A.Globe valve
B.Butterfly valve
C.Gate valve
D.Packless valve
您可能感興趣的試卷
你可能感興趣的試題
A.center of gravity
B.metacenter
C.center of flotation
D.keel
A.Carefully and neatly erase the entryand rewrite it correctly
B.Remove this page of the log book and rewrite all entries on a clean page
C.Blot out the error completely and rewrite the entry correctly
D.Cross out the error with a single line and rewrite the entry correctly
A.cross out the error with a single line,and write the correct entry ,then initialit
B.carefully and neatly erase the and rewrite it correctly
C.remove this page of the log book , and rewrite all entries on a clean page
D.Blot out the error completely and rewrite the entry correctly
A.uncorrected KG
B.virtual height of the center of gravity
C.metacenter
D.metacentric height
A.increase holding power
B.decrease holding power
C.make penetration more complete
D.not effect holding power
最新試題
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
In the Northern hemisphere northerly winds may cause temperature（）.
The loading of the ship must be done in accordance with（）.
Which of the following is not an operation mode of AIS?（）
What is it called when it is possible to ignite the vapour above the oil?（）
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
ECDIS must be able to perform all of the following EXCEPT（）.
A tide is called diurnal when（）.
Bales close to the deckhead should be covered to prevent（）.
（）is where the crew eat their meals.