ข้อสอบสามัญเครื่องกล Pump 1/2548

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  • 8/14/2019 Pump 1/2548

    1/4

    1 5 (Pump / Fan / Compressor) 1/2548

    6 5 20 1. 100 (Pump Head) 100 75 kW(100) 380/3/50 1470 ? (20 )

    2. (Centrifugal Fan) 10 (Pump Head)100 NPSHR (Net Positive Suction Head required) 3 80OC 3 4 10 ? (20 )

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    2/4

    2 5 (Pump / Fan / Compressor) 1/2548

    3. (Centrifugal Fan) (Pulley) () 20 . () 40 . 25 . ? ? (20 )

    4.(Centrifugal Fan)

    2 (Fan Total Efficiency / FanMechanical Efficiency) (Fan Static Effiency)

    60% 50% (StaticPressure) 500 Pa () (20 )

  • 8/14/2019 Pump 1/2548

    3/4

    3 5 (Pump / Fan / Compressor) 1/2548

    5.(Air Compressor) (101kPa) 5 (808 kPa) (20 )

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    4

    5 (Pump / Fan / Compressor) 1/2548

    6.(Air Compressor)()(IsentropicPower) (Brake/Shaft Power) (IsentropicEfficiency)

    70% 0.2 100 kPa 800 kPa

    kW () (20 )