第3题: [单项选择]Dirt lodged on the nozzle valve seat of a fuel injection nozzle will cause() A. erosion and cratering of the nozzle orifices B. fuel leakage into the nozzle drain line C. fuel leakage before and after injection D. insufficient fuel delivery though that nozzle 参考答案:C
第32题: [多项选择]钎探是根据()来判断土的软硬情况及有无古井、古墓、洞穴、地下掩盖物等。 A. 钎孔大小 B. 用力大小 C. 锤击次数 D. 入土深度 E. 入土难易程度 参考答案:C, E 答案解析:对同一工程而言,钎孔大小、用力大小、入土深度都是一致的。只有锤击次数、入土难易程度与土层实际情况有关。