The purpose of the wearing rings used in a centrifugal pump is to （）.<br>A:prevent an internal explosion in the pump when it is overheated<br>B:enable a visual inspection of the pump while it is running<br>C:insure a proper alignment of the pump coupling to the driver<br>D:accommodate for friction between the impeller and the easing

The purpose of the wearing rings used in a centrifugal pump is to （）.
A:prevent an internal explosion in the pump when it is overheated
B:enable a visual inspection of the pump while it is running
C:insure a proper alignment of the pump coupling to the driver
D:accommodate for friction between the impeller and the easing

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