单项选择题
Heavy residual fuel oils are heated prior to centrifuging to （）
A.reduce fuel weight
B.increase specific gravity
C.separate fuel from lube oil
D.reduce fuel viscosity
点击查看答案&解析
相关考题
-
单项选择题
In a diesel engine, blow-by is generally the result of worn（）
A.valve guides
B.oil control rings
C.valve seats
D.compression rings -
单项选择题
For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable（）
A.throughput
B.additive percent
C.cetane number
D.TBN number -
单项选择题
Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring（）
A.back
B.side
C.gap
D.bottom
