Maricopa Community Colleges  ABC138   20052-20086 
Official Course Description: MCCCD Approval: 07/22/08
ABC138 20052-20086 LEC 1 Credit(s) 1 Period(s)
Trade Math: Sheetmetal
Addition, subtraction, multiplication, and division to solve linear, area, volume and angle problems related to the sheetmetal trade. Use of protractors, vernier calipers and micrometers. Measuring angles, tolerances, seam allowances, blank sizes and stretch outs. Conversion to metric. Interpretation of mathematical symbols and sequence. Percentage, ratio and proportion equations.
Prerequisites: (Registered apprentice status and ABC/MEC120) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABC138   20052-20086 Trade Math: Sheetmetal
1. Convert non-metric "English" measurements to their metric equivalents. (I)
2. Use geometric formulas to determine area and volume of specific geometric shapes. (II)
3. Explain and use the "Pythagorean Theorem" to solve angle measurements. (III)
4. Identify mathematical symbols and use in proper sequence to solve specific mathematical problems related to the trade. (IV)
5. Define ratio, proportion and percentage and use to solve equations and word problems related to the trade. (V)
6. Explain the purpose and procedure for using a protractor, micrometer and vernier caliper. (VI)
7. Solve problems involving tolerances, allowances and blank sizes related to the trade. (VII)
8. Compute stretchouts for square, rectangular, circular and cone shaped sheetmetal fittings. (VIII)
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MCCCD Official Course Outline:
 
ABC138   20052-20086 Trade Math: Sheetmetal
    I. Metric Conversions
        A. Feet and yards to meters
        B. Pounds to kilos
        C. Tons to metric tons
      II. Volume and Area Calculations
          A. Definition of area
          B. Formulas
            1. Rectangle
            2. Square
            3. Triangle
            4. Circle
            5. Ellipse
          C. Problem solving
          D. Definition of volume
          E. Formulas
            1. Rectangle
            2. Square
            3. Triangle
            4. Circle
            5. Ellipse
          F. Problem solving
        III. Angle Measurements
            A. Right triangles
            B. Pythagorean theorem
            C. Problem solving
          IV. Mathematical Symbols
              A. Identification
                1. Grouping symbols
                2. Operational symbols
              B. Sequence of operations
                1. Multiplication
                2. Division
                3. Addition
                4. Subtraction
                5. Practical coefficients
              C. Problem solving
            V. Percentage, Ratio and Proportion
                A. Percentage
                B. Ratio
                  1. Defined
                  2. Compound
                C. Proportion
                  1. Defined
                  2. Direct
                  3. Indirect
                  4. Compound
                D. Problem solving
              VI. Measuring Instruments
                  A. Protractor
                  B. Micrometer
                  C. Vernier caliper
                VII. Tolerances
                    A. Definition
                      1. Unilateral
                      2. Bilateral
                    B. Allowance
                      1. Seam
                      2. Edge
                      3. Bend
                    C. Problem solving
                  VIII. Stretchout Computations
                      A. Stretchout allowances
                        1. Square duct
                        2. Rectangular duct
                        3. Square or rectangular boxes
                        4. Circular fitting
                        5. cone shaped fitting
                      B. Problem solving
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