The component in an inert gas system used for cleaning the g

How does an inert gas system on a tanker function to prevent explosions in cargo tanks?

A.De-energizes the "charged mist" effect

B.Maintains a positive pressure on the vent header to cool the flammable vapors

C.Inert gas filters out the flammable vapors from the cargo tank spaces

D.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit

Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．

A.Cools the inert gas

B.Maintains the oxygen content at 5% by volume

C.Drains off static electricity in the inert gas

D.Maintains the water seal on the gas main

An inert gas system installed on a tanker is designed to ______.

A.aid in the stripping and cleaning of cargo tanks

B.increase the rate of discharge of cargo

C.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere

D.lower the oxygen levels inside cargo tanks，making explosion nearly impossible

What is NOT a function of the scrubber of an inert gas system ________．

A.Cool the inert gas

B.Remove particulate matter like soot

C.Maintain pressure in the tanks

D.Remove chemical impurities

The deck water seal of the inert gas system ______．

A.Cools the inert gas and prevents soot from entering the cargo tanks

B.Acts as an emergency shutdown when inlet pressures exceed the safe working pressure

C.Prevents the backflow of hydrocarbon gasses into nonhazardous areas

D.Relieves sudden large overpressures in the system

Which method is used to supply inert gas from a flue gas system to the cargo tanks?

A.Exhaust gas pressure from the stack

B.High capacity fan

C.Inert gas compressor

D.Natural aspiration

After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning ________．

A.Scrubber

B.Demister

C.Deck water seal

D.Final filter

An inert gas system on a tanker should be used to ______.

A.prevent the generation of flammable or combustible gas in tanks

B.blow out cargo lines to prevent the build up of gas concentrations

C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit

D.prevent fires in the pumproom by continually displacing flammable vapors

The fresh air intake of the inert gas system ______，

A.Prevents the flue gas from falling below 3% content of oxygen

B.Allows the inert gas piping to be used for gas freeing the tanks

C.Opens when there is excessive vacuum on the deck water seal

D.Enables outside air to mix with and cool hot flue gasses

What is NOT a requirement for the safe and effective use of a crude oil washing system ________．

A.Strip all tanks and remove the bottom residue

B.Use an inert gas system while washing tanks

C.Use portable washing machines to reach areas obscured by structural members in the tanks

D.Debottom the tank used as the source for the tank cleaning machines