271. Which of the following gas is mostly used in town for street and domestic lighting and heating?
Producer gas
Coal gas
Mond gas
Coke oven gas
✅ The correct answer is option B.
Thermodynamics MCQs
273. The value of gas constant (R) in S. I. units is
0.287 J/kgK
2.87 J/kgK
28.7 J/kgK
287 J/kgK
✅ The correct answer is option D.
274. The entropy __________ in an irreversible cyclic process.
remains constant
decreases
increases
✅ The correct answer is option C.
275. The efficiency of Diesel cycle increases with
decrease in cut-off
increase in cut-off
constant cut-off
none of these
✅ The correct answer is option A.
276. The absolute zero temperature is taken as
-273°C
273°C
237°F
-237°F
✅ The correct answer is option A.
277. When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.
atomisation
carbonisation
✅ The correct answer is option B.
279. There is no change in internal energy in an isothermal process.
Correct
Incorrect
✅ The correct answer is option A.
280. In the first law of thermodynamics, the total energy of the system remains constant.
TRUE
FALSE
✅ The correct answer is option A.