246. At 1000°C the crystallographic structure of iron is _______.

1. 1. due to Austenitic structure.

   
   
   

   2. → due to crystallographic structure.

   
   
   

   3. FCC → due to crystallographic structure.

   
   
   

   4. FCC → due to Austenitic structure.

   
   
   

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1. View Hint View Answer Discuss in Forum

   FCC → due to Austenitic structure.

   Correct Option: D

   FCC → due to Austenitic structure.

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247. At the last hammer stroke the excess material from the finishing cavity of a forging die is pushed into _______.

1. 1. Gulter is provided in finishing stroke.

   
   
   

   2. hammer is provided in finishing stroke.

   
   
   

   3. hammer

   
   
   

   4. stroke

   
   
   

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1. View Hint View Answer Discuss in Forum

   Gulter is provided in finishing stroke.

   Correct Option: A

   Gulter is provided in finishing stroke.

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248. The relationship between true strain (ε_T) and engineering strain (ε_E) in a uniaxial tension test is given as

1. 1. ε_E = In(1 + ε_T)

   
   
   

   2. ε_E = In(1 – ε_T)

   
   
   

   3. ε_T = In (1 + ε_E)

   
   
   

   4. ε_T = In (1 – ε_E)

   
   
   

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1. View Hint View Answer Discuss in Forum

   εtrue = Lf∫Lo	dL	= In		1 +	∆L
   	L				Lo

   
   

   But	∆	= εL ⇒ εtrue = In(1 + εE)
   	Lo

   Correct Option: C

   εtrue = Lf∫Lo	dL	= In		1 +	∆L
   	L				Lo

   
   

   But	∆	= εL ⇒ εtrue = In(1 + εE)
   	Lo

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249. Match the following metal forming processes with their associated stresses in the workpiece
     Metal forming process
     A. Coining
     B. Wire Drawing
     C. Blanking
     D. Deep Drawing
     Type of stress
     1. Tensile
     2. Shear
     3. Tensile and compressive
     4. Compressive Codes:

1. 1. A B C D
      4 1 2 3

   
   
   

   2. A B C D
      4 1 3 2

   
   
   

   3. A B C D
      1 2 4 3

   
   
   

   4. A B C D
      1 3 2 4

   
   
   

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1. View Hint View Answer Discuss in Forum

   A – 4 B – 1 C – 2 D – 3

   Correct Option: A

   A – 4 B – 1 C – 2 D – 3

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250. The operation in which oil is permeated into the pores of a powder metallurgy product is known as

1. 1. mixing

   
   
   

   2. sintering

   
   
   

   3. impregnation

   
   
   

   4. infiltration

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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