Engine : Electricity - 404/1386
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| In a three-phase electrical system, three ground detecting lamps are provided. One lamp goes dark and the others increase in brightness when the "ground test" button is pushed. What is indicated? |
| A) there is a ground on the line with the dark lamp |
| B) this is a normal condition |
| C) the dark lamp must be replaced |
| D) there are grounds on the lines with the bright lamps |
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| Comments |
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| captchief - 2021-08-18 20:56:31 Member (1) |
| I agree. Question is not correct. |
| jcpalmersc - 2016-03-27 14:23:21 Member (1) |
| I agree with KARESTIVO; the test button should test the lamp operation not test the circuit for grounds |
| karestivo - 2015-05-05 18:12:05 Member (2) |
| when the test button is pressed all three lights should shine brightly, if the bulbs are in good working order. when released a dark lamp, with an operational bulb, will signify a ground on that line. |
| karestivo - 2015-05-05 18:11:08 Member (2) |
| I believe this question is incorrect |