Pick up the correct statement from the following:
(A) At a particular speed of operation, the head produced decreases with the increase of
discharge
(B) At zero discharge, discharge valve remaining closed, the head developed is maximum which
is known as shut-off head
(C) At a particular speed the discharge at which efficiency of a pump is maximum, is known as
normal discharge
(D) All the above
(A) At a particular speed of operation, the head produced decreases with the increase of
discharge
(B) At zero discharge, discharge valve remaining closed, the head developed is maximum which
is known as shut-off head
(C) At a particular speed the discharge at which efficiency of a pump is maximum, is known as
normal discharge
(D) All the above