A.cast iron
B.forged steel
C.stainless steel
D.cast steel
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A.timber or steel rails
B.locomotives or boilers
C.railway passenger coaches
D.motor vehicles
A.reduces and prevents corrosion of standing rigging
B.prevents corrosion of running rigging
C.reduces and prevents wear caused by the rubbing of one object against another
D.protects the body against extreme cold
A.the Coast Guard
B.the ABS
C.the shipyard fire department
D.a certified marine chemist
A.the customs
B.the Register Bureau of shipping
C.the shipyard fire department
D.a certified gas chemist
A.essential
B.important
C.good
D.a better operation
最新試題
The end of the joint with the exterior threads is called the（）.
Prior to burning or welding on a fuel tank on a ship，regulations require that an inspection be made. An entry in the unofficial logbook is required if this inspection is made by（）.
At the same time，it is（）for you to signify your acknowledgement of the responsibility for the collision by signing the copies of this letter hereto attached and to return me two copies in due time.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
Chain slings are suitable for heavy slender articles，such as（）.
Chafing gear（）.
The angle between the flukes and the shank of an anchor is called the（）.
Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure? （）
The boom stops are installed on an offshore crane to（）.
The document on a vessel，annually endorsed by an American Bureau of Shipping surveyor，is called the（）.