SI Fuel

Open Ended

Why is understanding spark ignition fuel systems important for vehicle maintenance?

Multiple Choice

Which of the following is NOT one of the learning objectives for this lesson on Spark Ignition systems?

• To explain what 'Spark Ignition' means

• To identify 3 fuel system components used within a Spark ignition (SI) system

• To describe the process of diesel combustion

• To give an overview of how the whole fuel system functions in an SI engine

Open Ended

List two key health and safety considerations you should be aware of before working on fuel systems.

Multiple Select

Which of the following are fuel-related hazards you should be aware of when working with SI fuel systems?

• Fire and explosion risk

• Health hazards

• Environmental contamination

• Electrical shock

Fill in the Blank

The two key components shown in the petrol fuel system are the ___ and the fuel pump.

Open Ended

Explain how fuel moves from the tank to the engine in a petrol fuel system, referring to the diagram.

Multiple Choice

Based on the diagram, what is the function of the component connected to the fuel tank?

• To ignite the fuel

• To pump fuel to the engine

• To filter the air

• To cool the engine

Multiple Choice

Why do fuel tanks contain baffles, and what problems do they help prevent during vehicle operation?

• To prevent fuel sloshing and ensure fuel remains around the pick-up pipe

• To increase the fuel tank's capacity

• To make the tank lighter

• To improve the appearance of the tank

Multiple Choice

Which component on the engine layout diagram is the fuel tank?

• Blue

• Pink

• Yellow

• Green

Open Ended

Explain how the material used for fuel tanks has evolved over time and why modern tanks use high-density polyethylene.

Open Ended

On light vehicles, where are fuel tanks typically positioned and why is this placement important for safety and maintenance?

Fill in the Blank

Fuel tanks are vented to prevent pressure build-up during fuel expansion and contraction. Proper venting ensures safety by reducing the risk of ___ and explosions.

Multiple Choice

What component is used to pump petrol from the tank to the engine in modern cars, and how does it differ from older cars?

• Electric fuel pump; older cars used mechanical pumps

• Mechanical fuel pump; older cars used electric pumps

• Gravity feed; older cars used siphon pumps

• Manual pump; older cars used electric pumps

Multiple Select

Select all statements that are true about electronic fuel pumps.

• They operate using electric motors.

• They are commonly used in older vehicles.

• They optimize fuel flow based on engine requirements.

• They pull fuel from the tank to the engine.

Multiple Choice

What is the main difference between mechanical and electric fuel pumps in terms of how they operate and the type of vehicles they are commonly used in?

• Mechanical pumps use engine timing and are found in older vehicles; electric pumps use motors and are found in modern vehicles.

• Mechanical pumps use electric motors and are found in modern vehicles; electric pumps use engine timing and are found in older vehicles.

• Both types use engine timing and are found in all vehicles.

• Mechanical pumps are more efficient than electric pumps.

Fill in the Blank

A filter uses a paper element to stop ___ passing through the lines.

Open Ended

Explain how fuel filters contribute to engine performance and longevity.

Multiple Choice

Which of the following components is responsible for injecting fuel into the air intake tract of the engine?

• Fuel pump

• Fuel filter

• Fuel injector

• Carburetor

Open Ended

Describe the role of the fuel injector in the fuel delivery system and how it improves engine efficiency.

Fill in the Blank

Before reaching the injectors, the fuel is pumped from the tank through the filter and fuel lines into a hollow tube which links all the injectors together. This component is called the ___.

Open Ended

Explain the role of the fuel rail and fuel injectors in maintaining proper fuel delivery and pressure within an engine system.

Multiple Choice

Which component on the engine layout diagram is responsible for regulating the fuel pressure and returning excess fuel to the tank?

• Fuel injector

• Fuel rail

• Fuel pressure regulator

• ECU

Multiple Select

Which of the following statements about the fuel pressure regulator are correct?

• It sits on the fuel rail.

• It ensures fuel pressure stays constant.

• It controls the timing of the injectors.

• It funnels excess fuel back to the tank.

Multiple Choice

What is the primary function of the ECU in a modern fuel system?

• Regulate fuel pressure

• Control electronic components

• Store fuel

• Pump fuel

Fill in the Blank

An ECU receives information from different ___ to control the fuel pump, injectors, and spark plugs.

Open Ended

After learning about engine cooling and heat transfer, what questions do you still have or what would you like to learn more about in vehicle maintenance?

Multiple Choice

What are the three types of heat transfer involved in engine cooling systems?

• Conduction, convection, and radiation

• Evaporation, condensation, and precipitation

• Absorption, reflection, and transmission

• Expansion, compression, and diffusion