Diesel Engine Systems Test Review

Diesel engines rely on:

• Spark ignition

• Compression ignition

• Electric ignition

• External combustion

What component is responsible for compressing air in the cylinder?

• Fuel injector

• Turbocharger

• Piston

• Camshaft

Which stroke in the four-stroke cycle is when fuel is injected?

• Intake

• Compression

• Power

• Exhaust

Which of the following is a function of the intake valve?

• Expel gases

• Start ignition

• Allow air in

• Mix fuel and air

Diesel fuel is injected at:

• Top dead center

• Bottom dead center

• During intake

• After the power stroke

Which of the following is typically used for the engine block?

• Aluminum

• Plastic

• Cast iron

• Copper

What does TDC stand for?

• Timing diesel compression

• Top diesel cycle

• Top dead center

• Turbo diesel cycle

In the four-stroke cycle, how many crankshaft revolutions complete one cycle?

• One

• Two

• Three

• Four

What determines engine displacement?

• Air intake

• Cylinder bore and stroke

• Fuel type

• Engine speed

What is the typical compression ratio range for a diesel engine?

• 16:1-20:1

• 10:1–12:1

• 14:1–18:1

• 5:1–7:1