Block laying Paper 2 WASSCE (SC), 2016

Question 2

(a)Sketch a corner profile and label the following:
     (i)building line;
     (ii)trench line mark;
     (iii)wall line mark.

(b)State one use of each of the following types of brick

(i)         fire brick;
(ii)        facing brick.


(c) List four types of block used for wall construction.

 

Observation

Most candidates were able to:
           
- sketch a corner profile and label the parts;
-           list four types of block used for wall construction.

However, few of them were unable to state one use of fire brick and facing brick.

b(i)       Uses of firebricks

-     lining of chimney shafts;
-     construction of boilers;

  • construction of ovens;
  • construction of kilns;
  • construction of furnace.  

            (ii)        Uses of facing bricks:

  • they are used for facing buildings;
  • they are used for constructing load and non-load bearing walls;
  • they are used to provide a durable and pleasing finish or aesthetic effects in building;
  • they are used as voussoirs in arch construction.

(c)i.      Types of blocks used for wall construction:
According to materials:       

  • sandcrete block;
  • landcrete block;
  • concrete block;
  • clay block.

ii.         According to shapes:

  • hollow block;
  • solid block;
  • cellular block.

 

iii.        According to densities:

  • lightweight aggregate block;
  • dense aggregate block.