Yield of coke oven gas is 290 Nm³ /ton dry coal
Volatile matter in coke is zero
Temperature maintained is 700°C
Yield of tar is about 3% of dry coal
✅ The correct answer is option C.
Chemical Engineering MCQs
Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature?
Calorific value of the fuel
Flame temperature achieved
Speed of combustion of fuel
Heat transfer rate to the stock in the furnace
✅ The correct answer is option A.
In petroleum refining, the process used for conversion of hydrocarbons to aromatics is
catalytic cracking
catalytic reforming
hydrotreating
alkylation
✅ The correct answer is option B.
Which of the following fuels is the best for burning on chain grate stoker?
Non-caking coal
Caking coal
Coking coal
Pulverised coal
✅ The correct answer is option A.
With increase in density, the viscosity of petroleum products
increases
decreases
remains same
either (a) or (b)
✅ The correct answer is option A.
Name the hydrocarbon having the poorest oxidation stability.
naphthene
olefin
paraffin
aromatics
✅ The correct answer is option D.
Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?
Naphtha
Petrol
Kerosene
Heavy fuel oil
✅ The correct answer is option D.
Butadiene is a/an
di-olefin
naphthene
aromatic
olefin
✅ The correct answer is option A.
A coal having higher volatile matter content, has lower
Smoking tendency on burning
Coke oven gas yield on carbonisation
Chance of catching fire during storage in open space
Ignition temperature
✅ The correct answer is option D.
Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?
Producer gas
Carburetted water gas
Natural gas
Liquified petroleum gas
✅ The correct answer is option D.