A2.0 inch diameter rod supports a 1400 pound load. What is the magnitude of the

Question

A2.0 inch diameter rod supports a 1400 pound load. What is the magnitude of the stress hat is developed the rod? a. 111.4 psi b. 446 psi c. 7.14 x 10 psi d. Impossible to know without knowing the 36. A steel rod with a gauge length of 2.0 inches is stretched to 2.01 inches long. What is the strain? strain (change in length) a. .005 in/in c Engineering strain cannot be calculated b. .01 in/in without knowing the diameter d. 01 in 37. The highest point on the stress-strain curve is know as a. Upper yield strength b. Proportional limit c. Yield strength d. Ultimate strength 38. What is an indication of ductility in a tensile test specimen? a. Elongation b. Necking c. d. Cup and cone fracture All of the above 39. In this type of hardness testing, a 5 or 10 mm ball is forced into a test specimen surface under 500 to 3000 kgf. The indentation is measured with a microscope. a. Rockwell b. Brinell c. Knoop d. Durometer 40. This hardness test gives results on a scale (A, B, C, etc.) that corresponds to the testing parameters (imdenter used and major load). a. Rockwell b. Brinell c. Knoop d. Durometer An example of a test that measures energy absorption (toughness) is: a. ASTM ES b. Charpy 41. c. Knoop d. Vickers c. Modulus of elasticity (Young's modulus d. Ductile to brittle transition temperature 42. The is a temperature where a material changes its response to impacts. a. Elastic limit b. Proportional limit Which of the following is NOT true of aluminum? a. Oxidizes easily 43. c Isductile d. Good conductor of electricity Tolerates exposure to strong alkaline solutions b. This type of casting process uses graphite molds. a. Gravity die casting (permanent mold Cold chamber die casting 44. d. Slip casting casting) Hot chamber die casting b.

Explanation / Answer

35. Answer = b)

Stress = Force/Area

Force = 1400 pound. Area = Pi*1*1 = 3.14 inch^2

Hence stress = 446psi.

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