A. Wood charcoal

B. Gasoline

D. Blast furnace coke

A. Increases the flame temperature

B. Tends to shorten the flame

C. Does not affect the flame length

A. Nuclear fission

B. Combustion

C. Nuclear fusion

A. None of these

B. Benzol

D. Tar

B. 36

C. 8

D. 12

A. Only O2

C. Both O2 and CO

D. All CO, CO2, and O2

A. 32 kg

B. 22.4 Nm3

D. 1kg mole

B. None of these

C. Gasification of coal

D. Hydrogenation of coal to produce gasoline

A. H2, CmHn & CO2

C. CO2, O2 & CO

D. N2, H2 & CO2

A. Operate at very high pressure

C. Cannot use coking coal

D. Is a moving bed reactor

A. Inherent impurities

B. Adhering impurities

C. Mineral matter

B. 400-500

C. 1400-1500

D. 1700-1800

A. Low octane number

B. Low calorific value

D. Low flash point

A. Adiabatic flame temperature

B. Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)

D. Heat release rate (thus requiring smaller combustion chamber)

A. Blast furnace gas

C. Water gas

D. Producer gas

B. Radium

C. Neptunium

D. Uranium

A. Humidity of combustion air

B. Moisture content of fuel

D. The water formed by combustion reaction

B. Kerosene

C. Natural gas

D. Coal

B. May increase or decrease; depends on the type of fuel

C. Increases

D. Remain same

B. Has higher calorific value

C. Has low quantity of mineral matter

D. Is not subjected to washing

A. Bituminous

C. Sub-bituminous

D. Lignite

B. Increase or decrease depending on the fuel type

C. Not change

D. Increase

A. 4.76

B. 0.21

C. 0.79

B. Producer gas

C. Water gas

D. Blast furnace gas

A. Coke oven gas

C. Gobar gas

D. Carburetted water gas

A. Ash content increases

B. Moisture content increases

D. Carbon content decreases

A. Specific gravity of coal increases with its increasing maturity

B. io of coal</strong>

D. Angle of repose of coal increases with its increasing size

E. Refractive index and reflectance of coal increases with the increasing rank of coal

B. Improves its coking properties

C. Increase the fusion point of its ash by removing chlorine compounds

D. Reduces its ash & sulphur content

A. Foundry coke

B. Beehive coke

D. Metallurgical coke

B. Less volatile matter

C. Greater percentage of ash

D. More carbon

A. Is desirable in producer gas manufacture

B. Has poor strength and abrasion resistance

D. None of these

A. Porosity

B. Coke reactivity index (CRI)

D. Both B. and C.

B. Fussain

C. Both A. & B.

D. Neither A. nor B.

A. < 90

C. 90-110

D. < 120

A. Permits the use of high ash content coal

B. All A., B. and C.

C. Permits the use of low fusion point ash coal

A. 8000

B. 1000

C. 6000

A. None of these

B. Producer gas

C. Coal gas from underground gasification of coal

A. ing pulverised fuel

C. Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible

D. l

E. Low grade coal can be used, but generally high volatile matter coals are more suitable for

F. Pulverised fuel can be completely burnt with less percentage of excess air compared to lump

A. Fuel consumption for the same heat load

B. Percentage of oxygen in flue gases

C. Stack gas temperature

A. Develops a non-luminous flame

B. Develops a low temperature flame

C. Provides a lower rate of heat release

B. Paraffins

C. Aliphatic compounds

D. Olefins

A. Dew point

B. CO2 content

C. O2 content

A. Equal to

B. Either more or less; depends on the type of fuel

C. Less than

A. High pressure gasification of coal (e.g. in Lurgi gasifier)

C. Partial combustion of coal

D. Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)

A. Junkers

C. Boys

D. None of these

A. Pneumatically convey the pulverised coal

B. None of these

C. Burn the lumpy coal

A. Maximum to minimum heat input ratio

B. Maximum to minimum permissible gas flow rate

D. Minimum to maximum heat input ratio

A. Carbon tetrachloride

C. None of these

D. Mineral oil of high viscosity & specific gravity (1.6)

A. Pyridine

B. Cerosote

C. Benzol

A. High concentration of oxygen in flue gas means high stack loss

B. The ratio of fixed carbon to volatile matter percentage in coal is called its fuel ratio

C. Gaseous fuels require the least % excess air for complete combustion