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Engineering Thermodynamics

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

All of the listed here
Temperature
Pressure
Volume

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Engineering Thermodynamics
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to

1200 K
1400 K
1000 K
800 K

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Engineering Thermodynamics
For a perfect gas, according to Boyle’s law (where P = Absolute pressure, V = Volume and T = Absolute temperature)

P/T = constant, if v is kept constant
P v = constant, if T is kept constant
V/T = constant, if p is kept constant
T/P = constant, if v is kept constant

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

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

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Engineering Thermodynamics
According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.

Remains constant
Increases
Decreases
None of these

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Engineering Thermodynamics
A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

30 kJ
84 kJ
114 kJ
54 kJ

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