Related Questions

Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
A 1000
B 4000
C 6000
D 8000
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about
A 0.1
B 1
C 2.5
D 3.5
The liquid used for the washing of coal in an industrial coal washery is a mixture of water and
A Carbon tetrachloride
B Sand (40%)
C Mineral oil of high viscosity & specific gravity (1.6)
D None of these
Burning of coal produces oxides of sulphur and nitrogen which combined with water vapor leads to
A acid rain
B brackish water
C forest fire
D soil pollution
Sulphur in coal results in
A Corroding air heaters
B Spontaneous combustion during coal storage
C Facilitating ash precipitation
D All of the above
Sulphur in metallurgical coal
A Contributes to its heating value
B Affects the quality of steel produced as cracks develop on the surface while rolling the steel
C Both A and B
D Neither A nor B
Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
A 3-5
B 25-30
C 60-65
D 95-100
The ultimate analysis of coal consists of the determination of the percentage of
A Carbon
B Hydrogen and nitrogen
C Sulphur and ash
D All of these
During its calorific value determination by bomb calorimeter, coal is combusted by
A Air
B Oxygen
C Oxygen enriched air
D None of these
A mixture contains 2/5 of element A and 3/5 of element B. When 5ml of A is added to the mixture, the proportion of B in the mixture changes to 1/5. What amount of A was originally present in the mixture before the addition was made ?
A 1ml
B 1.5ml
C 2.5ml
D 6ml

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