ii) Land surveying is one of the primary activity in any construction and the use of the Levelling instruments and taking accurate reading are very much important.

a) How do you explain; “Fore sight, Intermediate Sight and Back sight “ in levelling?

b) Name three (03) types of surveying/ levelling methods used in construction sites

iii) Traps are installed in wastewater / sewage disposal systems; Explain the purpose of traps. Name three (03) types of traps giving examples of the places where they are fixed.