216. Which one of the following is not a property of a sand mould?

1. 1. Permeability

   
   
   

   2. Collapsibility

   
   
   

   3. Strength

   
   
   

   4. Fluidity

   
   
   

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   NA

   Correct Option: D

   NA

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217. Match the following Process
     P. Green sand moulding
     Q. Shell moulding
     R. Investment moulding
     S. Ceramic moulding Mould making technique
     1. Pouring
     2. Dipping
     3. Compaction
     4. Resin bonding
     

1. 1. P – 3, a –4, R –2, S1

   
   
   

   2. P – 4, a –3, R –2, S1

   
   
   

   3. P – 1, a –4, R –2, S3

   
   
   

   4. P – 2, a –4, R –3, S1

   
   
   

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   P – 3, a –4, R –2, S1

   Correct Option: A

   P – 3, a –4, R –2, S1

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218. Shell moulding is an investment casting process (T/F)

1. 1. False

   
   
   

   2. True

   
   
   

   3. NA

   
   
   

   4. NA

   
   
   

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   False

   Correct Option: A

   False

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219. Bentonite is commonly used bonding material for dry sand cores

1. 1. Bentonite is an additive.

   
   
   

   2. Bentonite is an non-additive.

   
   
   

   3. Both A and B

   
   
   

   4. None of the above

   
   
   

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   Bentonite is an additive.

   Correct Option: A

   Bentonite is an additive.

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220. Electrical switches made out of thermoset materials are produced by

1. 1. Compression moulding

   
   
   

   2. Transfer moulding

   
   
   

   3. Injection moulding

   
   
   

   4. Vacuum moulding

   
   
   

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   NA

   Correct Option: A

   NA

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