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Engineering Thermodynamics

Engineering Thermodynamics
Superheated vapour behaves

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

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Engineering Thermodynamics
The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is

848 kgfm/mol °K
427 kgfm/mol °K
8314 kgfm/mol °K
29.27 kgfm/mol °K

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Engineering Thermodynamics
The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

pv = RTm
pv = (RT)m
pvm = C
pv = mRT

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Engineering Thermodynamics
If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly

Entropy
Temperature
Enthalpy
Internal energy

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Engineering Thermodynamics
One kg of carbon requires 4/3 kg of oxygen and produces ________ kg of carbon monoxide gas.

44142
44015
44046
44138

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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)
cv = R/ γ-1
cp - cv = R

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MORE MCQ ON Engineering Thermodynamics

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