Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?（）<br /> (1) Its discharge is continuous<br /> (2) It has no internal valves<br /> (3) Upon accidental closing of discharge valve, excessive pressure will not build up..

第1题

A、A.（1）and（2） B、B.（1）and（3） C、C.（2）and（3） D、D.（1），（2）and（3）

第2题

A、A.(1) only B、B.(2) only C、C.(1) and (2) D、D.(1), (2) and (3)

第3题

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

第4题

第5题

A、Height of the machine B、Temperature of the liquid seal C、Gravity disc D、Bowl diameter

第6题

A、Height of the machine B、Temperature of the liquid seal C、Gravity disc D、Bowl diameter

第7题

A、bearing knocks B、dropping of pressure of LO C、noises D、all the above

第8题

A、bearing knocks B、dropping of pressure of LO C、noises D、all the above

第9题

A、the peak pressure in a cylinder B、the temperature of the cooling water C、the fuel consumption D、none of the above

第10题

A、the peak pressure in a cylinder B、the temperature of the cooling water C、the fuel consumption D、none of the above

Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?（）<br /> (1) Its discharge is continuous<br /> (2) It has no internal valves<br /> (3) Upon accidental closing of discharge valve, excessive pressure will not build up