cp – cv = R
Both (B) and (C)
✅ The correct answer is option D.
Thermodynamics MCQs
One m3 of methane (CH4) requires 2m3 of oxygen and produces 1m3 of carbon dioxide and 2m3 of water or steam.
Correct
Incorrect
✅ The correct answer is option A.
The heat and mechanical energies are mutually convertible. This statement was established by
Boyle
Charles
Joule
none of these
✅ The correct answer is option C.
The general law for the expansion or compression of gases, is
pv = C
pv = m R T
pvn = C
pvγ = C
✅ The correct answer is option C.
The volumetric or molar specific heat at constant pressure is the product of
molecular mass of the gas and the specific heat at constant volume
atomic mass of the gas and the gas constant
molecular mass of the gas and the gas constant
none of the above
✅ The correct answer is option D.
A process, in which the gas is heated or expanded in such a way that product of its pressure and volume remains constant, is called isothermal process.
Yes
No
✅ The correct answer is option B.
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules. This statement is called Avogadro’s law.
TRUE
FALSE
✅ The correct answer is option A.
The work ratio of simple gas turbine cycle depends upon
maximum cycle temperature
minimum cycle temperature
pressure ratio
all of these
✅ The correct answer is option D.
For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.
greater than
less than
equal to
✅ The correct answer is option B.
The heating of gas at constant volume is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option C.