QUESTION FOUR $(20$ Marks$)$

a$)$ Describe with examples the three types of errors encountered in distance measurement $(5$ Marks$)$

b$)$ A steel tape of nominal length $30m$ was used to measure the distance between two points A and $B$ on a structure. The following measurements were recorded with the tape suspended between A and $B$ :

$\backslash$table$[[$Line Length measured Slope angle,$\backslash$table$[[$Mean$],[$temperature$]],$Tension applied,,$],[$AB$,29\mathrm{.}872m,3{40}^{\text{'}},5C,120N$