A.screw pump
B.centrifugal pump
C.eductor
D.gear pump
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A.alternate expansion and contraction as water in a liquid state becomes a vapor
B.absorption of smoke and gases as water is converted from a liquid to a vapor
C.rapid contraction as water is converted from a liquid to a vapor
D.rapid expansion as water absorbs heat and changes to steam
A.detachable link
B.stud link
C.Kenter link
D.connection link
A.flame stopper
B.flame screen
C.flame filter
D.flame restrictor
A.enlarge bit
B.casing bit
C.hole opener
D.casing opener
A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
最新試題
What is it called when it is possible to ignite the vapour above the oil?（）
ECDIS must be able to perform all of the following EXCEPT（）.
Which of the following is not a form of precipitation?（）
Berthing means bringing a vessel to her berth until（）.
Full details of all lights and fog signals are shown on（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
The circulation around a low pressure center in the Northern Hemisphere is（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
Before any loading takes place any signs of the previous cargo should do（）.
When steering by autopilot,how often should the steering be checked?（）