Last updated: November 2, 2020
1. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
2. The processes occurring in open system which permit the transfer of mass to and from the system, are known as
3. When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.
4. The efficiency of Diesel cycle approaches to Otto cycle efficiency when
5. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
6. There is a loss of heat in an irreversible process.
7. An adiabatic process is one in which
8. Workdone in a free expansion process is
9. Which of the following is the lightest and most volatile liquid fuel?
10. Which of the following has the minimum atomic mass?
11. Which of the following represents Otto cycle on temperature - entropy (T - s) diagram?
12. The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas.
13. Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.
14. The compression ratio for petrol engines is
15. The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).
16. The most probable velocity of the gas molecules is given by
17. Carbonisation of coal consists of
18. The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is
19. There is no change in internal energy in an isothermal process.
20. The atomic mass of oxygen is
Thermodynamics MCQ 1
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