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02
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Exam-style questions with the mark allocation showing, so you know how much to write. You answer them — nothing is handed to you.
A steel rod 12 mm in diameter carries a tensile load of 25 kN. Calculate the stress and determine whether the rod is safe if the yield strength is 250 MPa and a factor of safety of 2 is required. (6 marks)
03
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Your answer comes back marked criterion by criterion in seconds — what you earned, what you half-earned, and what the examiner never saw.
4/6 · ✓ Calculates the cross-sectional area correctly from the diameter
04
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The topics you keep losing marks on come back around in your review until they're strong. That's the whole point.
free-body diagrams and equilibrium
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free-body diagrams and equilibriummoments and reactions in beamstruss analysisstress, strain and Young’s modulus
A steel rod 12 mm in diameter carries a tensile load of 25 kN. Calculate the stress and determine whether the rod is safe if the yield strength is 250 MPa and a factor of safety of 2 is required. (6 marks)
Engineering Studies · HSC
Marked in seconds
✓ Calculates the cross-sectional area correctly from the diameter
✓ Calculates stress with correct units in MPa
✓ Compares against the yield strength
✕ Applies the factor of safety — allowable stress is 125 MPa, so the rod is NOT safe
Weak topics, resurfacing
free-body diagrams and equilibrium
moments and reactions in beams