Hardness (Junior Cert Applied Technology): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is hardness?
What is hardness?
Resistance to indentation & scratching
Which tests are commonly used to measure hardness?
Which tests are commonly used to measure hardness?
Brinell, Vickers, and Rockwell
What do indentation tests use to check hardness?
What do indentation tests use to check hardness?
Force to make a dent on the surface
What is measured during indentation tests?
What is measured during indentation tests?
Depth and diameter of indentation
What does brittleness describe?
What does brittleness describe?
Likelihood to fracture under stress
Why is glass considered hard but brittle?
Why is glass considered hard but brittle?
Resists scratches but breaks on impact
What does toughness measure?
What does toughness measure?
Energy absorption & deformation ability
How do tough materials respond to impact?
How do tough materials respond to impact?
Withstand blows without breaking
Which tests measure toughness?
Which tests measure toughness?
Charpy and Izod tests
What do toughness tests measure?
What do toughness tests measure?
Energy absorption under sudden force