[单选题]柴油机气缸盖的结构特点是()。Ⅰ.结构复杂;Ⅱ.阀件多;Ⅲ.孔道较多;Ⅳ.受热不均;Ⅴ.壁厚不均。
正确答案 :B
Ⅰ+Ⅲ+Ⅴ
[单选题]柴油机气缸盖产生裂纹的根本原因是()造成的。Ⅰ.过大的热应力;Ⅱ.应力集中;Ⅲ.热疲劳;Ⅳ.机械疲劳;Ⅴ.综合疲劳。
正确答案 :D
Ⅲ+Ⅳ
[单选题]活塞运动部件失中不仅加剧磨损,而且还会产生()等故障。
正确答案 :B
敲缸、拉缸
[单选题]测量发现,活塞在近上、下止点位置时,活塞在气缸中均偏左或均偏右的极端位置(活塞与气缸间隙为零,而一侧间隙最大),这是由于()原因所致。
正确答案 :B
导板与气缸中心线距离过大或过小
[单选题]带有匙形键槽且根部有适当圆角的单螺旋桨轴或艉轴,其检验间隔期规定为()。
正确答案 :C
4年
[单选题]Care and cleanliness are required when installing diesel fuel filters ().
正确答案 :C
both of the above
[单选题]It is very necessary that each cylinder () before the charged air is compressed.
正确答案 :C
be scavenged
[单选题]The sequence of parts in a generally used fuel oil supply system for a main engine is ()(1)tanks in the double bottom(2)centrifuges(3)service tank(4)settling tank(5)viscosity regulator
正确答案 :B
(1)-(4)-(2)-(3)-(5)
[单选题]The shells are secured by means of bearing caps and studs, the necessary clearance being provided by means of () of different thickness.
正确答案 :A
shims
[单选题]Engine displacement is equal to the cylinder ().
正确答案 :B
area times the stroke, times the number of cylinders
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