Chemical Engineering MCQs

Page No. 176

Heat pump_______________________?


aAccomplishes only space heating in winter


bAccomplishes only space cooling in summer


c Accomplishes both A. and B


dWorks on Carnot cycle



The equation Tds = dE – PdV applies to___________________?


aSingle phase fluid of varying composition


bSingle phase fluid of constant composition


cOpen as well as closed systems


d Both B. and C


View Answer Both B. and C

Throttling (Joule-Thomson effect) process is a constant _____________ process?


aEnthalpy


b Entropy


cPressure


d None of these


View Answer Enthalpy

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.) ?


a TR/(T2 – TR) × (T1 – T2)/T1


b TR/(T2 – TR) × T1/(T1 – T2)


cTR/(T1 – TR) × (T1 – T2)/T1


d None of these



Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is__________________?


a2


b0


c1


d3


View Answer 2

The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is__________________?


a


b1


c0


d-ve


View Answer -ve

When a gas in a vessel expands, its internal energy decreases. The process involved is________________?


aReversible


bIrreversible


cIsothermal


d Adiabatic


View Answer Reversible

For a single component two phase mixture, the number of independent variable properties are_________________?


aTwo


b One


cZero


dThree


View Answer One

Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________________?


aCalorific value


bHeat of reaction


cHeat of combustion


dHeat of formation


View Answer Heat of combustion

What is the value of ln y (where y = activity co-efficient) for ideal gases ?


aZero


bUnity


cInfinity


dNegative


View Answer Zero

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