1 g
10 g
100 g
1000 g
✅ The correct answer is option D.
Thermodynamics MCQs
The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.
equal to
less than
greater than
✅ The correct answer is option C.
The state of a substance whose evaporation from its liquid state is complete, is known as
vapour
perfect gas
air
steam
✅ The correct answer is option B.
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)
δQ = T.ds
δQ = T/ds
dQ = ds/T
none of these
✅ The correct answer is option A.
The absolute zero pressure can be attained at a temperature of
0°C
273°C
273 K
none of these
✅ The correct answer is option D.
If the carbon content in the bituminous coal is 78 to 81%, it is said to be coking bituminous coal.
Agree
Disagree
✅ The correct answer is option B.
The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is
0.086
1.086
3.086
4.086
✅ The correct answer is option B.
The efficiency of Diesel cycle increases with increase in cut-off.
Yes
No
✅ The correct answer is option B.
The gas turbine cycle with regenerator improves
thermal efficiency
work ratio
avoids pollution
none of these
✅ The correct answer is option A.
The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
Boyle’s law
Charle’s law
Gay-Lussac law
Joule’s law
✅ The correct answer is option D.