Chemical Engineering MCQs

6108 MCQs  (Page 375 of 611)

Attempt Chemical Engineering Quiz
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _______________ the mean velocity of flow?
A. Directly proportional to
B. Directly proportional to square of
C. Inversely proportional to
D. Inversely proportional to square of
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Existence of boundary layer in fluid flow is because of the_________________?
A. Surface tension
B. Fluid density
C. Fluid viscosity
D. Gravity forces
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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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The head loss due to sudden contraction is proportional to___________________?
A. Velocity
B. Velocity head
C. Turbulence
D. None of these
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Critical velocity in a pipe flow_________________?
A. Increases as fluid viscosity increases
B. Increases as pipe diameter increases
C. Independent of fluid density
D. None of these
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Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f1 and that for smooth pipe is f2. Pick out the correct statement ?
A. F1 = f2
B. F1 < f2
C. F1 > f2
D. Data not sufficient to relate f1 & f2
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Choose the set of pressure intensities that are equivalent ?
A. 4.33 psi, 10 ft. of water, 8.83 inches of hg
B. 4.33 psi, 10 ft. of water, 20.7 inches of hg
C. 10 psi, 19.7 ft. of water, 23.3 inches of hg
D. 10 psi, 19.7 ft. of water, 5.3 inches of hg
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Velocity head on sudden enlargement in a horizontal pipe is converted into ______________ head?
A. Elevation
B. Pressure
C. Both a. & b.
D. Neither a. nor b.
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Transition length for turbulent flow in smooth pipe is equal to _____________ times the pipe diameter?
A. 0.5
B. 5
C. 50
D. 500
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Stoke’s law is valid, when the particle Reynolds number is ______________________?
A. < 1
B. > 1
C. < 5
D. None of these
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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