air present in atmosphere at NTP conditions

air required for complete combustion of fuel with no excess air

air required for optimum combustion so as to have reasonable excess air

air required to convert CO into C02

0.2

0.8

1

0.6

throttling calorimeter

separating calorimeter

combined separating and throttling calorimeter

bucket calorimeter

xx * x2

xx + x2

xx-x2

None of these

0.1

0.3

0.5

0.8