单选题Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.AcontrollerBgovernorCinstrumentDapparatus
单选题
Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.
A
controller
B
governor
C
instrument
D
apparatus
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Which of the following problems is the main source of fuel pump and injection system malfunctions?A.Improper lubricationB.Air in the fuel systemC.Coated fuel linesD.Excessive vibration
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