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Engineering Thermodynamics

Engineering Thermodynamics
The ratio of two specific heats of air is equal to

1.41
0.1
0.17
0.24

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Engineering Thermodynamics
A diathermic wall is one which

Prevents thermal interaction
Discourages thermal interaction
Encourages thermal interaction
Permits thermal interaction

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Engineering Thermodynamics
The value of 1 mm of Hg is equal to

13.33 N/m2
133.3 N/m2
1333 N/m2
1.333 N/m2

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Engineering Thermodynamics
The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

mR (T2 - T1)
mcv (T2 - T1)
mcp (T2 - T1)
mcp (T2 + T1)

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Engineering Thermodynamics
The absolute zero pressure will be

At sea level
At the temperature of - 273 K
At the center of the earth
When molecular momentum of the system becomes zero

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Engineering Thermodynamics
According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

Volume, if temperature is kept constant
Absolute temperature, if volume is kept constant
Temperature
None of these

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