Building Construction Paper 2,Nov/Dec. 2014

Questions:		1	2	3	4	5		Main

General Comments
Weakness/Remedies
Strength

Question 3
(a) State three reasons for checking the accuracy of setting out before commencing construction work; (b) Sketch each of the following setting out tools; (i) club hammer (ii) builder’s square (c) Explain the difference between batching concrete by volume and batching concrete by weight. .
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OBSERVATION
All the candidates were unable to: state the reasons for checking the accuracy of setting out before commencing construction work; sketch the club hammer and builder’s square used for setting out correctly; explain the difference between batching concrete by volume and batching concrete by weight. The expected response to question 3 as given below: 3 (a) Reasons for checking the accuracy of a setting out To ensure that: a right-angle corner of a building; the building is erected on the correct plot of land; the overall sizes (length and breadth) are according to those shown on the drawing; regard is paid to the local building regulation; mistakes which may proof too costly to amend at a later stage are avoided. (b) (c) Difference between batching concrete by volume and by weight. Batching by volume is the process of measuring out the quantities of concrete constituent according to a specified ratio with the aid of a gauge-box while batching by weight is the process of measuring out the quantities of concrete constituent to a specified ratio by means of weighing device.