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.

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.