waecE-LEARNING
Building Construction Paper 2,Nov/Dec. 2011  
Questions:   1 2 3 4 5   Main
General Comments
Weakness/Remedies
Strength




Question 5

(a)        State the function of a trap in sanitary installation.

(b)        List five sanitary appliances.

(c)        With the aid of a sketch, describe the method of testing a drain line for water tightness.

(d)        State three purposes of providing ceiling in a building.

 
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OBSERVATION

Most candidates were able to:

  1. state the function of a trap in a sanitary installation;
  2. list the sanitary appliances.

 

However, they were unable to:

  1. describe the method of testing a drain line for water tightness;
  2. state the purposes of providing ceiling in a building.

           
The expected response to question 5 is as given below:

5(a)      Function of a trap in sanitary installation:

            To provide a water seal against the outflow of foul air

5(b)      Five sanitary appliances:
           
            (i)         Water closet
            (ii)        Wash hand basin
            (iii)       Sink
            (iv)       Shower trays
            (v)        Bidets
            (vi)       Urinals

5(c)

 5(c)     -     Block the lower end of the drain line by inserting a drain stopper or plug.

  1. Fill the section to be tested with water up to the upper end of the drain line.
  2. Plug the upper end with a drain stopper.
  3. Connect one end of rubber tubing to the stopper and the other to a water vessel with a pressure gauge.
  4. Allow an interval of about 45 to 60 minutes for observation.  A leakage is indicated by a drop in the level of water in the vessel.

5(d)      Three purposes for providing ceiling in a building

    • It provides thermal insulation in the building.
    • It serves as a barrier to sound transmission.
    • It accommodates services.
    • It enhances the beauty of the room.
    • It conceals the roof members.
    • It checks the movement of birds and insects into the building.
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