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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following is a reversible non-flow process?

All of these
Isobaric process
Isochoric process
Hyperbolic process

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

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Engineering Thermodynamics
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

δQ = T.ds
None of the listed here
δQ = T/ds
dQ = ds/T

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Engineering Thermodynamics
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

Increase/decrease depending on application
Decrease
Increase
Remain unchanged

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Engineering Thermodynamics
The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents

Heat rejected
None of the listed here
Heat absorbed
Either heat absorbed or heat rejected

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Engineering Thermodynamics
Those substances which have so far not been resolved by any means into other substances of simpler form are called

Compounds
Atoms
Elements
Molecules

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