A. CO

B. N2

C. O2

A. Controlling the dust nuisance while charging the coal

B. in the gas (due to the endothermic reaction represented by C + H2O = CO + H2)

D. Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO &

E. Prevention of clinker formation in the oven

B. Ball

C. Tube

D. Rod

A. Semi-anthracite

B. Anthracite

C. Lignite

B. Converter gas

C. Refinery gas

D. Gobar gas

A. It achieves higher fuel combustion efficiency

B. None of these

D. Less heat transfer surface area is required in boilers

A. Steam ejector

B. Forced draft fan

D. Induced draft fan

B. Ash content increases

C. Carbon content decreases

D. Moisture content increases

A. Carborundum

C. Chromite

D. Fireclay

A. Contains more volatile matter than bituminous coal

B. Is essentially a coking coal

D. Ignites more easily than bituminous coal

B. Exhibit wetting characteristics

C. Are not resistant to corrosion by slag

D. Exhibit high shrinkage on thermal treatment

B. Smoke point

C. Kindling temperature

D. Fire point

A. Cristobalite

B. None of these

C. Tridymite

A. 10

B. 0.5

C. 20

A. Moisture

B. Ash

C. Volatiles

A. Coal gas from underground gasification of coal

B. None of these

C. Producer gas

B. O2 content

C. CO2 content

D. Dew point

A. Fixed carbon and a heating value of 132 BTU/1b

B. None of these

C. Ash and a heating value of 13, 200 BTU/1b

A. 10

B. 15

C. 20

A. Magnesite

B. Chromite

C. Forsterite

B. Hydrogen content

C. Caking power

D. Calorific value

A. 1100

C. 500

D. 950

A. Thermal conductivity

C. Electrical conductivity

D. Fusion point

B. Remain unchanged

C. Increase

D. Decrease

A. All the above

B. Cooling

D. Preheating

B. Tar dolomite bricks

C. High alumina bricks

D. Fireclay bricks

A. Inherent impurities

B. Adhering impurities

C. Mineral matter

B. Diatomaceous earth

C. Basalt

D. Silica gel

A. Benzol

B. Cerosote

C. Pyridine

A. C2H6

B. C3H8

C. H2

A. Natural gas

B. Coke oven gas

D. Sewage gas

B. Decrease in its calorific value

C. None of these

D. Increase in its strength

A. Always more than 2500C

B. Increased by the addition of basic oxides

D. Not affected by the addition of basic oxides

A. None of these

C. Back draughting

D. Under pressurising

A. All A., B. and C.

C. Have lower thermal conductivity than fireclay bricks

D. Cannot be used in the dome of hot blast stoves

A. Very little ash content

C. Low adiabatic flame temperature

D. High fusion point of its ash

B. Copper melting furnaces & converters

C. Side walls of soaking pits and arc furnaces

D. Burner block of glass tanks

B. M = A

C. M = 1.5A

D. M = 2A

B. Electric furnaces

C. Blast furnace hearth

D. Highly chemical resistant equipments

A. Height of the coal heap should be < 3 metres

B. Maximum 200 tons should be stored in a heap

D. Neither A. nor B.

A. As moisture proof coating on fibres

C. As a fuel in furnaces

D. For making electrodes

A. C + H2O ? CO + H2

B. CO + H2O ? CO2 + H2

C. C + 2H2O ? CO2 + 2H2

A. Physical structure

B. Presence of impurities like iron & alkali

C. Chemical composition

A. Silica

B. Magnesite

D. Corundum

A. 180

B. 30

D. 120

A. High porosity

C. Both A. and B.

D. Neither A. not B.

A. Ammonium nitrate

C. Ammonium phosphate

D. None of these

A. Junkers

B. Boys

C. None of these

A. Lignite

B. Bituminous

D. Sub-bituminous

A. Reduces its sulphur and ash content

C. Improves its coking properties

D. Controls its ash fusibility and increases its calorific value