【名词&注释】
工作压力(working pressure)、工作量(workload)、故障率(failure rate)、水蒸气分压(steam partial pressure)
[单选题]航行中船舶推进系统发生故障,为了准确地确定修理范围、修理项目、修理方案及其工作量,修理前必须进行()。
A. 拆卸
B. 各种检验
C. 各种测量
D. 零件无损探伤
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学习资料:
[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]废气锅炉出口排烟温度t2不应低于露点,排气露点与()有关。Ⅰ.废气锅炉蒸汽工作压力;Ⅱ.燃油的含硫量;Ⅲ.排气中的水蒸气分压(steam partial pressure)
A. Ⅰ+Ⅱ
B. Ⅱ+Ⅲ
C. Ⅰ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]() at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.
A. A relief valve
B. An alarm
C. A pressure gauge
D. A non-maim valve
[单选题]A separate piston cooling system is used to limit any contamination () piston cooling glands() the piston cooling system only.
A. between;to
B. either;or
C. from;to
D. neither;nor
[单选题]Fresh water is used for the cooling of cylinder jackets and () of the marine diesel engine.
A. cylinder covers
B. lubricating space
C. crosshead
D. exhaust manifold
[单选题]Poor combustion in a diesel engine can be caused by ().
A. high compression pressure
B. low intake air temperature
C. low exhaust pressure
D. high scavenge air pressure
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