A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load
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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
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
最新試題
Each cylinder in a two stroke cycle engine experiences combustion（）.
An example of a messenger is a（）.
Cargo pump relief valves are piped to the（）.
An example of a modern anchor which has a stock is a(n)（）.
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（）.
Permission is kindly requested（）the ballast water.
In relation to cargo gear，what does SWL mean?（）.
The bypass valve on a self-contained breathing device should be opened if（）.
Static electricity may be built up by the（）.
The most common type of davit found on merchant vessels today is the（）.