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Materials Science A / Materiaalkunde A - 214

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Study the photo of the gear assembly carefully. Refer to the Case Study 1 PDF for the associated part numbers.

Kyk noukeurig na die foto van die ratsamestelling. Kyk na die Gevalstude 1 PDF vir die relevante onderdeelnommers.

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Study the photo of the gear assembly carefully. Refer to the Case Study 1 PDF for the associated part numbers.

Kyk noukeurig na die foto van die ratsamestelling. Kyk na die Gevalstude 1 PDF vir die relevante onderdeelnommers.

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Refer to part number (19) in the Case Study 1 PDF. An example cutaway image of the part is shown below along with a photo of a similar part to that as the one found in the drill. 

Verwys na onderdeelnommer (19) in die Gevalstudie 1 PDF. 'n Voorbeeld uitsnybeeld van die onderdeel word hieronder getoon saam met 'n foto van 'n soortgelyke onderdeel as wat in die boor gevind word.

Why are the outer races (outer rings) of this part made from hardened steel?

Hoekom word die buitenste laerringe van hierdie onderdeel van verharde staal gemaak?

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The cord guard (77) of the power cord is made of rubber. Why is rubber suitable for this part? (Consult the Case Study 1 PDF to find the part number). /

Die koordbeskermer (77) van die kragkoord is van rubber gemaak. Hoekom is rubber geskik vir hierdie onderdeel? (Kyk na die Gevalstudie 1 PDF om die onderdeelnommer te vind).

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Refer to part number (19) in the Case Study 1 PDF. An example cutaway image of the part is shown below along with a photo of a similar part to that as the one found in the drill. 

Verwys na onderdeelnommer (19) in die Gevalstudie 1 PDF. 'n Voorbeeld uitsnybeeld van die onderdeel word hieronder getoon saam met 'n foto van 'n soortgelyke onderdeel as wat in die boor gevind word.

Why are the outer races (outer rings) of this part made from hardened steel?

Hoekom word die buitenste laerringe van hierdie onderdeel van verharde staal gemaak?

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Study the photo of the gear assembly carefully. Refer to the Case Study 1 PDF for the associated part numbers.

Kyk noukeurig na die foto van die ratsamestelling. Kyk na die Gevalstude 1 PDF vir die relevante onderdeelnommers.

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Match the correct material with each part. The part number is provided in brackets (#).

Sit die regte materiaal by elke onderdeel. Die onderdeelnommer word in hakkies (#) gegee

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A Sn-Pb alloy that contains 68.7 wt% Sn is cooled very slowly to just below the eutectic isotherm at around 183 °C (you can therefore use the solubility limits labelled on the eutectic isotherm). What is the mass fraction of the eutectic microconstituent? Give your answer to 3 significant figures. Remember to select the correct units. 

’n Sn-Pb-allooi wat 68.7 wt% Sn bevat, word baie stadig afgekoel tot net onder die eutektiese isoterm teen ongeveer 183 °C (u kan dus die oplosbaarheidslimiete gebruik wat op die eutektiese isoterm gemerk is). Wat is die massafraksie van die eutektiese mikrokomponent? Gee jou antwoord op 3 beduidende syfers. Onthou om die regte eenhede te kies.

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A Sn-Pb alloy that contains 28.7 wt% Sn is cooled very slowly to just below the eutectic isotherm at around 183 °C (you can therefore use the solubility limits labelled on the eutectic isotherm). What is the mass fraction of the β phase? Give your answer to 3 significant figures. Remember to select the correct units. 

’n Sn-Pb-allooi wat 28.7 wt% Sn bevat, word baie stadig afgekoel tot net onder die eutektiese isoterm teen ongeveer 183 °C (u kan dus die oplosbaarheidslimiete gebruik wat op die eutektiese isoterm gemerk is). Wat is die massafraksie van die β-fase? Gee jou antwoord op 3 beduidende syfers. Onthou om die regte eenhede te kies.

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A Sn-Pb alloy that contains 34.9 wt% Sn is cooled very slowly to just below the eutectic isotherm at around 183 °C (you can therefore use the solubility limits labelled on the eutectic isotherm). What is the mass fraction of the α phase? Give your answer to 3 significant figures. Remember to select the correct units. 

’n Sn-Pb-allooi wat 34.9 wt% Sn bevat, word baie stadig afgekoel tot net onder die eutektiese isoterm teen ongeveer 183 °C (u kan dus die oplosbaarheidslimiete gebruik wat op die eutektiese isoterm gemerk is). Wat is die massafraksie van die α-fase? Gee jou antwoord op 3 beduidende syfers. Onthou om die regte eenhede te kies.

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