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航海英语海上消防单项选择题每日一练(2018.10.15)

  • 单项选择题

    Dry chemical fire extinguishers are effective on which type(s) of fire?()

    A.Burning oil
    B.Electrical
    C.Paint
    D.All of the above

  • 单项选择题

    An effective method for moving patients with spinal injuries onto a spine board is known as the().

    A.pack-strap carry
    B.two man extremities carry
    C.fireman's drag
    D.four man log roll

  • 单项选择题

    Fire alarm system thermostats are actuated by().

    A.smoke sensors
    B.the difference in thermal expansion of two dissimilar metals
    C.pressure loss due to air being heated
    D.an electric eye which actuates when smoke interferes with the beam

  • 单项选择题

    An inert gas system is designed to reduce the possibility of tank explosions by().

    A.eliminating sparks and fire in the vicinity of cargo tanks
    B.removing all hydrocarbon gases from the cargo tanks
    C.blanketing cargo tanks with inert foam
    D.reducing the oxygen concentration below levels necessary for combustion

  • 单项选择题

    If,during helicopter refueling operations,fuel is spilled on clothing,the person should first().

    A.see the medic immediately
    B.spray himself with foam or CO2
    C.complete his task and then see the medic
    D.remove the clothing and wash

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