Main constituents of purified Lurgi gas are___________________?
A. H2, CmHn & CO2
B. CO, H2 & CH4
C. CO2, O2 & CO
D. N2, H2 & CO2
Fuels and Combustion
Which of the following is coking ?
Which of the following is coking ?
A. Vitrain
B. Fussain
C. Both A. & B.
D. Neither A. nor B.
Compound coke ovens are those which can be heated by __________________?
Compound coke ovens are those which can be heated by __________________?
A. Both steam and electrical power
B. Lean gas (e.g., B.F. gas)
C. Rich gas (e.g., coke oven gas)
D. Both B. and C.
Out of the following fuels, the difference between the net and gross calorific value is maximum in case of_________________?
Out of the following fuels, the difference between the net and gross calorific value is maximum in case of_________________?
A. Pitch
B. Fuel oil
C. Blast furnace gas
D. Bituminous coal
Calorific value of ____________________?
Calorific value of ____________________?
A. Light paraffinic fuel oils is equal to that of equivalent olefins
B. n-paraffin is lower than that of iso-paraffins of the same compounds
C. Light paraffinic fuel oils is higher than that of equivalent olefins
D. Light paraffinic fuel oils is lower than that of equivalent olefins
_____________ present in coal is not determined in its ultimate analysis ?
_____________ present in coal is not determined in its ultimate analysis ?
A. Fixed carbon
B. Total carbon
C. Hydrogen
D. Nitrogen
Coke made in narrower by-product coke ovens (as compared to wider ovens) is _____________________?
Coke made in narrower by-product coke ovens (as compared to wider ovens) is _____________________?
A. Less reactive
B. Stronger
C. Smaller in size
D. All A., B. & C.
Gray King Assay and Swelling Index of a coal is a measure of its ____________________?
Gray King Assay and Swelling Index of a coal is a measure of its ____________________?
A. Swelling characteristics
B. Abradability
C. Agglutinating properties
D. Resistance to impact breakage
Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about ______________ percent as compared to the use of atmospheric combustion air?
Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about ______________ percent as compared to the use of atmospheric combustion air?
A. 5
B. 10
C. 20
D. 35
In low temperature carbonisation of coal, the________________?
In low temperature carbonisation of coal, the________________?
A. Yield of coke oven gas is 290 Nm3 /ton dry coal
B. Volatile matter in coke is zero
C. Temperature maintained is 700°C
D. Yield of tar is about 3% of dry coal