pressure
volume
temperature
all of these
✅ The correct answer is option D.
Thermodynamics MCQs
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
combustion is at constant volume
expansion and compression are isentropic
maximum temperature is higher
heat rejection is lowe
✅ The correct answer is option D.
During which of the following process does heat rejection takes place in Carnot cycle?
Isothermal expansion
Isentropic expansion
Isothermal compression
Isentropic compression
✅ The correct answer is option C.
Liquid fuels have lower efficiency than solid fuels.
TRUE
FALSE
✅ The correct answer is option B.
The polytropic index (n) is given by
✅ The correct answer is option B.
The lower calorific value of fuel may be obtained by adding the heat of steam formed during combustion to the higher calorific value.
Yes
No
✅ The correct answer is option B.
The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as
enthalpy
internal energy
entropy
external energy
✅ The correct answer is option C.
Ericsson cycle consists of two constant pressure and two isothermal processes.
Agree
Disagree
✅ The correct answer is option A.
The gas constant (R) is equal to the __________ of two specific heats.
sum
difference
product
ratio
✅ The correct answer is option B.
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)
Ru x T
1.5 Ru x T
2 Ru x T
3 Ru x T
✅ The correct answer is option B.