题目内容

There are three main states of flow, such as laminar,_________and turbulence in a pipe.

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When a continuity viscous fluid flows through a variable section, fluid will lose parts of energy.This can be presented by the pressure loss h_w. The h_w includes two parts: pressure losses along parallel pipes and_________losses.

The absolute pressure of a hydraulic pump inlet is 0.07MPa, so the vacuum degree of the inlet is MPa, and the gauge pressure is MPa. (The Atmospheric pressure is 0.1MPa)

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A. solid
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D. insulator

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