Which operation may cause the pressure in an inert tank to fall below the prescribed limits ________．A.LoadingB.DischargingC.Crude oil washingD.Steaming tanks

a subsequent temperature rise will cause the cargo to overflow

air pockets may cause the cargo to bubble out of the ullage hole

the increased viscosity of the product requires higher loading pressure which increases the chances of a spill

the tank valve may be stiff and a spill will occur before the valve can be closed

starters

pressure switches

pressure

water

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

Stripping

Loading

Cleaning

All of the above

Increased viscosity of the product needs higher loading pressure, which increases the chances of a spill

Air pockets may cause the fuel to bubble out of the ullage hole

The temperature rise of the fuel will cause an overflow

Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened

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

Excessive piston blow-by to the manifold

Insufficient cooling water flow

Accumulated water in the air boxes

Clogged air intake filters

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

Loading

Discharging

Crude oil washing

Steaming tanks

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

Improper fuel rack positioning

Lengthy opening of the exhaust valve

Excessively early injection timing

Extended light load operation

incapable of supporting combustion because the hydrocarbon content is below the LFL (Lower Flammable Limit)

capable of supporting combustion because the hydrocarbon content is above the UFL (Upper Flammable Limit)

capable of supporting a fire once started

not safe for ballasting

refrigerant overcharge

overfeeding by the expansion valve

a restricted suction strainer

due to short cycling of the compressor

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

any of (1) and (3)

any of (1) and (2)

any of (2) and (3)

any of (1), (2) and (3)

the introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume

the introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume

the introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo

All of the above

an air leak has developed in the tank

the tank cooling system has malfunctioned

the pilot cylinder discharge valve is leaking

an excessive amount of insulation has been installed on the tank and piping

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