As the porosity of a refractory ceramic brick increases:

(A) strength decreases, chemical resistance decreases, and thermal insulation increases

(B) strength increases, chemical resistance increases, and thermal insulation decreases

(C) strength decreases, chemical resistance increases, and thermal insulation decreases

(D) strength increases, chemical resistance increases, and thermal insulation increases

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

List five instruments for angular measurement and explain one of them witlh appropriate diagram(s)

Adrawing operation is to be performed on a perfectly plastic material with strength coefficient- 100 mpa and strain hardening exponent-0. neglect redundant strain. die/work material friction coefficient=0 a)-what is the drawing stress? if this stress is a function of the area reduction, state so. b)-what is the strength of the material after drawing? if this strength is a function of the area 4. reduction, state so. c)-what is the maximum area reduction possible?