MMET 207 Exam III Questions With Correct Answers

MMET 207 Exam III Questions With Correct
Answers


1000 Al - CORRECT ANSWER✔✔-commercially pure aluminum (99%
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minimum)


2000 Al - CORRECT ANSWER✔✔-copper
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3000 Al - CORRECT ANSWER✔✔-manganese
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4000 Al - CORRECT ANSWER✔✔-silicon
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5000 Al - CORRECT ANSWER✔✔-magnesium
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6000 Al - CORRECT ANSWER✔✔-magnesium and silicon
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7000 Al - CORRECT ANSWER✔✔-zinc
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7000-F - CORRECT ANSWER✔✔-zinc; as fabricated
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,4000-W - CORRECT ANSWER✔✔-silicon; solution heat treated
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3000-O - CORRECT ANSWER✔✔-manganese; annealed
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5000-H12 - CORRECT ANSWER✔✔-magnesium; 1/4 strain hardened
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3000-H18 - CORRECT ANSWER✔✔-manganese; full strain harden
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What Aluminum series are heat treatable? - CORRECT ANSWER✔✔-
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2000, 6000, 7000
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What aluminum series are not heat treatable? - CORRECT ANSWER✔✔-
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1000, 3000, 4000, 5000
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2000-T3 - CORRECT ANSWER✔✔-copper; furnace solution heated,
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quenched and COLD WORKED | | |




6000-T4 - CORRECT ANSWER✔✔-magnesium and silicon; furnace
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solution heat treated, quenched and NATURALLY AGED
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7000-T6 - CORRECT ANSWER✔✔-zinc; furnace solution heat treated,
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quenched and FURNACE AGED| | |

, What are the physical properties of aluminum compared to other
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metals? - CORRECT ANSWER✔✔-lighter than all other engineering
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metals, high thermal and electrical conductivity, good corrosion
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resistance in atmospheric environment
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Aluminum has how much of the conductivity of pure copper? -
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CORRECT ANSWER✔✔-60% |




Which has a higher conductivity per unit mass, aluminum or copper? -
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CORRECT ANSWER✔✔-aluminum |




How is precipitation hardening done? - CORRECT ANSWER✔✔-
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temperature raised to about 800F, water quenched and then aged
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What does Fe do in aluminum? - CORRECT ANSWER✔✔-increases the
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strength and hardness and reduces hot-cracking in casting
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What does Mn do in aluminum? - CORRECT ANSWER✔✔-improves
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ductility and impact strength, castability and reduces shrinkage
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What does Si do in aluminum? - CORRECT ANSWER✔✔-increases
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fluidity and corrosion resistance, makes it difficult to machine
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