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Optical Fiber Cable Installation

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Questions and Answers

What is the recommended trench width when the water level is above 0.50 meters and less than 1 meter?

0.4 meter
0.8 meter
0.6 meter (correct)
1.0 meter

What is the purpose of grouting bags in the pipe installation process?

To remove water from the trench
To seal the pipe and protect it from water ingress (correct)
To provide additional support to the pipe
To mark the location of the pipe

In rocky soil, what is the recommended width of the trench at the top?

40-50 cm
06-40 cm (correct)
50-60 cm
05-06 cm

What is the purpose of dropping small pebbles in the trench in rocky soil?

To provide a smooth surface for the pipe (C) Signup and view all the answers

What is the recommended ratio of cement to sand in grouted bags?

1:8 (D) Signup and view all the answers

When the area is such that water does not physically appear on the surface but the dug trench is immediately filled with water, what is the recommended trench depth?

1.0 meter (A) Signup and view all the answers

What is the minimum density requirement for HDPE ducts?

> 0.950 gm/cm³ (C) Signup and view all the answers

What is the required tensile strength at yield for HDPE ducts?

> 22 MPa (B) Signup and view all the answers

How should the earth be treated in trenches on streets or highways?

Well tamped as it is placed (C) Signup and view all the answers

What is the maximum operating temperature for HDPE ducts?

60°C (A) Signup and view all the answers

What should be done with the surplus soil after trench backfilling?

Remove it immediately (B) Signup and view all the answers

What is the required test pressure for HDPE ducts?

14-16 bars (C) Signup and view all the answers

What is the recommended time period for the retention of electrical and mechanical properties of the ducts?

Twenty years (C) Signup and view all the answers

What is the purpose of using suitable sized caps on the ducts?

To protect the ducts against ingress of dirt, moisture, and insects (D) Signup and view all the answers

What is the recommended method for laying and pulling the HDPE ducts?

Pneumatic method (A) Signup and view all the answers

What is the purpose of pre-lubricating the inner surface of the ducts?

To reduce the friction during cable pulling (C) Signup and view all the answers