250+ TOP MCQs on Fuel Injection, Atomization and Combustion Chamber and Answers

Steam and Gas Turbines Multiple Choice Questions on “Fuel Injection, Atomization and Combustion Chamber”.

1. Nozzles are also a part of gas turbine _________
a) combustor
b) compressor
c) fuel injection
d) none of the mentioned
Answer: c
Clarification: In gas turbine fuel injection nozzles are used for atomization.

2. ___________ are present in gas turbine fuel injectors.
a) Vaporizers
b) Recuperators
c) Nozzles
d) None of the mentioned
Answer: a
Clarification: Vaporizers are also a part of fuel injectors.

3. ____________ are also a part of gas turbine fuel injectors.
a) Swirlers
b) Nozzles
c) Recuperators
d) None of the mentioned
Answer: b
Clarification: Swirlers present in gas turbine fuel injectors turns the movement of gas inside the injector to swirling motion so that combustion efficiency is high. Nozzles are used to inject fuel.

4. Afterburner spray bars are present in gas turbine fuel injectors.
a) True
b) False
Answer: a
Clarification: Afterburner spray bars are present in fuel injectors.

5. When fuel injectors efficiency is optimized then overall efficiency of gas turbines is __________
a) remains constant
b) decreased
c) increased
d) none of the mentioned
Answer: c
Clarification: When fuel injectors efficiency is optimized then overall efficiency of gas turbines is increased.

6. __________ of engines are determined from fuel injectors.
a) Efficiency
b) Emissions
c) Efficiency & Emissions
d) None of the mentioned
Answer: c
Clarification: Fuel injectors also plays a major role in defining emissions. Working of fuel injectors determines both emissions and efficiency.

7. Lean mixtures give _________ efficiency.
a) optimal
b) higher
c) lower
d) none of the mentioned
Answer: a
Clarification: Lean mixture give optimal efficiency.

8. In low fuel combustion lean mixture have _______ efficiency.
a) high
b) low
c) medium
d) none of the mentioned
Answer: b
Clarification: In low fuel combustion lean mixture have low efficiency.

9. Fuel droplet size effects the _________
a) combustion
b) effects
c) combustion & effects
d) none of the mentioned
Answer: a
Clarification: When fuel droplet size is minimized combustion is maximized. Combustion directly effects the efficiency of the gas turbine.

10. Airflow controls the rate of combustion.
a) True
b) False
Answer: a
Clarification: Airflow determines the mixture of fuel which controls the rate of combustion.