Coking time in beehive coke oven is about 2-3 days Two weeks 12 hours One week TRUE ANSWER : ? YOUR ANSWER : ?
Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C. Latent Sensible and latent None of these Sensible TRUE ANSWER : ? YOUR ANSWER : ?
High amount of sulphur and phosphorous in coke causes None of these Increase in its strength Brittleness of steel made by using it Decrease in its calorific value TRUE ANSWER : ? YOUR ANSWER : ?
Low temperature oxidation of coal during storage does not decrease its Caking power Calorific value None of these Oxygen content TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following gaseous fuels has the lowest calorific value? Converter gas Blast furnace gas Gobar gas Refinery gas TRUE ANSWER : ? YOUR ANSWER : ?
Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about 8800 kcal/m³ 25000 kcal/kg Same as that of coal middling 8800 kcal/kg TRUE ANSWER : ? YOUR ANSWER : ?
Fixed carbon in coal is defined as That present in volatile matters The total quantity of carbon present in the coal Hundred minus the percentage of volatile matter, ash and moisture The one which is present in the residue after combustion TRUE ANSWER : ? YOUR ANSWER : ?
Quantity of coke produced from metallurgical coal may be around __________ percent. 30 75 50 95 TRUE ANSWER : ? YOUR ANSWER : ?
Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as M = 1.1 A M = 0.5 A M = A M = 1.8 A TRUE ANSWER : ? YOUR ANSWER : ?
Benzol is used As a motor fuel blend Neither A nor B For producing benzene, tolune & xylene by its distillation Both A & B TRUE ANSWER : ? YOUR ANSWER : ?