Engine : Electricity - 1014/1386
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| When testing insulation resistance of electric equipment and machinery, ideally when should the insulation resistance be tested for the lowest normal insulation values? |
| A) every time the brush rigging is adjusted |
| B) every 30 days whether the machine is in use or not |
| C) immediately after starting up the machine |
| D) immediately after shutting down the machine |
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