1. When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will A. Increases B. Decreases C. Remains unaffected D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
2. Moisture content in the soil _______ the earth soil resistance A. increase B. decrease C. does not affect D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
3. Generally grounding is provided for A. only for the safety of the equipment B. only for the safety of the operating personnel C. both (A) and (B) D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
4. Ground resistance should be designed such that A. grounding resistance should be as low as possible B. grounding resistance should be as high as possible C. grounding resistance should be always zero D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
5. For an EHV equipment for maintenance first it should be isolated and connected to ground because A. to provide low impedance B. to discharge the charging capacitance to ground C. protection for operating personnel D. both (B) and (C) Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
6. The objective of earthing or grounding is A. to provide as low resistance possible to the ground B. to provide as high resistance possible to the ground C. to provide flow of positive, negative and zero sequence currents D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
7. Factors on which soil resistance depends A. depth of the electrode B. moisture C. Nacl D. all the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
8. When earth fault occurs A. voltage potential at the earth mat increases due to grounding B. voltage potential at the earth mat decreases due to grounding C. voltage potential at the earth mat remains zero irrespective of fault D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
9. Average resistance of human body is A. 500 ohms B. 1000 ohms C. 1500 ohms D. 2000 ohms Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
10. Earth wire or ground wire is made of A. copper B. aluminium C. iron D. galvanized steel Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
