单项选择题
For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because （）.
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
单项选择题 An increase in the air inlet manifold pressure of a diesel engine will result in a/an （）.
单项选择题 The overspeeding of the diesel engine driving an electric generator could cause （）.
单项选择题 During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.
