【单选题】Combustion knock occurring in a diesel engine can be caused by _____.
A.
low coolant temperature
C.
high ambient temperature
D.
carbon buildup on the injector tips
【单选题】在Dreamweaer中,使用主浏览器预览网页的快捷键是( )
【单选题】Engine Coolant Temperature Sensor
【单选题】在 Dreamweaer 中,使用主浏览器预览网页的快捷键是
【单选题】在Dreamweaer中,使用主浏览器预览网页的快捷键是
【单选题】在同一转速下,发动机负荷率增大,吸入气缸的混合量增多,压缩终了时,压力和温度增高,使燃烧速度(),因此最佳点火提前角,随负荷的增大而应()。
【单选题】In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the _____.
A.
suction pressure regulator
B.
thermostatic bypass valve
D.
water level in the expansion tank
【单选题】河道整治包括控制和调整河势,裁弯取直,河道展宽和( ) 。
【单选题】Which of the following precautions must be taken electric impression heater is used to keep the coolant in a diesel engine during the time the engine is secured?
A.
the coolant temperature must be maintained at 180°c
B.
the thermostatic bypass valves must be manually opened before the engine is started
C.
the pressure cap must be removed while the ??
D.
electrical power to the heater must be secure