B. 300-600

C. > 120

D. > 280

B. Sewage gas

C. Natural gas

D. Coal bed methane (CBM)

A. Complete combustion of coal

B. Direct hydrogenation of coal

D. Underground gasification of coal

A. Coal can be pulverised with great difficulty

B. Power consumption in grinding the coal will be very high

D. Coal cant be pulverised

A. Higher amount of methane

B. Lower amount of hydrogen

D. Higher amount of both methane and hydrogen

A. None of these

B. Reduces the coking time

C. Increases the loss of fine coal dust from the ovens when charging

E. n walls</strong>

A. Both steam and electrical power

B. Lean gas (e.g., B.F. gas)

C. Rich gas (e.g., coke oven gas)

B. < 1

C. 1

D. Unpredictable

A. None of these

C. Less heat transfer surface area is required in boilers

D. It achieves higher fuel combustion efficiency

B. Tar

C. Molasses

D. Pitch

B. Transportation and handling

C. Washing

D. Storage

A. Fusion point of ash

C. S & P content

D. Heating value

A. None of these

B. Have high calorific value

D. Have high adiabatic flame temperature

A. Is less liable to spontaneous combustion on storage

B. Requires smaller combustion space and less secondary air

D. Is more difficult to ignite and produces a shorter flame

A. It is stored in tall heaps

C. Smaller fines are stored in large quantity

D. It contains large amount of volatile matter

A. Cokes of high reactivity are obtained from weakly coking coals

C. Reactivity of coke is inversely proportional to its absolute density

D. Abrasion index of the coke is a measure of its hardness

A. None of these

C. Pulverised coal

D. Fuel oil

A. 36

C. 6

D. 28

A. 50

B. 75

C. 10

B. Winkler process

C. All can produce same methane content

D. Kopper-Totzek process

A. Unpredictable

B. > 1

C. 1

A. 550

B. 750

D. 1150

A. Lignites

B. Anthracites

D. Semi-anthracites

A. As moisture proof coating on fibres

C. As a fuel in furnaces

D. For making electrodes

A. Sub-bituminous coal

B. Blast furnace coke

C. Anthracite coal

A. No possibility of obtaining complete combustion at high temperature

B. Always loss of heat from the flame

D. Neither A. nor B.

B. Natural gas

C. Carburetted water gas

D. Producer gas

B. All tar is evolved at 700C

C. Hard semi-coke starts shrinking at 600C

B. Improves its coking properties

C. Reduces its sulphur and ash content

D. Controls its ash fusibility and increases its calorific value

A. Solid fuels

B. Liquid fuels

C. Premature fuels with low calorific value

A. Carbon, volatile matter, ash & moisture

C. Carbon, ash, sulphur & nitrogen

D. Carbon, sulphur, volatile matter & ash

B. Hydrogen percentage in the coke oven gas decreases

C. Tar yield increases

D. Methane percentage in the coke oven gas increases

A. 10

B. 12.5

D. 20

A. Coke oven gas and L.P.G

B. Coke oven gas and converter gas

D. Blast furnace gas and naphtha vapor

A. Coalification

C. Variation of coal quality with depth

D. Origin of petroleum oil

A. Silica gel

B. Basalt

C. Diatomaceous earth

A. 1,800

B. 3,200

D. 10,200

A. Calorific value

B. Caking power

C. Hydrogen content

A. M = A

B. M = 2A

D. M = 1.5A

A. Produce smaller coke

B. Produce stronger coke

D. Require less time of carbonisation

A. Ash

B. Moisture

D. Sulphur & phosphorus

A. Sewage gas

B. Bagasse

D. Refinery gas

A. None of these

B. Blast furnace

C. Foundry

B. Fixed carbon and heating value around 132 BTU/1b

C. None of these

D. Ash and heating value around 13, 200 BTU/1b

B. 12 hours

C. Two weeks

D. One week

A. CO + H2O ? CO2 + H2

B. C + 2H2O ? CO2 + 2H2

D. C + H2O ? CO + H2

A. CO2, CO, O2

B. CO, O2, CO2

D. O2, CO2, CO

B. 1400

C. 1350

D. 1250

A. Calorific value

C. Caking index

D. Yield of carbonised products

A. 900

B. 7500

D. 2000