Which of the following statements is correct regarding governor?  

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SSC JE Mechanical 9 Oct 2023 Shift 2 Official Paper-I
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  1. It controls acceleration of the prime mover. 
  2. It controls the temperature of the prime mover.  
  3. It controls the mean speed of the prime mover.  
  4. It is not a compulsory device of the prime mover. 

Answer (Detailed Solution Below)

Option 3 : It controls the mean speed of the prime mover.  
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Detailed Solution

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Explanation:

Governor:

The function of a governor is to regulate the mean speed of an engine, when there are variations in the load e.g. when the load on an engine increases, its speed decreases, therefore it becomes necessary to increase the supply of working fluid. On the other hand, when the load on the engine decreases, its speed increases, and the thus less working fluid is required.
The governor automatically controls the supply of working fluid to the engine with the varying load conditions and keeps the mean speed within certain limits.

Additional Information

Types of governor:

Assignment 8 34 Theory of Machine part test Diag Modified images Q25

Governors are classified as:

  • Centrifugal Governor
  • Inertia Governor


Centrifugal Governors are classified as:

  • Dead Weight Governors:
    • Porter governor
    • Proell governor
  • Spring controlled governors:
    • Hartnell governor
    • Hartung governor
    • Pickering governor

Confusion Points

Students often confuse in working of governor and flywheel.

Governor: Maintains the constant mean speed of the shaft.

Flywheel: It doesn't maintain a constant speed. It simply reduces the fluctuation of speed.

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