A.the galvanizing on steel
B.a hatch cover
C.the outer plating of a vessel
D.synonymous with decking
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A.away from galleys，living quarters，or navigation spaces
B.only from areas equipped with power ventilation systems
C.from the open deck
D.isolated from sources of vapor ignition
A.degaussed
B.demagnetized
C.soaked
D.sandblasted
A.wooden plug
B.soft rubber plug
C.two-piece soft patch
D.mechanical means of closing
A.drop strakes
B.stealers
C.throughs
D.voids
A.help keep the deck dry
B.prevent stress concentrations on the stringer plate
C.protect against twisting forces exerted on the frame of the vessel
D.reinforce the side stringers
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Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.
Regulations require that access to a cargo pumproom in a tanker carrying grade D liquid cargo，shall be（）.
Buckler plates are（）.
Damaged bulkheads often take a permanent set which is independent of the panting or bulge caused by water pressure. To control this，you should（）.
Forecastle deck is located in the ship’s（）.
Shell plating is（）.
The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.
The purpose of cant frames in steel vessels is（）.
Fuel oil tank vents are fitted with a screen which will stop（）.
One function of a bulwark is to（）.