601. Match the heat treatment processes (Group A) and their associated effects on properties (Group B) of medium carbon steel
     

     Group A	Group B
     P. Tempering	1. Strengthening and grain refinement
     Q. Quenching	2. Inducing toughness
     R. Annealing	3. Hardening
     S. Normalizing	4. Softening

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

   
   
   

   2. P Q R S
      2 3 4 1

   
   
   

   3. P Q R S
      3 2 4 1

   
   
   

   4. P Q R S
      2 3 1 4

   
   
   

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   Tempering increases Toughness. Quenching affects hardening. Annealing affects softening. Normalizing affects strengthening & Grain Refinement.

   Correct Option: B

   Tempering increases Toughness. Quenching affects hardening. Annealing affects softening. Normalizing affects strengthening & Grain Refinement.

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602. The process of reheating the martensitic steel to reduce its brittleness without any significant loss in its hardness is

1. 1. normalising

   
   
   

   2. annealing

   
   
   

   3. quenching

   
   
   

   4. tempering

   
   
   

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1. View Hint View Answer Discuss in Forum

   

   Correct Option: D

   

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603. During normalizing process of steel, the specimen is heated

1. 1. between the upper and lower critical temperature and cooled in still air

   
   
   

   2. above the upper critical temperature and cooled in furnace

   
   
   

   3. above the upper critical temperature and cooled in still air

   
   
   

   4. between the upper and lower critical temperature and cooled in furnace

   
   
   

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1. View Hint View Answer Discuss in Forum

   LCT-Lower Critical Temperature
   UCT-Upper Critical Temperature
   

   Correct Option: C

   LCT-Lower Critical Temperature
   UCT-Upper Critical Temperature
   

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604. Match the items in columns I and II.
     

     Column-I	Column-II
     P. Charpy test	1. Fluidity
     Q. Knoop test	2. Microhardness
     R. Spiral test	3. Formability
     S. Cupping test	4. Toughness
     	5. Permeability

1. 1. P-4, Q-5, R-3, S-2

   
   
   

   2. P-3, Q-5, R-1, S-4

   
   
   

   3. P-2, Q-4, R-3, S-5

   
   
   

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

   
   
   

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1. View Hint View Answer Discuss in Forum

   Charpy Test - Toughness
   Knoop Test - Microhardness
   Spiral Test - Fluidity
   Cupping Test - Formability

   Correct Option: D

   Charpy Test - Toughness
   Knoop Test - Microhardness
   Spiral Test - Fluidity
   Cupping Test - Formability

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605. In ECM the MRR is due to
     

1. 1. Corrosion
      

   
   
   

   2. Erosion
      

   
   
   

   3. Fusion
      

   
   
   

   4. Ion displacement
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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