A.Send the wiper into the well with only a scoop and pail
B.Remove the bilge manifold valve and attempt to back flush the line
C.Simultaneously operate all available bilge pumps
D.It is only necessary to transfer half the contents of a drum of degreaser into the bilge well
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A.surface fatigue
B.fretting corrosion
C.heavy overloading
D.gear misalignment
A.doing
B.make
C.turn
D.operating
A.why
B.which
C.in which
D.on which
A.until
B.not until
C.not before
D.not after
A.Heat is always transferred at a constant rate
B.Heat transfer rate increases as temperature difference increases
C.The rate of heat transfer is not affected by temperature difference
D.The high temperature region is known as a heat sink
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Flame failure in an automatically fired auxiliary boiler can from a/an （）
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Under MARPOL Code the ship to which it applies has to carry （）
The shipboard oil pollution emergency plan will be invalid after （）
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（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.