WorksheetsTypes of cable installation in Electrical Network
Total questions: 10
Worksheet time: 5mins
What are the types of Cable Installations in Electrical Network?
Underground Ducts, Aerial Cable, Direct Burial, Open-Wire
Aerial Cable, Above-Ground Conduits, Underwater Cable, Direct Burial
Underwater Cable, Direct Burial, Above-Ground Conduits, Open-Wire
Open-Wire, Aerial Cable, Above-Ground Conduits, Underground Ducts
Which type of cable installation consists of uninsulated conductors mounted on poles or structures?
Aerial Cable
Underground Ducts
Open-Wire
Above-Ground Conduits
What is the main disadvantage of open-wire construction?
High cost
Low initial cost
Susceptible to mechanical damage
Requires less space
Which type of cable installation is used for replacing open wiring and provides greater safety and reliability?
Aerial Cable
Underground Ducts
Above-Ground Conduits
Direct Burial
What is the main advantage of self-supporting aerial cable over messenger-supported aerial cable?
Provides high tensile strength
Suitable for short distances
Requires less space
Can span relatively large distances
Which type of cable installation affords the highest degree of mechanical protection available in above-ground conduit systems?
Plastic conduits
Rigid steel conduits
Intermediate-grade metal conduits
Thin-wall EMT
Where are underground ducts used?
Where space is limited
Where mechanical protection is not required
Where high vertical clearances are needed
Where above-ground conductors would be unattractive
What type of cables are suitable for direct burial in the ground?
Cables with high maintenance requirements
Moisture-resistant, insect and rodent damage-resistant cables
Cables with low current carrying capacity
Cables with paper insulation
When is submarine cable used?
When space is limited
When mechanical protection is not required
When no other cable system can be used
When high vertical clearances are needed
Why must the shields and metallic sheaths of power cables be grounded?
To improve the mechanical protection
To prevent hazards and rapid degradation
To reduce the maintenance costs
To increase the current carrying capacity
