Engine Fundamentals Quiz

What is the primary purpose of an engine?

• Convert mechanical energy to heat energy

• Propel the vehicle and generate electrical power

• Control the vehicle's speed

• Store electrical energy

What are the four strokes of a four-stroke cycle engine?

• Intake, compression, power, exhaust

• Power, compression, injection, exhaust

• Intake, expansion, injection, power

• Exhaust, compression, cooling, power

Which engine component contains the valves that allow air and fuel into the cylinder?

• Crankshaft

• Cylinder head

• Oil pan

• Piston

What does the cooling system primarily control in an engine?

• Combustion efficiency

• Lubrication

• Engine temperatures

• Compression ratio

(Refer to Figure 18.1) Identify the components of the rotating assembly.

• Crankshaft, camshaft, pistons

• Crankshaft, connecting rods, pistons

• Cylinder head, intake valve, exhaust valve

• Oil pan, pistons, valve springs

(Refer to Figure 18.5) Label the strokes shown in the diagram.

• Power, compression, intake, exhaust

• Intake, compression, power, exhaust

• Compression, power, exhaust, intake

• Exhaust, power, compression, intake

The compression ratio is determined by the difference in cylinder volume at top dead center and bottom dead center.

• True

• False

A naturally aspirated engine loses 3% of its power for every 1000 feet increase in altitude.

• True

• False

The _______ system provides the spark required for ignition in the engine.

• Ignition

• Cooling

• Exhaust

• Fuel

The engine's _______ converts heat energy into mechanical energy.

• Crankshaft

• Cylinder head

• Block

• Internal combustion process