单项选择题
A.plugging gooseneck tank vents to prevent accident overflow
B.maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C.sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D.maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship
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?（）
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 （）
单项选择题 The temperature of the fuel oil received during bunkering operation is critical in determining the （）