【名词&注释】
动力装置(power plant)、填料函(stuffing box)、压力表(pressure gauge)、活塞杆填料、穿透性裂纹、等值线图法、柴油机燃烧室(combustion chamber of diesel engine)、冷却水压、频率计算法(frequency analysis method)、曲轴箱油(crankcase oil)
[单选题]活塞裙外圆与活塞杆外圆的同轴度偏差应不大于()。
A. 0.05mm
B. 0.10mm
C. 0.15mm
D. 0.20mm
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学习资料:
[单选题]汽轮机动力装置与燃气动力装置相比,其主要缺点是()。
A. 转速高
B. 效率低
C. 体积大
D. 噪声大
[单选题]柴油机运转中,根据()现象可迅速判断柴油机燃烧室(combustion chamber of diesel engine)零件是否产生穿透性裂纹。Ⅰ.冷却水压力表指针波动;Ⅱ.冲车时有水珠喷出;Ⅲ.缸壁面有锈痕;Ⅳ.膨胀水柜水位变化;Ⅴ.曲轴箱油(crankcase oil)位升高。
A. Ⅰ+Ⅳ+Ⅴ
B. Ⅰ+Ⅱ+Ⅴ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
D. Ⅱ+Ⅲ+Ⅳ
[单选题]活塞运动部件失中是指()。
A. 零部件失效
B. 活塞运动部件与固定件相互位置异常
C. 活塞运动部件与固定件装配精度下降
D. 产生拉缸故障
[单选题]活塞杆填料函安装在气缸底板中心孔中,具有()的作用。Ⅰ.密封扫气空气;Ⅱ.密封燃气;Ⅲ.除油污;Ⅳ.除积炭;Ⅴ.分隔。
A. A.Ⅰ+Ⅱ+Ⅴ
B. B.Ⅰ+Ⅴ
C. C.Ⅱ+Ⅴ
D. D.Ⅰ+Ⅲ+Ⅴ
[单选题]当船轴上的裂纹深度不大于轴径的5%,长度不大于轴径的10%时,可采用()修理。
A. A.修磨
B. B.金属扣合工艺
C. C.焊补
D. D.光车后镀铁
[单选题]实测迳流资料时,主要采用()方法推算设计年迳流量。
A. 等值线图法
B. 水文比拟法
C. 频率计算法(frequency analysis method)
[单选题]During the inspection, the starting air valves should be closed () the engine from turning.
A. to increase
B. to speed up
C. to prevent
D. to reduce
[单选题]Each cylinder liner on the marine medium speed engines ().
A. is usually cooled by sea water
B. can be replaced when worn out
C. is in direct contact with the water in the bore of the cylinder
D. can t expand when heated
[单选题]What is an advantage of diesel over steam turbine propulsion? ()
A. Less fuel consumption per SHP
B. Diesel fuel costs less than bunker C or its equivalent
C. Less routine maintenance required
D. Less weight per SHP
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