【名词&注释】
柴油机(diesel engine)、冷却水(cooling water)、可利用(can use)
[单选题]目前铁梨木艉轴承最好的代用材料是()。
A. 赛龙
B. 尼龙
C. 卡普龙
D. 层压胶木
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学习资料:
[单选题]现代柴油机排烟温度下降,不利于废气锅炉的余热利用,因此规定废气锅炉设计的标定工况是:废气锅炉排气进口温度t1为()℃,出口温度t2为()℃。
A. 400/300
B. 300/200
C. 255/188
D. 200/165
[单选题]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
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ或Ⅱ对
D. Ⅰ+Ⅱ
[单选题]During repair,lubrication lines and orifices must be ().
A. taken away
B. engaged
C. connected
D. sealed off
[单选题]The projection on a shaft designed to change circular motion into up and down or back and fore motion is called ().
A. wheel
B. crankshaft
C. running gear
D. cam
[单选题]The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ()
A. salinity is abnormally high
B. steam demand is too high
C. water level is abnormally low
D. feedwater flow is low
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