All Possible Stuff Flashcards
RAM random access memory is a notepad. Describe it
Information or values from input sensors can be retrieved from and entered into ram. CPU uses ram when performing calculations. Ram is volatile. Whenever power is lost or disconnected the information in ram is lost
The process of converting an analog signal to a digital signal is referred to as what
Encoding
A protocol is a common language for data communication between control modules. What are common protocols used in heavy duty vehicles
SAE J1587, J1708 and J1939
A linear type databus may have a resistor on either end. How many ohms would that resistor be.
120 0HMS
A throttle position sensor is also called TPS. A TPS is also a …..
Potentiometer
It has three wires. Reference voltage signal and ground. The higher the voltage the faster you go
If an ECM notices a signal voltage drop of 5 V DC in a temperature sensor circuit, What will the ECM do
The ECM will make the decision that an electrical open has occurred in the sensor circuit and create an active code indicating the sensor circuit voltage is high. It should be reading less than 5 V returning to ECM after it goes through the sensor
What type of connector would allow you to communicate with the ECM on highway and off road equipment
A DDL. Diagnostic data link
In an EUI pre-injection, the fuel injector Cam lobes starts to force the fuel injector plunger down and what three things are happening
The solenoid is de-energized, the poppet valve is open and fuel is forced out of the injector by the plunger into the fuel supply passage, not the nozzle tip
During EUI Injection The cam lobe continues to force the injector plunger downward and injection can begin at any time. During injection what four things are happening
The solenoid is energized, the poppet valve is closed, injection nozzle is open and fuel is injected into the cylinder
The open end of a wrist pin snap ring should point to the _____ of the piston.
Bottom
What are the common piston oversizes?
Imperial: .010 .020 .030
Metric: 0.25, 0.50, 0.75 mm
Diesel fuel is a hydrocarbon composed of 85% ____ and 15% ____.
85% carbon and 15% hydrogen
What does a diesel engine require for complete combustion?
Sufficient air, correct amount of fuel and sufficient heat for ignition.
Injector lines are made of what?
Heavy wall seamless steel tubing
On an inline injection pump, what are the injectors required to do?
Atomize and distribute the fuel in the cylinder
