【名词&注释】
磨损率(wear rate)、气缸套(cylinder liner)、压力表(pressure gauge)、穿透性裂纹、不符合(inconformity)、符合要求(meet the requirement)、柴油机燃烧室(combustion chamber of diesel engine)、冷却水压、曲轴箱油(crankcase oil)
[单选题]活塞运动部件失中的原因主要是()。
A. 配合件磨损
B. 发生故障
C. 装配精度低
D. 零部件制造精度低
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学习资料:
[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]柴油机镀铬气缸套正常磨损率应在()mm/kh范围内。
A. 0.1~0.3
B. 0.05~0.1
C. 0.01~0.03
D. 0.005~0.01
[单选题]当轴系同轴度测量值δ总<δ总max,φ总<φ总max时,表明轴系的()。
A. 同轴度符合要求
B. 同轴度不符合要求
C. 偏差度符合要求
D. 同轴度符合要求与否尚不定
[单选题]Exhaust temperature increases in all cylinders, the possible cause may be()(1) increased scavenging air temperature(2) air in fuel pumps and fuel valves(3) fouling of air and gas passages
A. (1)+(2)
B. (1)+(3)
C. (2)+(3)
D. (1)+(2)+(3)
[单选题]The diffuser prevents pressure pulses from one cylinder () another during operation.
A. to interfere with
B. interfering with
C. to help scavenging
D. helping scavenging
[单选题]A thrust block is designed to().
A. absorb the shock of wave pressure at the bow
B. be placed between the engines and the foundation to absorb the vibration
C. transmit the thrust of the engine to the propeller
D. transmit the thrust of the propeller to the vessel
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