If the pump is operated at the best efficiency point $($i$.$e$.,$ discharge rate $=0\mathrm{.}03$ m$^3/$s$,$efficiency $=72\%,$ pump head developed is H $=8\mathrm{.}5$ m$),$ the NPSH required is $6$ m$,$

where will the pump need to be placed relative to the sump surface $($find Hupper the

upper limit of the position above the sump surface and Hlower the lower limit of the

position below the sump surface$)?$ In answering this sub$-$question $($and only on this

sub$-$question$),$ the pipe friction loss can be simply assumed to be $0\mathrm{.}1$ m per $1$ m of

the pipe