In the laminar boundary layer flow over a flat plate, the ratio x δ δ
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Hydraulic radius is the ratio of
A. Wetted perimeter to flow area
B. Flow area to wetted perimeter
C. Flow area to square of wetted perimeter
D. Square root of flow area to wetted perimeter
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Prandtl number is a measure of the
A. Heat conduction to viscosity of a fluid
B. C v C p
C. Elastic force to pressure force in the fluid flow
D. Inertial force to elastic force in the fluid flow
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Mass velocity is independent of temperature & pressure, when the flow is
A. Unsteady through unchanged cross-section
B. Steady through changing cross-section
C. Steady and the cross-section is unchanged
D. Unsteady and the cross-section is changed
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What causes convective acceleration in fluid flow?
A. Steep slope in flow
B. Unsteady nature of flow
C. Non-uniformity of flow
D. Turbulence in flow
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Normal depth in open channel flow is the depth of flow in the channel
A. Corresponding to uniform flow
B. Measured normal to the channel bed
C. Corresponding to steady flow
D. None of these
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Which of the following is not concerned with the fluid-particle interaction?
A. Drag co-efficient
B. Froude number
C. Galileo number
D. Weber number
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Which of the following is dimensionless?
A. Angular velocity
B. Fanning friction factor
C. Specific volume
D. None of these
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The pressure co-efficient is the ratio of pressure forces to __________ forces.
A. Viscous
B. Inertial
C. Gravity
D. Surface tension
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Pressure co-efficient is the ratio of pressure forces to __________ forces.
A. Gravity
B. Inertial
C. Viscous
D. None of these
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The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by
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If 'x' is the depth of flow in an open channel of large width, then the hydraulic radius is equal to
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In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes
A. Less than atmospheric pressure
B. More than liquid vapor pressure
C. Less than liquid vapor pressure
D. More than atmospheric pressure
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A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.
A. Sump
B. Volute
C. Vacuum
D. Submerged
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Check valve is used for __________ flow.
A. Very precise control of
B. Unidirectional
C. Multidirectional
D. None of these
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A rotameter works on the principle of __________ pressure drop.
A. Constant
B. Variable
C. Both A & B
D. Neither A nor B
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The continuity equation of fluid mechanics utilises the principle of conservation of
A. Momentum
B. Mass
C. Energy
D. Both B & C
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Which of the fluid forces are not considered in the Reynold's equation of flow?
A. Viscous forces
B. Turbulent forces
C. Pressure forces
D. Compressibility forces
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A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is
A. 10 KPa
B. 20 KPa
C. 30 KPa
D. 40 KPa
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Piezometric head is the sum of the __________ heads.
A. Elevation & kinetic energy
B. Elevation & pressure
C. Kinetic energy & pressure
D. None of these
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