A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and
the resulting flue gas contains 21% CO2
. It means that
(A) 21% excess air has been used for combustion
(B) 21% excess oxygen has been used for combustion
(C) Complete combustion of fuel has taken place
(D) No excess air has been used for combustion
the resulting flue gas contains 21% CO2
. It means that
(A) 21% excess air has been used for combustion
(B) 21% excess oxygen has been used for combustion
(C) Complete combustion of fuel has taken place
(D) No excess air has been used for combustion