A.squaring the corners
B.rounding the corners
C.plug welding the corners
D.slot welding the corners
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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
A.the customs
B.the Register Bureau of shipping
C.the shipyard fire department
D.a certified gas chemist
最新試題
The anchors on the bow are known as（）.
The boom stops are installed on an offshore crane to（）.
At（）an occasional survey has been carried out．
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.
Before welding in a tank that has carried petroleum products，the tank must be certified by （）.
The annual survey for endorsement of a Load Line Certificate must be held within（）.
At least one reinspection shall be made on each vessel holding a Certificate of Inspection valid for two years. This inspection shall be held between the tenth and fourteenth months of the duration period of the certificate and shall be（）.
Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
In the ship construction portfolio，materials which do not conform to ASTM or ABS specifications must also include the（）.
Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.