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sheet metal 1 yr > material 110101j > Flashcards

material 110101j Flashcards

1
Q
  1. Two metals mixed are considered a alloy true or false
A

true

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2
Q

Gold , silver, and aluminum are forms of ?

A

Metallic elements because that are pure form

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3
Q

Expanded metal that is turned into a mess appearance looking liking diamonds is

A

Expanded metal

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4
Q

Metal that holes punched into metal is known as ?

A

Perforated metal

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5
Q

Hardware cloth is known as ?

A

Birdscreen

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6
Q

Glass ,cast iron and hard steel are considered ?

A

Brittle

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7
Q

Copper is a good metal to ?

A

Conduct heat known as conductivity

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8
Q

What able to bend over its ability and stretching and still hold its mechanical properties ?

A

Ductility

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9
Q

What the name for a metal to transform back to its original form after its been forced out of shape ?

A

Elasticity

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10
Q

Whats the metal thats able to resist force ?

A

Hardness

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11
Q

Whats its called when metal thats able to withstand rolling without cracking or breaking?

A

Malleability

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12
Q

Steady stress on metal can withstand before it yields is ?

A

Strength

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13
Q

Metal that will not break with force or to shear is ?

A

Toughness

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14
Q

Annealing and natural conditions to outside will do what to metal ?

A

effect the metal

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15
Q

Heat treatment has three categories ?

A

Annealing , quenching , tempering

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16
Q

Metal formed cold is known as ?

A

Cold work

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17
Q

When metal is exposed to oxygen its known to ?

A

Oxide

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18
Q

How can it be galvanic action be prevented between two metals ?

A

Put a barrier between them or coat it

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19
Q

Ferrous is gauged with ?

A

U.s standard

20
Q

Non ferrous is gauged with ?

A

American standard wire

21
Q

The most standard gauge of metal in our trade is ?

A

16 and 28

22
Q

If metal has iron in it ,its known as ?

A

Ferrous metal

23
Q

Iron is found in it own state true or false ?

A

True

24
Q

Steel is a alloy composed of iron and carbon true or false ?

A

True

25
Q

Carbon is a element that acts as a ?

A

Harding agent

26
Q

Black iron is a mild steel that can be obtained as a ?

A

Hot rolled or cold rolled

27
Q

Black iron that is greater then 1/8 is called ?

A

Steel plate

28
Q

When welding metal with zinc it important to ?

A

Have ventilation to prevent oxide fumes and illness

29
Q

Mild steel with a coating of zinc is called ?

A

Galvanized iron , satin coated , paint lock

30
Q

When gauging galvanized steel what needs to be considered ?

A

The zinc that has been added to the metal

31
Q

The zinc that has been added to the metal is

A

Corrosion resistance and heat resistant

32
Q

Down side to stainless steel is ?

A

Its harder to work with

33
Q

When working with stainless steel the work area needs to be ?

A

Free of iron

34
Q

Alumiumin is a ore called ?

A

Bauxite

35
Q

Automobiles and aerospace , drinking cans are common uses of ?

A

Aluminum

36
Q

When copper is hardened its known as ?

A

Cold worked

37
Q

Copper is gauged by ?

A

Weight per foot

38
Q

Common name used for copper zinc alloys ?

A

Brass

39
Q

Brasses are highly malleable and resistant to corrosion true or false ?

A

True

40
Q

Plastics are put into two categories ?

A

Thermosetting and thermoplastic

41
Q

Plastics are hardens under heat by chemical reaction are called ?

A

Thermosetting

42
Q

fittings can be moulded and formed and welded by applying pressure is called ?

A

Thermoplastic

43
Q

Silica and sand are heated to melt into a liquid stat to form ?

A

Fibrous glass duct

44
Q

Metallic flexible duct is used for ?

A

Chimney liner

45
Q

What’s the disadvantage of flexible duct ?

A

Causes friction

sheet metal 1 yr (3 decks)

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