A.remove oxygen from the area
B.smother fire with foam
C.smother fire with CO2
D.cool fuel below ignition temperature
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A.low-velocity fog
B.high-velocity fog
C.a straight stream of water
D.foam spray
A.can not be ignited by a spark unless the vapor is in a confined space
B.are nontoxic in all concentrations
C.can not be ignited by a spark unless they are at their auto-ignition temperature
D.are heavier than air
A.fuel
B.oxygen
C.heat
D.electricity
A.odorless
B.explosive
C.nontoxic
D.visible
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
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The shipboard oil pollution emergency plan will be invalid after （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
If separating effect is not good, which measure should be taken （）
Diesel engine air start system check valves are opened by （）
Which of the following items don’t belong to dock repair works?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
Cold weather starting of a diesel engine may be made easier by（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）