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Engine : Electricity - 1041/1386
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With regard to the maintenance of electrical generating machines with insulated pedestal bearings, what practice should be avoided?
A) touching the bearing shell while the machine running
B) painting or allowing grease build up on the insulated area
C) using a megohm meter with the machine disassembled to determine insulation values
D) cleaning and removing grease from the insulated area
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