单项选择题
The indications of a scavenge fire are excessive black smoke, （） and peeling from scavenge trunking.
A.turbo-chargers surge B.spark seen from the drains C.paint blistering D.all above are right
单项选择题 The indicated power of an engine can be obtained by taking the （）.
单项选择题 The ignition of the fuel in diesel engine is caused by the （） of compression of the air previously admitted into the cylinders.
单项选择题 The hydraulic （） is used to control engine speed.
