单项选择题
A.length of the crankshaft
B.volume of the clearance space
C.weight of piston
D.length of the stroke
单项选择题 (Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（）
单项选择题 Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?（）
单项选择题 When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）