1. 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

2. 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

3. 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

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

5. 1 ¾ ½ ¼ ¼ ¼ ¼ Fraction of an Inch
© 2004 Refrigeration Training Services - R1 Subject 4 Basic Math & Measurement v1.2

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

7. 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

8. 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

9. 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

10. 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

11. Calculating Volume 1 1 1 25 cubic inches 1 x 5 x 5 = 2521 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

12. 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

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

14. 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

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

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