unit 6: review a
1. what thickness limit classifies metal as being sheet?
2. what is the standard thickness of 14 gauge steel sheet?
3. what is the standard gauge used to specify nonferrous sheet metal thickness?
4. what specifications are necessary for ordering a standard size of sheet iron?
5. what other item of stock can be measured with a sheet metal gauge tool?
6. in what units is plate thickness specified?
7. which is more accurate in size, hot - rolled or cold - rolled stock?
8. how can hot - rolled stock be distinguished from cold - rolled stock?
9. what is a piece of ½\×1\×6\ long stock commonly called?
10. how is the size of round steel or cast iron determined?
11. how is the size of hexagon steel determined?
12. what is the size specification of this angle iron? (with an image of angle iron with dimensions ¼\, 3\, 3¾\, ¼\)
13. what is the size specification of the angle iron below? (with an image of angle iron with dimensions 1½\, 3/16\, 13/16\)
14. which dimension(s) determine(s) the size of this s - beam? (with an image of s - beam with labels a, b, c, d)
15. why is a weight specification applied to an s - beam?
16. a. what terms are applied to the parts of the wide - flange beam represented by letters e and f?
b. identify the sizes represented by the letters a, b, c, and d for a w10×33 beam: (with an image of wide - flange beam with labels a, b, c, d, e, f)
17. sketch the symbols for:
a. square tubing
b. rectangular tubing

Question

Accepted Answer

The problem set provided is related to metalworking, specifically about the specifications, measurements, and identification of different types of metal stock (like sheet metal, angle iron, S - beams, etc.). This falls under the Engineering subfield of Natural Science. Since the questions are more about recalling engineering - related knowledge (such as standard thicknesses, gauge systems, and part identification in structural steel) rather than calculations, we'll use the Answer - Explanation Format.

### Question 1
# Brief Explanations:
In metalworking, a metal is classified as sheet when its thickness is 0.25 inches (or 6.35 millimeters) or less. This is a standard industry - recognized limit for distinguishing sheet metal from plate metal (which is thicker).
# Answer:
A thickness limit of 0.25 inches (or 6.35 mm) classifies metal as being sheet.

### Question 2
# Brief Explanations:
The standard thickness for 14 - gauge steel sheet is a well - known value in the metalworking industry. Through standard gauge - to - thickness conversion tables (which are based on industry standards), 14 - gauge steel sheet has a thickness of $\frac{5}{64}$ inches (or approximately 0.078125 inches, or 1.984375 millimeters).
# Answer:
The standard thickness of 14 - gauge steel sheet is $\frac{5}{64}$ inches (≈ 0.078125 in or 1.984375 mm).

### Question 3
# Brief Explanations:
For nonferrous sheet metal thickness, the standard gauge used is the Brown and Sharpe (B&S) gauge. This gauge system is specifically designed and widely accepted for measuring the thickness of nonferrous metals (like copper, aluminum, etc.) in sheet form.
# Answer:
The standard gauge used to specify nonferrous sheet metal thickness is the Brown and Sharpe (B&S) gauge.

### Question 4
# Brief Explanations:
When ordering a standard size of sheet iron, two main specifications are necessary: the thickness (usually specified by gauge number or a decimal/fractional inch measurement) and the dimensions (length and width) of the sheet. These two pieces of information are essential for the supplier to provide the correct amount and size of sheet iron.
# Answer:
The necessary specifications for ordering a standard size of sheet iron are the thickness (gauge or dimensional thickness) and the length and width dimensions.

### Question 5
# Brief Explanations:
A sheet metal gauge tool can also be used to measure the thickness of wire. Just like with sheet metal, the gauge tool can be applied to wire (especially in the context of metalworking and electrical wiring applications where wire thickness is important) to determine its thickness according to the relevant gauge system.
# Answer:
Wire can be measured with a sheet metal gauge tool.

### Question 6
# Brief Explanations:
Plate thickness is typically specified in inches (or millimeters in metric - using regions). In the imperial system (commonly used in metalworking in the US), fractional or decimal inches are used, and in the metric system, millimeters are the standard unit for specifying plate thickness.
# Answer:
Plate thickness is specified in inches (or millimeters).

### Question 7
# Brief Explanations:
Cold - rolled stock is more accurate in size. The cold - rolling process involves rolling the metal at room temperature, which allows for more precise control over the dimensions of the stock. Hot - rolled stock, which is rolled at high temperatures, tends to have more variation in size due to the effects of heat on the metal's properties and the rolling process.
# Answer:
Cold - rolled stock is more accurate in size.

### Question 8
# Brief Explanations:
Hot - rolled stock can be distinguished from cold - rolled stock by its surface finish and dimensional accuracy. Hot - rolled stock usually has a rougher surface finish and less precise dimensions (due to the high - temperature rolling process). Cold - rolled stock has a smoother, more refined surface and more accurate dimensions because it is rolled at room temperature, allowing for better control during the process. Also, hot - rolled stock may have a bluish - gray scale - like appearance from the oxidation that occurs during the hot - rolling process, while cold - rolled stock has a shinier, smoother appearance.
# Answer:
Hot - rolled stock has a rougher surface, less accurate dimensions, and may have a scale - like appearance. Cold - rolled stock has a smoother surface, more accurate dimensions, and a shinier appearance.

### Question 9
# Brief Explanations:
A piece of $\frac{1}{2}''	imes1''	imes6''$ long stock is commonly called a flat bar (or flat stock). The dimensions indicate a rectangular cross - section with a thickness of $\frac{1}{2}$ inch, a width of 1 inch, and a length of 6 inches, which is the typical description of a flat bar in metalworking.
# Answer:
This stock is commonly called a flat bar (flat stock).

### Question 10
# Brief Explanations:
The size of round steel or cast iron is determined by its diameter. In metalworking, for round stock (whether steel or cast iron), the diameter (measured across the circular cross - section) is the key dimension that defines its size. This is usually specified in inches (or millimeters) and is a standard way to identify the size of round metal stock.
# Answer:
The size of round steel or cast iron is determined by its diameter.

### Question 11
# Brief Explanations:
The size of hexagon steel is determined by the distance across the flats (the distance between two opposite flat sides of the hexagonal cross - section). This is the standard way to specify the size of hexagonal steel stock, as it provides a clear and consistent measurement of the overall size of the hexagonal shape.
# Answer:
The size of hexagon steel is determined by the distance across the flats.

### Question 12
# Brief Explanations:
To determine the size specification of the angle iron, we look at the dimensions of the legs and the thickness. The given angle iron has a leg length of $3\frac{3}{4}''$ (or $\frac{15}{4}''$), a leg width of 3 inches, and a thickness of $\frac{1}{4}''$. The size specification of an angle iron is typically given as the length of the two legs and the thickness, so it would be $3\frac{3}{4}''	imes3''	imes\frac{1}{4}''$.
# Answer:
The size specification of the angle iron is $3\frac{3}{4}''	imes3''	imes\frac{1}{4}''$.

### Question 13
# Brief Explanations:
For the angle iron shown, we need to identify the dimensions of the legs and the thickness. The vertical leg length is $1\frac{1}{2}''$, the horizontal leg lengths are $\frac{3}{16}''$ and $\frac{13}{16}''$ (but when specifying the size of angle iron, we consider the length of the two legs and the thickness). Wait, actually, the standard way to specify angle iron size is by the length of each leg and the thickness. Here, the two leg lengths (the two sides of the L - shape) are $1\frac{1}{2}''$ (the vertical leg) and the sum of $\frac{3}{16}''+\frac{13}{16}'' = 1''$? No, wait, looking at the diagram, the angle iron has a vertical leg height of $1\frac{1}{2}''$, a horizontal leg with a width of $\frac{3}{16}''$ (the thickness) and a length of $\frac{13}{16}''$? No, I think I misread. Actually, the size of angle iron is specified as the length of the two legs (the two outer dimensions of the L) and the thickness. So from the diagram, the two leg lengths are $1\frac{1}{2}''$ (the vertical leg) and $(\frac{3}{16}''+\frac{13}{16}'') = 1''$ (the horizontal leg), and the thickness is $\frac{3}{16}''$ (or $\frac{13}{16}''$? Wait, no, the angle iron's dimensions are: the two legs (the two sides of the L) have lengths of $1\frac{1}{2}''$ (vertical) and $1''$ (horizontal, since $\frac{3}{16}+\frac{13}{16}=1$), and the thickness of the legs is $\frac{3}{16}''$ (the width of the vertical leg's thickness) or $\frac{13}{16}''$? No, I think the correct way is that the angle iron size is given as the length of the two legs (the outer dimensions) and the thickness. So the vertical leg length is $1\frac{1}{2}''$, the horizontal leg length is $1''$ (since $\frac{3}{16}+\frac{13}{16}=1$), and the thickness is $\frac{3}{16}''$ (the thickness of the vertical leg) or $\frac{13}{16}''$ (the thickness of the horizontal leg)? Wait, no, angle iron thickness is the same for both legs. So actually, the two leg lengths (the two sides of the L) are $1\frac{1}{2}''$ and $1''$, and the thickness is $\frac{3}{16}''$ (the distance from the inner corner to the outer edge of one leg). So the size specification is $1\frac{1}{2}''	imes1''	imes\frac{3}{16}''$ (or $1\frac{1}{2}''	imes1''	imes\frac{13}{16}''$? No, I think the thickness is the smaller of the two horizontal dimensions. Wait, the diagram shows $\frac{3}{16}''$ as the thickness (the width of the vertical leg) and $\frac{13}{16}''$ as the length of the horizontal leg. So the angle iron size is $1\frac{1}{2}''$ (vertical leg length) $	imes1''$ (horizontal leg length, since $\frac{3}{16}+\frac{13}{16}=1$) $	imes\frac{3}{16}''$ (thickness).
# Answer:
The size specification of the angle iron is $1\frac{1}{2}''	imes1''	imes\frac{3}{16}''$.

### Question 14
# Brief Explanations:
For an S - beam (also known as an I - beam in some contexts, but S - beam has a specific shape), the dimensions that determine its size are the depth (the vertical height, labeled as B in the diagram), the flange width (the horizontal width of the top and bottom flanges, labeled as D), the flange thickness (the thickness of the top and bottom flanges, labeled as C), and the web thickness (the thickness of the vertical web, labeled as A). These four dimensions (A, B, C, D) together define the cross - sectional size of the S - beam, which is crucial for its structural properties and identification.
# Answer:
The dimensions that determine the size of the S - beam are the web thickness (A), depth (B), flange thickness (C), and flange width (D).

### Question 15
# Brief Explanations:
A weight specification is applied to an S - beam because the weight (usually given per unit length, like pounds per foot) is an important factor in determining the beam's structural capacity and its suitability for a particular application. The weight is related to the amount of material (steel) in the beam, which in turn affects its strength, load - bearing capacity, and the cost of the beam. Also, in structural engineering, when designing a building or structure, the weight of the beam (along with its dimensions) is used to calculate the overall load on the structure's supports and foundations.
# Answer:
A weight specification is applied to an S - beam to indicate the amount of material (and thus its strength, load - bearing capacity, and cost) and for structural design calculations (to determine loads on supports and foundations).

### Question 16a
# Brief Explanations:
In a wide - flange beam (the diagram with letters E, F, A, B, C, D), the part represented by letter E is the web thickness (the thickness of the vertical web of the beam), and the part represented by letter F is the flange (the bottom flange, or the top flange - in the diagram, F is at the bottom, so it's the flange, which is the horizontal part at the bottom of the I - shape). Wait, more accurately, in a wide - flange beam, the parts: E is likely the web thickness (the thickness of the vertical web), and F is the flange (the bottom flange, which is the horizontal plate - like part at the bottom of the beam's cross - section). The web is the vertical part, and the flanges are the horizontal top and bottom parts. So E is the web thickness, and F is the flange (or flange face).
# Answer:
E is the web thickness, and F is the flange (or flange face).

### Question 16b
# Brief Explanations:
For a W10×33 beam:
- A: The web thickness. For a W10×33 beam, the web thickness (A) is approximately 0.315 inches.
- B: The flange width. For a W10×33 beam, the flange width (B) is 10 inches (the "W10" in W10×33 indicates a nominal depth of 10 inches, but the flange width is also related. Wait, no, the W - shape beam designation: W10×33 means the nominal depth (the depth of the beam, B in the diagram) is 10 inches, the weight per foot is 33 pounds. The actual dimensions:
  - A (web thickness): ≈ 0.315 in
  - B (depth): ≈ 10.03 in
  - C (flange thickness): ≈ 0.545 in
  - D (flange width): ≈ 4.99 in

Wait, I need to recall the standard W - beam dimensions. The W10×33 beam has the following dimensions:
- Depth (B): 10.03 inches
- Flange width (D): 4.99 inches
- Web thickness (A): 0.315 inches
- Flange thickness (C): 0.545 inches

So:
A (web thickness) = 0.315 in
B (depth) = 10.03 in
C (flange thickness) = 0.545 in
D (flange width) = 4.99 in

# Answer:
A = 0.315 in (web thickness)
B = 10.03 in (depth)
C = 0.545 in (flange thickness)
D = 4.99 in (flange width)

### Question 17a
# Brief Explanations:
The symbol for square tubing is a square - shaped cross - section with two pairs of parallel sides, all of equal length. It is typically represented as a square with a line inside to indicate the thickness (or as a simple square outline with dimensions indicating the outer size and the wall thickness). In sketch form, it would be a square (with sides of length, say, s) with a smaller square inside (representing the hollow part) or just a square outline with labels for outer side length and wall thickness.
# Answer:
The symbol for square tubing is a square - shaped cross - section (e.g., a square with a line indicating thickness or a square outline with outer side length and wall thickness dimensions).

### Question 17b
# Brief Explanations:
The symbol for rectangular tubing is a rectangle - shaped cross - section with two pairs of parallel sides (length and width, with length ≠ width). It is typically represented as a rectangle with a line inside to indicate the thickness (or as a simple rectangle outline with dimensions indicating the outer length, outer width, and wall thickness). In sketch form, it would be a rectangle (with length l and width w, l≠w) with a smal…

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