Two pumps can operate independently at heads H1, H2 and discharge Q1, Q2 respectively. If the pumps are connected in parallel, then what are the resulting discharge (Q) and head (H)?
(a) Q = Q1 + Q2, H= H1 + H2
(b) Q = Q1 – Q2, H = H1 – H2
(c) Q = Q1 = Q2, H= H1 = H2
(d) Q = Q1 + Q2, H = H1 = H2