[单选题]已知某船排水量为2O000t,主机有效功率为10O00kW,主机重量为350t,动力装置总重量为8O0t,则该船主机单位重量为()kg/kW。
正确答案 :A
35
[单选题]劣质渣油中含有(),使用中使烟灰增加且具有粘性,是烟灰发生沉积的重要原因()。Ⅰ.灰分;Ⅱ.残炭;Ⅲ.硫分
正确答案 :D
Ⅰ+Ⅱ+Ⅲ
[单选题]中国船级社要求营运船舶的曲轴臂距差为()时,应限期修理。
正确答案 :C
>0.25S
[单选题]主机底脚螺栓松动则可能导致()。Ⅰ.垫块磨损;Ⅱ.机座局部下沉;Ⅲ.曲轴变形;Ⅳ.主机振动。
正确答案 :D
Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]赛龙艉轴承材料具有弹性好、()和不会剥落的特点,但导热性差和不耐高温。
正确答案 :D
耐磨、耐蚀
[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may not be ().
正确答案 :D
turning gear being still o
[单选题]The cooler as the liquid becomes, ().
正确答案 :A
the faster it will evaporate
[单选题]The cylinder covers and the liners are bolted together by means of studs () the cylinder frames.
正确答案 :D
screwed into
[单选题]The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means ()
正确答案 :C
be equal to
[单选题]Friction, engine wear and oil consumption in a diesel engine are directly related to the ().
正确答案 :D
viscosity of the oil
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