One Question per Day on Refining Knowledge (Technology) 110213
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We welcome everyone to actively participate in the learning and discussion of professional basic knowledge in the refining technology exchange area! In accordance with the forum’s unified requirements, the maximum score for this event is 5 Wealth points, and it is prohibited to assign charm scores. Friendship requests and duplicate ratings are also declined. Be careful when posting; editing is ineffective. Those who have different opinions on the provided answer keys can post discussions the next day; those who provide solutions or their own opinions regarding the daily question’s answer key will receive appropriate rewards! The focus is on participation, and there are prizes for it! 1. Centrifugal pumps are suitable for ＿＿ liquids ； A. High flow rate, low head B. Low flow rate, high head C. Low flow rate, low head 2. Centrifugal pumps rely mainly on ＿＿ to draw in the liquid medium: A. Pressure B. Pressure difference C. Head 3. The characteristic curve of a piping system is a ＿＿. A. Straight line B. Irregular curve C. Parabola 4. The one that is prone to cavitation is ＿＿＿＿. A. Vortex pump B. Reciprocating pump C. Centrifugal pump 5. The pump for which the outlet valve must be closed before startup and used to regulate flow is ＿＿＿＿. A. Reciprocating pump B. Centrifugal pump C. Vortex pump A ； B ； C ； C ； B
This post was last edited by cjzhou2 on 2011-2-13 11:05: A B C C B
Reply 1# fengdingwen ABCCB
1. Centrifugal pumps are suitable for ＿A＿ liquids； A. High flow rate, low head B. Low flow rate, high head C. Low flow rate, low head 2. Centrifugal pumps rely mainly on ＿B＿ to draw in the liquid medium: A. Pressure B. Pressure difference C. Head 3. The characteristic curve of a piping system is a ＿C＿. A. Straight line B. Irregular curve C. Parabola 4. The condition that prone to cavitation is ＿＿C＿＿. A. Vortex pump B. Reciprocating pump C. Centrifugal pump 5. The pump for which the outlet valve must be closed before startup and used to regulate flow is ＿＿B＿＿. A. Reciprocating pump $ x1 `5 V3 c8 F! x B. Centrifugal pump 3 c' c# t Z% n/ T( w- I- K9 M C. Vortex pump
1、A； 2. B ； 3、C ； 4、C ； 5. B.
Reply 1# fengdingwen 1. Centrifugal pumps are suitable for ＿A＿ liquids； A. High flow rate, low head B. Low flow rate, high head C. Low flow rate, low head 2. Centrifugal pumps rely mainly on ＿B＿ to draw in the liquid medium: A. Pressure B. Pressure difference C. Head 3. The characteristic curve of a piping system is a ＿C＿. A. Straight line B. Irregular curve C. Parabola 4. The condition that prone to cavitation is ＿＿C＿＿. A. Vortex pump B. Reciprocating pump C. Centrifugal pump 5. The pump for which the outlet valve must be closed before startup and used to regulate flow is ＿＿B＿＿. A. Reciprocating pump # h3 y8 X0 J% u B. Centrifugal pump. P1 M: }. k( J/ l% K(