Chemical Engineering MCQs

Page No. 195

The speed of sound in an ideal gas varies as the __________________?


aTemperature

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bPressure

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cDensity

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dNone of these

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View Answer Temperature

Unsteady uniform flow is represented by flow through a/an_________________?


aLong pipe at constant rate

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bLong pipe at decreasing rate

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cExpanding tube at increasing rate

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dExpanding tube at constant rate

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The value of (Cp – Cv) for a real gas obeying Vander Wall’s equation is____________________?


aR

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b > R

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c< R

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d0.5 R

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View Answer > R

For flow of fluids through packed bed, the superficial velocity is_________________?


aLess than the average velocity through channels

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bMore than the average velocity through channels

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cDependent on the pressure drop across the bed

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dSame as the average velocity through channels

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Various efficiencies of a centrifugal pump are related as (where, εm = mechanical efficiency εv = volumetric efficiency. εma = manometric efficiency εo = overall efficiency) ?


aηma × ηm × ηv = ηo

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bηm = ηv . ηma

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cηma = ηm × ηv

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dηv = ηm × ηma

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View Answer ηm = ηv . ηma

For ideally incompressible fluid, the Mach number will be __________________?


a1.5

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b1

✓


c0

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d5

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View Answer 1

One ‘Therm’ is equivalent to___________________?


a105 BTU

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b105 kcal

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c109 BTU

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d109 kcal

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View Answer 105 BTU

The specific speed of a pump is defined as the speed of a unit of such a size, that it__________________?


aDelivers unit discharge at unit head

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bRequires unit power for unit head

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cDelivers unit discharge at unit power

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dNone of these

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Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is_________________?


a1.72

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b0.58

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c0.5

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d0.2

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View Answer 0.58

What is the normal range of exit cone angle of a Venturimeter ?


a2 to 5

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b7 to 15

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c15 to 25

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d>25

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View Answer 7 to 15

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