【名词&注释】
轮廓线(contour)、机械式(mechanical)、爆发压力表(explosive pressure gauge)、主管机关(competent authorities)
[单选题]有毒液体物质残余物排放时，对于自航船船速要求是?()
A. 至少7kn
B. 至少4kn
C. 少于7kn
查看答案&解析
举一反三：
[单选题]当视图中的轮廓线与重合断面的轮廓线重合时，视图中的轮廓线应( )画出，( )中断。
A. 不连续/应
B. 用双点画线/不
C. 连续/不
D. 用细实线/不
[单选题]Which of the following factors will affect the strength and magnitude of the signal?
A. The number of the gear tooth
B. The clearance between the pole pieces.
C. The size of the sensor.
D. The MPUs thread
[单选题]示功器是( )，根据其工作原理不同示功器可分为( )。
A. 扭矩测量设备/机械式、气电式和电子式
B. 功率测量设备/机械式、气电式和电子式
C. 功率测量设备/机械式最大爆发压力表及电子式
D. 扭矩及功率测量设备/机械式、气电式和电子式
[单选题]必须配备经主管机关(competent authorities)批准的“船上油污应急计划”的油轮总吨至少是_______。
A. 150
B. 250
C. 350
D. 400
[单选题]Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.
A. The direction of pressure on the journal in four-stroke engine is continuously
B. positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C. four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D. Low-stroke engines usually consume less lube oil than four-stroke engines
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