Fluid Mechanics for Chemical MCQs

724 MCQs  — Chemical Engineering MCQs  (Page 46 of 73)

Attempt Fluid Mechanics for Chemical Quiz
A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is__________________?
A. 20 m/sec
B. 10 m/sec
C. 5 √2 m/sec
D. 5 m/sec
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Pick out the Hagen-Poiseuille‟s equation ?
A. Δp/ρ = 4f (l/d) (v2/2gc)
B. Δp = 32 (μlv/gc. d2)
C. Δp/l = 150 [(1 – ε)/ε3]. (μ.v0
2/g2cd)
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The pressure head of a flow meter remains constant for_________________?
A. Venturimeter
B. Orificemeter
C. Rotameter
D. Pitot tube
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Which of the following quantities are computed by using the hydraulic radius for noncircular ducts ?
A. Velocity and relative roughness
B. Head loss and velocity
C. Reynold number, relative roughness and head loss
D. Reynolds number and friction factor
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A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be__________________?
A. 100
B. 200
C. 320
D. 160
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For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter) ?
A. 1/d
B. 1/d2
C. 1/d5
D. D2
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Check in a centrifugal pump is________________?
A. Provided in the discharge line
B. Generally a globe valve
C. Provided to prevent liquid from backing up through the pump when the pump is turned off or
AccIdently stops running
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Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have_____________?
A. Very low speeds
B. Smaller discharge
C. Higher capital &maintenance cost
D. High vibrations
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In an incompressible fluid, the density is____________________?
A. Greatly affected by moderate changes in pressure
B. Greatly affected only by moderate changes in temperature
C. Not affected with moderate change in temperature & pressure
D. Sensible to changes in both temperature & pressure
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Turbulent flow generally occurs for cases involving__________________?
A. Highly viscous fluid
B. Very narrow passages
C. Very slow motion
D. None of these
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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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