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单选题
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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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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Heavy fuel oils when spilled are ______.A.more harmful to sea life than lighter oilsB.easier to clean up than lighter refined oilsC.less harmful to sea life than lighter oilsD.not a real threat to marine life
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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
test emergency generator
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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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单选题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 linersB
Increase valve wearC
Excessive oil pumpingD
Increase fuel consumption
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单选题Heavy residual fuel oils are heated prior to centrifuging to （）A
reduce fuel weightB
increase specific gravityC
separate fuel from lube oilD
reduce fuel viscosity
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单选题A small fuel spillage has occurred during helicopter refueling. After the leak has been stopped and fire-control personnel have been notified and are standing by，the next step is to（）.A
proceed with fueling operationB
have helicopter move to a safer locationC
wash spilled fuel away with a flood of waterD
clean spilled fuel with rags
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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 oilA
(1) only is correctB
(2) only is correctC
both (1) and (2) are correctD
neither (1) or (2) are correct
考题
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
考题
单选题The treatment of the fuel oils involves storage, heating, filtering and（）A
centrifugingB
pressurizingC
atomizationD
igniting
考题
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
考题
单选题Heavy fuel oils when spilled are（）.A
more harmful to sea life than lighter oilsB
easier to clean up than lighter refined oilsC
less harmful to sea life than lighter oilsD
not a real threat to marine life
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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If，during helicopter refueling operations，fuel is spilled on clothing，the person should first（）.A
see the medic immediatelyB
spray himself with foam or CO2C
complete his task and then see the medicD
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单选题The safe rate of bunkering heavy fuel oil is directly related to the （）.A
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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Sludge formation in a diesel engine lube oil system is caused by（）A
carbonization of oils from the combustion chambersB
emulsions of lube oil and waterC
coagulation of unburned fuel below the piston ringsD
all of the above
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单选题Heavy soot accumulations in an auxiliary boiler could be caused by（）A
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
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单选题You increased the （） to 150 tons that’s why the fuel oil （）.A
pumped speed；came outB
pumping rate；overflowedC
flowing rate；leaked outD
flowed speed；spilled out
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单选题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 increaseB
piston speeds increaseC
injection pressure decreaseD
engine speeds decrease
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单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）A
increase the starting air pressureB
use a higher than normal cranking speedC
increase the fuel injection pressureD
use a fuel having a lower ignition temperature
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
考题
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
考题
单选题（） fuel oils （） lubricating oils require treatment before passing to the engine.A
Both；andB
Neither；norC
Either；orD
Both；or
考题
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
考题
单选题If,during helicopter refueling operations,fuel is spilled on clothing,the person should first（）.A
see the medic immediatelyB
spray hinself with foam or COC
complete his task and then see medicD
remove the clothing and wash
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