Fuels and Combustion Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³. 3200 10200 5400 1800 3200 10200 5400 1800 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to None of these Minimise its corrosion Avoid radiation heat loss Make it look attractive None of these Minimise its corrosion Avoid radiation heat loss Make it look attractive ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal Hard semi-coke starts shrinking at 600°C All tar is evolved at < 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C All tar is evolved at < 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The pyragallol solution used in orsat apparatus can absorb All of these Both O₂ and CO Only O₂ Both O₂ and CO₂ All of these Both O₂ and CO Only O₂ Both O₂ and CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal containing large quantity of __________ are difficult to wash. Ash Volatile matter Free impurities Inherent mineral matter Ash Volatile matter Free impurities Inherent mineral matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal. Gasification None of these Carbonisation Hydrogenation Gasification None of these Carbonisation Hydrogenation ANSWER DOWNLOAD EXAMIANS APP
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