正确答案: B
耗损故障期的故障率是时间t的递减函数
题目:对耗损故障期的错误表述是()。
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学习资料的答案和解析:
[单选题]海船燃气动力装置中效率最高的是()。
低速柴油机
[单选题]在进行船舶动力装置设计时,为了找出合理利用余热的途径,必须考虑()。Ⅰ.整个船舶的能量平衡;Ⅱ.各个耗能设备的热平衡
Ⅰ十Ⅱ
[单选题]航行中,主柴油机发生拉缸事故,依据拉缸程度、海况等情况分别可采取()的应急措施。Ⅰ.继续航行;Ⅱ.停车;Ⅲ.吊缸检修;Ⅳ.简单的减缸航行;Ⅴ.完全减缸航行。
Ⅱ+Ⅲ+Ⅳ+Ⅴ
[单选题]某些新型大型低速柴油机的气缸盖上,设有用来拆卸缸盖螺帽的液压装置(液压环)和配备了专用环形六角扳手,该扳手的作用是()。
液压装置失效时,用来松开缸盖螺帽
[单选题]对使用液压撑杆螺栓的正置式主轴承,因其一端顶在轴承盖上,另一端顶在()上,所以在上紧贯穿螺栓之前,必须先()全部撑杆螺栓。
机架/松开
[单选题]A distance piece, with ground faces, known as a compression plate, may be interposed between the rod and the beating housing, its thickness being chosen to ensure the correct ().
compression ratio
[单选题]Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of ().
lube oil vapors in the crank case
[单选题]Lube oil pumps taking suction from the sump of most small marine engines are usually ().
of the positive displacement type
[单选题]Lube oil filters remove contaminants more efficiently if the oil being filtered is ().
heated to reduce viscosity