281. The constant pressure, constant volume and constant pvn processes are regarded as irreversible process.
TRUE
FALSE
✅ The correct answer is option A.
Thermodynamics MCQs
282. Coal gas is obtained by mixing coal and gas at ambient conditions.
Yes
No
✅ The correct answer is option B.
283. If the value of n = 0 in the equation pvn = C, then the process is called
constant volume process
adiabatic process
constant pressure process
isothermal process
✅ The correct answer is option C.
284. Which of the following is the lightest and most volatile liquid fuel?
Gasoline
Kerosene
Fuel oil
✅ The correct answer is option A.
285. One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
[A]. All
[B]. 4/7
[C]. 11/4
[D]. 9/7
✅ The correct answer is option B.
286. The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.
[A]. Correct
[B]. Incorrect
null
null
✅ The correct answer is option A.
287. According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant.
[A]. True
[B]. False
null
null
✅ The correct answer is option A.
288. Which of the following is correct?
[A]. Absolute pressure = Gauge pressure + Atmospheric pressure
[B]. Gauge pressure = Absolute pressure + Atmospheric pressure
[C]. Atmospheric pressure = Absolute pressure + Gauge pressure
[D]. Absolute pressure = Gauge pressure – Atmospheric pressure
✅ The correct answer is option A.
289. Workdone in a free expansion process is
[A]. zero
[B]. minimum
[C]. maximum
[D]. positive
✅ The correct answer is option A.
290. When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.
[A]. True
[B]. False
null
null
✅ The correct answer is option A.