I&S Petrol Fuel System

What is the role of the venturi action in a carburettor?

• To freeze the fuel.

• To atomise the fuel.

• To solidify the fuel.

• To evaporate the fuel.

What is the main focus of engine management systems?

• To increase the size of the engine.

• To control emissions and comply with regulations.

• To change the color of the engine.

• To make the engine heavier.

What is the ideal air to fuel ratio for a petrol engine by mass?

• 15:1

• 14.7:1

• 16:1

• 13.5:1

What can a blocked filter in the fuel system cause?

• A shortage of fuel at the carburettor

• An increase in speed

• A decrease in air pressure

• A louder engine noise

What connects the fuel pump to the carburettor?

• Fuel lines

• Air filters

• Exhaust pipes

• Radiator hoses

What is shown in Figure 31.3?

• Basic fuel system with a carburettor

• Advanced engine system

• Cooling system

• Electrical system

What is the function of the air cleaner in the fuel system?

• To clean the air entering the engine

• To filter the fuel

• To cool the engine

• To increase speed

What is shown in Figure 31.4?

• Schematic fuel system showing the fuel lines

• Electrical wiring diagram

• Cooling system layout

• Brake system diagram

What does the mechanical fuel pump have that moves up and down?

• A flexible diaphragm

• A rigid plate

• A metal rod

• A plastic tube

What does the fuel pump operation help prevent?

• Overheating

• Vapour locks

• Oil leaks

• Air bubbles