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The packing installed in the pump stuffing box is lubricated

题目
单选题
The packing installed in the pump stuffing box is lubricated by （）.
A

gravity and feed oil cups

B

grease cups

C

hand during installation

D

leakage through the stuffing box

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相似问题和答案

第1题：

“It is declared that this shipment does not contain any wood packing materials。” 与这句话意思接近的是（ ）。
A. We declare that no wood packing material was used in this shipment.
B. No declaration was made whether wood packing materials had been used or not.
C. If you don't make any declaration, we will not use any wood packing material.
D. We will not use any wood packing material since you have provided us a declaration of no wood packing material.


答案：A
解析：

第2题：

营业员对邮件的包装建议语句是（）。

  • A、Please fill in the forms.
  • B、Please change your packing box.
  • C、I suggest you put some cushioning material in it.
  • D、Please complete the forms.

正确答案:B,C

第3题：

营业员对邮件的包装建议语句是()。

A.Please fill in the forms.

B.Please change your packing box.

C.I suggest you put some cushioning material in it.

D.Please complete the forms.


正确答案：BC

第4题：

单选题
A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）.
A

have a greater head capacity

B

operate with increased impeller efficiency

C

discharge through the suction side of the pump casing

D

require more power to run the shaft


正确答案： A
解析： 暂无解析

第5题：

单选题
Shaft sealing in a centrifugal pump can be effected by （）.
A

the mechanical seal

B

packed stuffing boxes

C

either A or B

D

neither A nor B


正确答案： D
解析： 暂无解析

第6题：

byte stuffing字节充填


正确答案: 一种协议技术，数据通过插入附加的字节来区分数据值和包控制域。

第7题：

单选题
If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.
A

excessive drive motor speed

B

excessive pump discharge pressure

C

too low of a tilting box angle

D

insufficient drive motor speed


正确答案： A
解析： 暂无解析

第8题：

Which of the following components provides a direct source of seawater for the fire main system?

A.Rose box

B.Sea chest

C.Sluice(闸式) valve

D.Fire pump stuffing box


正确答案：B

第9题：

单选题
Which of the following components provides a direct source of seawater for the fire main system?（）
A

Rose box

B

Sea chest or spool piece

C

Sluice valve

D

Fire pump stuffing box


正确答案： C
解析： 暂无解析

第10题：

单选题
A full-flow 50μm filter is installed ,（） so the injection system components on the main engine are safeguarded.
A

as close to the main engine as possible

B

as close to the main pump as possible

C

just before the fuel valve

D

just before the booster pump


正确答案： C
解析： 暂无解析

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