na.dongco121-150

Which statement is true regarding the air passing through the combustion section of a jet engine?

• A Most is used for engine cooling

• B Most is used to support combustion

• C A small percentage is frequently bled off at this point to be used for air-conditioning and/or other

• D Only a few amount is used for cooling

How are combustion liner walls cooled in a gas turbine engine

• A By secondary air flowing through the combustion chamber

• B By bleed air vented from the engine air inlet

• C By the pattern of holes and louvers cut in the diffuser section

• D By ram air

The approximate percentage of the mass airflow which bypasses the flame tube snout is

• A ~10%

• B ~80%

• C ~20%

• D ~50%

The approximate percentage of the mass airflow which is used for combustion

• A ~10%

• B ~80%

• C ~20%

• D ~50%

Which type of combustion chamber is the most commonly used on modern gas turbine engines

• A Can

• B Can-annular

• C Annular

• D All are correct

How to check the condition of combustion chamber

• A Using software

• B Using temperature sensor

• C Using pressure sensor

• D By boroscope inspection

Can a combustion chamber be replaced with engine on-wing?

• A Yes

• B No, in engine shop only

• C Yes, if there is no rain and dust

• D All are correct

What are the two main basic components of the turbine section in a gas turbine engine?

• A Stator and rotor

• B Hot and cold

• C Impeller and diffuser

• D Blade and housing

The turbine section

• A Increases air velocity to create thrust

• B Uses heat energy to expand and accelerate the gas flow

• C Drives the compressor section

• D Produces the jet stream

What is the major function of the turbine assembly in a turbojet engine

• A Directs the gases in the proper direction to the tailpipe

• B Supplies the power to turn the compressor

• C Increases the temperature of the exhaust gases

• D Produces the jet stream