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MATS1101 - Engineering Materials and Chemistry - T3 2025

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The recrystallisation temperature lies within which temperature range?

list of different temparatures and strength

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Cold rolled brass is cut into different samples and they are heated for one hour at various temperatures, and their strengths tested, as given in the table below. The recovery temperature lies within which temperature range?

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The recrystallisation temperature lies within which temperature range?

list of different temparatures and strength

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Cold rolled brass is cut into different samples and they are heated for one hour at various temperatures, and their strengths tested, as given in the table below. The recovery temperature lies within which temperature range?

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You are going to bend a steel rod through an angle of 90o. It is often necessary to heat the rod locally in the vicinity of the bend in order to complete the bend. What might be the most important disadvantage of heating the metal to complete the bend?
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Imagine if cold-rolled aluminium sheet was heated in an oven at 300o C for 2 hours (the recrystallisation temperature of aluminium is about 150oC). Which of the following is not true?
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Why is an incorrect hardness value obtained when the indentation is made very close to a preexisting indentation?
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The surface of a casting is often machined at locations where other components are attached or where close fitting components are inserted. Give two reasons why this might be done.
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This graph shows measurements of the absorbance of light for solutions containing different concentrations of Fe3+. Select the one statement below which best describes the graph. 

sample graph

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The graph below is a calibration curve for determining the concentration of Cu2+ from light absorbance at a wavelength of 610 nm. This calibration curve was created in the same way as the one involving Fe2+ you will generate in this experiment.

If solution of copper has an absorbance of 1.058 at 610 nm, what was the concentration Cu2+ in the solution?

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