41. Match the following products with the suitable manufacturing process
    

    Product	Manufacturing Process
    P. Toothpaste tube	1. Centrifugal casting
    Q. Metallic pipes	2. Blow moulding
    R. Plastic bottles	3. Rolling
    S. Threaded bolts	4. Impact extrusion

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

   
   
   

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

   
   
   

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

   
   
   

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

   
   
   

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1. View Hint View Answer Discuss in Forum

   P – 4, Q – 1, R – 2, S – 3

   Correct Option: C

   P – 4, Q – 1, R – 2, S – 3

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42. In a linearly hardening plastic material, the true stress beyond initial yielding

1. 1. increases linearly with the true strain

   
   
   

   2. decreases linearly with the true strain

   
   
   

   3. first increases linearly and then decreases linearly with the true strain

   
   
   

   4. remain constant

   
   
   

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1. View Hint View Answer Discuss in Forum

   

   Correct Option: A

   

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43. It is desired to make a product having T-shaped cross-section from a rectangular aluminium block. Which one of the following processes is expected to provide the highest strength of the product?

1. 1. Welding

   
   
   

   2. Casting

   
   
   

   3. Metal forming

   
   
   

   4. Machining

   
   
   

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1. View Hint View Answer Discuss in Forum

   Metal forming of Aluminimum is easy because there is negligible strain hardening in Aluminium.

   Correct Option: C

   Metal forming of Aluminimum is easy because there is negligible strain hardening in Aluminium.

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44. Engineering strain of a mild steel sample is recorded as 0.100%. The true strain is

1. 1. 0.010%

   
   
   

   2. 0.055%

   
   
   

   3. 0.099%

   
   
   

   4. 0.101%

   
   
   

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1. View Hint View Answer Discuss in Forum

   Engg. strain ε =	0.1
   	100

   
   True strain ε_T = ln(1 + ε)
   

   = In		1 +	0.1
   			100

   
   = 0.0009995
   ε_T in % = 0.0995%

   Correct Option: C

   Engg. strain ε =	0.1
   	100

   
   True strain ε_T = ln(1 + ε)
   

   = In		1 +	0.1
   			100

   
   = 0.0009995
   ε_T in % = 0.0995%

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45. Match the following products with preferred manufacturing processes:
    

    Product	Process
    P. Rails	1. Blow molding
    Q. Engine crankshaft	2. Extrusion
    R. Aluminium channels	3. Forging
    S. PET water bottles	4. Rolling

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

   
   
   

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

   
   
   

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

   
   
   

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

   
   
   

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1. View Hint View Answer Discuss in Forum

   P–4, Q – 3, R –2, S – 1

   Correct Option: B

   P–4, Q – 3, R –2, S – 1

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