【导读】
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1. [单选题]使用含有()的燃油添加剂,可使烟灰失去粘性,导致烟灰沉积趋势的减少。Ⅰ.氧化铜;Ⅱ.氧化铁
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ+Ⅱ
D. Ⅰ,Ⅱ都不对
2. [单选题]水润滑式艉轴工作轴颈包覆(),非工作轴颈包覆()。
A. 铜套/塑料
B. 橡胶套(rubber tubing product)/塑料
C. 玻璃钢套/橡胶
D. 铜套/玻璃钢
3. [单选题]水润滑式艉轴的()包覆铜套,以防止腐蚀。
A. 工作轴颈
B. 非工作轴颈
C. 2/3轴颈长度上
D. 轴颈全长
4. [单选题]新制艉轴铜套的厚度应为()。
A. 0.02d+5mm
B. 0.015d+3.5mm
C. 0.03d+7.5mm
D. 0.01d+2mm
5. [单选题]航行时,水润滑艉轴承填料密封装置应将压盖螺栓(),停航时将压盖螺栓()。
A. 旋松/旋松
B. 旋松/上紧
C. 上紧/上紧
D. 上紧/旋松
6. [单选题]After fitting back in place the gear wheels, dont forget () them.
A. to grease
B. greasing
C. oiling
D. lubricating
7. [单选题]Increased air () will raise scavenge efficiency and allow a greater mass of air to be compressed; more fuel may now be burned giving an increased power.
A. specific volume
B. density
C. viscosity
D. calorific value
8. [单选题]Main bearings are required to support the crankshaft at each ().
A. end
B. web
C. pin
D. journal
9. [单选题]The high pressure in fuel injection system of the diesel engine is produced by the ().
A. injector pump
B. fuel injector
C. governor
D. turbocharger
10. [单选题]For Vee-form engines, () is shaped to given two slopping surface on which () are placed at the correct relative angle to each other.
A. the bottom of the column;the cylinder blocks
B. the top of the column;the cylinder heads
C. the top of the column;the cylinder blocks
D. the bottom of the column;the cylinder head