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单选题
The hydrostatic release on the inflatable liferafts on a fishing vessel must be（）.
A
replaced annually
B
tested monthly
C
serviced annually
D
overhauled quarterly
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rigC
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单选题Under normal conditions a liferaft is released from itscradle by（）.A
cutting the restraining strapB
unscrewing the turnbuckle on the back of the cradleC
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单选题A hydrostatic release mechanism for a liferaft（）.A
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must be submerged to a certain depth to release automatically
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must be wet before it will releaseB
should be kept in a watertight cover except in an emergencyC
will inflate the raft in its cradle if operated manuallyD
must be submerged to a certain depth to release automatically
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单选题If the hydrostatic release mechanism for an inflatable liferaft is not periodically serviced and becomes inoperative，it will NOT（）.A
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free the liferaft from the vesselD
break the seal on the carbon dioxide cylinder
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Pull on the hydrostatic release，pull on the sea painterB
Push on the hydrostatic release，pull on the sea painterC
Push on the hydrostatic release，push on the sea painterD
Pull on the hydrostatic release，push on the sea painter
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stow rainwater; these 4 spaces do not take up valuable spaceB
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hold the freshwater required by regulation to be provided in the raft when packedD
None of the above
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