正确答案: B
仅Ⅱ对
题目:现代柴油机的余热情况有较大变化()。Ⅰ.废气的能量质量下降,可利用回收的能量减少;Ⅱ.空气冷却器冷却水带走的能量质量和数量增加
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学习资料的答案和解析:
[单选题]对筒状活塞式柴油机,在未装活塞环的条件下,活塞位于近上、下止点位置时,活塞裙部与气缸内孔单边最小间隙应不小于()。
该处总间隙的25%
[单选题]拆下来的增压器转子一般应该(),以防止()。
立放/变形
[单选题]Bearing knocks are likely to occur from ().
bearing wear
[单选题]Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the () and a recirculation system lubricating the running gear and cooling the piston.
cylinder liners and piston rings
[单选题]The crankshaft of diesel engine is supported by ().
main bearing
[单选题]The main factor which determines the output of each cylinder is ()
the cylinder bore