【名词&注释】
经济性(economy)、船舶动力装置(marine power plant)、柴油机气缸套(engine cylinder liner)、弹簧测力计(spring loaded thrust meter)
[单选题]轴系若按轴承允许负荷原理校中,常采用的校中工艺方法是()。
A. 弹簧测力计(spring loaded thrust meter)法
B. 顶举法
C. 测法兰对上的偏中值
D. A或B或C
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学习资料:
[单选题]为了提高船舶动力装置的经济性,()部门应对整个动力装置进行综合分析。
A. 设计
B. 制造
C. 使用
D. A+B+C
[单选题]柴油机排气系统的背压与()。Ⅰ.废气流速的平方成正比;Ⅱ.与管径的4次方成反比
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]当柴油机气缸套产生较大拉痕、擦伤、磨台和过度磨损时,应拆下送厂采用()进行修理。Ⅰ.镀铬;Ⅱ.镗缸;Ⅲ.修理尺寸法;Ⅳ.喷焊;Ⅴ.恢复尺寸法。
A. A.Ⅰ+Ⅲ+Ⅳ+Ⅴ
B. B.Ⅰ+Ⅱ+Ⅴ
C. C.Ⅱ+Ⅲ+Ⅴ
D. D.Ⅰ+Ⅱ+Ⅲ
[单选题]In a diesel engine, fuel must be broken up into a spray of fine droplets to ().
A. increase its quality
B. obtain complete burning
C. reduce its weight
D. all of the above
[单选题]The main function of the lubrication system in to enable () of a film of oil between the moving parts.
A. the information
B. the formation
C. the scatter
D. the frictio
[单选题]The pressurized air is usually cooled to increase the charge air ().
A. viscosity
B. density
C. velocity
D. electricity
[单选题]The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the ().
A. crankshaft
B. piston
C. connecting rod
D. bearing
[单选题]The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by ().
A. direct action of cam shaft
B. compressed air pressure
C. hydraulic “push rods”
D. direct action of the main piston moving dow
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