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单选题
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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更多 “单选题When centrifuging heavy fuel oil, an important factor to consider is the （） (1) flow rate (2) viscosity of the fuel oilA (1) only is correctB (2) only is correctC both (1) and (2) are correctD neither (1) or (2) are correct” 相关考题
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单选题When the ship is going to enter into the harbor,（）A
change from heavy fuel oil to diesel oil for mail engineB
pumping oil bilge waterC
change sea chest form high level one to lower oneD
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单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）A
cold fuel oilB
low fuel oil pressureC
low atomizing steam pressureD
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单选题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；andB
whether；orC
neither；norD
because；so
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reduce fuel weightB
increase specific gravityC
separate fuel from lube oilD
reduce fuel viscosity
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单选题A viscosity regulator used for an engine is usually provided in order to （） for an engine burning heavy fuel oil.A
regulate the fuel supplyB
maintain a constant fuel viscosity at the fuel valvesC
maintain efficient coolingD
alter the fuel density
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单选题Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）A
setting pointB
ashC
sulfur contentD
carbon residues
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单选题When an auxiliary boiler is panting and emitting black smoke, you should （）.A
increase the fuel oil temperatureB
decrease the fuel oil temperatureC
decrease the fuel oil supply pressureD
increase the air supply
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单选题Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?（）A
SludgeB
GasolineC
Fuel oilD
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单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.A
filter to remove the fuel oilB
use the settler to remove the fuel oilC
remove the fuel oil by centrifugingD
drain and then renew the lube oil supply
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单选题When preparing a ship for heavy weather，fuel oil day tanks should be（）.A
pumped overboard to calm the seasB
drained to the lower hull to reduce free surfacesC
filled to ensure that sufficient fuel oil is available during a lengthy emergencyD
partially drained to increase free surfaces in order to reduce motions
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单选题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
WhiteB
BlackC
BlueD
Clear
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单选题Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）A
prevent heat corrosion to internal componentsB
increase fuel delivery rate and economyC
prevent pre-ignitionD
avoid carbonization of the nozzle tips
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单选题The safe rate of bunkering heavy fuel oil is directly related to the （）.A
type of fuel transfer pump aboardB
temperature of the fuel oil being receivedC
size of the fuel storage tanks ashoreD
distance from the fuel oil storage tanks ashore
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单选题Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?（）A
Increased viscosity of the product needs higher loading pressure, which increases the chances of a spillB
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The temperature rise of the fuel will cause an overflowD
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单选题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 receivedB
flash point of the fuel as it is receivedC
fuel temperature as it is receivedD
viscosity of the fuel being received
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water in the fuel oilB
excessive cyclingC
high fuel oil pressureD
improper burner maintenance
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单选题Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.A
cold corrosion of the nozzlesB
fuel viscosity for better atomizationC
carbon accumulation on the nozzlesD
fuel detonation in the cylinders
考题
单选题Proper filtering and straining of fuel oil is important because the （）.A
fuel oil pump will over-speed if dirt is not removedB
fuel oil transfer pumps cannot tolerate small amounts of dirt in the oilC
fuel injectors may be damaged by foreign particles in the fuel oilD
dirty fuel will clog the intake air filter
考题
单选题When the heavy fuel oil is heated to achieve the viscosity of 10-15 cst, may occur.To avoid this, a system is used in most occasions（）A
boiling and cavitations; low temperatureB
boiling and cavitations; pressurizedC
leaking and boiling; low temperatureD
leaking and boiling; pressurized
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单选题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 fuelB
The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valveC
The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveD
The heating steam must be secured before the diesel oil passes through the three-way valve
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单选题When the ships is going to enter into the harbor,（）.A
change from diesel oil to heavy fuel oil for mail engineB
pump out bilge waterC
change sea chest form lower level one to high level oneD
test emergency generator
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