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Engineering Thermodynamics

Engineering Thermodynamics
The value of cp/cv for air is

2.3
1.4
1.45
1

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Engineering Thermodynamics
The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by

Clausis
Kelvin
Joule
Gay-Lussac

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

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Engineering Thermodynamics
When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
Kelvin Planck's law

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Engineering Thermodynamics
Otto cycle consists of following four processes

Two isentropic and two constant pressures
Two isothermal and two isentropic
Two isentropic and two constant volumes
Two isentropic, one constant volume and one constant pressure

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Engineering Thermodynamics
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

3 Ru × T
Ru × T
1.5 Ru × T
2 Ru × T

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