Thermodynamics - Mechanical Engineering Multiple Choice Questions and Answers for Competitive exams, Interview and entrance exams.
1) Which of the following variables controls the physical properties of a perfect gas
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1) Which of the following variables controls the physical properties of a perfect gas
- pressure
- temperature
- volume
- all of the above
- atomic mass
Show Answer
Answer = all of the above
2) Which qf the following laws is applicable for the behavior of a perfect gas
- Boyle's law
- Charles'law
- Gay-Lussac law
- all of the above
- Joule's law
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Answer = all of the above
3) The unit of temperature in S.I. units is
- Centigrade
- Celsius
- Fahrenheit
- Kelvin
- Rankine
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Answer = Kelvin
4) The unit of mass in S.I. units is
- kilogram
- gram
- tonne
- quintal
- newton
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Answer = kilogram
5) The unit of time in S.I. units is
- second
- minute
- hour
- day
- year
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Answer = second
6) The unit of length in S.I. units is
- meter
- centimeter
- kilometer
- millimeter
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Answer = meter
7) The unit of energy in S.I. units is
- watt
- joule
- joule/s
- joule/m
- joule m
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Answer = joule
8) According to GayLussac law for a perfect gas, the absolute pressure of given mass varies directly as
- temperature
- absolute
- absolute temperature, if volume is kept constant
- volume, if temperature is kept constant
- remains constant,if volume and temperature are kept constant
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Answer = absolute temperature, if volume is kept constant
9) An ideal gas as compared to a real gas at very high pressure occupies
- more volume
- less volume
- same volume
- unpredictable behavior
- no such correlation
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Answer = more volume
10) General gas equation is
- PV=nRT
- PV=mRT
- PV = C
- PV=KiRT
- Cp-Cv = Wj
Show Answer
Answer = PV=mRT
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