Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation?
A. 1, 3, 4
B. 2, 4, 5
C. 1, 2, 5
D. 1, 4, 5
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For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is
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Sewage sludge is __________ type of non-Newtonion fluid.
A. Dilatant
B. Bingham plastic
C. Pseudo plastic
D. None of these
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__________ pumps are axial flow pumps.
A. Turbine
B. Propeller
C. Diffuser
D. None of these
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Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.
A. Increase
B. Decrease
C. Not change
D. Exponentially decrease
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The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.
A. Directly proportional to
B. Directly proportional to square of
C. Inversely proportional to
D. Inversely proportional to square of
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A pitched-blade turbine draws __________ a straight blade turbine.
A. Less power than
B. More power than
C. Same power as
D. Data insufficient to predict
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Viscosity of a liquid decreases __________ with rise in temperature.
A. Exponentially
B. Linearly
C. Logarithmically
D. None of these
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In isotropic turbulence, the __________ are equal to each other.
A. Temporal velocity components
B. Mean square of velocity fluctuations in the three co-ordinate directions
C. Root mean square of velocity fluctuations in the three co-ordinate directions
D. None of these
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Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.
A. Total pressure
B. Total energy
C. Velocity head
D. None of these
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The exit cone angle in case of a standard venturimeter is __________ the entrance cone angle.
A. Smaller than
B. Greater than
C. Equal to
D. Either A or B
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Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.
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The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter.
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Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.
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The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.
A. Size
B. Surface properties
C. Both A and B
D. Neither A nor B
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Power loss in an orificemeter is __________ that in a venturimeter.
A. Less than
B. Same as
C. More than
D. Data insufficient, cannot be predicted
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The terminal velocity of a particle moving through a fluid varies as dp n . The value of n is equal to __________ in Stoke's law regime.
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For the production of very high vacuum, a __________ pump is normally used.
A. Diffusion
B. Centrifugal
C. Jet ejector
D. Piston
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Drag co-efficient in hindered settling is __________ that in free settling.
A. Less than
B. Equal to
C. Not necessarily greater than
D. Always greater than
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Centre of pressure in an immersed body is __________ the centre of gravity.
A. Above
B. Below
C. At
D. Either above or below; depends on the liquid density
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