Engineering :: Fuels and Combustion
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1. |
Combustion reaction is |
A. |
an endothermic reaction |
B. |
an exothermic reaction |
C. |
an autocatalytic reaction |
D. |
a photochemical reaction |
Answer: Option B
Explanation:
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2. |
Combustion requires |
A. |
a supply of oxygen |
B. |
a combustible fuel |
C. |
a source of heat energy |
D. |
all of the above |
Answer: Option D
Explanation:
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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 |
Answer: Option B
Explanation:
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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 |
Answer: Option D
Explanation:
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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 |
Answer: Option B
Explanation:
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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 |
Answer: Option D
Explanation:
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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 |
Answer: Option C
Explanation:
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8. |
A fuel is a substance which |
A. |
burns on heating |
B. |
produces smoke |
C. |
burns to produce energy |
D. |
undergoes oxidation on heating |
Answer: Option C
Explanation:
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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 |
Answer: Option C
Explanation:
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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 |
Answer: Option D
Explanation:
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