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Free download in PDF Cables Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
The material for armouring on cable is usually
[A]
ssteel tape
[B]
galvanised steel wire
[C]
any of the above
[D]
none of the above
42
Which of the following protects a cable against mechanical injury ?
[A]
Bedding
[B]
Sheath
[C]
Armouring
[D]
none of the above
43
Which of the following insulation is used in cables ?
[A]
Varnished cambric
[B]
Rubber
[C]
Paper
[D]
Any of the above
44
The thickness of the layer of insulation on the conductor, in cables, depends upon
[A]
reactive power
[B]
power factor
[C]
voltage
[D]
current carrying capacity
45
The bedding on a cable consists of
[A]
hessian cloth
[B]
jute
[C]
any of the above
[D]
none of the above
46
The current carrying capacity of cables in D.C. is more thanthat in A.C. mainly due to
[A]
absence of harmonics
[B]
non-existence of any stability limit
[C]
smaller dielectric loss
[D]
absence of ripples
Answer: smaller dielectric loss
47
Conduit pipes are normally used to protect _____ cables.
[A]
unsheathed cables
[B]
armoured
[C]
PVC sheathed cables
[D]
all of the above
Answer: unsheathed cables
48
In single core cables armouring is not done to
[A]
avoid excessive sheath losses
[B]
make it flexible
[C]
either of the above
[D]
none of the above
Answer: avoid excessive sheath losses
49
In a cable, the maximum stress under operating conditions is at
[A]
insulation layer
[B]
sheath
[C]
armour
[D]
conductor surface
Answer: conductor surface
50
High tension cables are generally used up to
[A]
11kV
[B]
33kV
[C]
66 kV
[D]
132 kV
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