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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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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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In discussing oil pollution, one important fact to remember is that the problem remains the same () heavy () light oil is spilled into the water.
A . both;and
B . whether;or
C . neither;nor
D . because;so
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Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?()
A . Glazing of the cylinder liners
B . Increase valve wear
C . Excessive oil pumping
D . Increase fuel consumptio
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When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?()
A . The diesel oil must never be allowed to mix with the heavy fuel
B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve
C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve
D . The heating steam must be secured before the diesel oil passes through the three-way valve
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When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?() Ⅰ.filtering Ⅱ.settling
A . Ⅰ only
B . Ⅱ only
C . either Ⅰ or Ⅱ
D . neither Ⅰ or Ⅱ
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Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce().
A . cold corrosion of the nozzles
B . fuel viscosity for better atomization
C . carbon accumulation on the nozzles
D . fuel detonation in the cylinder
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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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Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles()
A . filtering
B . centrifuging
C . depositing
D . operating
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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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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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Heavy residual fuel oils are heated prior to centrifuging to ()
A . reduce fuel weight
B . increase specific gravity
C . separate fuel from lube oil
D . reduce fuel viscosity
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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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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 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