A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange
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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
A.beats
B.beasts
C.bacons
D.battens
最新試題
Each cylinder in a two stroke cycle engine experiences combustion（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
An example of a messenger is a（）.
All electrical appliances aboard a vessel should be grounded to（）.
Static electricity may be built up by the（）.
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（）.
If the engine of a survival craft does not start，check to see（）.
Anchors are prevented from running out when secured by the（）.
The portable radio apparatus means（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.