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
Chafing gear（）.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
Chain slings are suitable for heavy slender articles，such as（）.
I saw the cargo surveyor（）the cargo on deck just a minute ago．
The above mentioned ship has been duly（）in accordance with the provisions of the convention referred to.
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（）.
The boom stops are installed on an offshore crane to（）.
Tensile stress is a result of two forces acting in（）.
Please arrange the survey（）early．
The annual survey for endorsement of a Load Line Certificate must be held within（）.