In a cable the maximum stress under operating conditions is at
conductor surface
insulation layer
sheath
armour
conductor surface
High tension cables are generally used up to
132 kV
66 kV
33kV
11kV
11kV
PVC stands for
post varnish conductor
pressed and varnished cloth
polyvinyl chloride
positive voltage conductor
polyvinyl chloride
If a cable of homogeneous insulation has a maximum stress of 10 kV/mm then the dielectric strength of insulation should be
10 kV/mm
30 kV/mm
15 kV/mm
5 kV/mm
10 kV/mm
In the cables sheaths are used to
prevent the moisture from entering the cable
provide proper insulation
provide enough strength
none of the above
prevent the moisture from entering the cable
Solid type cables are considered unreliable beyond 66 kV because
of corona loss between conductor and sheath material
there is a danger of breakdown of insulation due to the presence of voids
insulation may melt due to higher temperature
skin effect dominates on the conductor
there is a danger of breakdown of insulation due to the presence of voids
If the length of a cable is doubled its capacitance
becomes double
becomes one-fourth
becomes one-half
remains unchanged
becomes double
The material for armouring on cable is usually
none of the above
galvanised steel wire
steel tape
any of the above
any of the above
Cables generally used beyond 66 kV are
S.L. type
belted
oil filled
armoured
oil filled
Is a cable is to be designed for use on 1000 kV which insulation would you prefer ?
Compressed SFe gas
Impregnated paper
Vulcanised rubber
Polyvinyle chloride
Compressed SFe gas
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