211. Which of the following casting processes uses expandable pattern and expandable mould?

1. 1. Shell mould casting

   
   
   

   2. Investment casting

   
   
   

   3. Pressure die casting

   
   
   

   4. Centrifugal casting

   
   
   

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   NA

   Correct Option: A

   NA

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212. In sand casting fluidly of the molten metal increases with

1. 1. Increase in degree of superheat

   
   
   

   2. Decrease in pouring rate

   
   
   

   3. Increase in thermal conductivity of the mould

   
   
   

   4. Increase in sand grain size

   
   
   

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   NA

   Correct Option: D

   NA

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213. Hot chamber die casting is not suited for

1. 1. Lead and its alloys

   
   
   

   2. Zinc and its alloys

   
   
   

   3. Tin and it's alloys

   
   
   

   4. Aluminum and its alloys

   
   
   

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   NA

   Correct Option: A

   NA

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214. In hollow cylindrical parts made by centrifugal castings, the density of the part is

1. 1. Maximum at the outer region

   
   
   

   2. Maximum at the inner region

   
   
   

   3. Maximum at the mid point between outer and inner surfaces

   
   
   

   4. Uniform throughout

   
   
   

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   NA

   Correct Option: C

   NA

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215. Match the following
     Group-I
     P. Sand casting
     Q. Centrifugal casting
     R. Investment casting
     S. Die casting
     Group-I I
     1. Turbine blades
     2. IC Engine
     3. Large bells
     4. Pulleys

1. 1. P Q R S
      4 1 3 2

   
   
   

   2. P Q R S
      2 4 3 1

   
   
   

   3. P Q R S
      3 4 1 2

   
   
   

   4. P Q R S
      3 2 1 4

   
   
   

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   NA

   Correct Option: D

   NA

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