cameroon gce advanced level 2025 design of electrical installations 1
cameroon gce advanced level 2025 design of electrical installations 1
1. The primary source of a hydro power station is:
A. Water
B. Fission of uranium 235
C. Coal
D. Wind
2. Eden and Song-loulou power plants of Eneo Cameroon are located on the:
A. Sanaga River
B. Benue river
C. Wouri river
D. Mongo river
3. The choke in a fluorescent lamp circuit has a role to:
A. Improve power factor
B. Supply the initial high voltage
C. Increase the current when the lamp is running
D. Interrupt inductive effect
4. To improve power factor from 0.76 to 0.93, the value of the capacitor needed to be connected in parallel with the load has for expression
A. P((tan arccos(0.76) – tan arccos(0.93)))/U
B. P((tan arccos(0.76) – tan arccos(0.93)))/Uω
C. P((tan arccos(0.76) – tan arccos(0.93)))/2πf
D. P((tan arccos(0.76) – tan arccos(0.93)))/2U
5. The metal used to make electrical wires is
A. Copper
B. Silver
C. Lead
D. Magnesium
6. A man receives an electric shock while urinating on a naked conductor. We say the shock is due to:
A. Indirect contact
B. Direct contact
C. Liquid contact
D. Sliding contact
7. The colour of protective conductor is:
A. Green – Yellow
B. Green – Red
C. Green – Blue
D. Green – Black
8. The conductors, which connect the consumers terminal to the distribution are
A. Distributors
B. Service mains
C. Feeders
D. Underground system
9. Socket circuits are usually wired using:
A. 1.5mm² cable
B. 2.5mm² cable
C. 4mm² cable
D. 6mm² cable
10. Earth electrode provides:
A. High resistance
B. Medium resistance
C. Low resistance
D. Very high resistance
11. The devices will receive voltage surge travelling on the transmission line is called
A. Lighting arresters
B. Relays
C. Step-down transformer
D. Switchgear
12. One disadvantage of hydroelectric energy is:
A. Limited plant locations
B. The cheapest energy source
C. Water brings with it enormous energy
D. Very low indirection emission
13. Transmission of electrical energy is done using:
A. High voltage and very high voltage
B. Low voltage
C. Very low voltage
D. Medium line
14. The neutral system that signals the first fault but does not go off and only goes off when the second fault occurs is
A. TNS neutral system
B. IT neutral system
C. TNC neutral system
D. TT neutral system
15. Grounding of substation does not provide
A. the supply of the transformer
B. ground connection for the system neutral
C. the discharge path for surge arresters
D. safety to the operating personals
