Online Quiz on Thermodynamics - Set 01 - ObjectiveBooks

# Quiz Questions

01. The conditions of temperature and pressure at 0°C (273 K) and 760 mm of Hg pressure are termed as __________ temperature and pressure.

02. One kg of carbon requires 8/3 kg of oxygen for its complete combustion and produces 11/3 kg of carbon dioxide gas.

03. When the finely ground coal is moulded under pressure with or without a binding material, the resulting fuel is called briquetted coal.

04. The amount of heat required to raise the temperature of unit mass of a gas through one degree at constant pressure is called specific heat at constant pressure.

05. The state of a substance, whose evaporation from its liquid state is partial, is known as steam.

06. Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules. This statement is called Avogadro's law.

07. A machine which violates the first law of thermodynamics is known as perpetual motion machine of the second kind.

08. If in the equation pv^n = C, the value of n = 1, then the process is called isothermal process.

09. A cycle consisting of two constant pressure and two isothermal processes is known as Ericsson cycle.

10. The amount of heat given out by the complete combustion of 1 kg of fuel is known as calorific value of solid or liquid fuel.

11. One m^3 of methane (CH4) requires 2m^3 of oxygen and produces 1m^3 of carbon dioxide and 2m^3 of water or steam.

12. To ensure complete and rapid combustion of a fuel, some quantity of air, in excess of the theoretical or minimum air is supplied.

13. The molecular mass of a substance is the number of times a molecule of that substance is heavier than the hydrogen atom.

14. The lower calorific value of fuel may be obtained by adding the heat of steam formed during combustion to the higher calorific value.

15. It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.

16. One kg of sulphur requires 1 kg of oxygen for complete combustion and produces 2 kg of sulphur dioxide.

17. The numerical value of the thermal capacity and the water equivalent of the substance are the same.

18. The efficiency of a dual combustion cycle __________ upon cut-off ratio.

19. The change of entropy, when heat is removed from the gas, is positive.

20. Coal gas consists mainly of hydrogen, carbon monoxide and various hydrocarbons.

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