Fuels and Combustion
Pick out the wrong statement.

Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing
Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal
None of these
Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Lack of thorough mixing of fuel with air
High sulphur content in the fuel
Low calorific value of the fuel
Presence of large quantity of hydrogen in the fuel

ANSWER DOWNLOAD EXAMIANS APP