# Engineering Mechanics

In: Other Topics

Submitted By sugarchuchu
Words 912
Pages 4
A homogeneous 800 kg bar AB is supported at either end by a cable as shown. Calculate the smallest area of each cable if the stress is not to exceed 90 MPa in bronze and 120 MPa in steel. | |
21. Area of bronze cable a.43.6 mm2 | c. 46.3mm2 | b.32.7 mm2 | d. 37.2mm2 |
22. Area of steel cable a.43.6 mm2 | c. 46.3mm2 | b.32.7 mm2 | d. 37.2mm2 |
23. An aluminum rod is rigidly attached between a steel rod and a bronze rod as shown. Axial loads are applied at the positions indicated. Find the maximum value of P that will not exceed a stress in steel of 140 MPa, in aluminum of 90 MPa, or in bronze of 100 MPa.

a. 10 kN | c. 14 kN | b. 36 kN | d. 20 kN |
24. What force is required to punch a 20-mm-diameter hole in a plate that is 25 mm thick? The shear strength is 350 MN/m2. a. 274.9 kN | c. 110 kN | b. 1099.6 kN | d. 549.8 kN |
In the clevis shown, find the minimum bolt diameter and the minimum thickness of each yoke that will support a load P = 14 kips without exceeding a shearing stress of 12 ksi and a bearing stress of 20 ksi.

25. Diameter of bolt a. 0.4061 in | c. 0.8618 in | b. 0.431 in | d. 0.812 in |
26. Thickness of yoke a. 0.4061 in | c. 0.8618 in | b. 0.431 in | d. 0.812 in |
27. The wall thickness of a 4-ft-diameter spherical tank is 5/6 inch. Calculate the allowable internal pressure if the stress is limited to 8000 psi. a. 104.17 psi | c. 208.33 psi | b. 416.67 psi | d. 2500 psi |
A saturated 100 cm3 clay sample has a natural water content of 30%. It is found that the shrinkage limit occurs when the water content is 19%. If the specific gravity of soil is 2.70, compute the following:
28. Shrinkage ratio a. 1.78 | c. 1.68 | b. 1.94 | d. 1.60 |
29. Volume of sample when the water content is 15% a. 85 cm3 | c. 40.5 cm3 | b. 81 cm3 | d. 83.61 cm3 |
30. Mass of dry soil sample a. 176.67 g | c. 209.90 g | b....

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