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航海英語單項選擇題每日一練(2019.09.16)

單項選擇題
Progressive flooding may be indicated by（）.
A.ballast control alarms
B.excessive draft
C.excessive list or trim
D.a continual worsening of list or trim
單項選擇題
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
A.persistence
B.pulse repetition rate
C.pulse length
D.resolution
單項選擇題
When should the emergency position-indicating radiobeacon be activated after abandoning a ship?（）
A.Immediately
B.After one hour
C.Only when another vessel is in sight
D.Only after sunset
單項選擇題
An inflatable liferaft should be manually released from its cradle by（）.
A.cutting the straps that enclose the container
B.removing the rubber sealing strip from the container
C.loosening the turnbuckle on the securing strap
D.pushing the button on the hydrostatic release
單項選擇題
The above mentioned ship has been duly（）in accordance with the provisions of the convention referred to.
A.relayed
B.delayed
C.conveyed
D.surveyed