Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 317
LECTRIC PUMPS 2,971 Ques. Why must the lift be reduced as the tempera-ture of the water is increased? Ans. Because the boiling point of water corresponds to thepressure. Theoretically a perfect pump will draw water from a height of 34 ft.when the barometer reads 30 ins., but since a perfect vacuum… … Fig, 4 246.—Hydraulic principles: 3. The pressure exerted by a liquid on a surface is pro-portional to the area of the surface. Two cylinders of different diameter are joined by atube and filled with water. On the surface of the two pistons M and S, which hermeticallyclose the cylinders, but move…
Electrical engineering
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