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Which phenomenon will occur when the valve at the discharge end of a pipe connected to a reservoir is suddenly closed?

Which phenomenon will occur when the valve at the discharge end of a pipe connected to a reservoir is suddenly closed? Correct Answer Hammering

Explanation:

  • When a liquid flowing through a long pipe is suddenly brought to rest by closing the valve at the end of a pipe, then a pressure wave of high intensity is produced behind the valve.
  • This pressure wave of high intensity has the effect of hammering action on the walls of the pipe. 
  • This phenomenon is known as water hammer or hammer blow.
  • The magnitude of water hammer depends upon
    • The length of the pipeline,
    • The elastic properties of the pipe material,
    • The elastic properties of the liquid flowing through the pipe, and
    • The speed at which the valve is closed

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