railway RRB JE (CBT I + CBT II) Mock Test 2024 Power Systems Transmission and Distribution Overhead Insulators
Consider the following statements:
In case of suspension – type insulators, the string efficiency can be improved by
(1) Using a long cross - arm
(2) Using a guard ring
(3) Grading the insulator discs.
(4) Reducing the cross – arm length
Which of the above statements are correct.
1
1, 2, 3
2
2, 3
3
2, 4
4
1, 3