cameroon gce intermediate level electrical technology and diagrams 1

cameroon gce intermediate level electrical technology and diagrams 1

cameroon gce intermediate level electrical technology and diagrams 1

1. The materials suitable for the production of
brushes for rotating machines is:

A Copper alloy
B Carbon
C Aluminium
D Carbite

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2. The cross sectional area of a conductor is
2.5mm
2. Calculate its radius

A 1.784mm
B 1.25mm
C 0.446mm
D 0.892mm

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3. A 240V single phase load obtains its supply from
the secondary of a transformer coupled in:

A Star with 415V between lines
B Delta with 415V between lines
C Star with 240V between lines
D Delta with 240V between lines

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4. The emf induced at the secondary of a
transformer is due to

A Self-induction
B Magnetic induction
C Mutual induction
D Electromagnetic induction

______________________________________________
5. The fuse to protect a heating element of 5000W at
240V is:

A 25A
B 30A
C 20A
D 35A

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