Answer Key: Self-Test C-3.2

  1. List the correct measurements for the lettered dimensions in Figure 1.
    1. 6′-5″
    2. 12′-10″
    3. 1′-6″
    4. 4′-9″
    5. 0′-6″
    6. 0′-11″
    7. 2′-0″
    8. 0′-3″
    9. 1′-9″
    10. 2′-11″
  2. Find the lengths of the sections of pipe (Figure 2), centre to centre, using an architect’s rule. Scale [latex]\frac{3}{4}\text{"} = 1\text{'}-0\text{"}[/latex].
    1. 1′-[latex]\frac{1}{2}\text{"}[/latex]
    2. 2′-[latex]4\frac{1}{2}\text{"}[/latex]
    3. 1′-10″
    4. 0′-10″
    5. 1′-1″
  3. Write the correct measurement of the dimensions shown below in the box at the right:
    1. 9.65 m
    2. 6.05 m
    3. 0.58 m
    4. 1.13 m
    5. 2.36 m
    6. 2.8 m
    7. 3.4 m
    8. 8.6 m
    9. 1.02 m
    10. 1.66 m
    11. 1.8 m
  4. Using Figure 3 give the C—C (centre to centre) lengths of each section of pipe in mm, using a metric scale.
    1. 560 mm
    2. 400 mm
    3. 1,140 mm
    4. 540 mm
  5. What would the lengths be in Figure 3 if the scale was 1:50?
    1. 1,400 mm
    2. 1,000 mm
    3. 2,850 mm
    4. 1,350 mm
  6. Find the millimetre lengths of the sections of pipe, centre-to-centre, in each of the four scales in Figure 4, using a metric rule.

Scale

1:5

1:50

1:20

1:100

a.

100 mm

1 m

0.4 m

2 m

b.

225 mm

2.25 m

0.89 m

4.5 m

c.

175 mm

1.75 m

0.7 m

3.5 m

d.

80 mm

0.8 m

0.32 m

1.6 m

e.

105 mm

1.05 m

0.42 m

 2.1 m
  1. State the two reasons why it is poor practice to obtain dimensions by measuring drawings.
    1. Shrinkage may occur in the reproduction process.
    2. Drawing is not necessarily to scale.
  2. State reasons why it is not usually necessary to measure drawings for dimensions.
    1. All necessary dimensions are generally included on the blueprints (drawings).
  3. State the procedure required to obtain dimensions that appear to be missing.
    1. Examine several or all prints in the set. Measure only after you are sure that dimensions cannot be found from information given on any of the prints.
  4. State why arithmetic is necessary occasionally for finding dimensions.
    1. To obtain dimensional (size) information.
  5. Using a metric tape, calculate the lettered dimensions in Figure 5. The scale is 1:20.
    1. 0.7 m
    2. 0.94 m
    3. 0.5 m
    4. 0.7 m
    5. 1.06 m
    6. 0.36 m
    7. 0.38 m
  6. If the scale in Figure 5 were 1:50, what would the dimensions be?
    1. 1.75 m
    2. 2.35 m
    3. 1.25 m
    4. 1.65 m
    5. 2.45 m
    6. 0.9 m
    7. 0.95 m
  7. Using an imperial tape measure, calculate the lettered dimensions in Figure 6 at a scale of [latex]\frac{1}{8}[/latex] inch = 1 foot.
    1. 10′
    2. 6′
    3. 4′
    4. 8′
    5. 12′
    6. 12′
    7. 12′
    8. 4′
    9. 3′
  8. Find the exact length of the lettered dimensions in Figure 7, according to the scale.
    1. 2′-[latex]7\frac{1}{2}\text{"}[/latex]
    2. 1′-0″
    3. 0′-[latex]10\frac{1}{2}\text{"}[/latex]
    4. 4′
    5. 10′-[latex]\frac{3}{4}\text{"}[/latex]

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