Steam and Gas Turbines MCQs on “The Combustor”.
1. Combustor is also called as _________
a) combustion
b) ramjet
c) inlet manifold
d) none of the mentioned
Answer: a
Clarification: Combustor is also called as a ramjet. Inlet manifold is the inlet pipe provided for adding materials.
2. Combustor can also be called as __________
a) burner
b) ramjet
c) inlet manifold
d) none of the mentioned
Answer: b
Clarification: Combustor can be called as ramjet or burner.
3. Pressure inside the combustor is ________
a) Constant
b) Increases
c) Decreases
d) None of the mentioned
Answer: a
Clarification: Pressure inside the combustor is constant.
4. In _________ air is directly fed to the nozzle.
a) burner & ramjet
b) burner
c) ramjet
d) none of the mentioned
Answer: c
Clarification: In ramjet air is directly fed to the nozzle. Ramjet or burner both mean the same.
5. Flow rates are ________ in combustor.
a) high
b) low
c) medium
d) none of the mentioned
Answer: a
Clarification: Flow rates are high in the combustors. As pressure is high flow rate is also high in the combustor.
6. When 1 kg of jet fuel is produced _______ amount of co2 is released.
a) 3kg
b) 3.2kg
c) 3.4kg
d) 3.8kg
Answer: b
Clarification: When 1 kg of jet fuel is burned 3.2 kgs of co2 is released.
7. Fuel that was not completely burnt is called as _______
a) Ramjets
b) UHC
c) Emissions
d) None of the mentioned
Answer: b
Clarification: Incompletely combusted fuels are called as UHC.
8. UHC’s are produced at _________ power levels.
a) high
b) medium
c) low
d) none of the mentioned
Answer: c
Clarification: UHC’s are generally produced at low power levels.
9. Combustors which doesn’t produce more CO doesn’t emit much UHC.
a) True
b) False
Answer: a
Clarification: Combustors that have highly optimized UHC are the combustors which produce low CO emissions.
10. CO produced in combustion is eliminated by __________
a) reduction
b) oxidation
c) reduction & oxidation
d) none of the mentioned
Answer: b
Clarification: CO produced in combustion is eliminated by oxidation.