Building Materials, Third Edition

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1. The crudest form of iron is
   (a) mild steel (b) pig iron (c) wrought iron (d) cast iron


2. The stainless steel consists of
   (a) 16% chromium (b) 35% nickel (c) 30% nickel (d) 12–15% manganese


3. Which of the following pairs are correctly matched?
   
   
   1. Alpha iron Non-magnetic
   
   
   2. Beta iron Strongly magnetic
   
   
   3. Gamma iron Non-magnetic and capable of dissolving carbon
   
   
   4. Delta iron Non-magnetic and absorbs very little carbon
   
   
   
   

Select the correct answer using the codes given below:

(a) 3 and 4 (b) 1 and 2 (c) l, 3 and 4 (d) 2 and 4

4. Match List-I with List-II and select the correct answer using the codes given below the
   lists:
   List-I List-II
   A. Ductility 1. Failure without warning
   B. Brittleness 2. Drawn permanently over great changes of shape without rupture
   C. Tenacity 3. Absorption of energy at high stress without rupture
   D. Toughness 4. High tensile strength

Codes:
(a) A B C D (b) A B C D
1 243 1 2 34
(c) A B C D (d) A B C D
2 341 2 1 43

5. Match List-I with List-II and select the correct answer using the codes given below the
   lists:
   List-I List-II
   (Ferrous Metal)(Furnace)
   A. Pig iron 1. Cupola
   B. Cast iron 2. Puddling
   C. Wrought iron 3. Bessemer converter
   D. Steel 4. Blast
   Codes:
   (a) A B C D (b) A B C D
   1 234 4 2 13
   (c) A B C D (d) A B C D
   4 123 3 1 24


6. Match List-I with List-II and select the correct answer using the codes given below the lists:
   List-I List-II
   A. Pig iron 1. L.D. process
   B. Cast iron 2. Reverberatory furnace
   C. Wrought iron 3. Cupola furnace
   D. Steel 4. Electric reduction furnace