H/C ratio (by weight) is zero for
A.carbon
B.hydrogen
C.methane
D.Gobar gas
A.carbon
B.hydrogen
C.methane
D.Gobar gas
A.flash point
B.critical temperature
C.transition temperature
D.ignifion temperature
A.presence of high percentage of carbon monoxide in the flue-gas
B.a smoky stack
C.increased fuel consumption for the same heating requirement
D.all these answers
A.no combustion
B.continuous combustion
C.no momentary flash
A.solid fuels
B.liquid fuels
C.gaseous fuels
A.yields carbon dioxide and water vapour
B.takes place due to too much air
C.takes place due to an insufficient amount of air
D.yields hydrogen and carbon dioxide
A.The amount of CO2 formed decreases for the same % of excess air
B.The amount of CO2 formed increases for the same % of excess air
C.the amount of energy liberated by the combustion decreasesfor the same % of excess air
D.the amount of CO2 formed remains constant for the same % of excess air.
A.cutting off the supply of combustible fuel
B.smothering the fire
C.cooling the fire
D.all of the above
A.a supply of oxygen
B.a combustible fuel
C.a source of heat energy
D.all of the above