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WorksheetsAUT108 Week 4 Quiz Fuel Injection
Total questions: 20
Worksheet time: 11mins
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
All of the following are valid ways to relieve the static pressure in the fuel system before removing the fuel lines EXCEPT:
Select one:
removing the fuel pump relay or the fuel pump fuse and running the engine until it dies.
connecting a fuel pump pressure gauge (that has a bleed valve) to the fuel rail test point, and releasing the excess pressure from the system into a gas can.
on GDI equipped engines, using a scan tool to release the fuel pressure.
using fuel filter lines.
Tech A says that electric fuel pump pressure can often be tested by accessing a test port. Tech B says that electric fuel pump volume can be affected by the condition of the fuel injectors. Who is correct?
Select one:
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
The pressure between the pump and the injectors can be maintained by _________.
Select one:
Varying the speed of the pump
Input from the driver
Both A and B
None of the above
Tech A says that fuel injectors can be checked for the specified amount of resistance. Tech B says that an injector pressure drop test can determine if an injector is restricted with deposits. Who is correct?
Select one:
Tech A
Tech B
Both A and B
Neither A nor B
What tool is shown here?
Vacuum gauge
Compression gauge
Fuel pressure gauge
Cylinder power balance tester
What parts are shown here?
EGR valves & rail
Fuel rail & injectors
COP Ignition coils & rail
Sparkplugs & rail
What part is this?
Carburetor
TBI Injection system
Fly by wire Throttle Body
Throttle Body
Tech A says that PFI fuel injectors need about 46 to 65 psi of fuel pressure to make them operate. Tech B says that the GDI fuel injectors will require upwards of 2000 psi.
Tech A
Tech B
Both Tech A & Tech B
Neither Tech A or Tech B
What type of fuel injection system is shown?
TBI
PFI
GDI
SFI
Match the following:
Sparkplug
Ignites the fuel mixture in the cylinder
Ignition coil
Supplies the secondary voltage needed to fire a sparkplug
Ignition module or PCM
Determines when to send the signal to the ignition coil(s)
COI Ignition system
The most common ignition system used on todays cars
Breaker point ignition
Mechanical ignition system
