R1 Fundamentals of Refrigeration R1 Fundamentals of Refrigeration - Subject 4 Basic Math and Measurement v1.1 6/19/2018 R1 Fundamentals of Refrigeration #4 Basic Math & Measurement © 2004 Refrigeration Training Services No reproduction or unauthorized use allowed

Measurements Inches Feet Yard R1 Fundamentals of Refrigeration - Subject 4 Basic Math and Measurement v1.1 6/19/2018 Measurements Inches Feet Yard © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2 © 2004 Refrigeration Training Services No reproduction or unauthorized use allowed

Linear Measurement 1 1 inch 12 inches = 1 foot 12 = 1 36 inches = 1 yard 12 inches = 1 foot 3 feet = 1 yard © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Fraction of an Inch Four quarters to an inch © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

1 ¾ ½ ¼ ¼ ¼ ¼ Fraction of an Inch © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Other fractions of an inch Sixteenths Eighths © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Other fractions of an inch 2/16” = 1/8” 1/16” 3/16” ¼” ½” ¾” “ © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Area of a square or rectangle Multiply the length Times the width Result is in square inches © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Calculating Area 12 1 1 1 x 1 = 1 square inch 12 3 4 5 6 7 8 9 10 11 12 2 3 4 5 6 12 x 12 = 144 square inches 7 8 9 10 11 12 © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Volume of a cube Calculate the area Multiply by the depth Result is in cubic inches © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Calculating Volume 1 1 1 25 cubic inches 1 x 5 x 5 = 25 21 22 23 24 25 16 17 18 19 20 11 12 13 14 15 25 cubic inches 6 7 8 9 10 1 x 5 x 5 = 25 1 2 3 4 5 1 1 1 x 1 x 1 = 1 cubic inch + 25 cu. inches + 25 cu. inches + 25 cu.inches + 25 cu. inches = 50 5 x 5 x 5 = 125 = 75 = 100 = 125 © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Measuring Circles Circumference is the distance around the circle Diameter is the width of a circle across its center Radius is the distance from the center to a point on the circle Pi () is always the same value Area of a circle is in square inches (or feet) © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Area of a Circle Circumference Area = r2 Area Radius Diameter  =  = Circumference Diameter  = 3.14159 Circumference Radius Area =  x r2 Diameter Area (½ Diameter) Area = r2 © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Volume of a cylinder Calculate the area of the top Then multiply by the height Result is in cubic inches © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

Volume of a Cylinder Area Area = r2 Volume = Area x Height H © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

End of Basic Math and Measurement © 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2