海船船员考试
单选题Operating a rotary pump at speeds in excess of design requirements could cause（）.A decreased clearances between rotating partsB decreased slippage to the suction side of the pumpC air binding in the discharge portsD erosion and excessive wear
题目
decreased clearances between rotating parts
decreased slippage to the suction side of the pump
air binding in the discharge ports
erosion and excessive wear
相似问题和答案
第1题：
An increase in rotor clearances in a rotary pump will ______.
A.increase discharge pressure
B.decrease pump capacity
C.decrease pump cavitation
D.decrease reaction ring clearance
第2题：
Which method should be used to warm up the pump turbines prior to discharge ________．
A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B.Run the pump at high speed with the discharge valves closed
C.Run the turbine at slow speed with the pump disconnected
D.Shut the discharge valve and run the pump at slow speed
第3题：
A.plan
B.requirement
C.implementation
D.design
在当今使用的大部分操作系统中，包括所有的用户系统，都含有TCP/IP实现。
第4题：
worn gland sealing shaft
worn wearing rings
a bent shaft
reversed pump coupling
第5题：
Most Computer operating systems in use today, including all consumer-targeted systems, include a TCP/IP（）.
- A、plan
- B、requirement
- C、implementation
- D、design
正确答案:C
第6题：
If the suction pressure for an operating refrigeration compressor is below normal, the cause may be ______.
A.an excess of liquid refrigerant
B.the expansion valve overfeeding
C.a fouled compressor suction strainer
D.the compressor short cycling
第7题：
Which pump must always be primed ________．
A.Centrifugal pump
B.Reciprocating pump
C.Rotary pump
D.All of the above
第8题：
The vehicle was traveling at speeds______90 miles per hour.
A．in addition to
B．in view of
C．in excess of
D．in search of
解析：句意：汽车正在以超过每小时90公里的速度前行。本题考查介词短语的辨析。in addition to 除……之外；in view of鉴于，由于；in excess of超过；in search of寻找。
第9题：
You need to recommend a configuration design for the new VMs. The design must ensure that operating systems can be deployed to the new VMs. What should you include in the recommendation？（）
- A、virtual machine queue （VMQ）
- B、Virtual Machine Chimney
- C、a synthetic network adapter
- D、an emulated network adapter
正确答案:D
第10题：
only by the pump as its primary function
by resistance to the fluid flow through the system
by the thermal input to the systems fluid
solely by the charge applied by the accumulators