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

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Engineering Thermodynamics
The heating of a gas at constant pressure is governed by

Avogadro's law
Boyle's law
Gay-Lussac law
Charles' law

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Engineering Thermodynamics
The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will

Decrease
Increase
Remain unchanged
Increase/decrease depending on application

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Engineering Thermodynamics
The general law for the expansion or compression of gases, is

pv = C
pvγ = C
pvn = C
pv = m R T

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Engineering Thermodynamics
The efficiency of Diesel cycle with decrease in cut-off

First decreases and then increases
Decreases
First increases and then decreases
Increases

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Engineering Thermodynamics
The absolute zero temperature is taken as

237°C
-237°C
273°C
-273°C

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MORE MCQ ON Engineering Thermodynamics

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