Q.

Under which of the following conditions the closure of valve is considered rapid? (where L = length of pipe, C = velocity of pressure wave produced due to water hammer.)

A. The duration of valve closure is greater than 2L/C
B. The duration of valve closure is less than L/C
C. The duration of valve closure is less than 2L/C
D. None of the above.
Answer» C. The duration of valve closure is less than 2L/C
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