【名词&注释】
螺旋桨(propeller)、动力装置(power plant)、涡轮增压器(turbocharger)、活塞杆填料、精度高(high precision)、动力机械(power machinery)、耗油率、耗油量(oil consumption)、不一定(not always)、规定值
[单选题]In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of ().
A. oil
B. sea water
C. air
D. fresh water
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学习资料:
[单选题]某船主机有效功率为10000kW,螺旋桨收到功率为98O0kw,螺旋桨推力功率为600OkW,发电机使用功率为600kW,主机耗油率为170g/kW•h,发电机耗油率为195g/kw•h,锅炉耗油量(oil consumption)为1.2t/d,则动力装置耗油率为()g/kW•h。
A. 0.1867
B. 0.1905
C. 0.3112
D. 0.1700
[单选题]MANB&W型柴油机活塞杆填料函工作环的平面间隙和环端间隙超过规定值的()时,应当换新。
A. A.10%
B. B.30%
C. C.50%
D. D.80%
[单选题]废气涡轮增压器是作高速回转的精密动力机械,使其平衡、无振动的高速运转的条件是()。Ⅰ.转子无变形;Ⅱ.转子平衡精度高;Ⅲ.增压器对中性好;Ⅳ.轴承无损伤;Ⅴ.维护管理好。
A. Ⅲ+Ⅳ
B. Ⅰ+Ⅲ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅲ+Ⅳ
[单选题]按轴系合理校中原理校中时,各轴承的连线是()。
A. 直线
B. 曲线
C. 折线
D. 不一定(not always)
[单选题]Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the ().
A. intake stroke
B. exhaust stroke
C. power stroke
D. compression stroke
[单选题]The overspeeding of the diesel engine driving an electric generator could cause ().
A. low voltage trip to trip
B. reverse power trip to trip
C. damage to windings
D. excessive exhaust temperature
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