a) Increasing the number of strings in the insulator b) Increasing ratio, capacity to earth/capacity per insulator c) Correct grading of the various capacitances d) Reducing the number of strings
Ans: C
a) 30 KV per meter b) 21.1 KV r.m.s. per cm c) 21.1 KV r.m.s. per cm d) 21.1 KV per cm
Ans: B
a) At disruptive critical voltage b) At visual critical voltage which is higher than disruptive critical voltage c) At lower voltage than disruptive critical voltage d) None of the above
Ans: B
a) true b) false
Ans: A
a) true b) false
Ans: B
a) 22 kV b) 11 kV c) 44 kV d) 33 kV
Ans: D
a) Prevent the moisture from entering the cable b) Provide the strength to the cable c) Avoid the chances of the rust on the stands d) Provide proper insulation
Ans: A
a) The pressure of oil or gas will avoid the formation of the voids b) The pressure will provide the strength to the cable c) The pressure will enable the cable to withstand the high voltage d) The gas and oil at high pressure will work as insulator
Ans: A
a) At the surface of the sheath b) At the surface of the conductor c) At the surface of the insulator d) At the surface of the armouring
Ans: B
a) To provide the uniform stress distribution b) To avoid the requirement of the good insulation c) To minimize the stress d) To avoid moisture
Ans: A