Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Sheet Metal First Year > Materials ( 110101j ) > Flashcards

Materials ( 110101j ) Flashcards

1
Q

Brittleness in a metal is what?

A

The ability to withstand distortion materials like glass, cast iron are considered brittle as they will shatter easily

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How is a metal conductive?

A

Most metals are good conductors when they permit the flow of heat or electricity through them easily

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is metal ductility?

A

A metal that has the ability to withstand stretching, bending or twisting past its elastic limit without breaking or losing any other mechanical properties

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is metal elasticity?

A

Elasticity is the tendency of a metal to return to its original shape after it has been deformed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is hardness in a metal?

A

Hardness is the ability of a metal to resist forces that tend to push the molecules apart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When a metal is malleable how is it described?

A

It can easily be drawn out by hammering or when forces are applied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is strength of a metal?

A

The amount of high, steady stress a metal can withstand before it yields

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are 3 categories of heat treating?

A

Annealing
Quenching
Tempering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is annealing?

A

A process used to release internal stresses in a hardened metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is quenching?

A

Quenching is a process that involves rapid cooling of a metal that is heated by immersion in a medium such as water or oil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is oxidation?

A

The result of a metal that is exposed to oxygen in the atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a ferrous metal?

A

Metal that contains iron contents like mild steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a non ferrous metal?

A

Metal that does not have iron in it
Like aluminum or copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are some pure metals?

A

Gold, silver, aluminum these metals are pure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is an alloy?

A

Alloy metals are combination metals that have 2 or more metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is expanded metal?

A

Metal that is formed from slitting and expanding diamond shapes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is perforated metal?

A

Solid sheets with holes punched in.
The holes can be round, square, or other patterns

18
Q

What is most common name for hardware cloth?

A

Birdscreen, it is a wire mesh to cover openings against the entry of unwanted pests

19
Q

What is galvanic action?

A

This is a corrosive process that results when dissimilar metals come into contact with an electrolytes such as moisture

20
Q

What is one way to prevent galvanic action?

A

To provide a barrier between the two metals

21
Q

What is the gauge of metal?

A

The thickness

22
Q

What metal must not be used on any food equipment?

A

Zinc coated metal because the zinc and its compounds are poisonous

23
Q

What is galvalume used for?

A

The outer wall of B-vent and L-vent chimney and fittings

24
Q

What is an advantage of stainless steel?

A

A high resistance to heat and corrosion

25
Q

What is a disadvantage of stainless steel?

A

Because of their high tensile strength they are more difficult to work with.

26
Q

What is one advantage of aluminum?

A

It is lightweight weighing about one third the weight of steel

27
Q

What are some common uses of aluminum?

A

Aluminum has many uses including automotive, aerospace and marine industries.
Aluminum foil in the packaging industry as well as soda cans and cooking utensils

28
Q

What is copper?

A

A reddish brown metal that is considered an element.
It hardens when it is cold worked and is extremely tough

29
Q

What are some advantages of copper?

A

It is an excellent conductor of heat and electricity. Because it’s oxides protect it from further oxidation it is a long lasting metal

30
Q

What are advantages of brass?

A

Brass is highly malleable and are easily cast, forged, rolled and pressed.

31
Q

What are two basic categories of plastics?

A

Thermosetting
Thermoplastic

32
Q

What are thermosetting plastics?

A

Thermosetting plastics harden under heat such as vulcanized rubber, silicone

33
Q

What are thermoplastic materials?

A

Materials that soften when heated and solidify when cooled

34
Q

Where is PVC pipe used?

A

To vent high efficiency furnaces.
For corrosive fume exhaust systems

35
Q

What is toughness in a metal?

A

The ability to withstand an impact load

36
Q

What is no 4 stainless steel?

A

A stain finish on one side used for restaurant, kitchen etc

37
Q

How is aluminum obtained?

A

From an ore called bauxite

38
Q

What is the formula for an inside diameter measurement?

A

Add 20 percent of the material thickness to the side of the bend line
( in add 20)

39
Q

What is the formula for an outside diameter measurement?

A

Subtract 80 percent of the metal thickness on all sides of the bend
( out sub 80)

40
Q

How is copper gauged?

A

By the weight in ounces per square foot

Sheet Metal First Year (31 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions