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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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Diesel engine fuel oil contamination often results in ()
A . governor malfunctions
B . fuel injection system malfunctions
C . high cylinder lube oil temperatures
D . low intake temperature
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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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The sequence of parts in a generally used fuel oil supply system for a main engine is () (1)tanks in the double bottom (2)centrifuges (3)service tank (4)settling tank (5)viscosity regulator
A . (1)-(2)-(4)-(3)-(5)
B . (1)-(4)-(2)-(3)-(5)
C . (1)-(3)-(2)-(4)-(5)
D . (1)-(5)-(4)-(2)-(3)
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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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Fuel oil contamination of an auxiliary diesel engine lube oil can result in()
A . an increased flash point
B . higher lube oil pressures
C . an increased viscosity
D . lower lube oil pressure
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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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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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There will usually be summaries or daily account tables for heavy oil, diesel oil, lubricating oil, and fresh water, which will be compiled()
A . at the beginning of every watch
B . at the beginning of the first watch every day
C . at the completion of every watch
D . at noon every day
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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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Lubricating oil should be changed on a heavy duty diesel engine when().
A . it gets dark in color
B . a sample rubbed between fingers feels thin
C . it has been in use for a specified interval
D . it no longer supports combustio
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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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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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We()this port for replenishment of fuel oil.
A . is calling at
B . are calling at
C . is calling on
D . are calling o
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Injectors for use with heavy fuel oil must be cooled by either water or light oil to ()
A . prevent heat corrosion to internal components
B . increase fuel delivery rate and economy
C . prevent pre-ignition
D . avoid carbonization of the nozzle ti
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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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(EMB145)FCOC(Fuel Cooled Oil Cooler)装在()
A . FDMU的下游
B . FDMU的上游
C . 在FPMU的齿轮泵和离心泵之间
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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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In order to benefit from the use of storm oil in heavy seas,the storm oil should be spread ().
A . around the rudder and screws
B . completely around the vessel
C . to leeward of the vessel
D . to windward of the vessel
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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