in open air
inside cabins
in machinery space
underwater
第1题：
While underway and towing an unmanned tank barge you are required to ______.
A.maintain a strict watch on the barge from the towing vessel
B.fly a red flag from the towing vessel
C.open the tops of all empty tanks on the barge
D.take hourly soundings of any loaded tanks on the barge
第2题：
Which statement about entry into a space that has been sealed for a long time is TRUE ________．
A.A tank that has been used to carry hazardous liquids should be tested for oxygen content，toxicity，and explosive gases
B.You can safely enter the space without a breathing apparatus if the oxygen content exceeds 14%
C.The natural ventilation through the installed vents is sufficient to provide the proper oxygen content
D.The heat of the sun on upper ballast tanks，such as in a bulk carrier，may generate carbon monoxide
第3题：
You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE?
A.Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned
B.The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank
C.The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue
D.Steam cleaning and water washing are both capable of generating electrostatic charges within a tank
第4题：
CIt is desirable to have screens on the vents of potable water tanks to ______．
A.Filter the incoming air
B.Prevent explosions
C.Prevent backups
D.Stop insects from entering
第5题：
Gasoline fuel tank vents should terminate ______．
A.In the engine compartment
B.In the fuel tank space
C.Above or outside the hull
D.At the most convenient location
第6题：
The nozzle of a gasoline hose or can should be kept ______．
A.In contact with the fill opening to guard against static spark
B.From making contact with the fill opening to guard against static spark
C.In contact with the fill opening to allow proper venting
D.None of the above
第7题：
The tops of vents from gasoline tanks should terminate ______．
A.in open air
B.inside cabins
C.in machinery space
D.underwater
第8题：
Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?
A.Each vent for the tank must be equal to the area of the tank filling line
B.The tanks must be protected by overflows
C.The total area of the vents or the overflow shall be at least equal to the area of the fill line
D.There must be twice as much vent area as the area of the fill line
第9题：
Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with ______．
A.Gooseneck vents and flame screens
B.Pressure-vacuum relief valves
C.Branch vent lines and a vent header
D.Forced draft blowers
第10题：
controls the amount of gasoline to the engine
shuts off the gasoline supply at the tank
is used if the gasoline tank leaks
All of the above