Aboard a survival craft，ether can be used to ______．

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• 1What is the minimum period of time that the air supply for a self-contained breathing apparatus is required to last、

  A.10 minutes

  B.20 minutes

  C.30 minutes

  D.90 minutes

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• 2My ship is equipped ______ automatic hatch covers．

  A.with

  B.by

  C.on

  D.in

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• 3A hygrometer is a device used for determining ______．

  A.the absolute temperature

  B.atmospheric pressure

  C.wind velocity

  D.relative humidity

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• 4Manila lines in which the strands are right-hand laid ______．

  A.should be coiled in a clockwise direction

  B.should be coiled in a counterclockwise direction

  C.may be coiled either clockwise or counterclockwise

  D.should never be coiled

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• 5Molded depth is measured from the ______．

  A.inside of the shell

  B.outside of the shell

  C.top of the center vertical keel

  D.top of the garboard stake

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• 6You notice smoke coming from an open laundry room doorway．After activating the fire alarm, which of the following would you do FIRST、

  A.Attempt to determine what is burning．

  B.Acquire the nearest life jacket.

  C.Break out the nearest fire hose.

  D.Wait for the fire team to arrive and assist as directed.

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• 7If the survival craft is not loaded to full capacity，the personnel should be ______．

  A.loaded more on the port side forward

  B.loaded equally on both sides with more forward

  C.loaded equally on both sides with more aft

  D.allowed to sit anywhere

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• 8Keeping the draft at or below the load line mark will insure that the vessel has adequate ______．

  A.ballast

  B.reserve buoyancy

  C.displacement

  D.rolling periods

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• 9The two most effective generating forces of surface ocean currents are ______．

  A.temperature and salinity differences in the water

  B.wind and density differences in the water

  C.water depth and underwater topography

  D.rotation of the Earth and continental interference

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• 10GM cannot be used as an indicator of stability at all angles of inclination because ______．

  A.M is not fixed at large angles

  B.there is no M at large angles

  C.G is not fixed at large angles

  D.there is no G at large angles

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