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Engineering Thermodynamics

Engineering Thermodynamics
When a gas is heated, change takes place in

All of the listed here
Volume
Pressure
Temperature

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Engineering Thermodynamics
The throttling process is __________ process.

None of these
Irreversible
Reversible or irreversible
Reversible

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Engineering Thermodynamics
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

δQ = T.ds
None of the listed here
δQ = T/ds
dQ = ds/T

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Engineering Thermodynamics
The polytropic index (n) is given by

log (p1p2)/log (v1v2)
log [(p1v1)/(p2v2)]
log (p2/ p1)/log (v1/ v2)
log (v1/ v2)/ log (p1/p2)

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Engineering Thermodynamics
The calorific value of gaseous fuel is expressed in

kJ/m3
kJ
kJ/m2
kJ/kg

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Engineering Thermodynamics
According to kinetic theory of gases, the absolute zero temperature is attained when

Pressure of the gas is zero
Specific heat of gas is zero
Kinetic energy of the molecules is zero
Volume of the gas is zero

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