(ii) and (iii)
only (iii)
(i) and (ii)
only (i)

Design of Steel Structure Lug angles

are used to reduce the length of connection.
increases shear lag.
All listed here
are unequal angles.

Design of Steel Structure In case of timber structures, the simple bending formula M = fz may be applied for

rectangular beams up to 300 mm depth
solid circular beams only
all rectangular beams
all square cross-section beams

Design of Steel Structure When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)

gives the maximum angle between the two forces Fa and Fm
is at the maximum distance from CG of the rivet group
gives the minimum angle between the two forces Fa and Fm
is at the minimum distance from CG of the rivet group

Design of Steel Structure Other conditions being same, the load factor in indeterminate structures is

More than the load factor in determinate structures
Equal to load factor in determinate structures
Less than the load factor in determinate structures
Unpredictable

Design of Steel Structure The bracing provided in the plane of end posts is called

sway bracing
bottom lateral bracing
top lateral bracing
portal bracing