air from contacting the oil vapors
permitting re-ignition boiling of the heated oil
spontaneous combustion below the oil surface
toxic fumes from escaping to the surface
第1题：
A. has been on
B. has on
C. was on
D. had been on
第2题：
After a fire has been extinguished in a closed space, personnel may safely enter the space when
A.smoke density has been decreased sufficiently to see the bulkhead opposite the compartment's entrance
B.a lifeline and explosion proof flash light are used
C.all smoke and toxic fumes are removed and an adequate oxygen supply is present
D.overhaul has been completed to remove any possible source of re-ignition
第3题：
When will the fire department come to conduct a fire prevention inspection in our company?
A. Next month. I’ve checked hydrants and fire-extinguishers on each floor
B.Next day. The manager will check hydrants and other equipment in the building.
C.Next week. But hydrants and fire extinguishers on each floor has already been checked
D.The day before yesterday. I had already checked hydrants and fire extinguishers on each floor.
第4题：
A galley grease fire on the stove may be extinguished using______．
A.water
B.foam
C.the range hood extinguishing system
D.fire dampers
第5题：
The ventilation system of your ship has fire dampers restrained by fusible links. Which statement is TRUE?
A.Fusible links must be replaced if a damper is activated
B.Fusible links are tested by applying a source of heat to them
C.Fusible links must be replaced at every inspection for certification
D.A fusible link will automatically open after a fire is extinguished and reset the damper
第6题：
_____, water turns into ice.
A、When freezing
B、When frozen
C、When it has been frozen
D、When freezes to it
第7题：
When oily ballast has been pumped overboard，an entry must be made in the ______.
A.Oil Record Book
B.Official Logbook
C.deck rough log
D.engine rough log
第8题：
A.had been collected
B.has collected
C.has been collected
第9题：
One disadvantage of using regular dry chemical（sodium bicarbonate）in firefighting is that ______．
A.It can break down under high heat and emit noxious fumes
B.It will decompose under prolonged storage and lose its effectiveness
C.Fire has been known to flash back over the surface of an oil fire
D.It is ineffective in fighting fires in high-voltage electrical equipment
第10题：
If you must enter water on which there is an oil fire, you should ______.
A.protect your life preserver by holding it above your head
B.enter the water on the windward side of the vessel
C.keep both hands in front of your face to break the water surface when diving head first
D.wear very light clothing