A. Polyvinyle chloride
B. Vulcanised rubber
C. Impregnated paper
D. Compressed SFe gas
E. none of the above
Correct Answer: Compressed SFe gas ✔
Last Updated: December 12, 2018
Related MCQs
- The advantage of cables over overhead transmission lines is__________?
- Capacitance grading of cable implies__________?
- A cable carrying alternating current has__________?
- The electrostatic stress in underground cables is_________?
- Underground cables are laid at sufficient depth__________?
- The thickness of metallic shielding on cables is usually__________?
- The breakdown voltage of a cable depends on__________?
- The advantage of oil filled cables is_________?
- Copper as conductor for cables is used as________?
- Cables for 220 kV lines are invariably__________?
- If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be__________?
- The insulating material should have__________?
- The disadvantage with paper as insulating material is__________?
- Rubber is most commonly used insulation in cables
- In capacitance grading a homogeneous dielectric is used
- Natural rubber is obtained from milky sap of tropical trees
- Polyethylene has very poor dielectric and ageing properties
- In congested areas where excavation is expensive and inconvenient ‘draw in system’ of laying of underground cables is often adopted
- It is difficult to maintain oil filled cables__________?
- The metallic sheath may be made of lead or lead alloy or of aluminium ?
- If the length of a cable is doubled, its capacitance__________?
- In the cables, sheaths are used to__________?
- The breakdown of insulation of the cable can be avoided economically by the use of__________?
- The intersheaths in the cables are used to__________?
- If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be__________?
- In cables the charging current__________?
- Solid type cables are considered unreliable beyond 66 kV because__________?
- A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become__________?
- Pressure cables are generally not used beyond__________?
- The relative permittivity of rubber is__________?
- The material for armouring on cable is usually__________?
- Conduit pipes are normally used to protect _______ cables
- PVC stands for__________?
- In capacitance grading of cables we use a _______ dielectric?
- The surge resistance of cable is__________?
- The minimum dielectric stress in a cable is at__________?
- In the cables, the location of fault is usually found out by comparing__________?
- Cables, generally used beyond 66 kV are__________?
- Low tension cables are generally used up to__________?
- High tension cables are generally used up to__________?
- Dielectric strength of rubber is around__________?
- In a cable, the maximum stress under operating conditions is at__________?
- In case of three core flexible cable the colour of the neutral is_________?
- In single core cables armouring is not done to________?
- The insulating material for cables should__________?
- The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to__________?
- cables are used for 132 kV lines__________?
- The bedding on a cable consists of__________?
- In a cable immediately above metallic sheath ______ is provided
- Empire tape is__________?
- Which of the following protects a cable against mechanical injury__________?