【名词&注释】
柴油机(diesel engine)、船舶动力装置(marine power plant)、核动力装置(nuclear power plant)、蒸汽动力装置(steam power plant)、不一定(not always)、汽轮机装置(steam turbine plant)、燃气动力装置(gas power plant)
[单选题]中速柴油机的最低稳定转速不高于标定转速的()%。
A. 15
B. 30
C. 40
D. 45
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学习资料:
[单选题]船舶动力装置往往以推进装置的类型进行分类,可分为()。
A. 蒸汽动力装置、燃气动力装置(gas power plant)、核动力装置
B. 低速柴油机装置、中速柴油机装置、高速柴油机装置
C. 汽轮机装置(steam turbine plant)、柴油机装置
D. A+B
[单选题]液压拉伸器活塞顶部设有泄放旋塞,其主要的作用是()。
A. 在使用时,用来观察有无漏油现象
B. 用来判断密封环有无失效
C. 加压前用来泄放油中的空气
D. 压力过高时放油减压
[单选题]某曲柄的两主轴承在水平平面内位置偏左,曲轴轴线呈左拱形,则其Δ-()。
A. >0
B. <0
C. =0
D. 不一定
[单选题]废气涡轮增压器使柴油机的功率增加()倍。
A. 0.5
B. 1
C. 1.5
D. 2
[单选题]铁梨木轴承产生()时应予以部分或全部换新。
A. 变形与开裂
B. 磨损
C. 轴承间隙超差
D. 腐蚀
[单选题]In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the ().
A. crosshead
B. crankpin
C. crank journal
D. gudgeon pi
[单选题]Low compression of diesel engine may result from ()
A. a worn cylinder
B. broken piston rings
C. any of A and B
D. none of the above
[单选题]The pump has a constant stroke and the amount of fuel delivered is regulated by rotating () which has a specially arranged helical groove cut into it.
A. the pump cylinder
B. the pump cam
C. the pump plunger
D. the pump miler
[单选题]Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the ().
A. cetane number
B. pour point
C. viscosity temperature
D. quality of the oil
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