11. The principal constituents of a fuel are
carbon and hydrogen
oxygen and hydrogen
sulphur and oxygen
sulphur and hydrogen
✅ The correct answer is option A.
Thermodynamics MCQs
12. Otto cycle is also known as
constant pressure cycle
constant volume cycle
constant temperature cycle
constant temperature a
✅ The correct answer is option B.
13. The hyperbolic pocess is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option A.
14. Which of the following is an intensive property of a thermodynamic system?
Volume
Temperature
Mass
Energy
✅ The correct answer is option B.
15. When coal is first dried and then crushed to a fine powder by pulverising machine, the resulting fuel is called
wood charcoal
bituminous coal
briquetted coal
none of these
✅ The correct answer is option D.
16. Wood charcoal is produced by heating the wood at 100°C.
Yes
No
✅ The correct answer is option B.
17. According to First law of thermodynamics,
total internal energy of a system during a process remains constant
total energy of a system remains constant
workdone by a system is equal to the heat transferred by the system
internal energy, entha
✅ The correct answer is option B.
18. Which is the incorrect statement about Carnot cycle?
It is used as the alternate standard of comparison of all heat engines.
All the heat engines are based on Carnot cycle.
It provides concept of maximising work output between the two temperature limits.
all of the above
✅ The correct answer is option B.
19. Which of the following is the extensive property of a thermodynamic system?
Pressure
Volume
Temperature
Density
✅ The correct answer is option B.
20. A perpetual motion machine of the first kind is __________ according to first law of thermodynamics.
possible
impossible
✅ The correct answer is option B.