Fuel Injectors Quiz

What is the ideal fuel to air ratio for complete combustion?

• 20 to 1

• 16 to 1

• 14.7 to 1

• 12 to 1

What are the three types of fuel injections likely to be seen on modern cars?

• Port, indirect, and spray guided

• Port, direct, and indirect

• Wall guided, spray guided, and swirl cavity

• Port, direct, and wall guided

What is the main advantage of direct injection over port and indirect injection?

• Higher pressure in the cylinders

• No carbon buildup

• Lower production cost

• Better fuel efficiency

What is the main downside of indirect injection in diesel engines?

• The need for glow plugs to start the engine

• Carbon buildup in the cylinders

• Higher production cost

• Inefficient fuel delivery

What is the purpose of the fuel rail in a fuel injection system?

• To mix fuel with air before delivery to the cylinder

• To house the fuel injectors

• To filter the fuel before it enters the injector

• To regulate the pressure from the fuel pump

What is the function of the electromagnetic coil in a fuel injector?

• To mix fuel with air before delivery to the cylinder

• To create a vortex of air

• To regulate the timing of the intake valves

• To open the pintle injector

What is the role of the fuel pump in a fuel injection system?

• To mix fuel with air before delivery to the cylinder

• To create a vortex of air

• To deliver fuel to the fuel rail

• To open the pintle injector

What is the disadvantage of direct injection in gasoline engines?

• Carbon buildup in the intake valves

• Higher production cost

• Lower fuel efficiency

• The need for glow plugs to start the engine

What is the function of the throttle body in a fuel injection system?

• To regulate the amount of air entering the engine

• To mix fuel with air before delivery to the cylinder

• To filter the fuel before it enters the injector

• To house the fuel injectors

What is the role of the pressure regulator in a fuel injection system?

• To regulate the amount of air entering the engine

• To regulate the pressure of fuel in the fuel rail

• To mix fuel with air before delivery to the cylinder

• To filter the fuel before it enters the injector