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
第1题:
The blowers of an inert gas generation system aboard a tanker,will be automatically secured if ______.
A.Normal water supply at the water seal is lost
B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉
C.The cooling water supply to the scrubbers is lost
D.All of the above
第2题:
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
第3题:
Which statement is TRUE concerning inert gas systems on tankers ________.
A.Flue gases from the ship's boilers are used in some systems
B.The gas is helium
C.Using the system accelerates the rusting of the tanks
D.All of the above
第4题:
An inert gas system is designed to reduce the possibility of tank explosions by ______.
A.eliminating sparks and fire in the vicinity of cargo tanks
B.removing all hydrocarbon gases from the cargo tanks
C.blanketing cargo tanks with inert foam
D.reducing the oxygen concentration below levels necessary for combustion
第5题:
prevents the flue gas from falling below 3% content of oxygen
allows the inert gas piping to be used for gas freeing the tanks
opens when there is excessive vacuum on the deck water seal
enables outside air to mix with and cool hot flue gasses
第6题:
cools the inert gas and prevents soot from entering the cargo tanks
acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zone
prevents the backflow of hydrocarbon gasses into nonhazardous areas
relieves sudden large overpressures in the system
第7题:
The tank must be gas freed
The tank must be ballasted
The tank must be vented to the atmosphere
The bypass valve must also be closed
第8题:
aid in the stripping and cleaning of cargo tanks
increase the rate of discharge of cargo
force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere
lower the oxygen levels inside cargo tanks,making explosion nearly impossible
第9题:
flammable vapors from entering machinery space
flue gas escaping to atmosphere
inert gas escaping to atmosphere
air entering inert gas system
第10题:
filter
cooler
scrubber
purifier
第11题:
5% or less
10% or less
15% or less
20% or less
第12题:
cools the inert gas and prevents soot from entering the cargo tanks
acts as an emergency shutdown when inlet pressures exceed the safe working pressure
prevents the backflow of hydrocarbon gasses into nonhazardous areas
relieves sudden large overpressures in the system
第13题:
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
第14题:
Which statement about the inert gas system is TRUE ________.
A.Boiler soot blowers should never be used when the IG system is operating
B.The boiler will produce the best quality of flue gas for the IG system when the boiler load is very light
C.The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very light
D.Flue gas with excessive oxygen content is de-oxygenated in the scrubber
第15题:
The venting system shall be provided with devices to prevent the passage of ______ into the cargo tanks.
A.flame
B.inert gas
C.air
D.oil gas
第16题:
De-energizes the charged mist effect
Maintains a positive pressure on the vent header to cool the flammable vapors
Inert gas filters out the flammable vapors from the cargo tank spaces
Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
第17题:
Scrubber
Demister
Deck water seal
Final filter
第18题:
eliminating sparks and fire in the vicinity of cargo tanks
removing all hydrocarbon gases from the cargo tanks
blanketing cargo tanks with inert foam
reducing the oxygen concentration below levels necessary for combustion
第19题:
Cut in another IG fan to increase gas flow
Open the pressure control valve until the pressure increases
Open the tank isolation valve to the fully open position
Reduce the pumping rate
第20题:
Exhaust gas pressure from the stack
High capacity fan
Inert gas compressor
Natural aspiration
第21题:
prevent the generation of flammable or combustible gas in tanks
blow out cargo lines to prevent the build up of gas concentrations
dilute tank atmospheres to keep gas concentrations below the lower explosive limit
prevent fires in the pumproom by continually displacing flammable vapors
第22题:
prevent the generation of flammable or combustible gas in tanks
blow out cargo lines to prevent gas concentrations
dilute tank atmospheres to keep gas concentrations below the lower explosive limit
prevent fires in the pumproom by continually displacing flammable vapors
第23题:
normal water supply at the water seal is lost
the temperature of the inert gas being delivered to the cargo tanks is more than 150°F
the cooling water supply to the scrubbers is lost
all of the above