gce 2021 intermediate level electrical technology and diagram 2
gce 2021 intermediate level electrical technology and diagram 2
SECTION A: ELECTRICAL TECHNOLOGY
1)
(a) Compare and give two advantages and two disadvantages each of incandescent lamps over fluorescent
lamps. (6 marks)
(b) Explain the phenomenon of stroboscopic effect in fluorescent lamps. (8 marks)
(c) If the choke of a fluorescent lamp is short circuited while the lamp is functioning, what will
happen to the lamp? (6 marks)
(d) Explain the possible causes of a fluorescent lamp glowing without starting. (5 marks)
(e) What is the role of the powder inside the tube of a fluorescent lamp? (5 marks)
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2)
(a) Give the symbols of the following switch gears
(i) One way switch (1marks)
(ii) Two way switch (1 marks)
(iii) Tele switch (1 marks)
(iv) Fused isolator (1 marks)
(v) Three phase contactor (1 marks)
(vi) Three phase thermal relay (1 marks)
(vii) Three phase circuit breaker (1 marks)
(b) Give the area of application of each of the switch gears listed above (7marks)
(c) Draw and label all the parts of the following lamps
(i) An incandescent lamp (9 marks)
(ii) A fluorescent lamp
