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The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.
A . quantity of fuel to be received
B . flash point of the fuel as it is received
C . fuel temperature as it is received
D . viscosity of the fuel being received
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In a typical fuel system, the oil is stored in （） in the double bottom.
A . setting tanks
B . service tanks
C . tanks
D . drain tank
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When the fuel oil is burning in the combustion chamber, it （）.
A . gives up large amount of heat
B . gives off large amount of heat
C . gives up large amount of steam
D . gives off large amount of steam
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What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）
A . White
B . Black
C . Blue
D . Clear
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When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）
A . plugging gooseneck tank vents to prevent accident overflow
B . maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C . sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D . maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the shi
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Heavy fuel oils when spilled are（）.
A . more harmful to sea life than lighter oils
B . easier to clean up than lighter refined oils
C . less harmful to sea life than lighter oils
D . not a real threat to marine life
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When centrifuging heavy fuel oil, an important factor to consider is the （） (1) flow rate (2) viscosity of the fuel oil
A . (1) only is correct
B . (2) only is correct
C . both (1) and (2) are correct
D . neither (1) or (2) are correct
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When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）
A . the amount of lube oil additives increase
B . piston speeds increase
C . injection pressure decrease
D . engine speeds decrease
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When preparing a ship for heavy weather，fuel oil day tanks should be（）.
A . pumped overboard to calm the seas
B . drained to the lower hull to reduce free surfaces
C . filled to ensure that sufficient fuel oil is available during a lengthy emergency
D . partially drained to increase free surfaces in order to reduce motio
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Obviously, for a given fuel oil, its pour point is （） its cloud point.
A . lower than
B . higher than
C . as same as
D . better tha
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Fuel oil is pumped by means of （） from the bunker tanks.
A . a transfer pump
B . a bilge pump
C . a service pump
D . a vacuum pum
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The specific gravity of fuel oil is a （）.
A . absolute value
B . relative value
C . constant value
D . set value
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Which of the following problems may occur when using fuel oil with a high sulphur content?（）
A . Injection lag
B . Lube oil dilution
C . Pre-ignition
D . Corrosio
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A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter
A . Ⅰonly
B . Ⅱonly
C . eitherⅠorⅡ
D . neitherⅠnor
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Fuel oil discharged to the diesel engine cylinder is atomized at the （）
A . turbocharger
B . injection nozzle tip
C . carburetor
D . fuel oil pum
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The fire of fuel oil is classified as（） fire.
A . Class A
B . Class B
C . Class C
D . Class D
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Fuel oil is regularly transferred to the day tank in order to （）
A . allow impurities to settle out of the fuel
B . allow air to escape from the fuel
C . make fuel available for immediate use
D . all of the above
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Proper filtering and straining of fuel oil is important because the （）.
A . fuel oil pump will over-speed if dirt is not removed
B . fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil
C . fuel injectors may be damaged by foreign particles in the fuel oil
D . dirty fuel will clog the intake air filter
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When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
A . filter to remove the fuel oil
B . use the settler to remove the fuel oil
C . remove the fuel oil by centrifuging
D . drain and then renew the lube oil supply
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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
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Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.
A . notify the terminal superintendent
B . place a large drip pan under the leak and ping the scuppers
C . repair the hose with a patch
D . replace the hose
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In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
A . a service tank
B . a collecting tank
C . a sump
D . a settling tank
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When the heavy fuel oil is heated to achieve the viscosity of 10-15 cSt, may occurTo avoid this, a system is used in most occasions.
A.boiling and cavitations; low temperature
B.boiling and cavitations; pressurized
C.leaking and boiling; low temperature
D.leaking and boiling; pressurized
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In purification, there is no fuel oil in the clean oil outlet.It could be caused by _____. I.too high temperature of the dirty fuel oil; II. too low temperature of the dirty fuel oil; III. Clogged filter
A．I
B．I．II．III
C．II．III
D．II
