The advantage of oil filled cables is
The advantage of oil filled cables is
The electrostatic stress in underground cables is
The electrostatic stress in underground cables is
The insulating material for cables should
The insulating material for cables should
In a cable immediately above metallic sheath ________ is provided.
In a cable immediately above metallic sheath ________ is provided.
The insulation of the cable decreases with
The insulation of the cable decreases with
Dielectric strength of rubber is around
Dielectric strength of rubber is around
In a cable the voltage stress is maximum at
In a cable the voltage stress is maximum at
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
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
The insulating material should have
The insulating material should have
Copper as conductor for cables is used as
Copper as conductor for cables is used as
The breakdown voltage of a cable depends on
The breakdown voltage of a cable depends on
Capacitance grading of cable implies
Capacitance grading of cable implies
Which of the following protects a cable against mechanical injury?
Which of the following protects a cable against mechanical injury?
In capacitance grading of cables we use a _________ dielectric.
In capacitance grading of cables we use a _________ dielectric.
Which of the following insulation is used in cables?
Which of the following insulation is used in cables?
In case of three core flexible cable the color of the neutral is
In case of three core flexible cable the color of the neutral is
It is difficult to maintain oil filled cables.
It is difficult to maintain oil filled cables.
Low tension cables are generally used up to
Low tension cables are generally used up to
Cables, generally used beyond 66 kV are
Cables, generally used beyond 66 kV are
Solid type cables are considered unreliable beyond 66 kV because
Solid type cables are considered unreliable beyond 66 kV because
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to
The bedding on a cable consists of
The bedding on a cable consists of
The insulating material for a cable should have
The insulating material for a cable should have
The thickness of the layer of insulation on the conductor, in cables, depends upon
The thickness of the layer of insulation on the conductor, in cables, depends upon
Cables for 220 kV lines are invariably
Cables for 220 kV lines are invariably
If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be
If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be
Rubber is most commonly used insulation in cables.
Rubber is most commonly used insulation in cables.
A cable carrying alternating current has
A cable carrying alternating current has
In the cables, the location of fault is usually found out by comparing
In the cables, the location of fault is usually found out by comparing
Pressure cables are generally not used beyond
Pressure cables are generally not used beyond
The metallic sheath may be made of lead or lead alloy or of aluminum.
The metallic sheath may be made of lead or lead alloy or of aluminum.
Empire tape is
Empire tape is
In a cable, the maximum stress under operating conditions is at
In a cable, the maximum stress under operating conditions is at
PVC stands for
PVC stands for
If the length of a cable is doubled, its capacitance
If the length of a cable is doubled, its capacitance
Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?
Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?
The surge resistance of cable is
The surge resistance of cable is
The material for armouring on cable is usually
The material for armouring on cable is usually
Conduit pipes are normally used to protect ________ cables.
Conduit pipes are normally used to protect ________ cables.
The disadvantage with paper as insulating material is
The disadvantage with paper as insulating material is
The minimum dielectric stress in a cable is at
The minimum dielectric stress in a cable is at
High tension cables are generally used up to
High tension cables are generally used up to
The breakdown of insulation of the cable can be avoided economically by the use of
The breakdown of insulation of the cable can be avoided economically by the use of
If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be
If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be
Polyethylene has very poor dielectric and ageing properties.
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.
In congested areas where excavation is expensive and inconvenient 'draw in system' of laying of underground cables is often adopted.
Underground cables are laid at sufficient depth
Underground cables are laid at sufficient depth
The inters heaths in the cables are used to
The inters heaths in the cables are used to
The relative permittivity of rubber is
The relative permittivity of rubber is
The thickness of metallic shielding on cables is usually
The thickness of metallic shielding on cables is usually
Natural rubber is obtained from milky sap of tropical trees.
Natural rubber is obtained from milky sap of tropical trees.
In cables the charging current
In cables the charging current
In single core cables armouring is not done to
In single core cables armouring is not done to
In capacitance grading a homogeneous dielectric is used.
In capacitance grading a homogeneous dielectric is used.
_________ cables are used for 132 kV lines.
_________ cables are used for 132 kV lines.
The advantage of cables over overhead transmission lines is
The advantage of cables over overhead transmission lines is
In the cables, sheaths are used to
In the cables, sheaths are used to
