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单选题
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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a service tankB
a settling tankC
an expansion tankD
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Increase valve wearC
Excessive oil pumpingD
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high fuel oil supply flowC
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单选题The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler （）A
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to fuel oil instead of diesel oilB
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changedB
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filteredD
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cold corrosion of the nozzlesB
fuel viscosity for better atomizationC
carbon accumulation on the nozzlesD
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单选题Shaker, circulation and spray are the three general methods used in（）A
pre-injection fuel oil treatmentB
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单选题When the incinerator is stopped, which of the following is wrong?（）A
After stopping supplying sludge oil, the value and pipe should be flushed by flushed by diesel oil and the incinerator continue burning for 10 minutesB
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After stopping fuel, restoring the position of main fuel supply valveD
Stop blower as soon as stopping supplying fuel oil
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单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.A
two fuel oil transfer pumps provided where one is to be independent of the main engineB
two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineC
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the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached
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