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Engineering :: Metallurgy

181.  The crystal structure of gamma iron is
A. Cubic B. BCC
C. FCC D. HCC
E. Any of the above    
182.  Which of the following form of iron is produced as a result of annealing of white cast iron?
A. Malleable iron B. Grey iron
C. Nodular iron D. Spheroidal iron
E. Wrought iron    
183.  The crystal structure of brass is
A. BCC B. FCC
C. HCP D. Orthorhombic
E. Mixture of all above    
184.  Which of the following is not a constituent of Stellite?
A. Cobalt B. Tungsten
C. Ferrous D. Chromium
E. All of the above    
185.  Which of the following material is generally not used as deoxidiser for producing killed steel?
A. Copper B. Ferro-silicon
C. Ferro-manganese D. Aluminium
E. All of the above    
186.  Machinability of metal depends on
A. Hardness B. Hardness and tensile strength
C. Brittleness D. Brittleness and toughness
E. None of the above    
187.  Silicon when added to copper increases its
A. Machinability B. Brittleness
C. Malleability D. Hardness
E. Electrical conductivity    
188.  Which of the following material is not used for cyaniding?
A. Sodium carbonate B. Sodium chloride
C. Sodium hydroxide D. Sodium cyanide
E. All of the above    
189.  The percentage of sulphur in steel can be reduced by adding
A. Manganese B. Copper
C. Zinc D. Magnesium
E. Chormium    
190.  Which of the following material is added to cast iron to obtain nodular cast iron?
A. Chromium B. Copper
C. Magnesium D. Manganese
E. Molybdenum    

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