Chemical Engineering MCQs

Page No. 190

The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_____________________?


aRelative humidity

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bRelative saturation

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cPercentage saturation

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dNone of these

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View Answer Percentage saturation

Vena-contracta pressure tapping is at a distance _______________ from the position of an orificemeter fitted in a pipe of internal diameter ‘d’ ?


ad

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b0.5 d

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c2d

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d4d

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View Answer 0.5 d

Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid________________?


aLies above the centroid of the plane surface

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bIs independent of the specific weight of the fluid

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cIs different for different fluids

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dIs at the centroid of the plane surface

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Manometers measure the ______________ pressure?


aVacuum as well as the atmospheric

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bDifference in

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cAbsolute

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dGage

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View Answer Difference in

How much O2 can be obtained from 90 kg of water ?


a32 kg

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b80 kg

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c64 kg

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d90 kg

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View Answer 80 kg

Pitot tube measures the ______________ of a fluid?


aPressure

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bAverage velocity

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cAverage flow rate

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dPoint velocity

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View Answer Point velocity

For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is _______________?


aMore

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bLess

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cEqual

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dMore or less, depending on the type of particle

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View Answer More

What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?


aAB3

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bA2B3

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cA2B

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d AB2

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View Answer AB3

What causes cavitation in centrifugal pump ?


aHigh suction pressure

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bLow barometric pressure

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cLow suction pressure

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dHigh suction velocity

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View Answer Low suction pressure

The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and___________________?


aMoving

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bStatic

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cCold

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dHot

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View Answer Moving

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