單項(xiàng)選擇題A device used to enlarge the size of an existing bore hole，having teeth arranged on its outside circumference to cut the formation as it rotates is a（n）（）.

A.Enlarger bit
B.Casing bit
C.Hole opener
D.Casing opener


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1.單項(xiàng)選擇題A “figure eight” knot is used to（）.

A.be a stopper
B.shorten a line
C.join lines of equal size
D.keep a line from passing through a sheave

2.單項(xiàng)選擇題“15 02 41 Semi Double Queen 195 332mm”is a description of（）.

A.ISSA stores
B.IMPA stores
C.common marine stores
D.a reference to be studied

3.單項(xiàng)選擇題（） is true.

A.ISSA stores are numbered in six digits
B.IMPA stores are numbered in six digits
C.IMPA stores are numbered in seven digits
D.both ISSA and IMPA stores are numbered in unique six digits

4.單項(xiàng)選擇題Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）

A.Use the CO2 system and evacuate the engine room
B.Use the fire main system and evacuate the engine room
C.Evacuate the engine room and use the CO2 system
D.Evacuate the engine room and use the fire main system

5.單項(xiàng)選擇題Your vessel is listing 4° to port and has a short rolling period. There is loose firefighting water in the hull. The ship is trimmed down by the head with one foot of freeboard at the bow. Which action should you take FIRST?（）

A.Press up the slack NO.1 starboard double bottom tank
B.Pump out the forepeak tank
C.Eliminate the water in the 'tween decks aft