【名词&注释】
安全系数(safety factor)、原材料(raw material)、船舶动力装置(marine power plant)、中心线(center line)、环境设备(environmental facility)
[单选题]艉轴承间隙一般是在距艉轴承后端面()处所测的径向间隙。
A. 200mm
B. 150mm
C. 100mm
D. 500mm
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学习资料:
[单选题]影响船舶动力装置可靠性的设计因素有()。
A. 维修制度
B. 部件的连接方式
C. 原材料
D. 使用环境
[单选题]影响船舶动力装置可靠性的制造因素有()。
A. 设备的可维修性
B. 质量管理
C. 维修制度
D. 部件的安全系数
[单选题]铁梨木尾轴后轴承的长度不应()。
A. 小于尾轴轴颈的2,5倍
B. 大于尾轴轴颈的2.5倍
C. 小于尾轴轴颈的4倍
D. 大于尾轴轴颈的4倍
[单选题]在进行舵系固定件同轴度检验时,拉出舵系固定件中心线的钢丝线后,测量各舵承孔至钢丝线的()距离,以确定各舵承孔的同轴度偏差。
A. 上下、左右
B. 前后、左右
C. 上下、前后
D. 空间
[单选题]If over a period of weeks the air-box pressure of a turbo-charged, diesel engine, operating at full load, appears to be dropping off, the cause can be ().
A. open air-box drains
B. loss of cooling water to the diffuser
C. gradual fouling of the air filters
D. improperly timed exhaust valve
[单选题]Turbulence in a diesel engine cylinder is of major importance in providing ().
A. proper fuel metering
B. complete fuel/air mixing
C. minimal fuel penetration
D. proper fuel timing
[单选题]Maximum horsepower of a diesel engine is attained ().
A. when the engine RPM is pulled down by overload
B. at rated engine RPM
C. at 95 % of rated engine RPM
D. at 95 % of a properly adjusted governor RPM with the engine under full load
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