The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as
A. Evaporation
B. Cavitation
C. Sublimation
D. Stripping
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The maximum delivery pressure of compressors can be upto __________ atmospheres.
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A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be __________ metres.
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A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.
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Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of
A. Powder & grannular solids
B. Liquids
C. Low melting point semi-solids
D. All of the above
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Discharge from a 24 inch pipe of water at 10 ft/sec will be __________ ft3 /sec.
A. 7.65
B. 32.36
C. 48.22
D. 125.6
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Minimum fluidisation velocity for a specific system depends upon the
A. Particle size
B. Fluid viscosity
C. Density of both the particle & the fluid
D. All of the above
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The ratio of width to depth for the most economical rectangular section in open channel flow is
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Drag is defined as the force exerted by the
A. Fluid on the solid in a direction opposite to flow
B. Fluid on the solid in the direction of flow
C. Solid on the fluid
D. None of these
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Slugging in a fluidised bed can be avoided by using
A. Tall narrow vessel
B. Deep bed of solids
C. Shallow beds of solids and proper choice of particle size
D. Very large particles
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Fluid flow through a packed bed is represented by the __________ equation.
A. Fanning's
B. Ergun's
C. Hagen-Poiseuille's
D. None of these
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Volute of a centrifugal pump should be designed in a fashion, such that the
A. Kinetic head gets converted into static head
B. Moving stream gradually reduces velocity
C. Mean velocity remains constant
D. None of these
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In hindered settling, the particles are
A. Placed farther from the wall
B. Not affected by other particles and the wall
C. Near each other
D. None of these
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The main factor on which the behaviour of a mass of fluidised solid depends mainly is the
A. Fluid characteristics
B. Particle size
C. Both A and B
D. Neither A nor B
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For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is
A. More
B. Less
C. Equal
D. More or less, depending on the type of particle
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Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation?
A. Decrease in effect
B. Increase in thrust
C. Develops noise
D. Develops high pressure
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An equipotential line is __________ to the velocity vector at every point.
A. Normal
B. Abnormal
C. Tangential
D. None of these
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Steady non-uniform flow is exemplified by flow through a/an
A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate
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Pressure drop in packed bed for turbulent flow is given by the __________ equation.
A. Kozney-Karman
B. Blake-Plummer
C. Leva's
D. Hagen-Poiseulle's
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Pressure drop in a packed bed for laminar flow is given by the __________ equation.
A. Kozney-Karman
B. Blake-Plummer
C. Leva's
D. Fanning friction factor
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