A.lack of toxicity
B.the multipurpose extinguishing ability
C.bum-back protection
D.cooling ability
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A.can be used in conjunction with wire or spring-lay rope
B.can be stored on decks exposed to sunlight
C.can hold a load even when a considerable amount of the yarns have been abraded
D.gives audible warning of overstress whereas manila does not
A.used to measure the speed of wind
B.in which the pressure of air is measured
C.that tells which dirction a storm is coming from
D.used to measure the height of waves
A.a boat bucket
B.an air tank filled with water
C.an oar and canvas weighted down
D.All of the above
A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above
A.fairlead
B.heaving line
C.stay
D.warp
最新試題
When steering by autopilot,how often should the steering be checked?（）
A tide is called diurnal when（）.
The mean draft of a ship is the draft（）.
What is it called when it is possible to ignite the vapour above the oil?（）
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
It is dangerous for vessels without the operational radar（）the estuary.
Before any loading takes place any signs of the previous cargo should do（）.
Which of the following is not a form of precipitation?（）
The helm command PORT TWENTY means（）.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.