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Engineering Thermodynamics

Engineering Thermodynamics
The efficiency of Carnot cycle is maximum for

Steam engine
Gas engine
Petrol engine
Reversible engine

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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 v = constant, if T is kept constant
P/T = constant, if v 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
When a gas is heated at constant volume

Both temperature and pressure will increase
Its temperature will increase
Neither temperature nor pressure will increase
Its pressure will increase

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Engineering Thermodynamics
The unit of energy in S.I. units is

watt
Joule
joule/m
joule/s

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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

54 kJ
114 kJ
84 kJ
30 kJ

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Engineering Thermodynamics
The state of a substance whose evaporation from its liquid state is complete, is known as

Steam
Air
Vapour
Perfect gas

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MORE MCQ ON Engineering Thermodynamics

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