單項選擇題When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.

A.reduce the time the sounding tube is open
B.avoid creating a spark
C.lessen the effect of roll or pitch on the reading
D.lessen the effect of heave on the reading


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1.單項選擇題When running before a heavy sea，moving weights aft will affect the handling of a vessel by （）.

A.reducing rolling
B.increasing rolling
C.reducing yawing
D.increasing yawing

2.單項選擇題When preparing a ship for heavy weather，fuel oil day tanks should be（）.

A.pumped overboard to calm the seas
B.drained to the lower hull to reduce free surfaces
C.filled to ensure that sufficient fuel oil is available during a lengthy emergency
D.partially drained to increase free surfaces in order to reduce motions

4.單項選擇題When a deck cargo is secured with chain or wire lashings and grab (pear) links，which statement is FALSE?（）

A.The amount of take-up is limited by the length of the turnbuckle
B.At the grab (pear) link，the slack end of chain should be led back and secured to the chain above the link
C.The lashings should be inspected each day and any slack taken up
D.The turnbuckle should be secured with a stick or lock nuts

5.單項選擇題What indicates that a tropical cyclone may be within 500 to 1，000 miles of your position?（）

A.A pumping of the barometer up and down a few millibars
B.A sudden wind shift from southwest to northwest followed by steadily increasing winds
C.The normal swell pattern becoming confused，with the length of the swell increasing
D.An overcast sky with steadily increasing rain from nimbostratus clouds