Question: Chilled cast iron has
A. No graphite
B. A very high percentage of graphite
C. A low percentage of graphite
D. Graphite as its basic constituent of composition
Answer: Option A
Explanation :

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Question 1. Malleable cast iron
  1.     Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
  2.     Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
  3.     Is produced by annealing process. It is soft, tough, and easily machined metal
  4.     Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material
Answer: Option C
Explanation :
Question 2. Bell metal contains
  1.     70% copper and 30% zinc
  2.     90% copper and 10% tin
  3.     85 - 92% copper and rest tin with little lead and nickel
  4.     70 - 75% copper and rest tin
Answer: Option D
Explanation :
Question 3. Chilled cast iron has
  1.     No graphite
  2.     A very high percentage of graphite
  3.     A low percentage of graphite
  4.     Graphite as its basic constituent of composition
Answer: Option A
Explanation :
Question 4. The aluminium alloy, mainly used, for anodized utensil manufacture, is
  1.     Duralumin
  2.     Y-alloy
  3.     Magnalium
  4.     Hindalium
Answer: Option D
Explanation :
Question 5. Which is false statement about normalizing? normalizing is done to
  1.     Refine grain structure
  2.     Reduce segregation in casting
  3.     Improve mechanical properties
  4.     Induce stresses
Answer: Option D
Explanation :
Question 6. Tungsten in steel
  1.     Improves wear resistance, cutting ability and toughness
  2.     Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
  3.     Improves cutting ability and reduces hardenability
  4.     Gives ductility, toughness, tensile strength and anti-corrosion properties
Answer: Option B
Explanation :

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