Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part2 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.Large internal faults are protected by |
| merz price percentage differential protection |
| mho and ohm relays |
| horn gaps and temperature relays |
| earth fault and positive sequence relays |
7.Ionization in circuit breaker is facilitated by |
| high temperature |
| increase of mean free path |
| increasing field strength |
| all of the above |
8.The ground wire should not be smaller than No ______ copper. |
| 2 |
| 4 |
| 6 |
| 10 |
9.The interaction between a transmission line and communication line js minimized by |
| transposing transmission as well as communication lines |
| increasing the height of the trans-mission line tower |
| increasing the distance between the two lines |
| all of the above |
10.Overheating of relay contacts or contact born out is due to |
| slow making and breaking of load circuit contacts |
| foreign matter on the contact surface |
| too low contact pressure |
| all of the above |
More Switchgear Protections QUESTIONS AND ANSWERS available in next pages
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