Engineering :: Fuels and Combustion

1.  Combustion reaction is
A. an endothermic reaction B. an exothermic reaction
C. an autocatalytic reaction D. a photochemical reaction

2.  Combustion requires
A. a supply of oxygen B. a combustible fuel
C. a source of heat energy D. all of the above

3.  The combustion process is usually accompanied by
A. rise in temperature and fall in pressure B. rise in temperature and pressure
C. fall in temperature and pressure D. fall in temperature and rise in pressure

4.  The temperature to which a substance must be heated before it may burn is called
A. flash point B. critical temperature
C. transition temperature D. ignifion temperature

5.  If the oxygen is entirely removed from a fire by smothering it with foram the combustion will
A. slow down B. stop entirely
C. speed up D. not be affected at all

6.  A fire can be put out by
A. cutting off the supply of combustible fuel B. smothering the fire
C. cooling the fire D. all of the above

7.  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

8.  A fuel is a substance which
A. burns on heating B. produces smoke
C. burns to produce energy D. undergoes oxidation on heating

9.  Fuels produce energy because
A. their oxidation reactions are endothermic B. they produce large volumes of gases
C. their oxidation processes are exothermic D. none of the above

10.  A fuel can be defined as any combustible matter that is used to produce heat. So the fuels may be
A. solids B. gases
C. liquids D. all of the above

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