单项选择题
某可修产品发生5次故障。故障前工作时间(单位:h)分别为:516,178,348,465,493。
A.0.368 B.0.378 C.0.388 D.0.398
A.e-2 B.e-1 C.e-0.005 D.e-200
A.300 B.3000 C.3700 D.37001
A.A级 B.B级 C.C级 D.D级 E.E级
A.0.0033 B.0.0029 C.0.0025 D.0.0022
A.MTTF B.MTTR C.λ D.以上都不对
A.500h B.400h C.300h D.200h
A.2000h B.1500h C.1000h D.500h
A.小于40h B.52.68h C.46.37h D.82.4h
A.24 B.18 C.42 D.81
A.0.922 B.0.078 C.0.874 D.0.126