Underground Cables Quiz | Underground Cables Short Questions and Answers

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Questions
41 The material for armouring on cable is usually
A steel tape
B galvanised steel wire
C any of the above
D none of the above

Answer: any of the above
42 Pressure cables are generally not used beyond
A 66 kV
B 11 kV
C 132 kV
D 33 kV

Answer: 66 kV
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43 cables are used for 132 kV lines.
A Extra super voltage
B Extra high tension
C High tension
D Super tension

Answer: Extra super voltage
44 In case of three core flexible cable the colour of the neutral is
A blue
B brown
C black
D none of the above

Answer: blue
45 The insulating material for cables should
A have all above properties
B be non-hygroscopic
C be acid proof
D be non-inflammable

Answer: have all above properties
46 Empire tape is
A varnished cambric
B vulcanised rubber
C impregnated paper
D none of the above

Answer: varnished cambric
47 The thickness of the layer of insulation on the conductor, in cables, depends upon
A voltage
B power factor
C reactive power
D current carrying capacity

Answer: voltage
48 The current carrying capacity of cables in D.C. is more thanthat in A.C. mainly due to
A smaller dielectric loss
B absence of ripples
C absence of harmonics
D none of the above

Answer: smaller dielectric loss
49 Low tension cables are generally used up to
A 1000 V
B 700 V
C 200 V
D 500 V

Answer: 1000 V
50 High tension cables are generally used up to
A 11kV
B 132 kV
C 33kV
D 66 kV

Answer: 11kV
51 In capacitance grading of cables we use a ______ dielectric.
A composite
B hygroscopic
C porous
D homogeneous

Answer: composite
52 If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be
A 10 kV/mm
B 30 kV/mm
C 5 kV/mm
D none of the above

Answer: 10 kV/mm
53 Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?
A Compressed SFe gas
B Impregnated paper
C Vulcanised rubber
D Polyvinyle chloride

Answer: Compressed SFe gas
54 Which of the following protects a cable against mechanical injury ?
A Armouring
B Sheath
C Bedding
D None of the above

Answer: Armouring

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