Related Questions

In the cables, sheaths are used to
A Prevent the moisture from entering the cable
B Provide enough strength
C Provide proper insulation
D None of the above
Which of the following methods is used for laying of underground cables?
A Direct laying
B Draw-in-system
C Solid system
D All of the above
Underground cables are laid at sufficient depth
A To minimize temperature stresses
B To avoid being unearthed easily due to removal of soil
C To minimize the effect of shocks and vibrations due to gassing vehicles, etc.
D For all of the above reasons
In congested areas where excavation is expensive and inconvenient 'draw in system' of laying of underground cables is often adopted.
A Yes
B No
The electrostatic stress in underground cables is
A Same at the conductor and the sheath
B Minimum at the conductor and maximum at the sheath
C Maximum at the conductor and minimum at the sheath
D Zero at the conductor as well as on the sheath
The material commonly used for insulation in high voltage cables is
A Lead
B Paper
C Rubber
D None of the above
Rubber is most commonly used insulation in cables.
A Yes
B No
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is
A Darcy’s formula
B Slichter’s formula
C Hazen’s formula
D Lacy’s formula
Most commonly used joint in the underground pipe lines is the
A Sleevejoint
B Coupling
C Flange
D Expansion joint
The material generally used for armour of high voltage cables is
A Aluminium
B Steel
C Brass
D Copper

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