[I] Choose Correct Answers
1. Which one is not a step in powder metallurgy
(a) Blending (b) Sintering (c) Compacting (d) Casting
2. For preparing metal powder in ball mill we used balls made of
(a) Iron (b) Alluminium (c) Hard steel (d) Copper
3. The law used for electroplasting is
(a) Electrolysis (b) Faraday’s Law
(c) Coloumb’s Law (d) Electromagnetic Law
4. In hot dipping process a solution used in
(a) ZnSO4 and H2SO4 (b) SnCl2 and HCl
(c) Na2SO4 and NaCl (d) None of these
[II] Fill in the Blanks
5. Powder metallurgy process makes use of ......................... and .........................
6. ......................... production rate can be achieved in powder metallurgy process.
[III] True or False Statements
7. Sintering is a very important phase in powder metallurgy.
8. Blow moulding is used for thermoplastic materials for making bottles.
9. Galvanizing involves tin coating on an article.
10. Common plating materials are Chromium, Nickel, Copper etc, in an electroplating process.
11. Compression moulding is used for thermosetting plastics.
1. (d) 2. (c) 3. (a) 4. (b)
5. heat, pressure 6. High
7. (T) 8. (T) 9. (F) 10. (T)
