Chemical Engineering MCQs

6108 MCQs  (Page 443 of 611)

Which one occupies the lowermost position in the electromotive series of metals ?
A. Aluminium
B. Noble metals (ag, pt, au)
C. Zinc
D. Alkali metals (k, na, li)
‘Semi steel’ is__________________?
A. Produced by adding 10-20% steel to the cupola charge
B. Stronger than cast iron
C. Both a. and b.
D. Neither a. nor b.
When iron is rusted, it is__________________?
A. Converted to a fine powder
B. Reduced
C. Oxidised
D. None of these
Post weld heat treatment is done by____________________?
A. Normalising
B. Stress relieving
C. Tempering
D. Solution annealing