Steam and Gas Turbines Multiple Choice Questions on “Mechanics of Combustion”.
1. In combustion the _______________ is released from breaking the chemical bonds.
a) chemical energy
b) heat energy
c) kinetic energy
d) none of the mentioned
Answer: a
Clarification: When required heat energy is supplied chemical bonds break and release energy.
2. In combustion mechanism chain branching is represented by ______
a) g
b) f
c) a
d) t
Answer: b
Clarification: In combustion mechanism chain branching is represented by f.
3. In combustion mechanism chain termination is represented by ________
a) t
b) b
c) g
d) f
Answer: c
Clarification: In combustion mechanism chain termination is represented by g.
4. If g is _______ than f then termination exceeds branching.
a) greater
b) lesser
c) equal
d) none of the mentioned
Answer:a
Clarification: If g is greater than f then termination exceeds branching.
5. If f is ___________ than g then branching exceeds termination.
a) equal
b) lesser
c) greater
d) none of the mentioned
Answer: c
Clarification: If f is greater than g then branching exceeds termination.
6. Low oxygen pressures assures g _________ f.
a) lesser than
b) greater
c) equal to
d) none of the mentioned
Answer: b
Clarification: Low oxygen pressures assure g greater than f.
7. High oxygen pressure assure g ________ f.
a) lesser than
b) greater than
c) equal to
d) none of the mentioned
Answer: a
Clarification: High oxygen pressure assure g less than f.
8. Rate of combustion depends upon radial concentration.
a) True
b) False
Answer: a
Clarification: Rate of combustion depends upon radial concentration.
9. Hydrogen oxygen reaction depends upon ________
a) pressure concentration
b) temperature gradient
c) temperature
d) none of the mentioned
Answer: a
Clarification: Hydrogen oxygen reaction depends on pressure.
10. Hydrocarbon combustion is of __________
a) two
b) one
c) three
d) none of the mentioned
Answer: a
Clarification: Hydrocarbon combustion is of two types. They are hydro carbon breaking and oxidizing.