(d) Data measured during tests of a centrifugal pump at 5500 rpm are given in TABLE Q4(d). Temperature of water is 32°C

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D Data Measured During Tests Of A Centrifugal Pump At 5500 Rpm Are Given In Table Q4 D Temperature Of Water Is 32 C 1 (28.54 KiB) Viewed 35 times

(d) Data measured during tests of a centrifugal pump at 5500 rpm are given in TABLE Q4(d). Temperature of water is 32°C (see TABLE Q4) and flow rate is 220 L/min. Torque applied to pump shaft is 4.78 Nm. Evaluate total heads at pump inlet and outlet, hydraulic power input to fluid, and pump efficiency. Temperature Density T(°C) p(kg/m³) 0 1000 10 20 30 40 50 60 70 80 90 100 Parameter Gage pressure p (kPa) Elevation above datum z (m) Velocity of flow (m/s) 1000 998 996 992 988 984 978 TABLE Q4 (d) 971 965 958 Inlet section Outlet section TABLE Q4 Specific weight 7(N/m²) 9810 9810 9790 9770 9730 9690 9650 9590 74.7 2.49 3.13 Dynamic viscosity (Ns/m²) 1.75 x 10 1.30 x 10³ 1.02 x 10 8.00 x 10 6.51 x 10 5.41 x 10 4.60 x 10 4.02 x 10* 3.50 x 10 3.11 x 10 2.82 x 10 553.1 4.36 5.23 9530 9470 9400 *In contact with air (6 marks) Surface tension a(N/m) 0.0756 0.0742 0.0728 0.0712 0.0696 0.0679 0.0662 0.0644 0.0626 0.0608 0.0589