Chemical Engineering MCQs

Page No. 194

Steady flow occurs, when the__________________?


aConditions change steadily with time


bConditions are the same at the adjacent points at any instant


cConditions do not change with time at any point


dRate of the velocity change is constant



A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO2, 0.05 gm mole of oxygen and 0.80 gm mole of N2. What is its molecular weight ?


a28.6


b30.0


c 30.6


d32.6


View Answer 30.6

Euler’s equation of motion states, that at every point, the_________________?


aFluid momentum is constant


bForce per unit mass equals acceleration


cRate of mass outflow is equal to the rate of mass inflow


dNone of these



1 Kcal/kg. °C is equivalent to _______________ BTU/lb. °F ?


a1


b2.42


c4.97


dNone of these


View Answer 1

For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe, plot is____________________?


a1


b-1


c0.5


d-0.5


View Answer -1

For a specific centrifugal air blower operating at constant speed & capacity, the power requirement and pressure vary_______________?


aDirectly as square of gas density


bDirectly as gas density


cDirectly as square root of gas density


dInversely as gas density



For the gaseous phase reaction, N2 + O2 ⇌ 2NO, ΔH = + 80 kJ/kg. mole; the decomposition of NO is favoured by____________________?


aIncreasing the concentration of N2


bDecrease in temperature


c Increase in pressure


dDecrease in pressure



The discharge co-efficient for an orifice meter does not depend upon the ___________________?


aPipe length


bRatio of pipe diameter to orifice diameter


cType of orifice & the Reynolds number


dPipe diameter


View Answer Pipe length

Velocity at a certain point in case of streamline flow is_________________?


aConstant


bIndependent of time


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

In _______________ process, ions of salts react with water to produce acidity or alkalinity ?


aHydration


bHydrolysis


c Electrolysis


dDialysis


View Answer Hydrolysis

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