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Engineering Thermodynamics

Engineering Thermodynamics
The value of one bar (in S. I. units) is equal to

1 × 104 N/m2
1 × 105 N/m2
1 × 102 N/m2
1 × 103 N/m2

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Engineering Thermodynamics
In an isothermal process, the internal energy of gas molecules

Increases
Decreases
Remain constant
May increase/decrease depending on the properties of gas

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Engineering Thermodynamics
The compression ratio for Diesel engines is

5 to 8
3 to 6
15 to 20
20 to 30

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Engineering Thermodynamics
Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits?

SO₂, NH₃, CO₂, moisture
O₂, N₂, H₂, air
O₂, N₂, steam, CO₂
O₂, N₂, water vapour

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Engineering Thermodynamics
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant

Pressure
Internal energy
Volume
Temperature

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Engineering Thermodynamics
Work done is zero for the following process

All of the listed here
Constant volume
Throttling
Free expansion

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