Q. The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Boyle's law.

View solution

Q. The fuel mostly used in cement industry and in metallurgical processes is

View solution

Q. The principal constituents of a fuel are

View solution

Q. In an extensive property of a thermodynamic system

View solution

Q. When a gas is heated at constant pressure

View solution

Q. By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.

View solution

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

View solution

Q. Wood charcoal is produced by heating the wood at 100°C.

View solution

Q. The __________ is obtained when carbonisation of coal is carried out at 500° to 700° C.

View solution

Q. The bomb calorimeter is used for finding the __________ calorific value of solid and liquid fuels.

View solution

Q. The efficiency of the Carnot cycle may be increased by

View solution

Q. The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)

View solution

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

View solution

Q. According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) __________ with the change in pressure and temperature of the gas.

View solution

Q. One molecule of oxygen is __________ times heavier than the hydrogen atom.

View solution

Q. Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

View solution

Q. The property of the system, whose value for the entire system is equal to the sum of their values for the individual parts of the system is called extensive property

View solution

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

View solution

Q. High air-fuel ratio in gas turbines

View solution

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

View solution