Question

During which stroke of a four-stroke internal combustion engine is chemical energy converted into heat and work?

A. Power stroke
B. Intake stroke
C. Exhaust stroke
D. Compression stroke

Answer 1

@Australopithecus A or B?

Answer 2

Let's look at your choices and it becomes easy to tell which is the answer:

Intake is when the fuel is brought into the chamber.
Compression is the fuel being compressed within the chamber by the piston
Power is the combustion of the fuel pushing the piston back up
Exhaust is the releasing of the gases from the chamber

Which of these provides some kind of force? Find that and you have your answer.

Answer 3

@Dragondd320 A?

Answer 4

Exactly :)

Answer 5

Thank you. Can you help me with a few more please? :)

Answer 6

I'll try my best