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Engineering Thermodynamics

Engineering Thermodynamics
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)

1 - (T1/T2)
(T1/T2) - 1
1 - (T2/T1)
1 + (T2/T1)

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Engineering Thermodynamics
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.

Both (A) and (B)
Change
Do not change
None of these

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

Temperature
Internal energy
Volume
Pressure

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Engineering Thermodynamics
The gas constant (R) is equal to the

Product of two specific heats
Difference of two specific heats
Sum of two specific heats
Ratio of two specific heats

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Engineering Thermodynamics
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)

v2/v1
v1/v2
(v1 + v2)/v2
(v1 + v2)/v1

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Engineering Thermodynamics
If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as

Adiabatic expansion
Hyperbolic expansion
Free expansion
Throttling

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MORE MCQ ON Engineering Thermodynamics

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