1
The insulating material for a cable should have
Answer: all of the above
Questions
2
Which of the following insulation is used in cables ?
Answer: Any of the above
3
In a cable immediately above metallic sheath _____ is provided.
Answer: Bedding
4
In single core cables armouring is not done to
Answer: avoid excessive sheath losses
7
In the cables, the location of fault is usually found out by comparing
Answer: the capacitances of insulated conductors
9
Solid type cables are considered unreliable beyond 66 kV because
Answer: there is a danger of breakdown of insulation due to the presence of voids
11
In the cables, sheaths are used to
Answer: prevent the moisture from entering the cable
13
Underground cables are laid at sufficient depth
Answer: to minimise the effect of shocks and vibrations due to gassing vehicles, etc.
15
The underground system is ...........costly then the equivalent overhead line system
Answer: More
16
Metallic shielding is provided on underground cables to
Answer: All of the above
17
The materials used for armouring of an underground cable is
Answer: Either A or B
18
In underground cables the electrostatic stress is
Answer: Maximum at contactor surface and minimum at the sheath
19
Underground cables are laid at sufficient depth so as to
Answer: Minimise effects of shocks and vibrations owing to passing vehicles etc.
20
A layer similar to bedding is provided on the armouring to protect the whole cable from all atmospheric conditions. Which layer is this?
Answer: Serving.
