Questions

a$)$ The illustration below represents a plan for differential series leveling. The values shown on each line represent the sights $($BS$/$FS$)$ observed at the staff at each turning point position. Prepare and compute necessary field notes for this work.

$-$ instrument set up; BM$/$CP $-$ Benchmark and turning$/$change point

$[10$ Marks$]$

b$)$ The following readings were observed with a level: $1\mathrm{.}143($BM$,$ RL:$112\mathrm{.}28),1\mathrm{.}765,2\mathrm{.}566,3\mathrm{.}820CP$;$1\mathrm{.}390,2\mathrm{.}262,0\mathrm{.}664,0\mathrm{.}433CP$;$3\mathrm{.}722,2\mathrm{.}886,1\mathrm{.}618,0\mathrm{.}616$ TBM$.$

Draw up a level book and reduce the levels by

$($i$)$ Rise and Fall method,

$($ii$)$ height of collimation.

$[20$ Marks$]$

c$)$ State the other method of reducing levels and briefly explain four applications of leveling.

$[10$ Marks$]$