【名词&注释】
发动机、柴油发电机(diesel generator)、工作能力(work ability)、不低于(no less than)
[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
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学习资料:
[单选题]影响发动机加速时问长短的因素是它的()。I.运行部件的质量惯性;Ⅱ.受热部件的热惯性
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ+Ⅱ
D. Ⅰ,Ⅱ都不对
[单选题]某产品在1万h内工作的可靠度R(t)=0.95,说明该产品()。Ⅰ.5%的产品可保持不低于(no less than)1万h的工作能力;Ⅱ.95%的产品可保持不低于(no less than)1万h的工作能力
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ或Ⅱ对
D. Ⅰ,Ⅱ都不对
[单选题]轴带发电机和柴油发电机相比具有的优点是()。Ⅰ.油耗低;Ⅱ.维护费少;Ⅲ.机舱噪声低
A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]Sediment collects in a tubular purifier ().
A. on top cover
B. on sides of bowl
C. in drain line on the discs
D. on the disc
[单选题]There is an injection pump for each cylinder, which is usually operated once every cycle by () on the camshaft.
A. a gear
B. a cam
C. a rod
D. a miler
[单选题]Proper atomization of fuel in diesel engine combustion chambers will ().
A. affect the injection pressure
B. improve combustion
C. reduce compression pressure
D. decrease power output
[单选题]What is an advantage of a steam turbine over a diesel for the main propulsion?()
A. Faster response from ahead to astern
B. Less fuel consumption
C. Cheaper initial installation cost
D. Less weight per unit of horsepower
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