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WorksheetsStrands,Wires,Conduits
Total questions: 15
Worksheet time: 5mins
Which of the following best explains why stranded wires are preferred over solid wires in places requiring movement?
They are cheaper
They have higher voltage capacity
They are made of aluminum
They are more flexible and durable
A conductor made by twisting several thin wires together is called:
Solid wire
Single core wire
Stranded wire
Multicore wire
Which property of strands improves the performance of a wire?
Thickness
Colour
Flexibility
Insulation
If a wire breaks due to repeated bending, it is most likely a:
Stranded wire
Solid wire
Multicore wire
PVC wire
Which of the following correctly matches the wire type with its construction?
Single core – many conductors
Multicore – one conductor
Solid wire – one conductor
Stranded wire – one conductor
A cable that contains two or more insulated conductors inside one outer sheath is called:
Stranded wire
Solid wire
Single core wire
Multicore wire
The main purpose of insulation on a wire is:
To increase strength
For safety
To increase current
For flexibility
Which of the following is NOT a function of a conduit?
Carrying electric current
Making wire replacement easier
Protecting wires
Providing safety
Which conduit should be used where bending and movement are required?
Flexible conduit
Metal conduit
Rigid conduit
PVC conduit
Which conduit is best suited for permanent and straight installations?
Rigid conduit
Flexible conduit
PVC conduit
Plastic conduit
Why is metal conduit preferred where strong protection is needed?
It is flexible
It is corrosion resistant
It is cheaper
It provides good mechanical protection
Which of the following is the correct colour code combination?
Live – Green, Neutral – Red, Earth – Blue
Live – Red/Brown/Black, Neutral – Blue/White, Earth – Green/Yellow
Live – Blue, Neutral – Green, Earth – Red
Live – Yellow, Neutral – Black, Earth – White
The main purpose of colour coding of wires is to:
Improve appearance
Reduce wire size
Identify wires and avoid wrong connections
Increase current flow
Which of the following statements is TRUE?
Solid wires are more flexible than stranded wires
Stranded wires are cheaper than solid wires
PVC conduits provide better mechanical protection than metal
Conduits can be surface mounted or concealed in walls
Which combination of features best describes a stranded wire?
Flexible, durable, many thin conductors
Stiff, cheap, single conductor
Rigid, strong, single core
Heavy, metallic, solid conductor
