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Engineering Thermodynamics

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

Meter
Kilometer
Centimeter
Millimeter

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Engineering Thermodynamics
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

Possible, but with lot of sophistications
Impossible
Feasible
Possible

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Engineering Thermodynamics
The efficiency of the Carnot cycle may be increased by

Decreasing the highest temperature
Keeping the lowest temperature constant
Increasing the lowest temperature
Increasing the highest temperature

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

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

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Engineering Thermodynamics
The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)

rγ - 1
1 - rγ - 1
1 - (1/r) γ/γ - 1
1 - (1/r) γ - 1/ γ

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Engineering Thermodynamics
According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

Absolute temperature, if volume is kept constant
Temperature
Volume, if temperature is kept constant
None of these

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