In Newtonian fluid, shear stress is
(a) Directly proportional to velocity gradient
(b) Inversely proportional to velocity gradient
(c) Equal to velocity gradient
(d) None
Which of the following is dimentionless ?
(a) Specific speed
(b) Specifc volume
(c) Specific gravity
(d) Specific weight
Surface tension of liquid
(a) Increase with area
(b) Increase with temperature
(c) Decrease with temperature
(d) Decrease with area
Cavitation is related to
(a) Vapour pressure
(b) Surface tension
(c) Viscosity
(d) Capillarity
The total pressure on a vertical immersed surface is
(a) wh
(b) wh A
(c) wA/h
(d) wh/A
Piezometer cannot be used to measure which of following ?
(a) Negative pressure
(b) Pressure of a gas
(c) Pressure of a liquid
(d) Both (a) and (b)
The flow in pipe is laminar if
(a) Reynold number is equal to 4000
(b) Reynold number is less than 2000
(c) Reynold number is greater than 2000
(d) Reynold number is greater than 4000
Continuity equation is based upon which law of conservation ?
(a) Mass
(b) Energy
(c) Momentum
(d) None of the above
Bernoulli’s equation is applicable to
(a) Compressible fluid
(b) Incompressible fluid
(c) Both (a) and (b)
(d) None of the above
Pitot tube is used to measure
(a) discharge
(b) average velocity
(c) velocity at a point
(d) pressure at a point
The loss of pressure head for the laminar flow through pipes varies
(a) directly as the velocity
(b) as the square of velocity
(c) as the inverse of the velocity
(d) None of the above
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