Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 375
^ Fig.111. Assuming the diameters of the dischargeand suction pipes equal, the velocity headsin these pipes will be equal. Then, sincethe energy WD added by the pump to thewater equals the difference in energies onthe discharge and suction sides (note thatPs is a negative pressure, counting… … Fig. IIL—Measure-ment of Head. which relation is to be used when thesuction pipe pressure is read with a vac-uum gage. Similarly, D = 23P,+d + lA3h, .... (2) which is the appropriate relation when a mercurj^ manometer isemployed. 70 MISCELLANEOUS TESTS 355 If the level of the water supplied is…
Mechanical engineering laboratories
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