Lesson 2 - Piston Engine Principles

Question 1

The four stroke cycle strokes are?

Answer 1

1) Induction (Suck)
2) Compression (Squeeze)
3) Power (Bang)
4) Exhaust (Blow)

Question 2

The term stroke refers to

Answer 2

The distance the piston travels between TDC and BDC.

Question 3

To move the piston through one stroke the crankshaft must rotate

Answer 3

180’

Question 4

How many degrees must the crankshaft turn in a four stroke full cycle?

Answer 4

720’

Question 5

Why does the four stroke engine have two spark plugs per head?

Answer 5

Efficiency and Redundancy