A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity
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A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange
A.yearly inspection
B.quarterly inspection
C.monthly inspection
D.weekly inspection
A.keep a line from fraying
B.join lines of unequal size
C.stop off a line
D.shorten a line
A.positive correction
B.dip error
C.negative correction
D.semidiameter error
A.Restricted area
B.Closed area
C.Prohibited place
D.Forbidden place
最新試題
In ship construction，keel scantlings should be the greatest（）.
The series of valves used to control the return flow in well control operations is called the（）.
An integral part of a blowout preventer that serves as the closing element on an open hole，and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the（）.
The most common type of davit found on merchant vessels today is the（）.
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
In relation to cargo gear，what does SWL mean?（）.
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.