A、A.≥0.5%CH4,≥0.5%CH4,<0.5%CH4
B、B.≥1.5%CH4,≥1.5%CH4,<1.5%CH4
C、C.≥1.0%CH4,≥1.0%CH4,<1.0%CH4
D、D.≥1.5%CH4,≥2.0%CH4,<1.5%CH4
答案:B
A、A.≥0.5%CH4,≥0.5%CH4,<0.5%CH4
B、B.≥1.5%CH4,≥1.5%CH4,<1.5%CH4
C、C.≥1.0%CH4,≥1.0%CH4,<1.0%CH4
D、D.≥1.5%CH4,≥2.0%CH4,<1.5%CH4
答案:B
A. 加强巷道支护
B. 预防性卸压
C. 防冲监测
A. 1
B. 2
C. 3
D. 4
A. 正确
B. 错误
A. A.≥1.0%CH4,≥1.5 %CH4,<1.0%CH4
B. B.≥1.5%CH4,≥1.5%CH4,<1.5%CH4
C. C.≥0.5%CH4,≥1.0%CH4,<0.5%CH4
D. D.≥1.5%CH4,≥2.0%CH4,<1.5%CH4
A. 报警
B. 断电
C. 曲线
D. 馈电异常
A. 5
B. 10
C. 15
A. A.馈电状态监测
B. B.报警
C. C.显示
D. D.存储、打印报表
A. 当甲烷浓度下降到复电点时
B. 当排除故障恢复正常运行时
C. 当送电1min后正常运行时
A. A.≥0.5%CH4,≥0.5%CH4,<0.5%CH4
B. B.≥1.5%CH4,≥1.5%CH4,<1.5%CH4
C. C.≥1.0%CH4,≥1.5%CH4,<1.0%CH4
D. D.≥1.5%CH4,≥2.0%CH4,<1.5%CH4
A. A.26℃
B. B.30℃
C. C.32℃
D. D.34℃