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Engineering Thermodynamics

Engineering Thermodynamics
If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to

-ve
+ve
Anywhere between zero and infinity
Zero

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Engineering Thermodynamics
Calorie is a measure of

Specific heat
Quantity of heat
Entropy
Thermal capacity

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Engineering Thermodynamics
The polytropic index (n) is given by

log (p1p2)/log (v1v2)
log (p2/ p1)/log (v1/ v2)
log [(p1v1)/(p2v2)]
log (v1/ v2)/ log (p1/p2)

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Engineering Thermodynamics
For the same compression ratio, the efficiency of dual combustion cycle is

Greater than Diesel cycle and less than Otto cycle
Less than Diesel cycle
Greater than Diesel cycle
Less than Diesel cycle and greater than Otto cycle

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Engineering Thermodynamics
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order

Dual cycle, Otto cycle, Diesel cycle
Otto cycle, Diesel cycle, Dual cycle
Dual cycle, Diesel cycle, Otto cycle
Diesel cycle, Otto cycle, Dual cycle

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Engineering Thermodynamics
The main cause for the irreversibility is

All of these
Mechanical and fluid friction
Unrestricted expansion
Heat transfer with a finite temperature difference

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MORE MCQ ON Engineering Thermodynamics

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