单项选择题
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 liners
B.Increase valve wear
C.Excessive oil pumping
D.Increase fuel consumption
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相关考题
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单项选择题
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated （）
A.for atomizing
B.for centrifuging
C.in a storage tank
D.in the re-circulating line -
单项选择题
The temperature of the fuel oil received during bunkering operation is critical in determining the （）
A.expansion space to leave in a tank
B.flash point at which the fuel will burn
C.temperature to which the fuel must be heated
D.rate at which the fuel can be pumped during transfer operations -
单项选择题
Which of the following fuel oil characteristics establishes the danger point when transferring, pumping, and firing procedures are concerned?（）
A.Fire point
B.Flash point
C.Specific gravity
D.viscosity
