$2-1.$ Circle the right answers from $($Q $1-5,5$ points$)$

$1-$ The number of independent equations to be satisfied for suilibrium of a plane structure is

a$)1$

b$)2$

c$)3$

d$)6$

$2.$ Which support type allows translation in one direction but restrains rotation and translation in the perpendicular direction?

A$.$ Pinned support

B$)$ Hinged support

B$.$ Roller support

D$)$ Fixed support

$3-$In moment distribution method, the sum of distribution factors of all the members meeting at any joint is always

a$)$ zero

b$)$ less than $1$

c$)1$

d$)$ greater than $1$

$4-$What is the primary function of a beam's loading?

A$.$ To increase the beam's weight

B$)$ To decrease the beam's span

B$.$ To maintain structural stability

D$)$ To distribute external forces

$5-$In a structural analysis scenario involving a linear varying Distributed Load, where does the maximum shear force occur?

A$)$ At the end of the beam

B$)$ At the midpoint of the beam

C$)$At the support of the beam

D$)$ At a point where the load is maximum