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


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1.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

2.單項選擇題To prevent damage by and to storage batteries aboardsmall passenger vessels they should be located（）.

A.in trays constructed of material that is resistant to the electrolyte
B.so as to prevent movement when the vessel pitches and rolls
C.in a well ventilated area
D.All of the above

3.單項選擇題The vertical movement of a vessel in the water is called（）.

A.pitch
B.sway
C.heave
D.roll

4.單項選擇題The time required to incline from bow down to stern down and return to bow down again is called（）.

A.rolling period
B.amplitude moment
C.inclining moment
D.pitching period

5.單項選擇題The principal action in changing from transit to survival draft in the event heavy weather threatens is（）.

A.ballasting
B.deballasting
C.disconnecting
D.hanging off