In the following figure, the frame is subjected to the load of 7 kN. If the allowable shear stress for the material is [img=38x17]1803275fa15590d.png[/img] = 40 MPa. Pin A is subjected to double shear, where pin B is subjected to single shear. The required diameters of the pins at A and B are ( ) and ( ), respectively. [img=544x431]1803275fb0173d5.jpg[/img]
A: 12mm, 22mm
B: 14mm, 24mm
C: 10mm, 20mm
D: 15mm, 20mm
A: 12mm, 22mm
B: 14mm, 24mm
C: 10mm, 20mm
D: 15mm, 20mm
举一反三
- 正常成人右下肺动脉主干直径一般为:() A: ≤ 5 mm B: ≤ 8 mm C: ≤ 10 mm D: ≤ 15 mm E: ≤ 20 mm
- 配制钢筋最小净距为48 mm和截面尺寸为200 mm×300 mm的混凝土构件(C30以下),应选用的石子粒级为( )。 A: 5 mm~16 mm B: 5 mm~31.5 mm C: 5 mm~40 mm D: 20 mm~40 mm
- 油润滑轴承内侧到箱体内壁之间的距离( ) A: 3~5 mm B: 10~15 mm C: 3~15 mm D: 15~20 mm
- 某轴尺寸为 [img=145x52]180379f297dfb09.png[/img]mm,遵守边界为 ,边界尺寸为 mm,实际尺寸为Φ20 mm时,允许的形位误差为 mm。 A: 最大实体边界 B: 最大实体实效边界 C: Φ20mm D: Φ19.7mm E: 0 F: 0.3
- 某轴尺寸为 [img=145x52]17de8b89608a60b.png[/img]mm,遵守边界为 ,边界尺寸为 mm,实际尺寸为Φ20 mm时,允许的形位误差为 mm。 A: 最大实体边界 B: 最大实体实效边界 C: Φ20mm D: Φ19.7mm E: 0 F: 0.3