In pickling and etching _________ acids are used
a) Sulphuric acid b) Hypo chlorous acid c) Phosphoric acid d) Phosphorous acid
a) Sulphuric acid b) Hypo chlorous acid c) Phosphoric acid d) Phosphorous acid
a) Silicosis b) Chicken guinea c) Blue baby syndrome d) Flourosis
a) Anodic coatings b) Cathodic coatings c) Neither anode nor cathode d) Both anode and cathode
a) Higher b) Lower c) 0 d) Cannot be said
A. 25-100atm B. 50-100atm C. 70-100atm D. 100-250atm