Four stroke engine operation

What is the main job of a four-stroke engine?

• To create electrical energy

• To convert mechanical energy into chemical energy

• To convert chemical energy into mechanical energy

• To store chemical energy

What does the camshaft do in a four-stroke engine?

• It powers the wheels directly

• It cools the engine

• It opens and closes the intake and exhaust valves

• It stores fuel

How can the torque output of a single-cylinder engine be improved?

• By using less fuel

• By decreasing the engine size

• By adding more cylinders

• By reducing the number of cylinders

What is the firing order of a four-cylinder inline engine?

• One, two, three, four

• One, three, four, two

• Four, three, two, one

• Two, four, one, three

What does an engine's compression ratio indicate?

• The type of fuel used

• The speed of the engine

• The amount of air-fuel charge compressed

• The size of the engine