Electrical Engineering Questions And Answers :: Cables: part2

Electrical Engineering : Cables QUESTIONS AND ANSWERS :: part2 : 1 to 5

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

1.The breakdown voltage of a cable depends on

presence of moisture
working temperature
time of application of the voltage
all of the above

2.Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?

Polyvinyle chloride
Vulcanised rubber
Impregnated paper
Compressed SFe gas

3.In cables the charging current

lags the voltage by 90�
leads the voltage by 90�
lags the voltage by 180�
leads the voltage by 180�

4.The thickness of metallic shielding on cables is usually

0.04 mm
0.2 to 0.4 mm
3 to 5 mm
40 to 60 mm

5.Underground cables are laid at sufficient depth

to minimise temperature stresses
to avoid being unearthed easily due to removal of soil
to minimise the effect of shocks and vibrations due to gassing vehicles, etc.
for all of the above reasons

More Cables QUESTIONS AND ANSWERS available in next pages

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