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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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A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
A、the use of a poor quality oil
B、the deterioration of its properties
C、the formation of deposits
D、the reduction in heat transfer ability
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Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.
A . within the space concerned
B . outside the space concerned
C . the throttle station
D . within the fire room
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A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）
A . Gasoline
B . Water
C . Lubricating oil
D . sulphur compound
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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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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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The desirable properties of a marine fuel oil should include（）
A . high flash point and high viscosity
B . low flash point and high viscosity
C . low heating value and high sulphur content
D . high heating value and low sulphur content
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Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）
A . setting point
B . ash
C . sulfur content
D . carbon residue
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If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）
A . changed
B . centrifuged
C . filtered
D . settled
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Fuel oil tank vents are fitted with a screen which will stop（）.
A . oil from flowing out of the tank vent
B . air from entering the tank vent
C . vapors from leaving the tank vent
D . flames on deck from entering the tank vent
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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 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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The cetane number of a diesel fuel oil indicates its（）
A . Viscosity
B . acid content
C . heating value
D . ignition quality
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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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If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should（）
A . remove the discharge ring
B . re-prime the purifier
C . the centrifuge to its proper speed
D . install an additional discharge ring
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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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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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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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Late fuel injection in a diesel engine is indicated by low firing pressure with（）
A . high exhaust temperature
B . low exhaust temperature
C . fuel knock in each cylinder
D . mechanical knock in each cylinder
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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
