Fuels and Combustion Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher Calorific value Higher C/H ratio Sulphur content Difference in gross & net calorific value Calorific value Higher C/H ratio Sulphur content Difference in gross & net calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction? C + 2H₂O ⟷ CO₂ + 2H₂ 2CO ⟷ C + CO₂ CO + H₂O ⟷ CO₂ + H₂ C + H₂O ⟷ CO + H₂ C + 2H₂O ⟷ CO₂ + 2H₂ 2CO ⟷ C + CO₂ CO + H₂O ⟷ CO₂ + H₂ C + H₂O ⟷ CO + H₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In general, the limit of inflammability/explosion limit of fuel gases is widened by the Increase in gas pressure Increase in temperature (i.e. preheating) Use of pure oxygen for combustion instead of air All of these Increase in gas pressure Increase in temperature (i.e. preheating) Use of pure oxygen for combustion instead of air All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion L.D. converter gas (produced in steel plant) comprises mainly of CO₂ & O₂ CO₂ & H₂ CO & O₂ CO (upto 65%) & CO₂ CO₂ & O₂ CO₂ & H₂ CO & O₂ CO (upto 65%) & CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker. 1100 1400 1350 1250 1100 1400 1350 1250 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C ANSWER DOWNLOAD EXAMIANS APP
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