Engine_2014 : Electricity - 678/2299
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| Before testing insulation with a megohmmeter, the windings of large machines should be grounded for about 15 minutes just prior to the test. Why is this procedure recommended? |
| A) insulation may be damaged |
| B) insulation may be covered with moisture |
| C) armature windings will have a greater number of leakage paths |
| D) larger machines may acquire a charge of static electricity during operation |
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