Basic Electricity 2, WASSCE (SC), 2016

Question 5

  • (a)State three advantages of a ring distribution system of electrical supply.
  • (b)State the two operating voltage levels for a transmission line

 

Observation

The expected answers were;

  1.     (a)  Advantages of a ring distribution system of electrical supply

(i)        Can use smaller supply cables than a radial distribution system.
(ii)       Offers greater security of supply than a radial distribution.
(iii)     more reliable
(iv)      more efficient

 

(b)      Operating Voltages
(i)        132 kV
(ii)       330 kV 

Candidates did not perform well in this question.