system of measurement.pptx studying about measurements.com
- 1. Why is it important to study measurement?
- 2. • Measuring properly and accurately is very important skill that an electrician should develop to achieve good and safety performance and to avoid waste of materials, time and effort . • It is important that an electrician knows how to measure using the different electrical measuring tools and instrument. • You need to know how to read and interpret the system of measurement and how to convert these measurements from one unit to another unit of measurement.
- 3. • One of the most important measuring tools needed in electrical installation is a VOLT-OHM MILLIAMMETER (VOM) otherwise called as MULTI-TESTER. • This is used to measure the voltage,resistance and current of a circuit. • As a beginner, you need to know the parts and functions and how to use this instrument. Proper care is needed when handling this instrument to avoid damage.
- 4. SYSTEM OF MEASUREMENT •A system of measurement is a set of units which can be used to specify anything that can be measured.
- 5. 1. English system- provides the creative way on how people can measure by themselves. For example, people measure shorter distance on the ground with their feet. They measure long distances by their palms which is equal to a yard. • Inch • Yard • Miles
- 6. 2. Metric system-is a decimalized system of measurement. It exist in several variations with different choices of base units. Metric units are widely used around the world for personal, commercial and scientific purposes. • Millimeter • Centimeter • Decimeter • Meter
- 7. COMMON ENGLISH UNITS AND EACH EQUIVALENT •1 FOOT (FT) = 12 INCHES (IN) •1 YARD (YD) =3 FEET •1 YARD =36 INCHES
- 8. COMMON METRICS UNITS AND EACH EQUIVALENT • 10 MILLIMETER (mm) = 1 CENTIMETER (CM) • 10 CENTIMETER = 1 DECIMETER (DM) • 10 DECIMETER =1 METER (M) • 100 CENTIMETER = 1 METER
- 9. SOME OF THE ENGLISH TO METRIC EQUIVALENTS • 1 INCH = 2.54 CENTIMETER • 1 FOOT = 30.48 CENTIMETER • 1 YARD = 91.44 CENTIMETER
- 10. CONVERTING THE UNITS OF MEASUREMENT FROM ENGLISH TO ENGLISH MEASUREMENT EXAMPLES: 1) 10 feet = ___ inches (how many inches are there in 10 feet?) Steps in solving the above problem: Step 1:Remember that 1 foot is equal to 12 inches, thus: 10 ft x 12 in 1 ft Step 2: Multiply 10 feet to 12 inches, thus: 10 ft x 12 in 1 ft
- 11. Step 3: Cancel the common units of measurement, then perform the indicated operation, thus: 10 ft x 12 in = 120 in 1 ft Therefore 10 feet = 120 inches
- 12. 2) 6 feet = ___ yard Steps in solving the above problem: Step 1: Remember that 1 yd is equal to 3 feet, thus: 6ft x 1 yd 3 ft Step 2: Multiply the numerator (6 ft) to (1 yd),and divide by the denominator (3 ft) thus: 6 ft x 1 yd 3 ft
- 13. Step 3: Cancel the common units of measurement, then perform the indicated operations, thus: 6 ft x 1 yd = 2 yd 3 ft Therefor 6 feet = 2 yards
- 14. CONVERTING THE UNIT OF MEASUREMENT FROM METRIC TO METRIC MEASUREMENTS EXAMPLES: 1) 100 millimeters = __ centimeter (how many centimeter are there in 100 millimeter?) Steps in solving the above problem: Step 1: Remember that 10 millimeter is equal to 1 centimeter, thus: 100 mm x 1 cm 10 mm Step 2: Multiply the numerator (100 mm) to (1 cm), and divide by the denominator (10 mm) thus: 100 mm x 1 cm 10 mm
- 15. Step 3: Cancel the common units of measurement, then perform the indicated operation, thus : 100 mm x 1 cm = 10 cm 10 mm Therefore 100 millimeters = 10 centimeters
- 16. 2) 2 meters = __ millimeter (how may millimeter/s are there in 2 meters?) Steps in solving the problem above: Step 1: Remember that 100 centimeter is equal to 1 meter, thus: 2 m x 100 cm 1 m Step 2: Multiply the numerator (2m) to (100 cm), thus: 2 m x 100 cm 1m
- 17. Step 3: Cancel the common units of measurement , then perform the incated operation, thus: 2 m x 100 cm = 200 cm 1 m Step 4: Remember that 10 millimeter is equal to 1 centimeter, thus: 200 cm x 10 mm 1 cm Step 5: Multiply the numerator (200 cm) to (10 mm), thus: 200 cm x 10 mm 1 cm
- 18. Step 6: Cancel the common units of measurement , then perform the indicated operations, thus: 200 cm x 10 mm = 2000 mm 1 cm Therefore 2 meters = 2000 millimeters
- 19. CONVERTING THE UNIT OF MEASUREMENT FROM ENGLISH TO METRIC AND VICE VERSA EXAMPLE: 1) 10 inches = __ centimeter (how many centimeter/s are there in 10 inches?) Steps in solving the above problem: Step 1:Remember that 1 inch is equal to 2.54 centimeters, thus: 10 in 2.54 cm 1 in Step 2: Multiply the numerator (10 in) to (2.54 cm), thus: 10 in x 2.54 cm 1 in
- 20. Step 3: Cancel the common units of measurement, then perform the indicated operation, thus: 10 in x 2.54 cm = 25.4 cm 1 in Therefore 10 inches = 25.4 centimeters
- 21. 2) 50 centimeters = __ feet ( how many feet are there in 50 centimeters?) Steps in solving the above problem: Step 1:Remember that 1 foot is equal to 30.48 centimeters, thus: 50 cm x 1 ft 30.48 cm Step 2: Multiply the numerator (50 cm) to (1ft), and divide by the denominator 30.48 cm), thus: 50 cm x 1 ft 30. 48 cm
- 22. Step 3: Cancel the common units of measurement, then perform the indicated operation, thus: 50 cm x 1 ft = 1.640 ft 30. 48 cm Therefore 50 centimeters = 1.640 feet
- 23. READING A RULER •A ruler has two sides. • One side contains a English System and the other side is the Metric System.
- 24. THE INCH GRADUATION: note: 1 inch is equal to 16 lines/ graduations. The inch graduation into 16 graduations / lines. The first graduation is 1/16, the second graduation is 1/8 or 2/16, the third graduation is 3/16, the fourth graduation is ¼ or 4/16 and so on.
- 25. THE CENTIMETER GRADUATION: note: 1 graduation is equal to 1 millimeter. A Centimeter is divided into 10 graduations/lines. The first graduation is 1 millimeter (mm), the second graduation is 2 millimeters, the third graduation is 3 millimeter and so in.