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The（）enables water to be blow down or emptied from the boile

题目
单选题
The（）enables water to be blow down or emptied from the boilerIt may be used when partially or completely emptying the boiler.
A

main stem stop valve

B

auxiliary steam stop valve

C

feed check or control valve

D

blow down valve

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相似问题和答案

第1题：

Topside area from deep loadline to bulwark to be thoroughly washed down with ______．

A.highly pressure fresh water

B.high pressured fresh water

C.highly pressured fresh water

D.high pressure fresh water


正确答案：D

第2题：

共用题干
Obtaining Drinking Water from Air Humidity

Not a plant to be seen,the desert ground is too dry.But the air contains water,and research scientists
have found a. __________
(51)of obtaining drinking water from air humidity."The process we have
developed is based exclusively on renewable energy sources_________(52)thermal solar collectors and
photovoltaic（光电的）cells , ________( 53 ) makes this method completely energy-autonomous. It will
____________( 54 ) function in regions where there is no electrical infrastructure（基础设施）,"says Siegfried
Egner,head of the research team. The principle of the_________(55)is as follows:hygroscopic（吸湿的）
brine（盐水）一saline（含盐的）solution which absorbs moisture一runs down a tower-shaped unit and absorbs
water from the air. It is then sucked__________(56)a tank a few meters off the ground in which a vacuum
prevails.Energy from solar collectors_________(57)up the brine,which is diluted by the water it has
__________ (58).
Because of the vacuum,the boiling point of the liquid is lower than it would be under__________(59)
atmospheric pressure. The evaporated (蒸发的）, non-saline water is condensed and runs down through a
completely filled tube in a controlled manner. The gravity of this water column_______(60)produces the
vacuum and so a vacuum pump is not needed.The reconcentrated brine________(61)down the tower
surface again to absorb moisture from the air.
"The concept is suitable for various water________(62).Single一person units and plants
supplying water to entire hotels are conceivable,"says Egner. Prototypes have been built for_______
(63)system components一air moisture absorption and vacuum evaporation一and the research scientists
have already __________(64)their interplay on a laboratory scale.In a further ________(65)the re-
searchers intend to develop a demonstration facility.

_________(51)
A:road
B:channel
C:way
D:path

答案：C
解析：
根据上下文可知“科研人员发现了一种从空气里的水分中获取饮用水的方法”，所以 选C。
such as表示“比如”，用于列举。
此处为非限制性定词从句，所以用which。
根据上文“这使得该方法在能量方面完全自主”可知，这里指“即使在没有电力基础设 施的地方仍可起到作用”，所以选D。
根据上下文可知“这套工序的原理如下”，所以选B。
suck into表示“吸入”。
根据上下文可知这里指“来自太阳能收集器的能量将盐水加热”。
absorb表示“吸收”，这里指稀释所吸收的水。
normal“正常的”，这里指“在真空环境中，液体的沸点要比在正常大气压下低。”
continuously“不间断地”;suddenly“突然地”;typically“典型地”;senously“严重地”。根据上下文可知，这里指“水柱的重力持续制造真空状态，所以不需要真空泵”。
run原意为“跑”，但这里是“流动”的意思，run down“沿着······流动”。根据上下文可知“二次浓缩的盐水会沿着塔状物再次向下流去吸收空气中的水”，所以选D。
根据上下文可知“这一理念适用于各种各样的水的使用者”，所以选A。
both"（两者）都”；因为这里是强调空气水汽吸收器和真空蒸汽机两个机器之间的作用 效果，所以选A。
这里指“科研人员已经在实验室里测试了它们相互作用的效果”，所以选C。
step“步骤”;instrument“工具”;case“案例”;ground“地面”。根据上下文可知“在下一步 的研究中，研究者会开发出一套用于展示的设备”，所以选B。

第3题：

The thins brought down by rivers from the mountains that are useful for cultivation are______.

A. deltas

B. crops

C. fresh water life

D. soil and minerals


正确答案：D
55．答案为D  此题为细节题。文章中的第六段第一句：Rivers also bring down soil and minerals from the mountains说明了河流从山上带来的是；土壤和矿物质。答案为D。

第4题：

单选题
An inflatable liferaft is thrown into the water from a sinking vessel. What occurs automatically after the painter trips the CO2 bottles to inflate the raft?（）
A

The sea anchor deploys

B

The floor inflates

C

If upside down，the craft rights itself

D

The painter detaches from the raft


正确答案： D
解析： 暂无解析

第5题：

单选题
A shallow dish positioned at the normal water level is connected to the（）This enables the blowing down or removal of scum and impurities from the water surface.
A

main stern stop valve

B

auxiliary steam stop valve

C

scum valve

D

blow down valve


正确答案： B
解析： 暂无解析

第6题：

An inflatable life raft is thrown into the water from a sinking vessel. What occurs automatically after the painter trips the CO2 bottles to inflate the raft?______.

A.The sea anchor deploys

B.The floor inflates

C.If upside down, the craft rights itself

D.The painter detaches from the raft


正确答案：A
气胀式救生筏自沉船上抛入水中。在系艇索松开救生筏的CO2瓶口时自动发生了什么？海锚被打开

第7题：

Node Manager is a WebLogic Server （） that enables you to start， shut down， and restart Administration Server and Managed Server from a remote location.

  • A、 Instance
  • B、 Utility
  • C、 Destination
  • D、 Ouster

正确答案:B

第8题：

The fresh air intake of the inert gas system ______，

A.Prevents the flue gas from falling below 3% content of oxygen

B.Allows the inert gas piping to be used for gas freeing the tanks

C.Opens when there is excessive vacuum on the deck water seal

D.Enables outside air to mix with and cool hot flue gasses


正确答案：B

第9题：

单选题
Node Manager is a WebLogic Server （） that enables you to start， shut down， and restart Administration Server and Managed Server from a remote location.
A

 Instance

B

 Utility

C

 Destination

D

 Ouster


正确答案： B
解析： 暂无解析

第10题：

单选题
While maneuvering, you discover heavy smoke coming from the turbocharger casing, you should （）
A

check the air filter for dirt

B

check for an exhaust leak

C

check the cooling water temperature

D

notify the bridge that you are going to shut the engine down


正确答案： A
解析： 暂无解析

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