正确答案: C
产生弹性变形
题目:液压拉伸器是利用油压使螺栓()后轻易地上紧或松脱螺栓。
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学习资料的答案和解析:
[单选题]气缸盖底面裂纹一般产生在底面阀孔边缘和阀孔之间,即有()的部位。
应力集中
[单选题]压铅法测量轴承间隙应采用()根铅丝。
2~3
[单选题]关于螺旋桨轴的连接方式,下列说法不正确的是()。
D.油压无键套合连接的桨锥孔与轴锥配合不必刮研
[单选题]按舵叶截面形状分为()舵。Ⅰ.平板形;Ⅱ.叶形;Ⅲ.机翼形;Ⅳ.流线型;Ⅴ.直线形。
Ⅰ+Ⅳ
[单选题]After ensuring that the () is correct the bearing clearance should be checked.
nip
[单选题]If there is water in fuel oil, the revolution of the engine will ().
decrease
[单选题]Sea water is not directly used as a coolant for engines because of its ().
corrosive action
[单选题]The piston ring grooves for a standard engine are ()
flame hardened against wear