What does a mechanical governor do?
A. Recognizes and reacts to change in load demand
B. Supplies unlimited high-pressure fuel to the injectors
C. Increases fuel injection duration on cold mornings
D. Advances fuel injection timing as engine speed increases
Answer (2)
A mechanical governor regulates engine speed by adjusting the fuel supply in response to changes in load demand. It ensures that the engine runs smoothly and efficiently. The correct choice is A. Recognizes and reacts to change in load demand.
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A mechanical governor is an important component in engines, particularly in older engines and machinery, used to regulate engine speed. Here's a detailed explanation of its purpose and function:
Primary Function : The main function of a mechanical governor is to manage and stabilize the engine speed by regulating fuel supply based on demand. It ensures that the engine runs at the desired speed despite changes in load.
How It Works : Mechanical governors typically operate using centrifugal force. They consist of weights, springs, and levers. As the engine speed increases, the centrifugal force causes the weights to move outward. This movement is used to adjust the fuel supply to maintain the desired engine speed.
Option A is Correct : "Recognizes and reacts to change in load demand" is the correct choice. The governor detects changes in engine speed due to load changes and adjusts the fuel delivery accordingly to maintain consistent speed.
Why It Matters : Consistent engine speed is crucial for applications where variable loads are common, such as in generators, pumps, and other industrial machinery. Without a governor, the engine would speed up as the load decreases and slow down as the load increases, leading to inefficiency and potential damage.
Overall, mechanical governors play a key role in ensuring the stable operation of engines under varying load conditions.
