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 angle at which the anchor flukes penetrate the soil is the（）.
Please arrange（）a surveyor to inspect the damaged bulkhead．
In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead（）.
The conclusion is（）the said ship is fit to continue to sail.
Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
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（）.
Chafing gear（）.
Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.
The anchors on the bow are known as（）.
The bottom of the mast rests on a part of the keel called the mast（）.