Question 2
. (a) (i) List two utility services required on a construction site
- State one reason for each of the services mentioned in 2(a)(i).
(b) State one safety measure each to be observed on site when:
(i) excavating deep foundation trenches manually;
(ii) erecting metal scaffold;
- using a concrete mixer.
(c) what is meant by the term site clearing?
A good number of candidates were able to:
- State one safety measure each to be observed on site when:
- excavating deep foundation trenches manually;
- erecting metal scaffold;
- using a concrete mixer.
- explain what is meant by the term site clearing.
Observation
However, many of them failed to list the utility services required on a construction site.
The expected response to question 2 is as given below:
(a) (i) Utility services needed on a construction site:
- telephone;
- electricity;
- water;
- gas.
(ii) One reason for the provision of the services:
- telephone – for communication with head office and suppliers or any authorized
communication;
- electricity – for supply of power to site for power tools and lighting;
- water – for supply of fresh water for drinking, for construction work and washing.
- gas - for heating purposes.
(b) Safety measure to be observed on site when:
(i)Excavating deep foundation trenches manually:
- keep heavy equipment away from trench-edges;
- inspect trenches at the start of each shift;
- keep surcharge loads at least 0.6m away from trench edges.
- batter the sides of the trench.
- support the sides of the trench.
(ii)Erecting a metal scaffold:
- sound materials should be used for the construction;
- standard should rest on a base plate;
- transoms should be properly secured to the standards;
- it should be well braced;
- provision of toe board to prevent tools from falling off;
- provision of guard rail;
- platforms should be closely boarded.
(iii) Using a concrete mixer:
- the mixer should be on a flat and level surface to prevent tipping rolling or falling;
- the mixer should be inspected before use;
- it should not be used in wet location;
- protective clothing should be worn;
- the drum should not be overloaded beyond its capacity;
- it should be operated by a competent person.
(c) The term site clearing:
The act of demolishing existing structures, grubbing out of bushes and trees and the removal of soil to reduce levels.