Chemical Engineering MCQs

Page No. 176

Heat pump_______________________?


aAccomplishes only space heating in winter

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bAccomplishes only space cooling in summer

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c Accomplishes both A. and B

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dWorks on Carnot cycle

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The equation Tds = dE – PdV applies to___________________?


aSingle phase fluid of varying composition

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bSingle phase fluid of constant composition

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cOpen as well as closed systems

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d Both B. and C

✓


View Answer Both B. and C

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


aEnthalpy

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b Entropy

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cPressure

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d None of these

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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)

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cTR/(T1 – TR) × (T1 – T2)/T1

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d None of these

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


a2

✓


b0

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c1

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d3

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View Answer 2

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


a∞

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b1

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c0

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d-ve

✓


View Answer -ve

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


aReversible

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bIrreversible

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cIsothermal

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d Adiabatic

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View Answer Reversible

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


aTwo

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b One

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cZero

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dThree

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View Answer One

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


aCalorific value

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bHeat of reaction

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cHeat of combustion

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dHeat of formation

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View Answer Heat of combustion

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


aZero

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bUnity

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cInfinity

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dNegative

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View Answer Zero

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