English System vs. International System                                                         Name ___________________

 

Use ruler “A” below to answer questions 1 - 2

 

1.  How can you tell that the ruler shown above is not based on the SI system?

Remember that SI always uses 10 divisions and that in SI all the tick marks are the same length (except for the middle one)

 

2.   Record the most precise value possible for the length of the black rectangle shown, using Ruler “A” as

     your  measuring device: : remember that with inches, if the length falls between two tick marks, you must double both the numerator and denominator of the fraction, then add one to the numerator

 

Use the following English System socket wrench sizes to answer questions 3 – 5:

1/ 2''       1/4 ''      5/32''      19/32''      5/16''       3/8''      7/32''

   

3.   Which of the above is the smallest size?  _____________

 

4.   Which of the following is one size up from  11/32 ? 3/8

 

5.  Which of the following is one size down from 11/32 ? _____________

 

6.  Add the following measurements:

     3 '    7 and 53/64  ''   +  5 '   8 and 21/32  ''  + 2 '  3 and 5/8 ''   = find the common denominator for the fractions, add them up, if you end up with more than 12 inches, convert them to feet

Hint: it’s more than 11 feet, and the inch fraction should have a denominator of 64ths

 

           

7.  Record the most precise value possible for the length of the black rectangle shown, using Ruler “B” as

    

     your measuring device: _________________

 

8.  Ruler “B” is a centimeter ruler; how can you tell that it isn’t accurate? ___________________________

 

Use the following SI System socket wrench sizes to answer questions 8 - 10:

 

14 mm     12 mm    18 mm     10 mm     15 mm     13 mm      9mm   17 mm

 

8.  Which of the above is the smallest size?  _____________

 

9.  Which of the following is one size up from  11mm? 12 mm

 

10.  Which of the following is one size down from  11mm? ______________

 

11.  Add the following measurements:

 

        273.315 cm       +  115.259 cm     +    184.864 cm = hint: use a calculator

 

12.  Give two reasons why the SI (metric) system is preferable to the English System:

 

Answers

Doesn’t match standard

Not divided into tenths

5/32

5/16

3/8

2.63

2   11/16

9

10

11  8  7/64

12

573.438