【导读】
必典考网发布2022海船船员考试题库船舶动力装置题库实战模拟每日一练(09月11日),更多船舶动力装置题库的每日一练请访问必典考网海船船员考试题库频道。
1. [单选题]利用液压拉伸器上紧贯穿螺栓时,如果拉伸器的油压仅达到上紧压力的50%时泄油孔就出现漏油现象,这种现象可能是()。
A. 上密封环失效
B. 下密封环失效
C. 液压油黏度不合适
D. 上密封环失效或下密封环失效
2. [单选题]废气涡轮增压器使柴油机的功率增加一倍,而重量只增加()。
A. 30%
B. 20%
C. 10%
D. 5%
3. [单选题]单轴系的特点是()。Ⅰ.直接传动;Ⅱ.结构简单可靠;Ⅲ.便于操纵;Ⅳ.便于维护管理;Ⅴ.建造费用低。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
4. [单选题]The position of the interface between oil and water within the centrifuge is achieved by the use of ().
A. gravity disc
B. centrifugal bowl
C. a stack of discs
D. main sealing ring
5. [单选题]An indication of a diesel engine air intake being partially clogged, is ().
A. low firing pressure and low exhaust temperatures
B. low firing pressure and normal exhaust temperatures
C. high firing pressure and low exhaust temperatures
D. high firing pressure and high exhaust temperature