Hi Thibau
These are odd looking questions. Are they from the CQB?
Q1 Mechanical stops. The flight fine pitch stop can be varied to prevent a sudden massive selection of fully fine, and can be withdrawn to allow the prop to go to ground fine and reverse pitch
Q2 What do they mean by "mechanical load" and "propeller"? The accepted statement is that bending twisting and thrust forces put maximum stress on the blade root and the blade hub attachment point
Q3 Cambered blade sections can absorb more engine power - they are high lift/high drag sections. I don't see that a change in camber only would affect ATM or CTM
Q4 The electric feathering pump is there to ensure feathering if engine oil pressure is lost
Q5 It's a convention. A right hand tractor propeller has the top blade moving to the right when seen from the pilots seat, ie, clockwise when seen from behind
Do the hands of a clock go round clockwise or anticlockwise? Answer, normally clockwise, but not when seen from the clock
Dick