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Engineering Thermodynamics

Engineering Thermodynamics
The following cycle is used for air craft refrigeration

Carnot cycle
Reversed Brayton cycle
Joule cycle
Brayton cycle

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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)

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

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Engineering Thermodynamics
The value of cp/cv for air is

1.4
1.45
2.3
1

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Engineering Thermodynamics
Reversed Joule cycle is known as

Rankine cycle
Bell-Coleman cycle
Stirling cycle
Carnot cycle

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Engineering Thermodynamics
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

Impossible
Possible, but with lot of sophistications
Possible
Feasible

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Engineering Thermodynamics
In a steady flow process, the ratio of

Mass flow at inlet and outlet is same
Work transfer is constant
Heat transfer is constant
All of these

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