Chemical Engineering MCQs

Page No. 200

A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?


a0.16

✖


b0.33

✓


c0.66

✖


d0.47

✖


View Answer 0.33

A mono pump is a __________ pump ?


aCentrifugal

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bPiston

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cPositive acting rotary

✓


dA group of vacuum

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Vapor pressure of a solution is proportional to (where, Sv and St are mole fraction of solvent and solute respectively) ?


aSv

✓


b1/St

✖


cSt

✖


d1/Sv

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View Answer Sv

Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the___________________?


aPipe length

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bFluid velocity in the pipe

✖


cTime taken to close the valve

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dAll A., B. and C.

✓


View Answer All A., B. and C.

The value of gas constant ‘R’ is ______________ kcal/kg.mole.°C?


a 2.79

✖


b1.987

✖


c 3.99

✖


dNone of these

✓


View Answer None of these

If more than two branches of pipes are to be connected at the same point, then use a/an_________________?


aElbow

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bUnion

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cTee

✓


dNone of these

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View Answer Tee

In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?


a Kg of solute/kg of solvent

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bKg-mole of solute/kg-mole of solvent

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cKg-mole of solute/1000 kg of solvent

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dAll A., B. & C.

✓


View Answer All A., B. & C.

In fluid flow, the boundary layer separation cannot occur___________________?


aIn case of boundaries experiencing form drag

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bAt points of abrupt changes in the flow directions

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cIn laminar flow

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dNone of these

✓


View Answer None of these

Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg ?


a1

✖


b0.1

✖


c0.01

✓


d0.001

✖


View Answer 0.01

Unit of mass velocity is___________________?


akg/m.hr

✖


bkg/m2.hr

✓


ckg/hr

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d kg/m2

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View Answer kg/m2.hr

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