

Accepted Answer

1%

Answer

2%

Answer

3%

Answer

5%

Question 5

Which type of governor uses flyweights rotating with the engine to sense speed changes?

Accepted Answer

Mechanical centrifugal governor

Answer

Electronic isochronous governor

Answer

Magnetic pickup governor

Answer

PID digital governor

Question 6

What happens to engine speed in an isochronous governor as load increases from no-load to full load?

Accepted Answer

Speed remains constant regardless of load

Answer

Speed decreases proportionally to load

Answer

Speed increases to compensate for the load

Answer

Speed fluctuates until manually adjusted

Question 7

A magnetic pickup (MPU) used with an electronic governor is mounted near which engine component?

Accepted Answer

The flywheel ring gear

Answer

The camshaft belt

Answer

The alternator rotor

Answer

The oil pressure sender