question_answer

  A centrifugal blower delivering \[\text{Q}{{\text{m}}^{\text{3}}}\text{/s}\] against a head of H m is driven at half the original speed. The new head and discharge would be:

A) \[H\,and\,Q/2\]              

B) \[\frac{H}{4}\,and\,\frac{Q}{2}\]

C) \[\frac{H}{2}\,and\,\frac{Q}{8}\]                       

D) \[H\,and\,\frac{Q}{4}\]