431. The material property which depends only on the basic crystal structure is

1. 1. fatigue strength

   
   
   

   2. work hardening

   
   
   

   3. fracture strength

   
   
   

   4. elastic constant

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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432. Which of the following is the correct data structure for solid models?

1. 1. solid part → face → edges → vertices

   
   
   

   2. solid part → edges → faces → vertices

   
   
   

   3. vertices → edges → faces → solid parts

   
   
   

   4. vertices → faces → edges → solid parts

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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433. The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are

1. 1. 1, 2, 2

   
   
   

   2. 1, 2, 4

   
   
   

   3. 2, 3, 4

   
   
   

   4. 2, 4, 4

   
   
   

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1. View Hint View Answer Discuss in Forum

   For a simple cubic unit cell:
   8 corners have 8 atoms and each atom at one corner contributes to 8 unit cells.
   Effective number
   

   = 8 ×	1	= 1
   	8

   
   For Body centred cubic,
   Effective number = 8 corners + 1 centre
   

   = 8 ×	1	+ 1 = 2
   	8

   
   For Face centered cubic,
   effective number = 8 corner + 6 faces
   

   = 8 ×	1	+ 6 ×	1	= 1 + 3 = 4
   	8		2

   
   Therfore, answer is (1, 2, 4)

   Correct Option: B

   For a simple cubic unit cell:
   8 corners have 8 atoms and each atom at one corner contributes to 8 unit cells.
   Effective number
   

   = 8 ×	1	= 1
   	8

   
   For Body centred cubic,
   Effective number = 8 corners + 1 centre
   

   = 8 ×	1	+ 1 = 2
   	8

   
   For Face centered cubic,
   effective number = 8 corner + 6 faces
   

   = 8 ×	1	+ 6 ×	1	= 1 + 3 = 4
   	8		2

   
   Therfore, answer is (1, 2, 4)

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434. The most widely used reinforcement in modern day FRP tennis racket is

1. 1. glass

   
   
   

   2. carbon

   
   
   

   3. aluminium

   
   
   

   4. magnesium

   
   
   

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1. View Hint View Answer Discuss in Forum

   Carbon fibre because of light weight

   Correct Option: B

   Carbon fibre because of light weight

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435. Harden ability of steel is a measure of

1. 1. the maximum hardness that can be obtained when it is austenitized and then quenched

   
   
   

   2. the depth to which required hardening is obtained when it is austenitized and then quenched

   
   
   

   3. the ability to harden when it is cold worked

   
   
   

   4. the ability to retain its hardness when it is heated to elevated temperatures

   
   
   

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1. View Hint View Answer Discuss in Forum

   Harden ability is a measure of the capacity of a steel to be hardened in depth when quenched from its austenitizing temperature.

   Correct Option: B

   Harden ability is a measure of the capacity of a steel to be hardened in depth when quenched from its austenitizing temperature.

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