Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part2 : 21 to 25
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
21.Which of the following is the least expensive protection for overcurrent is low voltage system ? |
| Rewireable fuse |
| Isolator |
| Oil circuit breaker |
| Air break circuit breaker |
22.To protect most of the electrical equipment handling low power, the types of relays used are |
| thermocouple |
| electronic and bimetallic |
| both (a) and (b) |
| none of the above |
23.Protective relays are devices that detect abnormal conditions in electrical circuits by measuring |
| current during abnormal condition |
| voltage during abnormal condition |
| constantly the electrical quantities which differ during normal and abnormal conditions |
| none of the above |
24.Ungrounded neutral transmission system is not recommended because of system |
| insulation being overstressed due to pver voltages |
| insulation overstress may lead to failure and subsequent phase to phase faults |
| being inadequately protected against ground fault |
| all of the above |
More Switchgear Protections QUESTIONS AND ANSWERS available in next pages
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