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Engineering Thermodynamics

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

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Engineering Thermodynamics
In a no flow reversible process for which p = (-3V + 15) × 105 N/m², V changes from 1 m3 to 2 m3. The work done will be about

10 × 10⁵ joules
10 × 10⁵ kilo joules
1 × 10⁵ joules
100 × 10⁵ joules

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Engineering Thermodynamics
The behavior of super-heated vapour is similar to that of

Ordinary gas
Air
Steam
Perfect gas

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Engineering Thermodynamics
A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be

3000 Nm
300,000 Nm
300 Nm
30 Nm

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Engineering Thermodynamics
Work done is zero for the following process

Throttling
Free expansion
All of the listed here
Constant volume

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Engineering Thermodynamics
Reversed Joule cycle is known as

Carnot cycle
Stirling cycle
Bell-Coleman cycle
Rankine cycle

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MORE MCQ ON Engineering Thermodynamics

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