A reading of 100% on the explosivementer means that the concentration of combustible gas is
A.less than the lower limit of explosibility
B.equal to the lower limit of explosibility
C.higher than the lower limit of explosibility
D.both (b) and (c)
A.less than the lower limit of explosibility
B.equal to the lower limit of explosibility
C.higher than the lower limit of explosibility
D.both (b) and (c)
A.when a fuel is burned in air
B.when a fuel is burned in oxygen
C.when a fuel is burned in air or oxygen
D.when a fuel is burned in air or oxygen without gain or loss of heat
A.fuel is being wasted by incomplete combustion
B.the combustion is proceeding effieiently
C.the dry-gas loss is too great
D.the dry-gas loss is negligible
A.the moisture content of the fuel
B.the humidity of air used for combustion
C.the moisture content of the fuel and the jumidity of air used for combustion
D.the water formed by combustion reaction
A.13%
B.above 14%
C.10%
D.6%
A.burns on heating
B.produces smoke
C.burns to produce energy
D.undergoes oxidation on heating
A.paraffins
B.naphthenes
C.olefins
D.aromatics
A.carbon hydrogen and ash
B.volatile matter moisture ash and fixed carbon
C.carbon hydrogen sulphur and nitrogen
D.volatilematter mositure nitrogen and fixed carbon
A.decreases with decrease in C/H ratio of a fuel
B.decreases with increase in C/H ratio of fuel
C.is independent of C/H ration of a fuel
D.decreases with decrease in excess air
A.1.5 times
B.1 time
C.20 times
D.50 times