The purpose of the wearing rings used in a centrifugal pump is to （）.

相似题目

• What’s the purpose of the program?

  A . To keep all the members in the group work together． B . To make the people there understand the meaning of work． C . To find a way to solve the generation gap． D . To help people enjoy their work．

  查看最佳答案

• Which of the following item is the cause to the damage of parts and excess wearing?（）

  A . overload B . the odds of the load C . the default of parts D . overload and the odds of the load

  查看最佳答案

• The purpose of the flywheel of a diesel engine is to （）.

  A . counterbalance the crank throws on the crankshaft B . keep the engine running smoothly between power stroke C . provide a belt-driving surface for the operation of auxiliary machinery D . prevent the engine from overspeeding

  查看最佳答案

• What is the purpose of the until change option of the restore command？（）  

  A .  It allows you to select the SCN that you want to restore to. B .  It allows you to select the log sequence number you want to restore to. C .  It allows you to select the timestamp you want to restore to. D .  It allows you to manually stop the restore at any time as online redo logs are applied. E .  None of the above.

  查看最佳答案

• Which of the following operation will have a direct impact on the rate of wear in a cylinder liner （）

  A . amount of scavenge air to the cylinder B . quality of fuel injected C . viscosity of the lube oil D . compression ratio of the pisto

  查看最佳答案

• The rate of wear on a cylinder liner depends on the （）

  A . quality of air filtration B . effectiveness of lubrication C . type of fuel used D . all of the above

  查看最佳答案

• Wear occurring at the tips of the reduction gear teeth is usually the result of （）.

  A . surface fatigue B . fretting corrosion C . heavy overloading D . gear misalignment

  查看最佳答案

• The purpose of the flywheel is to （）

  A . provide energy to operate the engine between power impulses B . neutralize the primary inertia force of the crankshaft C . reduce the shock of starting loads on the main bearings D . prevent the engine from operating at critical speed

  查看最佳答案

• The most important factor that causes the wear of the engine parts is （）.

  A . excessive heat B . friction C . oxidation D . high pressure

  查看最佳答案

• Which of the following is the way of expressing purpose?

  查看最佳答案

• Through the interesting procedure of Enamel Filling, the cloisonné wears a colored wrap.

  查看最佳答案

• What is the Chinese meaning of “Constant dripping wears away the stone.”A.B.C.

  查看最佳答案

• Which of the following are the purposes of punishment?

  查看最佳答案

• 1. What is the Chinese meaning of “Constant dripping wears away the stone.”

  查看最佳答案

• The purpose of argumentation is to inform and the purpose of exposition is to persuade.

  查看最佳答案

• What is the purpose of the event？

  A．To welcome health care professionals B．To promote certain health services C．To discuss health workforce shortages D．To promote careers in health care

  查看最佳答案

• What's the purpose of the program？

  A．To keep all the members in the group work together. B．To make the people there understand the meaning of work. C．To find a way to solve the generation gap. D．To help people enjoy their work.

  查看最佳答案

• The main purpose of the passage is

  A. to describe how American children spend their summer. B. to explain the needs of the modern working families. C. to discuss the problems of the current school calendar. D. to persuade parents to stay at home to look after their kids.

  查看最佳答案

• What is the purpose of the text（）

  A．To compare guided tours B．To discover new places of interest C．To introduce a book series D．To show ways of writing for children

  查看最佳答案

• What is the purpose of the passage？

  A．To invite people to take a breath in the Bay of Naples. B．To advise people to telephone Newmarket Air Holidays Ltd. C．To persuade people to tour in the area of the Mediterranean Sea. D．To attract people to go to Sant' Agata or Sorrento for sightseeing.

  查看最佳答案

• Whats the purpose of the talk？

  A．To interest students in a career in counseling. B．To recruit counselors to work in the placement office. C．To inform. students of a university program. D．To convince local merchants to hire college students.

  查看最佳答案

• What is the purpose of the information？

  A．To publicize a community event B．To solicit donations for a special cause C．To ask for public feedback on a proposal D．To announce a program change

  查看最佳答案

• What is the purpose of the passage（）

  A．To advise that TV should be used for educational purpose B．To describe the harmful effects of TV on children C．To explain traditional views of influences that TV has had on children D．To suggest that television cannot be blamed for problems it doesn't cause

  查看最佳答案

• The purpose of the text is to（）

  A．tell what the family do for Thanksgiving Day B．tell how the family spend Thanksgiving Day C．introduce foods served on Thanksgiving Day D．introduce the American Thanksgiving Day

  查看最佳答案