higher
lower
✅ The correct answer is option A.
Thermodynamics MCQs
2. When the expansion or compression takes place according to the law pvn = C, the process is known as
isothermal process
adiabatic process
hyperbolic process
polytropic process
✅ The correct answer is option D.
3. The universal gas constant (or molar constant) of a gas is the product of
molecular mass of the gas and the gas constant
atomic mass of the gas and the gas constant
molecular mass of the gas and the specific heat at constant pressure
molecular mass of the
✅ The correct answer is option A.
4. Select the wrong statement
A Joule cycle consists of two constant volume and two isentropic processes.
An Otto cycle consists of two constant volume and two isentropic processes.
An Ericsson cycle consists of two constant pressure and two isothermal processes.
all of the above
✅ The correct answer is option A.
5. Kerosene is distilled at
65° to 220°C
220° to 345°C
345° to 470°C
470° to 550°C
✅ The correct answer is option B.
6. By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
TRUE
FALSE
✅ The correct answer is option B.
7. Carnot cycle has maximum efficiency for
petrol engine
diesel engine
reversible engine
irreversible engine
✅ The correct answer is option C.
8. The heating of a gas at constant pressure is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option B.
9. A molecule consisting of one atom is known as
monoatomic
diatomic
triatomic
polyatomic
✅ The correct answer is option A.
10. Producer gas is obtained by
partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
carbonisation of bituminous coal
passing steam over incandescent coke
passing air and a larg
✅ The correct answer is option A.