单选题The purpose of sheer in ship construction is to（）.A allow the ship to ride waves with drier decksB eliminate the need for butt strapsC eliminate the need for margin platesD give greater strength at the deck edge

A claim for cargo damages may be held against the shipowner if such damage is the result of failure of the ship's officers to ______.

A.ensure the fitness and safety of cargo spaces

B.ensure adequate packaging of the cargo

C.prevent delays due to quarantine restrictions

D.correct all defects in the ship's construction

A ship under construction or major repair will acquire permanent magnetism due to ______ while sitting stationary in the earth's magnetic field．

A.hammering and jarring

B.vibration and pounding

C.varying magnetic fields

D.stable or permanent magnetism of the ship

Allowance for fresh water for all freeboards other than timber 25mm. This wording is likely to appear in ______.

A.INTERNATIONAL LOADLINE CERTIFICATE

B.PASSENGER SHIP SAFETY CERTIFICATE

C.CARGO SHIP SAFETY CONSTRUCTION CERTIFICATE

D.GENERAL DECLARATION

What is the period of validity of the SOLAS required Cargo Ship Safety Construction Certificate?

A.12 months

B.24 months

C.48 months

D.60 months

______ is issued under the provision of International Convention for the Prevention of Pollution from Ships，1973，as modified by the Protocol of 1978 relating thereto.

A.INTERNATIONAL OIL POLLUTION PREVENTION CERTIFICATE

B.CARGO SHIP SAFETY CONSTRUCTION CERTIFICATE

C.CARGO SHIP SAFETY EQUIPMENT CERTIFICATE

D.CARGO SHIP SAFETY RADIOTELEPHONY CERTIFICATE