🔥 Underground Cable Quiz – Test Your Electrical Engineering Knowledge!
📢 Attention: In this quiz, 23 questions will be asked within 20 minutes. Negative marking of 1/4 is applied. Choose wisely!
📌 Important One Liner (Underground Cable Quiz)
- Underground cables are used to transmit electrical power below the ground level.
- They are safer compared to overhead lines due to less exposure to the environment.
- Common types include XLPE, PILC, and PVC insulated cables.
- XLPE cables have excellent thermal and electrical properties.
- Installation of underground cables requires proper trenching and insulation.
- These cables reduce electromagnetic interference and noise.
- They are ideal for urban areas where overhead lines are impractical.
- High cost and difficult maintenance are key challenges in underground cabling.
- The thermal resistivity of soil plays a role in cable design.
- Oil-filled cables were used before XLPE became dominant.
- Armoring is used in cables to protect from mechanical damage.
- Cables must be tested for insulation resistance and continuity.
- Sheath faults can lead to electric shocks or short circuits.
- Underground cables are buried at a standard depth of 0.9 to 1.2 meters typically.
- Voltage levels range from LV to EHV in underground cabling.
- Terminations and joints must be properly sealed to avoid moisture ingress.
- GIS substations often rely on underground cables for connections.
- Reactive power losses are minimal in underground cable systems.
- Special detection tools are used for locating underground cable faults.
- Cables are color-coded for phase identification during maintenance.
- Capacitance is higher in underground cables compared to overhead lines.
- Permissible current capacity depends on laying conditions.
- Increased initial cost is offset by longer life and less visual impact.
- Surge arresters are used to protect underground systems from voltage spikes.
- Thermal overload can cause insulation breakdown over time.
- Cable route selection considers accessibility, soil condition, and load demand.
- HDPE ducts are often used to enclose underground cables.
- Earth fault detection is easier with proper relay coordination.
- Maintenance windows are scheduled during low load periods.
- Permits are required for civil excavation in public zones.
- Shielding helps in minimizing leakage currents and EMI.
- Dielectric strength is a critical parameter in underground cables.
- Triple extrusion technology enhances cable insulation.
- Partial discharge testing is essential before commissioning cables.
🔑 SEO Keywords:
Underground cable MCQ quiz, Underground cable one liner, Electrical engineering cable quiz, Transmission cable questions, XLPE cable MCQs, Cable insulation quiz, Underground power system quiz, Cable fault MCQs, Cable depth standard, Underground cable advantages, Negative marking electrical quiz, Electrical quiz 2025, Electrical Zindagi quiz, Cable type MCQ, Cable laying quiz