18-19&21
Extracted text: 20. Determine the resultant reaction (kN) at A. A. 28.0 С. 39.6 D. 43.6 В. 32.4 21. Compute the maximum bending moment (kN-m) on bar AC. A. 52 В. 46 С. 65 D. 58
Extracted text: Situation - The beam BC shown is supported by a quarter- circular arc AC having a radius of 5 m. The frame is pin- supported at A, B and Č. The pins at A and B are in single shear while the pin at C is in double shear. Allowable shear stress of the pin is 120 MPa. w = 4 kN/m, P = 30 kN, a = 3 m. a 18. Determine the minimum diameter (mm) of the pin at B. А. 12 В. 20 С. 16 D. 18 19. Determine the minimum diameter (mm) of the pin at C. A. 18 В. 16 С. 22 D. 20