Chemical Engineering MCQs

Page No. 195

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


aTemperature


bPressure


cDensity


dNone of these


View Answer Temperature

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


aLong pipe at constant rate


bLong pipe at decreasing rate


cExpanding tube at increasing rate


dExpanding tube at constant rate



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


aR


b > R


c< R


d0.5 R


View Answer > R

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


aLess than the average velocity through channels


bMore than the average velocity through channels


cDependent on the pressure drop across the bed


dSame as the average velocity through channels



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


bηm = ηv . ηma


cηma = ηm × ηv


dηv = ηm × ηma


View Answer ηm = ηv . ηma

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


a1.5


b1


c0


d5


View Answer 1

One ‘Therm’ is equivalent to___________________?


a105 BTU


b105 kcal


c109 BTU


d109 kcal


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


bRequires unit power for unit head


cDelivers unit discharge at unit power


dNone of these



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


b0.58


c0.5


d0.2


View Answer 0.58

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


a2 to 5


b7 to 15


c15 to 25


d>25


View Answer 7 to 15

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