Structural questions
Any structural engineers around. Currently taking some local Engineering papers and there's some questions which I can't really get the answers.
1) What is the maximum countersinking depth to material thickness ratio?
a) 1/3
b) 2/3
3) 3/4
2) A cantilever beam
a) no bending stress at the wing tip
b) moderate bending stress at wing tip
c) greatest bending stress at the wing tip
3) What is the main advantage of machine structures over riveted structures? a) saving in weight
b) reduce in notching effect
c) reduce in corrosion at joint
4) Bending stress of the beam
a) parallel to the axis of the beam
b) perpendicular to the axis of the beam
c) longitudinal to the axis of the beam
5) Alternate repair method to prevent knife edge to occur
a) dimpling
b) bonding
Any ideas guys?