Engine Operation Principles Quiz

What is the term commonly used today for the engine cycle designed by Nikolas Otto?

• 4-stroke cycle

• 2-stroke cycle

• HV cycle

• Diesel cycle

Explain why the 4-stroke cycle is important in the operation of most petrol and diesel engines.

• It allows for efficient fuel combustion and power generation.

• It reduces the size of the engine.

• It increases the weight of the engine.

• It eliminates the need for fuel.

Which component opens the valves in an engine?

• Crankshaft

• Camshaft

• Timing belt

• Valve springs

Explain the importance of timing between the crankshaft and camshaft in an internal combustion engine. What could happen if they are not properly timed?

• The engine will run more quietly

• The valves may open and close at incorrect times, causing poor engine performance or damage

• The engine will use less fuel

• The timing belt will last longer

During one 4-stroke cycle, how many times does the camshaft turn?

• The camshaft turns once (360 degrees).

• The camshaft turns twice (720 degrees).

• The camshaft turns three times (1080 degrees).

• The camshaft does not turn.

How many strokes does a piston complete for one full cycle?

• 2 strokes

• 3 strokes

• 4 strokes

• 6 strokes

During one full cycle, how many power strokes are produced?

• 2 power strokes

• 1 power stroke

• 3 power strokes

• 4 power strokes

What is meant by the swept volume in an engine?

• The total volume of the engine block

• The amount of fuel/air that can fill the cylinder

• The volume of the exhaust gases

• The space above the piston at top dead center

Which formula is used to calculate the swept volume of a cylinder?

• π r² x stroke

• 2π r x height

• π d x stroke

• r² x height

In the formula π r² x stroke, what does "r" stand for?

• The radius of the cylinder

• The stroke length

• The diameter of the cylinder

• The volume of the cylinder