A.Movable ladders
B.Fixed ladders
C.Safety booms
D.Elevators
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A.air temperature at the time of the exposure
B.air pressure at the time of the exposure
C.humidity at the time of exposure
D.duration of the exposure
A.spring-loaded line thrower
B.hand thrown buoyant line
C.shoulder type line throwing gun
D.heaving line
A.Concentration of weight aft
B.Concentration of weight forward
C.Concentration of weight amidships
D.Concentration of weight at both ends of the vessel
A.The running reflection
B.The turning effect
C.The moving speed
D.The changing sensibility
A.cutting a square notch at each end of the crack
B.drilling a hole at each end of the crack
C.slot-welding the crack
D.welding a doubler over the crack
最新試題
How does a vessel’s rate of turn change when entering shallow water?（）
Freeboard is measured from the upper edge of the（）.
High pressure and low pressure alarms must be tested（）.
How can you estimate the position of a tropical storm’s center?（）
High clouds，composed of small white flakes or scaly globular masses，and often banded together to form a “mackerel sky”，would be classified as（）.
Given the same water depth and line tension，the holding power of a 19 pound/foot wire rope mooring system in comparison to the holding power of a 90 pound/foot chain mooring system will be（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.
Guide tolerances during elevation of the jack-up rig will（）.
How do the height and location of a tug’s towing bitts relate to the danger of tripping?（）
Generally speaking，in the Northern Hemisphere，when winds are blowing from between SE and SW the barometric reading（）.