Choose the correct answer.

Construct the influence lines for the beam shown below for:

$--$ the vertical reactions at supports A & C

$--$ the shear and bending moment at Point $B$

What is the maximum positive value for RA$?$

$\frac{12}{7},\frac{1}{2},2$

When the load is at Point $B,$ what is the value of $RA?$

$\frac{1}{2},-\frac{2}{7},0,1$

What is the maximum value for the RC $?$

$\frac{1}{2},\frac{9}{7},0,1$

Where is the load located when RC has its maximum value?

A

$B$

C

D

Where is the load located when RC has its maximum value?

$\frac{9}{7},\frac{1}{2},1,\frac{2}{7}$

What is the maximum positive moment at Point $B?$

$\frac{2}{7},3\mathrm{.}5,0,2$

What is the maximum negative moment at Point $B?$

$-3\mathrm{.}5,-1,-\frac{1}{2},-2$

If a moving concentrated load of $10$ kN was placed on this beam, what would the

absolute value of the maximum shear at Point $B$ be$?$

$2\mathrm{.}9$ kn

$5$ kn

$10$ kn

$20$ kn

If a moving concentrated load of $10$ kN was placed on this beam, what would the largest

positive moment at Point B be$?$ And, where would the load be located to generate this

largest moment?

$20$ kN $,$ Point B

$35$ kN $),$ Point B

$10$ kN $,$ Point B

$35$ kN $,$ Point D

$20$ kN $,$ Point D