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Engineering Thermodynamics

Engineering Thermodynamics
The efficiency of Diesel cycle depends upon

Pressure ratio
Compression ratio
Cut-off ratio and compression ratio
Temperature limits

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Engineering Thermodynamics
If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

Temperature
Volume
Pressure
Enthalpy

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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

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

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Engineering Thermodynamics
The heating of a gas at constant pressure is governed by

Boyle's law
Avogadro's law
Charles' law
Gay-Lussac law

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Engineering Thermodynamics
The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

1.086
1.086
0.086
4.086

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Engineering Thermodynamics
The polytropic index (n) is given by

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

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MORE MCQ ON Engineering Thermodynamics

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