VSSC Electoplater Paper 2015

Vikram Sarabhai Space Center Electoplater Paper 2015

Valency of Carbon in CCl4 is
(a) 1
(b) 2
(c) 4
(d) 0

A supplementary anode employed during electro-deposition to acheive a desired thickness distribution of the deposit is called
(a) Thief
(b) Robber
(c) Maskant
(d) Auxiliary anode

Damage of a metal or alloy caused by absorption of hydrogen, which may occur during precleaning and/or plating is called
(a) Hydrogen embrittlement
(b) Hydrogen over potential
(c) Hydrogen diffusion
(d) Hydrogen absorption

A table that lists elements in the order of their standard electrode potentials of specified electrochemical reations is called
(a) Periodic Table
(b) Steam table
(c) Transition elements
(d) EMF series

The ability of a coating to cover the part uniformly is called is
(a) Throwing power
(b) Cathode efficiency
(c) Specific conductivity
(d) Current density

____ imparts sacrificial protection
(a) Zinc plating on steel
(b) Nickel plating on steel
(c) Enamel painting on steel
(d) None of the above

The coating formed by Sulphuric acid anodising of Aluminium is of
(a) Aluminium Sulphate
(b) Aluminium oxide
(c) Aluminium Sulphide
(d) Aluminium Hydroxide

A standard Chromium plating electrolyte contains
(a) Potassium dichromate
(b) Sodium dichromate
(c) Chromium hydroxide
(d) Chromic acid

Bleaching powder/ solution is used for the treatment of ____ effluents
(a) Cyanide
(b) Chromate
(c) Acid
(d) Heavy metal

______ is a unit used for specific gravity
(a) gm/Ltr.
(b) ppm
(c) gm/cc
(d) None of the above