【名词&注释】
螺旋桨(propeller)、动力装置(power plant)、中心线(center line)、静平衡(static balance)、大幅度(greatly)
[单选题]发动机的长度可决定()。
A. 机舱的长度
B. 机舱的宽度
C. 船舶的宽度
D. B+C
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学习资料:
[单选题]采用贮备可以提高动力装置的可靠性,但是亦有可能使可靠性反而下降,这是因为()。Ⅰ.散热面积小,使温度大幅度(greatly)上升;Ⅱ.振动、冲击因素影响备件寿命
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]废气锅炉烟垢着火的热量主要传导给(),使锅炉系统不能正常工作,甚至损坏锅炉。
A. 循环水
B. 蒸汽
C. 废气
D. A+B+C
[单选题]某螺旋桨半径为2m,质量为800kg,经静平衡实验测附加重物的质量为2kg,其中系数K为1.5,请问该螺旋桨允许的不平衡质量为()。
A. 0.4kg
B. 0.8kg
C. 0.6kg
D. 1kg
[单选题]舵系固定件的中心线与船舶基线垂直,垂直度偏差不大于()。
A. 0.5mm/m
B. 1.0mm/m
C. 1.5mm/m
D. 2.0mm/m
[单选题]Increasing the temperature of a fuel will reduce its ().
A. viscosity
B. pressure
C. resistance
D. setting point
[单选题]The conclusion that mechanical efficiency is always () 100 percent is correct.
A. small than
B. more than
C. little than
D. less tha
[单选题]The lower end of each piston rod is reduced in diameter to fit a bore in the (), this being secured to the piston rod by a nut.
A. piston gudgeon pin
B. piston skirt
C. cross-head
D. cross-head pi
[单选题]In the combustion chamber, the part whose surface is exposed to the highest temperature is the ().
A. cylinder liner
B. cylinder cover
C. piston
D. exhaust valve
[单选题]The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as ().
A. indicated horsepower
B. brake horsepower
C. net horsepower
D. friction horsepower
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