Which of the following takes place in the combustion chamber of a gas turbine engine?

a. gaseous combustion products are cooled to a desired temperature.
b. fuel oil is mixed with a proper portion of compressed air.
c. fuel oil is stored with sufficient pressure.
d. a glow plug is used to add enough heat to the chamber for combustion to occur.

The correct option is B.
A gas turbine engine is an internal combustion engine in which the combustion of a fuel occur in a section called combustion chamber. The working fluid in gas turbine is air. Fresh air enter the engine through the compressor; the fresh air and the injected fuel meet at the combustion chamber where the fuel oil is mixed with the appropriate amount of compressed air, thus producing heat [thermal energy]. The thermal energy is used to perform mechanical work in the engine. The exhaust gas will be pass out of the engine via turbine.

Answer:

the word that best describes martin luther king jr.'s tone in the video is dignified

explanation:

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer