Wave forms

So, all these are the forms of the waves we can find in a sensor? Independent of the use, (injectors, cam pos.). Is there another waveform?

And if I have a problem with fuel delivery for example, can I check the different sensors of the fuel system and see how waves are being shown through oscilloscope?

To what exactly are you referring?

There are a great many waveforms, for the most part what is of interest are what are called square wave functions, where the voltage switches between two values (almost) instantly.