The function of a centrifugal pump double volute casing is to （）.<br>A:reduce radial thrust to the impeller<br>B:double the liquid velocity through the pump when compared to a single volute<br>C:reduce hydraulic end thrust<br>D:provide the effect of multi-staging

The function of a centrifugal pump double volute casing is to （）.
A:reduce radial thrust to the impeller
B:double the liquid velocity through the pump when compared to a single volute
C:reduce hydraulic end thrust
D:provide the effect of multi-staging

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