Quiz on Combustion Chambers and Turbines

What is a characteristic of a can-type combustor?

• It operates at a uniform pressure.

• It has a single flame tube.

• Each can has its own fuel injector.

• It is used exclusively in turbojet engines.

Which type of combustion chamber is known for its effective use of limited space?

• Radial turbine

• Can-annular type combustor

• Annular type combustor

• Can-type combustor

What is the primary function of the primary zone in the combustion process?

• To introduce secondary air.

• To ignite the flame and achieve complete combustion.

• To stabilize the flame.

• To cool the combustion gases.

What is a major factor affecting combustion chamber design?

• The color of the combustion chamber.

• The type of fuel used.

• The temperature level of gases after combustion.

• The size of the combustion chamber.

What is the purpose of flame holders in jet engines?

• To increase fuel efficiency.

• To maintain continual combustion.

• To reduce emissions.

• To enhance thrust.

Which of the following is a disadvantage of using airblast atomizers?

• Low fuel consumption.

• Good mechanical reliability.

• Narrow stability limits.

• High atomization quality.

What is the effect of increasing air velocity on combustion stability limits?

• It widens the stability limits.

• It narrows the stability limits.

• It has no effect on stability limits.

• It increases combustion efficiency.

What is the primary pollutant of concern from gas turbine emissions?

• Carbon dioxide (CO2)

• Sulfur dioxide (SO2)

• Unburned hydrocarbons (UHC)

• Oxides of nitrogen (NOx)

What is the main advantage of using dual-orifice atomizers?

• They are less complex.

• They are cheaper to manufacture.

• They provide good atomization over a wide range of fuel flows.

• They require less maintenance.

What is the role of flame tube cooling in gas turbines?

• To enhance fuel injection.

• To maintain the tube wall at a safe temperature.

• To reduce the size of the combustion chamber.

• To increase the combustion temperature.