单项选择题
Generally，what is used to inflate liferafts?（）.
A.non-toxic gas
B.Oxygen
C.Hydrogen
D.Helium
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相关考题
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单项选择题
Each liferaft，which does not have an indicated maximum stowage height indicated on the liferaft，must be（）.
A.limited to carry no more than 10 persons
B.stowed not more than 59 feet above the lightest waterline
C.stowed in quick release racks
D.inspected every six months -
单项选择题
Each lifebuoy shall be marked in block capitals of the Roman alphabet with（）of the ship.
A.the call sign and name
B.the official number and name
C.the port of registry and name
D.the port of registry and official number -
单项选择题
As a vessel sinks to a depth of 15 feet，the hydrostatic trip releases the liferaft container from its cradle by（）.
A.breaking the weak link
B.releasing the tie-down strap
C.pulling the operating cord
D.releasing the CO2 canister
