FE Exam Actual Questions and Answers 2024/2025 Solved 100%

FE Exam Actual Questions and Answers 2024/2025 Solved 100% Young's Modulus - answerE modulus of elasticity How much does something compress - answerstrain = compression Δ = change in compression Δ =PL/AE γ c ф (Geotechnical) - answerUnit weight cohesion angel of internal friction bearing capacity - answeruse ultimate bearing capacity equation then divide by factor of safety cohesion value for sand - answerzero Pressure at bottom of a wall (fluids) - answer(fluids) unit weight x h (geotech) Ka(unit weight x h) Ka = active earth pressure ρ = Ka(γxh) P = 1/2(ρxh) for triangular pressure point load overturning moment = P(h/3) Determine factor of safety of a retaining wall resisting earth. Wall has a moment 6000 ft-lbs& earth is acting in the opposite direction to overturn the wall with 3146 ft-lbs - answermoment of wall/moment of earth = factor of safety If factor of safety isn't enough, need a bigger wall Active earth pressure vs Passive earth pressure - answerActive: trying to overturn the wall Passive: trying to resist active (don't have to worry about if wall is level with earth, not embedded) log b - log a also equals - answerlog(b/a) Secant Modulus - answerBetween origin and any "arbitrary" point on the curve Cord Modulus - answerBetween any two points Tangent Modulus - answerAt one "arbitrary" point on the curve Modulus of Elasticity of Steel - answer29,000 ksi Modulus of Elasticity of Aluminum - answer10,000-11,000 ksi Modulus of Elasticity of Concrete - answer2,000-6,000 ksi Modulus of Elasticity of Wood - answer900-2,200 ksi Poisson's Ratio - answerRelates lateral and axial strain εl/εa 0-.5 (0=incompressible, 0.5=no volume change) when stretched, a material's cross section is decreased. when compressed, a material's cross section is increased. Elastic Limit - answerThe transition going from elastic to plastic Will a Brittle material have a plastic region - answerNo Offset vs Extension Method for estimating yield stress - answerOffset: offset linear elastic part of the curve to create a parallel line. Intersection = yield stress estimate Extension: straight up from 0.5 strain Where is: True Stress & strain, Proportional Limit, Engineering stress & strain, Yield Point, Rupture, & Ultimate Strength - answerProportional Limit: just before becomes non linear. Yield Point, top of initial curve. Ultimate Strength: Top on main curve. True Stress & Strain: upward tangent to curve after yield point. Engineering Stress & Strain: downward part of curve after ultimate strength. Rupture: end of graphed line. Proportional Limit - answerTransition between linear and non linear Elastic Limit - answer-Transition between elastic and plastic behavior -Max stress with full recovery Yielding - answer-Strain continues with little or no increase in stress -Occurs after the elastic limit Ultimate Stress - answerMax stress on the stress strain curve Rupture Stress - answerPoint where specimen fractures or ruptures Brittle Material - answer-Little plastic