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Engineering Thermodynamics

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

Ru × T
1.5 Ru × T
2 Ru × T
3 Ru × T

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Engineering Thermodynamics
Minimum work in compressor is possible when the value of adiabatic index ‘n’ is equal to

1.35
1
0.75
1.27

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Engineering Thermodynamics
When the gas is cooled at constant pressure,

Both temperature and volume increases
Its volume increases but temperature decreases
Its temperature increases but volume decreases
Both temperature and volume decreases

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Engineering Thermodynamics
One watt is equal to

1 Nm/hr
1 Nm/s
1 N/m
1 kNm/hr

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Engineering Thermodynamics
A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be

300,000 Nm
30 Nm
300 Nm
3000 Nm

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Engineering Thermodynamics
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order

Diesel cycle, Otto cycle, Dual cycle
Dual cycle, Diesel cycle, Otto cycle
Otto cycle, Diesel cycle, Dual cycle
Dual cycle, Otto cycle, Diesel cycle

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MORE MCQ ON Engineering Thermodynamics

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