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Engineering Thermodynamics

Engineering Thermodynamics
Superheated vapour behaves

As steam
Approximately as a gas
Exactly as gas
As ordinary vapour

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Engineering Thermodynamics
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to

1200 K
1000 K
1400 K
800 K

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Engineering Thermodynamics
Which of the following processes are thermodynamically reversible?

Isothermal and adiabatic
Constant volume and constant pressure
Free expansion
Throttling

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Engineering Thermodynamics
Which of the following gas has a minimum molecular mass?

Hydrogen
Methane
Nitrogen
Oxygen

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Engineering Thermodynamics
The general law for the expansion or compression of gases, is

pv = C
pv = m R T
pvn = C
pvγ = C

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Engineering Thermodynamics
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

cv = R/ γ-1
Both (B) and (C)
cv/ cp =R
cp - cv = R

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MORE MCQ ON Engineering Thermodynamics

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