FE Exam

conservative vector field Correct Answer-∇ X F= 0 linear differential equation Correct Answer-The dependent variable and its derivatives appear in additive combinations of their first powers homogeneous equation Correct Answer-When the right side of the dif eq is 0 constant coefficient equation Correct Answer-Given a⋅ y``(x) + b⋅ y`(x) + c = 0, the characteristic equation is: a⋅ r² + b⋅ r + c = 0 good electrical conductivity Correct Answer-the conduction band is half full isolated system Correct Answer-does NOT allow the transfer of either mass or energy system interacting Correct Answer-force is introduced form one to another sublimation Correct Answer-solid to gas deposition Correct Answer-the change of state from a gas directly to a solid Oxidation Correct Answer-The loss of electrons from a substance involved in a redox reaction. (An anode reaction) key to reinforce a material Correct Answer-similar thermal expansion creep failure Correct Answer-steady load at elevated temperatures metal fatigue Correct Answer-a weakening of metal due to stress, resulting in an accumulation of small cracks even below the yield stress upper and lower yield points Correct Answer-the barrier material to dislocation motion posed by impurity or solute atom. In mild steel, carbon produce such a barrier. off-set yield stress Correct Answer-the stress corresponding to a specified plastic strain, usually 0.2% ductile fracture Correct Answer-a cup and cone fracture surface crystalline solid