A.cirrus
B.cirrocumulus
C.altostratus
D.cumulonimbus
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A.moor a damaged barge to the bank and leave
B.remove and deliver a loaded barge from a multiple tow
C.remove a barge while locking through
D.tow an empty barge astern
A.to right the raft if it capsizes
B.to carry the raft around on deck
C.for crewmen to hang on to
D.to hang the raft for drying
A.Fires in electrical equipment
B.Flammable oils and greases
C.Class "A" fires in ordinary combustibles
D.Materials containing their own oxygen
A.reduce spud can bearing pressure
B.keep the unit level and reduce overloading
C.reduce stresses on the hull
D.minimize the potential for punch-through
A.entered through a dredged cut
B.not accessible in easterly gales
C.available for vessels up to a maximum draft of 8 feet (2.4m)
D.not affected by the tide
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General information on enroute weather and climate is found in（）.
How are riveted lap joints made watertight?（）
Generally speaking，in the Northern Hemisphere，when winds are blowing from between SE and SW the barometric reading（）.
Generally speaking，you should expect to find low atmospheric pressure prevailing in the earth’s（）.
High pressure and low pressure alarms must be tested（）.
How do you operate a portable CO2 fire extinguisher?（）
How do you determine the weight of the vessel that is supported by the ground when a vessel has run aground?（）
How is a safe water mark，that can be passed close aboard on either side，painted and lighted?（）
How can you estimate the position of a tropical storm’s center?（）
Freeboard is measured from the upper edge of the（）.