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Engineering Thermodynamics

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

1.27
1.35
0.75
1

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Engineering Thermodynamics
The gas constant (R) is equal to the

Sum of two specific heats
Product of two specific heats
Ratio of two specific heats
Difference of two specific heats

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Engineering Thermodynamics
Addition of heat at constant pressure to a gas results in

Raising its volume
Raising its temperature and doing external work
Raising its pressure
Raising its temperature

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Engineering Thermodynamics
The amount of heat generated per kg of fuel is known as

Calorific value
Higher calorific value
Lower calorific value
Heat energy

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Engineering Thermodynamics
The following cycle is used for air craft refrigeration

Joule cycle
Carnot cycle
Reversed Brayton cycle
Brayton cycle

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Engineering Thermodynamics
The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)

1 + rγ - 1
1 - rγ - 1
1 + (1/ rγ - 1)
1 - (1/ rγ - 1)

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