WATER HAMMER MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS
WATER HAMMER MULTIPLE
CHOICE QUESTIONS
(MCQ) WITH ANSWERS
Fig. Water Hammer (Sudden closure of valve)
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The other name of water hammer is
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(a) Shock wave
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(b) Fluid blow
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(c) Water blow
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(d) None
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ANS: ( c)
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Water hammer is due to
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(a) Sudden change in internal energy
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(b) Sudden change in potential energy
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(c) Sudden change in molecular energy
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(d) None
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ANS: (d)
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Water hammer is due to
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(a) Sudden change in pressure
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(b) Sudden change in temperature
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(c) Sudden change in momentum
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(d) None
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ANS: (c)
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Water hammer is found in
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(a) Mainly in gases
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(b) Mainly in liquids
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(c) Nether in liquids nor in gases
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(d) None
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ANS: (b)
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Water hammer is a
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(a) Very high velocity wave
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(b) Very high temperature wave
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(c) Very high pressure wave
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(d) None
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ANS: ©
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Water hammer is due to
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(a) Slow change in momentum
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(b) Slow as well as fast change in momentum’
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(c) Fast change in momentum
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(d) None
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ANS: ( c)
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Water hammer produces a
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(a) Pleasant sound
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(b) Non pleasant sound
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(c) Neither pleasant or Non pleasant sound
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(d) None
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ANS: (b)
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During the water hammer phenomenon, water flows in
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(a) Forward direction
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(b) Backward direction
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(c) Forward as well as backward direction
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(d) None
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ANS: ©
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Time interval in case of a water hammer is
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(a) Large
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(b) Small
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(c) Both small and large
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(d) None
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ANS: (b)
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Water hammer depends on the
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(a) Diameter of the pipe
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(b) Length of the pipe
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(c) Both diameter and length of the pipe
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(d) None
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ANS:(b)
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Celerity ( C) the velocity of the pressure wave can be found from length of pipe
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(a) 2L X time
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(b) 2L/ time
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(c) L x time
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(d)
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None
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ANS: (d)
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Water hammer produces a knocking sound
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(a) When the velocity of pressure wave > velocity of sound
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(b) When the velocity of pressure wave < velocity of sound
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(c) When the velocity of pressure wave = velocity of sound
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(d) None
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ANS: ( c)
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Water hammer depends on the elastic modus of
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(a) Water
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(b) Pipe
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(c) Both of water and pipe
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(d) None
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ANS: ( c)
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Celerity ( C) the velocity of pressure wave is given by
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(a) ρ (pipe)
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(b) ρ(Water)
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(c) ρ(pipe + water)
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(d) None
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ANS: (b)
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Water hammer is a
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(a) Water issue
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(b) Pipe issue
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(c) Safety issue
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(d) None
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ANS: (c )
16. Water hammer will exist in a
(a) Capillary tube
(b) Channel flow
(c) River flow
(d) None
ANS: (d)
17. Water hammer will exist in a
(a) compressor
(b) Turbine
(c) Pump
(d) None
ANS: (d)
18. Water hammer will exist in a
(a) Penstock
(b) Venturimeter
(c) Orifice meter
(d) None
ANS: (a)
19. Formation of water hammer depends upon the
(a) Velocity of flow
(b) Speed of closing the valve
(c) Both (a) & (b)
(d) None
ANS: (c)
20. Water hammer will take place on the
(a) Fast opening of the valve
(b) Slow opening of the valve
(c) Both (a) & (b)
(d) None
ANS: (d)
22. Water hammer will take place on the
(a) Fast closing of the valve
(b) Slow closing of the valve
(c) Both (a) & (b)
(d) None
ANS: (a)
23. Most important property for a water hammer is
(a) Viscosity
(b) Density
(c) Both (a) & (b)
(d) None
ANS: (b)
24. Time taken to form water hammer is with length of pipe ‘L’ and velocity of flow as ‘c’
(a) L /c
(b) 2L/c
(c) 3L/c
(d) None
ANS: (b)
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