Underground Cables Quiz

What are the advantages of underground cables?

• Require frequent maintenance

• High voltage drops

• High chances of faults

• Better general appearance

Which of the following is NOT a property of insulation materials for cables?

• High resistivity

• High mechanical strength

• Affected by acid or alkalis

• Non-inflammable

Which insulating material is commonly used for low voltage power distribution systems?

• Rubber

• PVC

• Impregnated paper

• VIR

What is the main drawback of using underground cables compared to overhead systems?

• Less chances of faults

• Greater installation cost

• Low maintenance cost

• Small voltage drops

Which material is used for insulation in PVC insulated cables?

• PVC

• Impregnated paper

• Varnished cambric

• Rubber

What is the classification of cables based on the number of conductors used?

• Power Cables and Control Cables

• Single Core Cable and 3 Core Cable

• PIC or PILC and PVC

• LT Cables and HT Cables

What is the classification of cables based on the voltage rating?

• Power Cables and Control Cables

• Single Core Cable and 3 Core Cable

• PIC or PILC and PVC

• LT Cables and HT Cables

Which method is used for laying underground cables where the cable is laid in open pipes or troughs?

• Murray loop test

• Solid system

• Draw-in system

• Direct laying

What is the most commonly used cable in the industry based on insulation material?

• PIC or PILC

• PVC

• XLPE

• PE

Which test is used for locating earth fault or short-circuit fault in underground cables using a Wheatstone bridge principle?

• Direct laying

• Solid system

• Varley loop test

• Murray loop test