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Engineering Thermodynamics

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

Volume
Pressure
Temperature
Enthalpy

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Engineering Thermodynamics
Which of the following process can be made reversible with the help of a regenerator?

Constant volume process
All of these
Constant pvn process
Constant pressure process

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Engineering Thermodynamics
The polytropic index (n) is given by

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

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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

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

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

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

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Engineering Thermodynamics
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant

Volume
Pressure
Internal energy
Temperature

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MORE MCQ ON Engineering Thermodynamics

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