單項(xiàng)選擇題Permanent magnetism is caused by（）.

A.operation of electrical equipment and generators on board ship
B.the earth's magnetic field affecting the ship's hard iron during construction
C.the horizontal component of the earth's magnetic field acting on the horizontal soft iron
D.the vertical component of the earth's magnetic field acting on the vertical soft iron


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1.單項(xiàng)選擇題It is not necessary to declare（）in the Health List.

A.Appendicitis
B.Cholera
C.Plague
D.Typhus fever

2.單項(xiàng)選擇題It is not necessary to declare（）in MARITIME HEALTH DECLARATION.

A.Jaundice by fever
B.Acute skin rash or eruption with or without fever
C.Duodenitis

3.單項(xiàng)選擇題How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）

A.Drape along brackets
B.Leave in place while back loading cargo to save time
C.Hang vertically in the paint locker
D.All of the above

5.單項(xiàng)選擇題Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.

A.procedures for accepting cargo securing devices
B.procedures for maintaining and repairing cargo-securing devices
C.record of cargo securing device inspections
D.All of the above