正确答案: D
A+B+C
题目:起航时间的长短与()有关。
查看原题 查看所有试题
学习资料的答案和解析:
[单选题]要充分利用排气余热而降低废气锅炉出口温度t2,同时还应保证锅炉受热面必需的温度,该温差是()。Ⅰ.排气与给水的温度t2-tw;Ⅱ.排气与蒸汽的温度t2一ts
Ⅰ+Ⅱ
[单选题]吊缸主机检修时,应当(),以防止伤人和损坏机件。
合上盘车机并在主机操纵部位悬挂警告牌
[单选题]活塞运动部件失中的原因主要是()。
配合件磨损
[单选题]目前铁梨木艉轴承最好的代用材料是()。
赛龙
[单选题]Shims of different thicknesses are inserted between the shells to enable adjustment of ().
the bearing clearances
[单选题]The auxiliary engine and a cgenerator can be connected with ().
coupling
[单选题]Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?()
Cooling water flow through after-coolers
[单选题]In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in ().
two piston strokes in a two-stroke/cycle engine