Undercharging of coal in the by-product coke ovens results in ____________________? A. Decrease in the c.v. of coke oven gas B. Increase in its throughput C. Increase in the c.v. of coke oven gas D. No change in the c.v.…
Benzol is used_____________________? A. As a motor fuel blend B. For producing benzene, toluene & xylene by its distillationC. Both A. & B. D. Neither A. nor B.
Pulverised coal used in boiler firing need not have____________________? A. Less moisture contentB. High fusion point of its ash C. High bulk density D. Lower ash content
Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg? A. 1000B. 4000 C. 6000 D. 8000
About _____________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO? A. 2 B. 3 C. 4D. 5
Fischer-Tropsch method aims at the ______________________? A. Gasification of coalB. Synthesis of gasoline (from water gas) C. Hydrogenation of coal to produce gasoline D. None of these
In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by______________________? A. Potassium hydroxide B. Dilute potassium carbonate C. Cuprous chloride D. Alkaline pyrogallol solution
Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ? A. Sensible B. LatentC. Sensible and latent D. None of these
Producer gas comprises mainly of _______________________? A. CO & N2 B. CO & H2 C. CO2 & N2 D. CO2 & H2
Coke compared to the coal from which it has been made, contains ____________________? A. Less volatile matter B. More carbon C. Greater percentage of ashD. All A., B. and C.