Review of Strand 6.1 Measurements and Interpretation

When measuring angles accurately, which tool would be most appropriate to use?

• Ruler

• Protractor

• Dial Caliper

• Micrometer

Explain how gradation on a measuring tool can affect the precision of a measurement.

• Gradation increases the size of the measurement.

• Gradation decreases the accuracy of the measurement.

• Gradation allows for more precise measurements by providing smaller increments.

• Gradation has no effect on measurement precision.

Which dimensioning symbol is used to indicate the diameter of a circle in technical drawings?

• Ø

• Δ

• ⊥

• ⊕

When measuring the hardness of a material, which tool would be most appropriate to use?

• Protractor

• Hardness Tester

• Dial Caliper

• Ruler

Convert a measurement of 5 inches to centimeters. (Use the conversion 1 inch = 2.54 cm)

• 10.16 cm

• 12.7 cm

• 15.24 cm

• 20.32 cm

A machine component is measured to be 3.5 cm in length. If the measurement needs to be converted to millimeters, what is the length in millimeters?

• 35 mm

• 350 mm

• 3.5 mm

• 0.35 mm

Describe the process of using a dial caliper to measure the thickness of a sheet of metal.

• Place the sheet between the jaws and read the main scale only.

• Place the sheet between the jaws, read the main scale, and add the dial reading.

• Use the dial only to measure the thickness.

• Use a ruler instead of a dial caliper for better accuracy.

What is the primary reason for using dimensioning symbols in technical drawings?

• To make the drawing look more complex

• To provide a universal language for measurements

• To reduce the number of measurements needed

• To increase the size of the drawing

If a machine part is dimensioned with a tolerance of ±0.05 mm, what is the range of acceptable measurements for a nominal size of 10 mm?

• 9.95 mm to 10.05 mm

• 9.5 mm to 10.5 mm

• 10 mm to 10.1 mm

• 9.9 mm to 10.1 mm

How would you strategically plan to measure the diameter of a small cylindrical object using a dial caliper?

• Use the inside jaws of the caliper to measure directly across the diameter.

• Use a ruler to estimate the diameter.

• Measure the height and assume it is equal to the diameter.