Chemical Engineering MCQs

Page No. 191

Volume of liquid displaced by a floating body is equivalent to its_________________?


aOwn weight

✓


bSubmerged weight

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cOwn volume

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dSubmerged volume

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View Answer Own weight

Which of the following has the smallest least effect on the solubility of a solute into the solvent ?


aNature of the solute

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bNature of the solvent

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cTemperature

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dPressure

✓


View Answer Pressure

Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of_________________?


aPowder & granular solids

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bLiquids

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cLow melting point semi-solids

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dAll A, B & C

✓


View Answer All A, B & C

Normality of a solution does not change with the increase in the __________________?


aPressure

✓


bTemperature

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cSolute concentration

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dDilution of the solution

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View Answer Pressure

The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its __________________?


aAbsolute viscosity

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bRatio of absolute viscosity to density

✓


cDensity

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dReynolds number

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The co-efficient of drag and lift for an incompressible fluid depends on the_________________?


aReynolds number

✓


bFroude number

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cMach number

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dAll A., B. and C.

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View Answer Reynolds number

The depression in freezing point of a solution is________________?


a Inversely proportional to the mass of solvent

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bDirectly proportional to the mole of solute

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c Both A. and B.

✓


dNeither A. nor B.

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View Answer Both A. and B.

The kinetic energy correction factor for velocity distribution of laminar flow is_________________?


a0.5

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b1.66

✓


c1

✖


d2

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View Answer 1.66

A centrifugal pump loses prime after starting. The reason of this trouble may be_____________________?


aIncomplete priming

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bToo high a suction lift

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cLow available NPSH and air leaks in the suction pipe

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dAll A., B., and C.

✓


View Answer All A., B., and C.

At higher temperatures, molal heat capacities for most of the gases (at constant pressure) _______________ with increase in temperature?


aVaries linearly

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bIncreases

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c Decreases

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dDoes not vary

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View Answer Increases

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