单选题If a diesel engine rotates slowly when cranked, but does not fire, the（）Afuel control rack had admitted excessive fuelBengine speed does not match the fuel rack settingCengine has failed to reach its firing speedDstarter pinion and ring gear contact is not correct
单选题
If a diesel engine rotates slowly when cranked, but does not fire, the（）
A
fuel control rack had admitted excessive fuel
B
engine speed does not match the fuel rack setting
C
engine has failed to reach its firing speed
D
starter pinion and ring gear contact is not correct
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