Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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What is a flyball governor primarily used for in an engine?

To increase power
To maintain constant engine speed
To reduce fuel consumption
To cool the engine

The correct answer is: To maintain constant engine speed

A flyball governor is primarily used to maintain a constant engine speed by automatically adjusting the fuel supply based on the engine's load and speed. It relies on centrifugal force generated by rotating weights (the flyballs) that respond to changes in speed. As the engine speed increases, the flyballs move outward, which in turn adjusts the throttle or fuel supply to decrease power and stabilize the speed. Conversely, if the engine speed decreases, the flyballs retract, allowing more fuel to maintain performance. This mechanism is crucial for ensuring that engines operate efficiently across various load conditions, thus providing consistent performance for machinery and equipment.