gce 2022 intermediate level electrical technology and diagram 1

gce 2022 intermediate level electrical technology and diagram 1

gce 2022 intermediate level electrical technology and diagram 1

The differential circuit breaker on the supply
authority board in our homes serves as a
A control and isolation
B protective and control device
C control and counting device
D protective and counting device
2. Why are conductors used for high voltage
transmission usually stranded ?
A For easy handling
B They arc cheaper
C They have reduced resistivity
D They have higher tensile strength
7. The symbols of fig 2 represent:
* o
Figure 2 (a) (b)
A Circuit breaker and an isolator switch
B Isolator and thermal relay
C Circuit breaker and a contactor
D Circuit breaker and power contact of a
commutator
3. Carbonis used in making brushes in d.c machines
because
A it has high contact resistance which is good
in assisting commutation
B it has low resistance and assist in
commutation
C it has variable resistance which is good in
assisting commutation
D it has constant resistance which is good in
assisting commutation
8. The flikering effect influorescent lamps is more
intensive at
A lower frequencies
B higher frequencies
C lower voltages
D higher voltages
4. Electrical energy is transmitted at high voltage so
as to
A reduce iron losses
B reduce copper losses
C improve on the efficiency of the production
station
D increase the current on the transmission
9. Fluorescent lamp tubes are coated with white
powder at the inner part so as to
A improve the life span
improve the appearance of the tube
C change the colour
D produce light radiation due to electrons
emissions
B
line
10. Candela is the unit of
A Luminous flux
Luminous intensity
C Illumination
D luminance
5. The symbol of fig 1 represents
U^0 | B
I Figure I
A a No-volt relay
B a volt relay
C an under voltage relay
D an over voltage relay
11. Illumination oi one lumen per square meter is
called
A Lumen
B Lux
C luminance
D Luminous flux