Question

all 1. Choose the correct 25 mar 1) A network polymer structure is a) more glossy (brittle) c) metal e) All the above b) die None of the whove 2) Galvanic corrosion between beryllium and lead will cause a) Lead to deposit on beryllium b) Nothing c) Beryllium to deposit on lead d) Zinc will deposits e) All the above 1) None of the above 3) A binary Isomorphous alloy has a) Two different phase regions c) One component c) All the above b) Three components d) Three different phase regions 1) None of the above 4) A brittle failure has a) High strain energies involved c) No strain energies involved e) All the above b) Low strain energies involved d) Some brittleness 1) None of the above 5) Corrosion is a surface phenomenon, and thus we need to limit a) Adsorption of charged species b) access to an electrolyte c) Number of ions in the solution d) Number of ions in the wires e) All the above 1) None of the above

Answer 1

que 1

ans- f) none of above

bcos Networked polymers are complex polymers that are heavily linked to form a complex network of three-dimensional linkages. These polymers are nearly impossible to soften when heating without degrading the underlying polymer structure and are thus thermosetting polymers

que 2 galvanic corrosion between beryllium and lead will cause

ans f) non of above

,bcos  beryllium and lead are good corossion resistance material

que 3 a binary isomorphous alloy has

ans d) three different phase regions

In a binary isomorphous system, the two metals are completely miscible in each other in liquid as well as solid form. The number of components are 2, the number of phases regions are 3 and degrees of freedom are 0

que 4 a brittel failure has

ans a) high strain energy involves

Brittle cleavage fracture occurs in materials with a high strain-hardening energy rate and relatively low cleavage strength or great sensitivity to multi-axial stress.

que 5 corrosion is a surface phenomenon and thus we need to limit

ans b) access to an electrolyte

An electrolyte is any substance that undergoes ionization when dissolved in water or ionizing solvents. This covers almost all soluble acids, bases and salts. ... Electrolytes play a vital role in the corrosion process since their presence triggers a reaction between two dissimilar metals.