单项选择题
A.low exhaust back pressure
B.air in the fuel system
C.gasket blow-by or leakage
D.incorrect assembly of idler springs
单项选择题 A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）
单项选择题 The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）
单项选择题 Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve?（）