Fluid Mechanics for Chemical MCQs

724 MCQs  — Chemical Engineering MCQs  (Page 64 of 73)

Attempt Fluid Mechanics for Chemical Quiz
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 nosie
D. Develops high pressure
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Cd is always ______________ Cc?
A. Greater than
B. Less than
C. Equal to
D. Either more or less than
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A gas (density = 1.5 kg/m3, viscosity = 2 × 10‒5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5 kg/m3and viscosity of 3 × 10‒5kg/m.s flowing at 3 m/s will be________________?
A. 8400 pa/m
B. 12600 pa/m
C. 18900 pa/m
D. 16800 pa/m
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Characteristic curves for a centrifugal pump plotted against its capacity is shown in the diagram. x, y and z denote respectively_______________?
A. Efficiency, head and b.h.p.
B. Head, efficiency and b.h.p.
C. B.h.p., efficiency and head
D. Efficiency, b.h.p. and head
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If in a flow field, between any two points, then the flow must be___________________?
A. Steady, incompressible, irrotational
B. Steady, compressible, irrotational
C. Steady, compressible and along a streamline
D. Unsteady, incompressible, irrotational
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Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump ?
A. Increasing the impeller speed and the volute area
B. Increasing the number of vanes in the impeller
C. Mounting of two or more impellers in series on a single shaft
D. Either of a., b. or c.
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Working of a _______________ pump characterises mixed flow?
A. Turbine
B. Piston
C. Diaphragm
D. None of these
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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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In case of Venturimeter, friction losses are about _____________ percent of maximum velocity head?
A. 2
B. 8
C. 12
D. 20
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The maximum head that can be developed by a single impeller is _____________ ft?
A. 25
B. 100
C. 250-300
D. 1000
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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