【名词&注释】
故障率(failure rate)
[单选题]按合理校中原理校中时,下述正确的是()。
A. δ=0.05~0.10mm/m,φ=0.10~0.15mm/m
B. 各轴承的负荷在允许值内
C. 各轴承的负荷在允许值内且合理分配,轴段内的应力、弯矩、转角均在允许值内或取合理数值
D. 都不对
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[单选题]故障率λ(t)是针对到时刻t尚能正常工作的产品数而言的;().Ⅱ.密度函数f(t)是针对开始时刻的产品数而言的
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]() is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A. An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
[单选题]Each cylinder is closed at the top by a (), made of a special heat-resistant steel.
A. cylinder liner
B. coupling flange
C. cylinder cover
D. piston crow
[单选题]The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as ().
A. indicated horsepower
B. brake horsepower
C. net horsepower
D. friction horsepower
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