If power P available from a hydro-scheme is given by the formula P = 9.81 QH, where Q is the flow rate through the turbine in l/s and H is the head in metres, then P will be in units of,
- A. W
- B. HP
- C. kJ/s
- D. kWh
Answer: A. W
Explanation: Power from hydro formula P = 9.81 Q H gives power in W (or kW with appropriate density units; official key marks W).