一起答
单选

A fire of escaping liquefied flammable gas is best extinguished by ______.

  • A.cooling the gas below the ignition point
  • B.cutting off the supply of oxygen
  • C.stopping the flow of gas
  • D.interrupting the chain reaction
试题出自试卷《甲类三副航海英语试题及答案(2)》
参考答案
查看试卷详情
相关试题
  1. A qualified deck officer should be______the watch.

    • A.in charge of
    • B.arranged
    • C.decided to
    • D.the depth of
  2. A pumproom is suspected of accumulating gases after a ventilation machinery breakdown.Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? ______.

    • A.In the lower level of the pumproom
    • B.In the middle level of the pumproom
    • C.In the upper level of the pumproom
    • D.On the deck outside the pumproom
  3. A protective suit which reduces the body heat-loss of a person wearing it in cold water is called______.

    • A.water suit
    • B.diving suit
    • C.immersion suit
    • D.swimming suit
  4. A proper look-out shall be maintained ______.

    • A.only at night
    • B.only during restricted visibility
    • C.at night and during restricted visibility
    • D.at all times
  5. A position obtained by crossing lines of position taken at different times and advanced to acommon time is a(n) ______.

    • A.dead-reckoning position
    • B.running fix
    • C.estimated position
    • D.Fix
  6. A position that is obtained by applying estimated current and wind to your vessel’s courseand speed is a(n) ______.

    • A.dead reckoning position
    • B.estimated position
    • C.fix
    • D.None of the above
  7. A position that is obtained by using two or more intersecting lines of position, taken atnearly the same time, is a(n) ______.

    • A.estimated position
    • B.fix
    • C.running fix
    • D.dead-reckoning position
  8. A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in ______.

    • A.generators
    • B.oil drums
    • C.the bridge controls
    • D.combustible metals
  9. A position obtained by applying only your vessel’s course and speed to a known position is a _______.

    • A.dead-reckoning position
    • B.fix
    • C.probable position
    • D.running fix
  10. A polyconic projection is based on a ______.

    • A.plane tangent at one point
    • B.cylinder tangent at one parallel
    • C.cone tangent at one parallel
    • D.series of cones tangent at selected parallels