FE Mechanical Exam Questions with Correct Answers Latest Update

FE Mechanical Exam Questions with Correct Answers Latest Update amorphous - Answers no clearly defined shape or form Fouling - Answers Accumulation of unwanted material on sold surfaces Vector curl - Answers Curl is a vector operator that describes a vector field's vorticity (rotation), at a point Vector magnitude - Answers Vector length (hypotenuse) Unit vector - Answers Vector with a magnitude of 1. Sometimes called a direction vector intensive property - Answers Aka a bulk property. It is a physical property of a system that does not depend on the systems size or amount of material in the system. extensive property - Answers a property that depends on the amount of matter in a sample. Ex: mass and volume Gibbs phase rule - Answers F=c-p+2 F=intensive degrees of freedom=variance P=# of phases C=components Factors=2+#of components-#phases Density of water - Answers 1 g/cm³ or 1000 kg/m3 1 psi to pascal - Answers 6894.76 pascals Hot working - Answers when the deformation is carried out above the recrystallization temperature. cold working - Answers The plastic deformation of a metal at a temperature below that at which it recrystallizes. Metal changes how when hot worked? - Answers Produces a fine grained product Removes strain hardening Combines of annealing and cold working Temper - Answers Description of the amount and type of processing done to a material at the mill, including cold work and thermal treatments Annealing - Answers Heating steel to a specific temperature and then cooling at a very slow and controlled rate -softens a metal for cold working -improves machinability -enhances electrical conductivity -restores ductility Annealing used for steel but other metals can be subject to solution annealed Tempering - Answers Heating metal to a precise temperature below the critical point. Often done in air, vacuum or inert atmospheres Used to alter: hardness, ductility, toughness, strength, structural stability Prefix M as in Mega - Answers *10^6 Prefix G as in Gega - Answers *10^9 Work hardening/strain hardening - Answers Use of permanent deformation to increase the strength of the metal. Aka cold work Creep - Answers Sometimes called cold flow. The tendency of a solid material to move slowly or deform permanently under the influence of mechanical stresses._