1) The Wright Brothers are remembered for their first flight .They were first with ?

a)A controlled flight with a heavier than air vehicle

b) A heavier than air vehicle flying with engine power

c) A controlled and powered flight with a heavier than air vehicle

d) A powered and controlled flight of an vehicle

Airfoil nomenclature

2) you are given four statements about the NACA airfoil with code XYZZ?

a) The X stands for the camber as percentage of the wing chord length

b) The Y indicates the thickness of the airfoil

c) When ZZ is 00,then the NACA -code is non-realistic

d) when XY is 00,then the airfoil is a symmetric airfoil

Lift drag polar

3)what is a lift drag polar

a) the curve showing the lift coefficient as function of the drag coefficient

b) the curve that indicates the lift and drag coefficient as function of the the angle of attack

c) the curve that describes the lift and drag force as function of the angle of attack

Beam

4) which of the following about beam is false

d) none of the previous three alternatives a,b,or c is correct