Material Testing Methods Quiz

What are the two main categories of material testing methods?

• Destructive and Non-destructive

• Physical and Chemical

• Static and Dynamic

• Mechanical and Thermal

What is the primary purpose of destructive tests?

• To find material property values

• To find faults in materials

• To measure temperature changes

• To assess color variations

What is the primary purpose of non-destructive tests?

• To find faults in materials

• To determine melting points

• To measure electrical conductivity

• To assess chemical composition

What occurs at the 'Fracture' point on a stress-strain graph?

• The material breaks

• The material melts

• The material changes color

• The material becomes magnetic

What does 'Strain Hardening' refer to in the context of a stress-strain graph?

• Increase in strength due to plastic deformation

• Decrease in temperature due to cooling

• Increase in pressure due to compression

• Decrease in velocity due to friction

What is 'Necking' in a stress-strain graph?

• Localized reduction in cross-sectional area

• Increase in temperature

• Increase in pressure

• Decrease in velocity

Which hardness test provides an instant readout?

• Brinell

• Vickers

• Rockwell

• Mohs

What is the typical indentation depth range for accurate Brinell test results?

• 1-2 mm

• 2-5 mm

• 5-10 mm

• 10-15 mm

Which of the following is NOT a characteristic of fatigue?

• Occurs under cyclic loading

• Breaks materials above tensile strength

• Can occur without a fatigue limit

• Represented by S-N diagrams

What is the effect of cyclic loading on metal grain structure?

• It strengthens the structure

• It causes failure

• It has no effect

• It makes the structure more flexible