【名词&注释】
粗糙度(roughness)、超负荷(overload)、柴油机气缸套(engine cylinder liner)、小范围(small range)
[单选题]For an ordinary modem marine four-stroke engine the inlet valves close ().
A. after TDC
B. before TDC
C. after BDC
D. before BDC
查看答案&解析
查看所有试题
学习资料:
[单选题]在有充分氧气存在时,烟垢的可燃成分在高温下自由蒸发,被火花或火焰点燃,在废气锅炉烟道内保持小范围(small range)和有限的火源,称为()。
A. 高温着火
B. 氢着火
C. 铸铁着火
D. 小的烟垢着火
[单选题]柴油机气缸套产生拉缸工艺上的原因是()造成。Ⅰ.润滑不良;Ⅱ.工作表面的粗糙度低;Ⅲ.超负荷;Ⅳ.气缸套内圆表面圆度误差过大;Ⅴ.活塞运动装置对中性差。
A. Ⅱ+Ⅴ
B. Ⅰ+Ⅳ+Ⅴ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ
D. Ⅰ+Ⅱ+Ⅳ
[单选题]柴油机在运行中一旦发生连杆螺栓断裂则可能导致()损坏。Ⅰ.活塞、连杆;Ⅱ.缸套;Ⅲ.机架;Ⅳ.曲轴。
A. Ⅰ+Ⅲ+Ⅳ
B. Ⅰ+Ⅱ+Ⅲ+Ⅳ
C. Ⅰ+Ⅱ+Ⅳ
D. Ⅱ+Ⅲ
[单选题]During the suction stroke, the piston is moving ().
A. inwards
B. outwards
C. downwards
D. upward
[单选题]A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the().
A. areas where special materials are used
B. hazardous areas
C. location of emergency repair equipment
D. type and strength of materials used
本文链接:https://www.51bdks.net/show/dqg5d3.html