Question

One of the purposes of annealing plastic parts is to: increase the strength significantly increase the ductility significantly to stabilize dimensions through the relief of residual stresses to increase grain size significantly to decrease the degree of crystallinity A suitable technique to produce a thin walled hollow ceramic part is blow molding injection molding rotational molding thermoforming compression molding slip casting tape casting Calendaring During annealing of a plastically deformed metal, electrical conductivity generally decreases. True False In the Al-Mg system, an intermediate solid solution is: alpha (alpha) delta (delta) L y (gamma) Thermoset parts are typically produced by: melting and forming a parison first and then stretching above T_g stretching above T_g, forming a parison and then melting mixing powders to form the monomer and then stretching above T_g initially forming the prepolymer paste, shaping it and then completing the polymerization hot working the polymer and then strain hardening the crosslinked molecules A suitable ther m ofor m j ng temperature for polystyrene is 80C. True False

Answer 1

A) The purpose of annealing plastic parts is to,

c) stabilize dimensions through the relief of residual stresses

B) A suitabkle technique to prodce a thin walled hollow ceramic part is,

a) blow molding

C) During annealing of a plastically deformed metal, electrical conductivity generally decreases.

False

D) In Al-Mg system, an intermmediate acid solution is,

d) gamma

E) thermoset parts are produced by,

d) initially forming the prepolymer paste, shaping it and then completing the polymerization.