Chemical Engineering MCQs

6108 MCQs  (Page 417 of 611)

Attempt Chemical Engineering Quiz
A centrifugal pump loses prime after starting. The reason of this trouble may be_____________________?
A. Incomplete priming
B. Too high a suction lift
C. Low available npsh and air leaks in the suction pipe
D. All a., b., and c.
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The kinetic energy correction factor for velocity distribution of laminar flow is_________________?
A. 0.5
B. 1.66
C. 1
D. 2
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The co-efficient of drag and lift for an incompressible fluid depends on the_________________?
A. Reynolds number
B. Froude number
C. Mach number
D. All a., b. and c.
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The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its __________________?
A. Absolute viscosity
B. Ratio of absolute viscosity to density
C. Density
D. Reynolds number
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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 & granular solids
B. Liquids
C. Low melting point semi-solids
D. All a, b & c
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Volume of liquid displaced by a floating body is equivalent to its_________________?
A. Own weight
B. Submerged weight
C. Own volume
D. Submerged volume
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The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and___________________?
A. Moving
B. Static
C. Cold
D. Hot
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What causes cavitation in centrifugal pump ?
A. High suction pressure
B. Low barometric pressure
C. Low suction pressure
D. High suction velocity
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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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Pitot tube measures the ______________ of a fluid?
A. Pressure
B. Average velocity
C. Average flow rate
D. Point velocity
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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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