Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part2 : 1 to 5
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.H.R.C. fuses provide best protection against |
| overload |
| reverse current |
| open-circuits |
| short-circuits |
2.Resistance grounding is used for voltage between |
| 33kVto66kV |
| HkVto33kV |
| 3.3kVandllkV |
| none of the above |
3.The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to |
| lubricate the contacts |
| insulate the contacts from switch body |
| extinguish the arc |
| all of the above |
4.The voltage appearing across the contacts after opening of the circuit breaker is called______voltage. |
| recovery |
| surge |
| operating |
| arc |
5.For the protection of power station buildings against direct strokes the requirements are |
| interception |
| interception and conduction |
| interception, conduction and dis-sipation |
| interception, conduction, dissipation and reflection |
More Switchgear Protections QUESTIONS AND ANSWERS available in next pages
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