单项选择题
A.Full power cannot be developed
B.The exhaust will contain black smoke
C.Complete combustion will be impossible
D.All of the above
单项选择题 If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）
单项选择题 Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?（）
单项选择题 Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）