Drilling, Turning And Milling

Question 1

Features of drilling

Answer 1

Blind holes can be made (that don’t come out the bottom)
Through holes can be made (that do come out the bottom)
You can use a countersink drill bit to make recesses for flush fitting countersunk screw heads
You can use a counterbore drill bit to make recesses for flush fitting round bolt heads
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For these you’d need a pilot hole first though!

Question 2

Features of turning

Answer 2

Uses a lathe
Types:

Facing-for making smooth ends
Parallel turning- reduces diameter of work piece
Taper turning- wide to small gradually
Knurling- applies a texture 
All to "round work pieces"

Question 3

Features of milling

Answer 3

Slot drill milling plunges into a component to machine slots across
An end mill can machine the side of a work piece to be smooth and square across a component
An end mill can also machine the face of a work piece to be smooth and square across a component