海船船员考试

单选题Which of the listed pumps is NOT a positive displacement pump?（）A CentrifugalB ReciprocatingC GearD Rotary

题目
单选题
Which of the listed pumps is NOT a positive displacement pump?（）
A

Centrifugal

B

Reciprocating

C

Gear

D

Rotary

如果没有搜索结果，请直接 联系老师 获取答案。
如果没有搜索结果，请直接 联系老师 获取答案。
相似问题和答案

第1题：

单选题
A screw pump belongs to （） according to its working principle.
A

reciprocating pumps

B

positive displacement pumps

C

centrifugal pumps

D

centripetal pumps


正确答案： B
解析： 暂无解析

第2题：

单选题
Deadweight，which is the cargo carrying capacity of a vessel in tons，is determined by（）.
A

Loaded displacement minus light displacement

B

Gross tonnage minus net tonnage

C

Loaded displacement minus net tonnage

D

Light displacement minus the weight of the vessel


正确答案： C
解析： 暂无解析

第3题：

When the helm is turned on the navigation bridge，which of the listed actions will be the FIRST response in the steering room on a ship equipped with an electro-hydraulic steering gear ________．

A.The pumps go to full stroke

B.The six-way valve aligns itself with the running pump

C.Both port and starboard cables are energized

D.The synchronous receiver turns，duplicating the helm motion


正确答案：D

第4题：

单选题
Gear pumps are （） because they discharge a near constant amount of liquid regardless of pressure.
A

negative displacement type

B

turbine type

C

positive displacement type

D

mixed-flow type


正确答案： C
解析： 暂无解析

第5题：

单选题
The gear, screw, and vane pumps are all classified as （）.
A

variable stroke pumps

B

multistage pumps

C

positive displacement pumps

D

triple-ported pumps


正确答案： D
解析： 暂无解析

第6题：

单选题
Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid （） pressure.
A

depending on

B

in relative to

C

regardless of

D

because of


正确答案： C
解析： 暂无解析

第7题：

单选题
Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）
A

The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump

B

Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight

C

Rotary pumps occupy only one-half the space of reciprocating pumps

D

Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump


正确答案： B
解析： 暂无解析

第8题：

单选题
A positive displacement pump is that where the volume of the pump chamber is alternately increased to （） and then decreased to （）.
A

draw the liquid in；force the liquid out

B

force the liquid out；draw the liquid in

C

suction；draw

D

deliver；outlet


正确答案： C
解析： 暂无解析

第9题：

单选题
Positive displacement, helical gear pumps are well suited for pumping oil because （）
A

stuffing boxes eliminate the leakage problems usually associated with other gear pumps

B

it is not necessary to closely maintain design clearances with this pump

C

they are essentially self-priming and produce a high suction lift

D

these pumps are designed with extreme tooth angled


正确答案： A
解析： 暂无解析

第10题：

单选题
Accidental flooding of the engine room bilges by the bilge main is prevented by （）.
A

stop-check valves installed in the bilge manifolds

B

using a positive displacement reciprocating bilge pump

C

installing eductors in all bilge rose boxes

D

installing a swing check before each bilge valve


正确答案： D
解析： 暂无解析

更多相关问题
相关内容