cameroon gce intermediate level 2025 electrical technology and diagram 1
cameroon gce intermediate level 2025 electrical technology and diagram 1
- In an electrical installation, PROMOTELEC Label requires:
A 8 lamps per circuit and 5 sockets per circuit
B 5 lamps per circuit and 8 sockets per circuit
C 5 lamps per circuit and 5 sockets per circuit
D 8 lamps per circuit and 8 sockets per circuit
- Figure 1
Figure 1 represents:
A A switch
B A Residual Current Switch
C An isolator
D An isolator switch
- The life span of an incandescence lamp is estimated to around:
A 2000 hours of functioning
B 1000 hours of functioning
C 4000 hours of functioning
D 6000 hours of functioning
- If a hydroelectric power generation used a Francis turbine; hence the height of water fall,
A Less than 30 meters
B Greater than 200 meters
C Less than 200 meters
D Between 30 meters and 200 meters
- Figure 2
Figure 2 represents
A The symbol of a coil
B The symbol of a tele-switch
C The symbol of a timer
D The symbol of a time-switch
- Figure 3
What does the symbol in figure 3 represent?
A A Residual Current switch
B A switch
C A Residual Current Circuit-breaker
D An isolator
- In Cameroon, low voltage used for distribution of electrical energy is:
A 220V/380V – 50Hz
B 380V/660V – 50Hz
C 230V/400V – 50Hz
D 400V/690V – 50Hz
- The starting current of a three phase induction motor using direct on line starting is between:
A 3In to 4In
B 2.5In to 8In
C 4In to 8In
D 2.5In to 4In
- Buchholz relay used in power transformers ensures:
A Protection against low voltage
B Protection against internal faults
C Protection against overcurrent
D Protection against over leakage current
- In an electric conduit, the maximum volume to be occupied by conductors should be:
A One-third
B Half
C One-quarter
D Three-quarter
- The protection of persons against direct contact in electrical installation is ensured by
A High sensitivity
B Medium sensitivity
C Residual current
D Residual current device
