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

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 combustio

A . prevent the generation of flammable or combustible gas in tanks B . blow out cargo lines to prevent 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 vapor

A . 150 millimeters of water pressure B . 125 millimeters of water pressure C . 100 millimeters of water pressure D . 75 millimeters of water pressure

A . bypass exhaust gas at high loads to prevent excessive back pressure B . bypass a portion of the exhaust gas at peak loads for better efficiency C . recycle exhaust gas to the turbocharger D . minimize moisture condensation in the boiler gas passages at low load

A . nitrogen B . oxygen C . carbon dioxide D . water vapor

A . Provides for faster loading B . Lowers oxygen content in the tank C . Provides better fuel economy D . All of the above

A . flammable vapors from entering machinery space B . flue gas escaping to atmosphere C . inert gas escaping to atmosphere D . air entering inert gas system

A . Exhaust gas pressure from the stack B . High capacity fan C . Inert gas compressor D . Natural aspiratio

A . purifies B . combinations C . concentrations D . filter

A . Scrubber B . Demister C . Deck water seal D . Final filter

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

A . hydraulic system B . pneumatic system C . spare battery D . hand crank

A . The tank must be gas freed B . The tank must be ballasted C . The tank must be vented to the atmosphere D . The bypass valve must also be closed

A . 5% B . 8% C . 6% D . 3%

A . allow sufficient oxygen in the tank to sustain life B . prevent outside air from entering the tank C . provide more discharge pressure D . comply with pollution regulatio

A . shoreside loading rate B . maximum cargo pump discharge rate C . boiler forced draft fan rate D . size of the largest cargo tank

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 gasse

A . filter B . cooler C . scrubber D . purifier

A . Scrubber B . Demister C . Deck water seal D . Final filter

A . 5% or less B . 10% or less C . 15% or less D . 20% or le

A . allow sufficient oxygen in the tank to sustain life B . prevent outside air from entering the tank C . provide increase in cargo discharge pressure D . comply with double hull pollution prevention regulatio

A . turned on B . turning on C . turn on D . to turn o

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°F C . the cooling water supply to the scrubbers is lost D . all of the above