For previous part, check the previous post.
51. It is difficult to maintain oil filled cables.
(a) Yes
(b) No
Ans: a
51. In capacitance grading a homogeneous dielectric is used.
(a) Yes
(b) No
Ans: b
52. In congested areas where excavation is expensive and inconvenient 'draw in system' of laying of underground cables is often adopted.
(a) Yes
(b) No
Ans: a
53. Natural rubber is obtained from milky sap of tropical trees.
(a) Yes
(b) No
Ans: a
54. Rubber is most commonly used insulation in cables.
(a) Yes
(b) No
Ans: a
55. Polyethylene has very poor dielectric and ageing properties.
(a) Yes
(b) No
Ans: b
56. The metallic sheath may be made of lead or lead alloy or of aluminium.
(a) Yes
(b) No
Ans: b
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