Petrol Fuel Injection Systems Quiz

How is the fuel delivery system controlled in modern vehicles?

• Manually

• Mechanically

• Electronically

• Hydraulically

What is the ideal air/fuel ratio for a petrol engine?

• 13.5:1

• 14.7:1

• 15.5:1

• 16.7:1

What does the ECU use to monitor engine conditions?

• Various sensors

• Fuel injectors

• Intake valves

• Manifold runners

Where is fuel stored until the intake valve opens?

• In each runner

• In the ECU

• In the throttle valve

• In the engine speed sensor

What is one benefit of electronic multipoint fuel injection systems?

• They produce very low emission levels.

• They are more expensive.

• They use more fuel.

• They are slower.

How does an electronic multipoint fuel injection system improve over a single point system?

• Each cylinder has a fuel injector.

• It uses one injector for all cylinders.

• It has no injectors.

• It uses less fuel.

What does the ECU maintain by monitoring input sensors and controlling actuators?

• Air-fuel ratio

• Temperature

• Speed

• Oil level

Where are the injectors located to spray fuel?

• At the exhaust valve

• At the intake valve

• At the fuel tank

• At the ignition system

What type of petrol mixture is harder to ignite?

• Rich mixture

• Lean mixture

• Medium mixture

• Balanced mixture

What is the air/fuel ratio for a rich mixture directed towards the spark plug?

• 5:1 to 8:1

• 10:1 to 14:1

• 15:1 to 18:1

• 20:1 to 25:1