A.the vapor air mixture is too rich to burn
B.an explosion may occur if a source of ignition is present
C.the vapor air mixture is too lean to bum the upper explosive
D.limit has been exceeded
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A.insulate your shoes
B.ground the fire hose
C.secure its power supply
D.start the fire pump
A.start the fire pump to charge the fire main
B.standby the main console and await orders from the engineer on watch
C.go to your fire station
D.go to your lifeboat station
A.boarding and operating procedures
B.maintenance schedule
C.navigational systems
D.fuel consumption rates
A.vomiting
B.blue color and lack of breathing
C.irregular breathing
D.unconscious condition
A.Commence draining that tank as quickly as possible
B.Seal off all vents to that tank
C.Activate the CO2 system to that tank
D.Shut off the steam heating coils
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During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
To proceed to the assistance of a ship in distress is（）
If separating effect is not good, which measure should be taken （）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
Under MARPOL Code the ship to which it applies has to carry （）
The shipboard oil pollution emergency plan will be invalid after （）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）