PROCEDURES

Preliminaries

 

               i.      We were being adequately supervised.

             ii.      The pump discharge valve and suction valves is turned to fully open and motor speed being controlled control to zero.

            iii.      The electrical supply and motor drive switch is turned. Motor control knob being slowly adjusted to around half way position. Any possible leaks in the system being checked as well as all gauges etc. The motor speed being reduced back to zero. The apparatus is ready for tested.

 

 

Actual Experiment

               i.      The suction valve is opened and discharge valve being closed. Maximum pump speed N1 is taken by adjusting speed control to 100%.

             ii.      Discharge valve is fully opened and water is allowed to circulate. Note the volume of the flow indicated and suitable increments in flow is decided to give adequate sample point (about 10 points from zero until maximum flow).

            iii.      The discharge valve being closed (corresponding to no flow). All the measurements being taken when the measured readings are steady.

           iv.       To give the first increment in volume flow, the discharge valve being opened slightly. Measurements being taken when readings are steady.

             v.      Step (iv) is repeated. When the valve being fully open consider it as the final measurement.

           vi.      The entire experiment being repeated at pump speed correspond to speed control position of 75% and 50%.