__________ forces do not act in case of fluid flow.
A. Elastic
B. Tensile
C. Vibratory
D. Centrifugal
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Which of the following is not an advantage of fluidisation from transfer operation point of view?
A. Intimate contact of the fluid with all parts of the solid particles
B. Lower fluid pumping power requirement
C. Minimisation of temperature variation
D. Prevention of particle seggregation
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Dimension of absolute viscosity is
A. ML-1 T-1
B. MLT-1
C. ML-1 T
D. MLT
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One dimensional fluid flow implies the
A. Flow in straight lines only
B. Uniform flow
C. Steady uniform flow
D. Flow in which transverse components are zero
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Molten soap mass is transported by a __________ pump.
A. Diaphragm
B. Reciprocating
C. Gear
D. Centrifugal
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Equivalent length of a pipe fitting is
A. Dependent on Reynolds number
B. Independent of Reynolds number
C. Dependent on the length of the pipe
D. None of these
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Pick out the correct statement pertaining to venturimeter.
A. A venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward
B. The co-efficient of contraction of a venturimeter is always unity
C. For a fixed pressure drop, the discharge of a gas through a venturimeter is greater, when compressibility is taken into account, than when it is neglected
D. None of these
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With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost
A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially
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Self-priming centrifugal pump can be used for
A. Booster service
B. Pumping liquid fertilisers (e.g. liquid NH3 )
C. Pumping industrial wastes
D. All of the above
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For laminar flow of Newtonion fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity)
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Which of the following equations is valid for laminar flow of a fluid through packed bed?
A. Fanning equation
B. Kozney - Karman equation
C. Hagen - Poiseuille equation
D. Blake - Plummer equation
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Co-efficient of discharge (Cd ) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv ; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about
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Fanning friction factor for laminar flow of fluid in a circular pipe is
A. Not a function of the roughness of pipe wall
B. Inversely proportional to Reynolds number
C. Both A and B
D. Neither A nor B
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The distribution of shear stress in a stream of fluid in a circular tube is
A. Linear with radius for turbulent flow only
B. Linear with radius for laminar flow only
C. Linear with radius for both laminar & turbulent flow
D. Parabolic with radius for both laminar & turbulent flow
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Purpose of hydraulic accumulator is to
A. Ensure intermittant supply of hydraulic pressure
B. Increase the pressure and store/ accumulate it
C. Accumulate pressure to increase force
D. Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc
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Which of the following properties of a fluid is responsible for offering resistance to shear?
A. Surface tension
B. Viscosity
C. Specific gravity
D. All of the above
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Which of the following is a Newtonian fluid?
A. Rubber latex
B. Sewage sludge
C. Quicksand
D. Non-colloidal solution
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An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic?
A. Sewage sludge
B. Rubber latex
C. Blood
D. Sugar solution
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Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.
A. Smaller than
B. Larger than
C. Same as
D. Twice
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Centrifugal pumps as compared to reciprocating pumps
A. Run at a lower speed for the same discharge
B. Do not need priming
C. Deliver fluid with pulsating/fluctuating discharge
D. Can be run with discharge line valve closed for a short interval
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