A.keel
B.center of buoyancy
C.tipping center
D.amidships section
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A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity
A.after the discharge valve
B.between the pump and discharge valve
C.after the suction valve
D.between the pump and suction valve
A.CCS marine surveyor
B.certified marine chemist
C.port engineer
D.MSA marine inspector
A.cooling the gas below the ignition point
B.cutting off the supply of oxygen
C.stopping the flow of gas
D.interrupting the chain reaction
A.odor
B.color
C.pressure
D.density
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The weight of liquefied petroleum gas vapors as compared to air is（）.
When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.
Combustible gas indicators operate by drawing an air sample into the instrument（）.
Upon release to the atmosphere，LFG readily（）.
If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）
Which is NOT a safety precaution to be observed during the loading of LFG?（）
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called（）.
Where should the tops of vents from gasoline tanks terminate?（）.
The storage device for nitrogen-pressurized hydraulic fluid，which is used in closing the blowout preventers is called the（）.
To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.