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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following has the minimum atomic mass?

Sulphur
Carbon
Oxygen
Nitrogen

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Engineering Thermodynamics
A molecule consisting of one atom is known as

Poly-atomic
Tri-atomic
Mono-atomic
Di-atomic

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

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Engineering Thermodynamics
In closed cycle gas turbine, the air is compressed

Polytropically
None of these
Isothermally
Isentropically

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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
dQ = ds/T
δQ = T/ds

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Engineering Thermodynamics
A cycle consisting of two constant pressure and two isentropic processes is known as

Carnot cycle
Otto cycle
None of the listed here
Stirling cycle

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