class 2 question

i heard that class 2 covers 2,3,4 trucks and stuff, can someone clear this up for me pls
so if i get a class 2, id be able to drive dump trucks and stuff, or the same trucks i can drive on a class 3,4?
so would my licsence be a class 2 or 2,3,4?
yu

 

ya so to answer, yes i live in Alberta, by stuff i meant dump/cement trucks, things of that nature, and i already have the Q endorsement on my class 5, im currently taking my class 3 course, im pretty much bob tailing it around town
the thing is the government is currently paying for 20hrs of class 3 training then its out of my pockets if i need more, and i will.
so what i was thinking is finishing my 20hrs of class 3 training, then doing my class 2, the class 2 will give me more options it seems if it covers everything a class 3 does plus busses.
class 2 exam is easy, its in an automatic bus, i can drive both but class 2 is in general much easier to get.
so thats my thinking, getting class 2 that way i can do what i want in terms of work, bus or any class 3 vehicle.
but in terms of the license, would it be a straight class 2, or 2,3,4?
if i have a class 2 and at some point i want to haul gravel in a dump truck, will it be an issue with a class 2 or would it be fine?

not sure if im making sense lol, but i hope i am