A.changing filter elements would not interrupt engine operation
B.filtering occurs twice in each pass of oil through the system
C.clogging will not occur
D.dropping pressure is half of that through a single filter unit
第1题
A.the same indicated horsepower as a four-stroke/cycle engine
B.twice the indicated horsepower as a four-stroke/cycle engine
C.one half the indicated horsepower as a four-stroke/cycle engine
D.one power stroke for every two crankshaft revolutions
第2题
A.worn piston rings
B.installation of undersized sealing rings
C.operating the engine at low loads
D.restricted cooling water passages
第3题
A.fuel line connections to the cylinder injection valves
B.gasket surfaces of the fuel oil filters
C.discharge fittings of the fuel injector pumps
D.suction side of the fuel oil transfer pump
第4题
A.cylinder compression pressure may not be high enough
B.cylinder compression temperature may be too high
C.fuel oil injection pressure may not be high enough
D.scavenge and purge process is incomplete
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