Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a
A. Pitot tube
B. Manometer
C. Rotameter
D. None of these
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A fluid element has a velocity V = -y² . xi + 2yx² . j. The motion at (x, y) = (l/√2, 1) is
A. Rotational and incompressible
B. Rotational and compressible
C. Irrotational and compressible
D. Irrotational and incompressible
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For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
A. More
B. Less
C. Equal
D. Independent of porosity
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Bernoulli's equation describes the
A. Mechanical energy balance in potential flow
B. Kinetic energy balance in laminar flow
C. Mechanical energy balance in turbulent flow
D. Mechanical energy balance in boundary layer
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Air vessel provided in a reciprocating pump
A. Smoothens the flow by avoiding pulsations
B. Increases the volumetric efficiency of the pump
C. Saves the pump from the danger of cavitation
D. None of these
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With diminishing cross-sectional area in case of subsonic flow in a converging nozzle, the
A. Velocity increases
B. Pressure decreases
C. Both A and B
D. Neither A nor B
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The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is
A. Hyperbolic
B. Parabolic
C. Linear
D. None of these
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In which of the following cases, it is possible for flow to occur from low pressure to high pressure?
A. Flow of liquid upward in a vertical pipe
B. Flow through a converging section
C. Flow of air downward in a pipe
D. Impossible in a constant cross-section conduit
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The velocity profile for turbulent flow through a closed conduit is
A. Logarithmic
B. Parabolic
C. Hyperbolic
D. Linear
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For laminar flow of Newtonion fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship.
A. Logarithmic
B. Parabolic
C. Hyperbolic
D. Linear
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For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.
A. Logarithmic
B. Linear
C. Hyperbolic
D. Parabolic
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The head developed by a centrifugal pump is largely determined by the
A. Power of the pump
B. Nature of the liquid being pumped
C. Angle of the vanes and the speed of the tip of the impeller
D. Vapour pressure of the liquid
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Cavitation occurs in a centrifugal pump when the suction pressure is
A. Less than the vapour pressure of the liquid at that temperature
B. Greater than the vapour pressure of the liquid at that temperature
C. Equal to the vapour pressure
D. Equal to the developed head
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Draining of shallow pits or sump is done by a sump pump, which is a __________ pump.
A. Single stage vertical
B. Centrifugal
C. Plunger
D. Diffuser
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Specific speed for a centrifugal pump is
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Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an
A. Weir
B. Hot wire anemometer
C. Cup and vane aneometer
D. None of these
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Which of the following is an undesirable property of a manometric liquid?
A. Non-sticky & non-corrosive nature
B. High vapour pressure
C. Low viscosity & surface tension
D. Low co-efficient of thermal expansion
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Pick out the wrong statement.
A. Momentum transfer in laminar flow results from veclocity gradient
B. A fluid in equilibrium is not free from shear stress
C. The viscosity of a non-Newtonion fluid is a function of temperature only
D. Both B and C
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Which of the following is used for pumping crude oil from oil well?
A. Single stage centrifugal pump
B. Gear pump
C. Screw pump
D. Duplex/triplex reciprocating pump
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When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an
A. Ejector
B. Blower
C. Injector
D. Airlift
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