单项选择题
一个由5个部件组成的串联电子系统,5个部件的故障率分别为:λ1=0.0006/h,λ2=0.002/h,λ3=0.0015/h,λ4=0.0005/h,λ5=0.0004/h,则:
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
A.300 B.400 C.420 D.450
A.Ⅰ类 B.Ⅱ类 C.Ⅲ类 D.Ⅳ类
A.可靠度函数R(t)=e-λt B.可靠度函数R(t)=eλt C.累计故障分布函数F(t)=1-e-λt D.累计故障分布函数F(t)=1-eλt
A.0.005 B.0.004 C.0.003 D.0.002
A.A B.B C.C D.D
A.500h B.200h C.2000h D.5000h