waecE-LEARNING
Building Construction Paper 2,Nov/Dec. 2012  
Questions:   1 2 3 4 5   Main
General Comments
Weakness/Remedies
Strength




Question 1

  1. Explain the following concreting terms:
  2. batching;
  3. water-cement ratio;
  4. curing.
  1. With the aid of annotated sketch(es), illustrate the following methods of checking the accuracy of setting out a rectangular building:
  2. diagonal methods;
  3. builders’ square method;
  4. 3 : 4 : 5 method.

 

  1. State three methods of transporting concrete mix on site.
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OBSERVATION

 Few candidates were able to:

-           explain the given concreting terms;
-           state the methods of transporting concrete mix on site.

However, majority of them failed to use annotated sketch(es) to illustrate the methods of checking the accuracy of setting out a rectangular building.

The expected response to question 1 is as given below:

  1. Explanation of concreting terms

 

  1. Batching:  Is the method of measuring concrete materials either by volume or weight.  OR The method of measuring the constituent (concrete) materials either by volume or by weight.
  1. Water-cement ratio:  Weight of water to that of cement in a particular mix.  OR Proportion of water by weight to the proportion of cement by weight, that is added to a concrete mix.

 

  1. Curing:  Is the process of keeping a placed mix damp to enable it attain the desired strength.

(c)        Three methods of transporting concrete

  1. wheel barrow
  2. head pan
  3. chute
  4. dumper
  5. conveyor belt
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