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1题:
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
第2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3题:
What is the major function of the deck water seal in an inert gas system ________.
A.Relieve excessive overpressures in the system
B.Isolate hazardous from nonhazardous areas
C.Prevent the flow of inert gas into closed tanks
D.Remove any leftover water or soot after the gas has been scrubbed
第4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5题:
cargo pump failure
blower failure
deck seal low water level
low inert gas temperature
第6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7题:
Foam conducts electricity
To be most effective,foam should be directed at the base of the fire
Foam is most effective on burning liquids which are flowing
Foam can ONLY be used to extinguish class A fires
第8题:
it is not recommended: the system will not detect more malware
it is notpossible : the WSA will accept only one anti-malware license
the system will stop all web-based threats
it is recommended: the system will detect more malware
第9题:
excess stresses will not be set up in the boiler
the decks will not be covered with soot
the soot will be swept toward the uptakes
there will not be a loss of steam pressure
第10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11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 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14题:
Using an inert gas system on a tanker has which advantage(s)________.
A.Provides for faster loading
B.Lowers oxygen content in the tank
C.Provides better fuel economy
D.All of the above
第15题:
Which statement about inert gas pressures in a cargo tank is TRUE ________.
A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging
B.Gas pressures should be maintained at the highest permissible level throughout the discharging process
C.High gas pressures may cause pyrophoric oxidation in the tank
D.High gas pressures may cause loss of suction when stripping
第16题:
Which statement about using McAfee and Webroot together is true?()
第17题:
Provides for faster loading
Lowers oxygen content in the tank
Provides better fuel economy
All of the above
第18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:
flammable vapors from entering machinery space
flue gas escaping to atmosphere
inert gas escaping to atmosphere
air entering inert gas system
第22题:
filter
cooler
scrubber
purifier
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