NEIEP Generator Maintenance and Repair (440) Practice Test

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A sleeve bearing wears quietly and allows the armature to _____, reducing clearances.

Rise up

Drop down

Worn sleeve bearings allow axial play of the shaft, so the rotor can sag or drop along the axis. When the armature drops, it moves closer to the stator, reducing the clearance between them. That decreased clearance is what the question describes. Rise up would increase clearance, shifting sideways would imply lateral misalignment, and rotation is a normal part of operation, not a result of the wear pattern described.

Shift sideways

Rotate

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