b. hardness c. strengths and hardness d. and 50. Cementite a. is a combination o

Question

b. hardness c. strengths and hardness d. and 50. Cementite a. is a combination of b. 13% carbon 93.33% c. 13% carbon and 87% Iron d. 87% cementite and 87% ferrite ferrite cementite and 13% ferrite 51. which of the In a. cast iron following cases creep is an important consideration b. cycle water chain pipes c. gas turbine blades d. steam engine fl e. all of above the 52. Which of the following is non-destructive test? a. Charpy test b, Izod impact test c, tensile test d. upping test e. ray test 53. Which the hardest out of the a. is b. enite following? Pearlite c, ferrite d, cementite 54. ng is done a. to reduce carbon content b. to the c. change the d. to soften the structure to reduce materials for machining hardness 55. The fatigue strength of materials increases a. with providi b, by c, by providing scratches on the surface d. by notches stressing the materials

Explanation / Answer

Cementite is 6.67 % carbon and 93.33 % iron. It is an orthorhimbic crystal structure. It is also called as iron carbide.

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