A.to windward should be opened and the ones to leeward should be closed
B.to leeward should be opened and the ones to windward should be closed
C.should be opened
D.should be closed
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A.squaring the corners
B.rounding the corners
C.plug welding the corners
D.slot welding the corners
A.cast iron
B.forged steel
C.stainless steel
D.cast steel
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
最新試題
The lines led forward from the bow and aft from the stern when a vessel is moored to the dock are（）.
The bottom of the mast rests on a part of the keel called the mast（）.
Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.
The annual survey for endorsement of a Load Line Certificate must be held within（）.
Hatch No.1 must be cleaned up to meet the（）of the cargo surveyors．
The conclusion is（）the said ship is fit to continue to sail.
In the ship construction portfolio，materials which do not conform to ASTM or ABS specifications must also include 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（）.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
Tensile stress is a result of two forces acting in（）.