Methane is flammable in concentrations from
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.3.2 to 12.5 %
D.1.6 to 8.5 %
Category: Fuels and Combustion Mcqs
Internal energy of the combustion products is
A.equal to that of reactants
B.greater than that of reactants
C.less than that of reactants
At the organic liquids are combustible except
A.benzene
B.carbon tetrachloride
C.toluene
D.cyclohexane
The most important instrument for complete flue-gas analysis is the Orsat gas analyzer. The Orsat analyzes flue gases by the process of
A.adsorption
B.distillation
C.evaporation
D.absorption
Which of the three types of fuels offer the highest heating values?
A.gaseous fuels
B.liquid fuels
C.solid fuels
Propane is flammable in concentrations from
A.4.1 to 74.2 %
B.2.1 to 9.4 %
C.3.2 to 12.5 %
D.5.3 to 14.0 %
If the explosivementer reading is zero it means that
A.there is just enough combustible gas in the air to cause an explosion
B.there is too little gas in the air to cause an explosion
C.the concentration of combustible gas lies between lower and upper limits of explosibility
D.the concentration of oxygen is zero
The ratio of the maximum adiabatic flame temperature in air to the maximum adiabatic temperature in pur oxygen is always
A.equal to one
B.much less than one
C.much greater than one
The hottest part of flame lies in its
A.blue zone
B.luminous zone
C.non-luminous zone
D.zone of unburnt gases
A paraffinic hydrocarbon liquid fuel has a C/H ration (by weight) of 5.1428. Its chemical formula is
A.C8H18
B.C7H16
C.C6H14
D.C2H12
