Observation

      The expected answers were;

(b) (i)  Tower:-  It carries the high voltage transmission lines and keep them separated
from their surroundings and from each other.                                                     
(ii) Insulators: – They are used for insulation purposes to:

• avoid short circuit;
• support conductors;
• conductor heat from conductors etc.                                                       

(iii) Conductors:- They are used for the transmission of power or current from
generating stations to points where the power is consumed through substations.                                                                                            
Many candidates who attempted this question did fairly well.