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welding level b rk7 metallurgy 2 > rk7-3 task 1 > Flashcards

rk7-3 task 1 Flashcards

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Welding Inspection Basics flashcards
1
Q

aluminum is a lightweight ______ metal.

  1. reactive
  2. non-ferrous
  3. pearlite
  4. cementite
A

b. non-ferrous

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2
Q

Aluminum is about _________ as heavy as steel.

  1. one-third
  2. one-half
  3. two-thirds
  4. three-quarters
A

a. one-third

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3
Q

the corrosion resistance of aluminum results from

  1. high tensile strength
  2. good weight-to-strength ratio
  3. formation of an oxide film
  4. high reflectivity
A

c. formation of an oxide film

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4
Q

what is the melting point of pure aluminum?

  1. 538°C (1000°F)
  2. 593°C (1100°F)
  3. 648°C (1200°F)
  4. 659°C (1220°F)
A

d. 659°C (1220°F)

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5
Q

from which ore is most of the worlds aluminum derived?

  1. bauxite
  2. iron
  3. magnesium
  4. aluminate
A

a. bauxite

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6
Q

Match the alloy group in Column II with the correct designation in Column I.

A

1XXX - unalloyed aluminum

2XXX - copper

3XXX - manganese

4XXX - silicon

5XXX - magnesium

6XXX - magnesium and silicon

7XXX - zinc

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7
Q

which of the following is a heat - treatable wrought aluminum alloy?

  1. 1XXX
  2. 2XXX
  3. 3XXX
  4. 4XXX
A

b. 2XXX - copper

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8
Q

which of the following is a non-heat-treatable wrought aluminum alloy?

  1. 2XXX - copper
  2. 3XXX - manganese
  3. 6XXX - magnesium and silicon
  4. 7XXX - zinc
A

b. 3XXX - manganese

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9
Q

which is the major alloying element in the casting alloy 520.0?

  1. silicon
  2. copper
  3. manganese
  4. magnesium
A

d. magnesium

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10
Q

which temper designation indicates the higher degree of work hardening?

  1. H-F
  2. H-18
  3. H-21
  4. H-34
A

b. H-18

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11
Q

which of the following has the highest pecentage of aluminum?

  1. 1050
  2. 1099
  3. 1100
  4. 1175
A

b. 1099

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12
Q

most aluminum alloys have greeatr corrosion sesistance than pure aluminum.

  1. true
  2. false
A

b. false

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13
Q

what is the purpose of anodizing and Alclad treatments

  1. to increase the hardness and strength of the wrought aluminum alloys
  2. to increase the hardness and strength of pure aluminum
  3. to provide a protective coating to wrought aluminum alloys
  4. to provide a protective coating to pure aluminum
A

c. to provide a protective coating to wrought aluminum alloys

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14
Q

which of the following alloy designations is not generally considered weldable?

  1. 1XXX - 99.00% min. aluminum and greater
  2. 2XXX - copper
  3. 5XXX - magnesium
  4. 6XXX - magnesium and silicon
A

b. 2XXX - copper

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welding level b rk7 metallurgy 2 (7 decks)

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