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
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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
A.mimimum oxygen content line
B.critical displacement line
C.critical dilution line
D.upper threshold limit
最新試題
The amount of LFG that may be loaded into a given tank is determined by（）.
When fueling has been completed（）.
The primary hazard of liquefied petroleum gas and liquefied natural gas is（）.
The shut off valve at the gasoline tank which can be operated from outside the tank space （）.
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called（）.
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
Compared to the amount of concentrated foam liquid used，the amount of low expansion mechanical foam produced is（）.
Upon release to the atmosphere，LFG readily（）.
LFG tank and pipeline maintenance should include（）.
What is used to test a tank for oxygen content?（）