AUT108 Week 4 Quiz Fuel Injection

In GDI engines, which of the following is the least risky way to remove the carbon on intake valves and runners, especially if the buildup is very heavy?

Select one:

• Removing the cylinder head, disassembling it, and cleaning it

• Removing the intake manifold and using a crushed walnut shell blaster to blast away the carbon

• Removing the intake manifold and using a chemical cleaner to soften and dissolve the carbon so it can be removed

• Induction cleaning

Sequential injection means injection occurs in the sequence of the firing order.

Select one:

• True

• False

EFI systems employ electronically controlled injectors to spray the fuel into the ________.

Select one:

• Intake system

• Cylinder directly

• Either A or B

• None of the above

Tech A says that the more oxygen the engine uses means the engine is running a rich mixture. Tech B says that the less oxygen the engine uses means the engine is running a lean mixture. Who is correct?

Select one:

• Tech A

• Tech B

• Both Techs A and B

• Neither Tech A nor B

Which of the following is NOT one of the three basic EFI systems?

Select one:

• Throttle body injection (TBI)

• Multipoint fuel injection (MPFI)

• Computer-controlled carburetor injection

• Gasoline direct injection (GDI)

________ employ electronically controlled injectors to spray the fuel into either the intake manifold or the directly into the cylinder.

Select one:

• Carbureted systems

• EFI systems

• Fuel rails

• Metering jets

What part is this?

• Electric Fuel Pump

• Fuel Injector

• Fuel Pressure Regulator

• Crankshaft Sensor

Pre-ignition occurs before normal combustion, when something in the combustion chamber heats up enough to ignite the mixture before the spark plug fires.

Select one:

• True

• False

Electronic fuel injection (EFI) systems may be either a circulation-type system or a(n):

Select one:

• downdraft type.

• updraft type.

• endless type.

• returnless type.

Which of these fuel injection systems operates with fuel injectors located only in the intake manifold near each intake valve and sprays fuel toward the valve?

Select one:

• Central-point injection

• Throttle body injection

• Multipoint fuel injection

• Gasoline direct injection