[Oil Transport Quiz with Prizes] 81

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This post was last edited by 18 on 2009-9-20 11:08: Multiple-choice questions. 5 questions per day; 2 wealth points for answering one question correctly, and an additional 10 wealth points if all questions are answered correctly. To prevent some members from copying other members’ answers, please hide your posts when answering questions. For specific methods of hiding, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 96. There are many types of sealing rings used in pumps, and in practical applications, ( ) is the most commonly used type. (A) Corner joint type (B) Single-maze type (C) Flat joint type (D) Double-maze type. 97. ( ) Seal rings have a simple structure and are easy to manufacture, but they suffer from high leakage rates, which cause significant shock losses in the fluid flow; therefore, they are only used in pumps with low head. (A) Single labyrinth type (B) Butt joint type (C) Double labyrinth type (D) Corner joint type. 98. A mechanical seal generally has ( ) sealing points. (A)l (B)2 (C)3 (D)4 99. The work done by a pump on a liquid per unit of time is called the pump’s ( ). (A) Flow rate (B) Head (C) Efficiency (D) Power 100. The amount of liquid that a pump discharges per unit of time is called the pump’s ( ). (A) Flow rate (B) Head (C) Efficiency (D) Power Answer key: 96.A 97.C 98.D 99.D 100.A