Fluid Mechanics for Chemical MCQs

724 MCQs — Chemical Engineering MCQs (Page 62 of 73)

Attempt Fluid Mechanics for Chemical Quiz

Reciprocating pumps compared to centrifugal pumps__________________?

A. Deliver liquid at uniform pressure
B. Can handle slurries more efficiently
C. Are not subject to air binding
D. Can be operated with delivery valve closed

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A fluid (μ/ρ) = 0.01 cm2/sec is moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is _______________ cm/sec?

A. 7
B. 700
C. 7000
D. 630

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For flow through a venturi at a particular discharge, the correct relationships among velocities at point X, Y and Z would be __________________?

A. V1 < v2 < v3
B. V2 > v1 and v2 > v3
C. V1 > v2 > v3
D. None of these

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The most important factor, which determines the maximum height to which water can be lifted by a pump at standard temperature is the_____________________?

A. Barometric pressure
B. Speed of the impeller
C. Diameter of the impeller
D. Both b. and c.

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Cocks are used to control ___________________?

A. Water
B. Any liquid
C. Solids
D. None of these

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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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Experimental study of laminar fluid flow through a circular tube was conducted by____________________?

A. Reynolds
B. Hagen and posieuille
C. Pascal
D. Blake-plummer

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Which of the following factors does not contribute to the pressure drop in a pipeline ?

A. Velocity of fluid
B. Size of pipe
C. Length of pipe and number of bends
D. None of these

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What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air ?

A. 4πg/3
B. 0.01 πgh/4
C. 0.01 πgh/8
D. 0.04 πgh/3

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Cd for the orifice plate varies from ___________________?

A. 0.58 to 0.8
B. 0.93 to 0.98
C. 0.2 to 0.3
D. 0.02 to 0.03

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