_________ Is Used to Prevent Duralumin from Corrosion

Q15: Season-cracking can be prevented by cold-working of

Q16: Which of the following is not used

Q17: At what velocity will the particles settle

Q18: Galvanized ion is made by dipping low

Q19: Molybdenum with hydrogen can be used up

Q20: Grit chambers are constructed to prevent their

Q21: As far as safer handling is considered,

Q22: One cubic metre of bone can treat

Q23: Dezincification of brass is prevented by addition

Q24: Which of these materials is not added