Butane is flammable in concentrations from
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.1.6 to 8.5 %
D.3.2 to 12.5 %
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.1.6 to 8.5 %
D.3.2 to 12.5 %
A.2CO2 ? 2CO + O2
B.2CO + O2 ? 2CO2 + energy
C.CH4 + 2O2 ? CO2 + 2H2O
D.C2H4 + 3O2 ? 2CO2 + 2H2O
A.2.0 cu. Ft.
B.3.0 cu. Ft.
C.7.5 cu. Ft.
D.9.52 cu. Ft.
A.the maximum fuel consumption for the given requirement
B.the high percentages of O2 in the flue gas
C.the high stack temperature
D.the most efficient furnance operation and the minimum fuel consumption for the given heating requirement
A.fast and high temperature oxidation
B.slow and low temperature oxidation
C.slow and high temperature oxidation
D.fast and low temperature oxidation
A.1000 to 2000?F
B.2000 to 2500?F
C.2700 to 3000?F
D.3400 to 3800?F
A.CO2
B.air
C.SO2
D.H2O
A.methane
B.ethane
C.propane
D.butane
A.its percentage fixed carbon to that of ash
B.its percentage fixed carbon to that of volatile matter
C.its percentage fixed carbon to that of moisture
D.percentage carbon to that of hydrogen obtained in the ultimate analysis of coal.
A.1/2 litre
B.1 litre
C.2 litres
D.4 litres