Question

the diagrams show the four primary steps in the production of work in a four - stroke heat engine. what is the correct order in which these steps occur? y w, x, z x, z, w, y w, x, y, z z, x, y, w

Explanation:

Step1: Identify intake stroke

W shows the intake of fuel - air mixture, which is the first step.

Step2: Identify compression stroke

X shows the piston moving up to compress the fuel - air mixture, the second step.

Step3: Identify power stroke

Y shows the ignition and expansion of the fuel - air mixture, the third step.

Step4: Identify exhaust stroke

Z shows the expulsion of exhaust gases, the fourth step.

Answer:

C. W, X, Y, Z