Question

In Direct laying of underground cable bricks are put at top for –

a. Indication

b. Insulation

c. Integration

d. Invitation
​

Answer 1

Answer:

Option B is the correct answer

Answer 2

In the Direct laying of underground cable, bricks are put at the top for Insulation (Option B).

Explanation:

• Underground cables are nothing but the cables that are ins-talled under the ground.

• This can be done by adopting any of the three methods of laying underground cables namely: (i) direct laying, (ii) draw-in system (iii) solid system.

• Among them, direct laying is a simple and cheaper method in which a trench of about 1.5 meters deep and 45 cm wide dug, and thereby making a thick sand bed in it before resting the cable.

• This sand acts as a moisture absorber.

• Once the laying is done, the trench is covered with insulating particles like bricks, sand, etc to protect the cables from mechanical injuries.

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