City Guilds Model Questions Vol1 2024 Engineering Question 44
Practice objective / multiple choice question 44 from the 2024 City Guilds Model Questions Vol1 Engineering examination.
A rectangular beam of length \(1.2\) m has a cross‑section \(30\) mm × \(20\) mm and is made of a composite material consisting of \(60\%\) carbon fibre (Young's modulus \(E_f = 230\) GPa) and \(40\%\) epoxy matrix (Young's modulus \(E_m = 3.5\) GPa), with fibres aligned along the beam length.\ \(i\) Determine the effective Young's modulus \(E_{\text{eff}}\) of the composite using the rule of mixtures.\ \(ii\) If the beam is subjected to an axial tensile load of \(12\) kN, calculate the resulting axial elongation \(\Delta L\) (in mm). Give \(E_{\text{eff}}\) to two decimal places and \(\Delta L\) to two decimal places.
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About This Question
This is City Guilds Model Questions Vol1 2024 Engineering Question 44. It is one of the objective questions from the 2024 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Medium .
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