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Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）
A . Commence draining that tank as quickly as possible
B . Seal off all vents to that tank
C . Activate the CO
system to that tank
D . Shut off the steam heating coil
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For a L√Opurifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will （）.
A . be interrupted
B . move downwards
C . move outwards
D . retain original positio
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The burning of fuel oil in a diesel engine having a high sodium content, will cause （）
A . corrosion and grooving of exhaust valves
B . corrosion and gumming of the fuel injection pump
C . salt deposits in the exhaust manifold
D . slag deposits in the fuel injection equipment
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Dirt in the fuel oil system of a diesel engine can cause （）.
A . clogged filters
B . poor combustion
C . overloading of the diesel
D . shock of fuel line
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In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）
A . a separator
B . oil
C . water
D . an oil collecting space
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The main function of the lubrication system in to enable （） of a film of oil between the moving parts.
A . the information
B . the formation
C . the scatter
D . the frictio
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Which of the following characteristic of lube oil helps to reduce the amount of deposits in the piston ring belt during the combustion process in a diesel engine?（）
A . Low viscosity index
B . Low carbon forming tendencies
C . High film strength
D . High non-corrosive qualitie
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In an oil cooler circulated by sea water, the oil is at a larger pressure the result being that any leak in the cooler will mean a loss of （）.
A . oil
B . sea water
C . refrigerant
D . fresh water
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The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.
A . secure all openings to the tank
B . discharge an initial charge of CO
with a hand portable extinguisher
C . direct a fire hose into the tank and energize the fire main
D . spray the tank boundaries with a fire hose to promote cooling
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Excessive oil foaming in the crankcase of a refrigeration compressor can result in （）.
A . overheated compressor bearings
B . excess lube oil viscosity
C . carbon deposits on the compressor piston rings
D . wax crystals forming in the lubricant
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In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.
A . metal particles loosened by wear
B . air when no air cleaners are used
C . condensation of water vapors
D . breakdown of the lubricating oil by dilutio
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In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.
A . oil
B . sea water
C . air
D . fresh water
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Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of （）.
A . wax precipitation in the lube oil
B . contamination by dust, scale, or moisture
C . refrigerant bubbles in the lube oil
D . refrigerant reducing the lube oil viscosity
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In a refrigeration system, foaming of the crankcase oil may cause the （）.
A . expansion valve to overfeed
B . compressor to knock
C . water regulating valve to fail
D . crankcase drains to plug
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（）is not a process of weathering of the oil spilled in the sea water.
A . Biodegradation
B . Dissolution
C . Cleaning up by crew with skimmers
D . Oxidation including photooxidatio
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Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）
A . electronic ignition system
B . compression of air by the piston
C . friction in the fuel injector
D . fuel oil bearing system
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Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?（）
A、Height of the machine
B、Temperature of the liquid seal
C、Gravity disc
D、Bowl diameter
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Which of the following operations aboard a tanker must be recorded in the Oil Record Book（）.
A . Any internal transfer of oil cargo during a voyage
B . The discharge overboard in port or at sea of any bilge water accumulated in machinery spaces
C . The loading or unloading of any or all oil cargo
D . All of the above
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The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in （）
A . clogged fuel injection pumps
B . increased cylinder liner wear
C . intake valve stem corrosion
D . varnish deposit on pisto
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Excessive oil foaming in the crankcase of a refrigeration compressor at start up can cause（）.
A . compressor damage from improper lubrication
B . refrigerant absorption by the lubricant
C . increased viscosity in the lubricant
D . carbon deposit on the compressor suction valve
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The purpose of storm oil in a sea anchor is to（）.
A . weigh down the anchor
B . lubricate the anchor
C . repel dangerous fish
D . smooth the sea
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A condition that can increase the foaming tendency of lube oil is （）
A . excessively high oil temperatures
B . water or moisture contamination
C . fuel dilution
D . life its cylinder relief vale
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The percentage of impurities in a specific fuel oil sample is determined by （）.
A . settling in a fuel tank
B . testing in a laboratory centrifuge
C . burning in a calorimeter
D . testing in a closed cu
