The material commonly used for sheaths of underground cables is
A) lead
B) rubber
C) copper
D) iron
Correct Answer:
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Q8: The power factor of industrial loads is
Q9: Overhead lines generally use
A)copper conductors
B)all aluminium conductors
C)A.C.S.R.
Q10: In transmission lines the cross-arms are made
Q11: The material generally used for armour of
Q12: Transmission line insulators are made of
A)glass
B)porcelain
C)iron
D)P.V.C.
Q14: The minimum clearance between the ground and
Q15: The spacing between phase conductors of a
Q16: Large industrial consumers are supplied electrical energy
Q17: In a D.C. 3-wire distribution system, balancer
Q18: In a D.C. 3-wire distributor using balancers
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