656. A steel bar 200 mm in a diameter is turned at a feed of 0.25 mm/rev. with a depth of cut of 4 mm. The rotational speed of the workpiece is 160 rpm. The material removal rate in mm³ / s is
     

1. 1. 160
      

   
   
   

   2. 167.6
      

   
   
   

   3. 1600
      

   
   
   

   4. 1675.5

   
   
   

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1. View Hint View Answer Discuss in Forum

   Material removal rate (MRR) in mm³/s MRR = f.d × V
   

   MRR = 0.25 × 4 ×	π × 200 × 160	= 1675.5 mm3/s
   	60

   Correct Option: D

   Material removal rate (MRR) in mm³/s MRR = f.d × V
   

   MRR = 0.25 × 4 ×	π × 200 × 160	= 1675.5 mm3/s
   	60

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657. Match the following materials with their most appropriate application.
     

     Material	Application
     1. Low carbon steel	P. Machine tool base
     2. Stainless steel	Q. Aircraft parts
     3. Gray cast iron	R. Kitchen utensils
     4. Titanium alloys	S. Car body panels

     
     

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

   
   
   

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

   
   
   

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

   
   
   

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

   
   
   

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1. View Hint View Answer Discuss in Forum

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

   Correct Option: D

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

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658. Assertion (A) : The ratio of uncut chip thickness to actual chip thickness is always less than one and is termed as cutting ratio in orthogonal cutting.
     Reason (R) : The frictional force is very high due to the occurrence of sticking friction rather than sliding friction.
     

1. 1. Both A and R are true and R is the correct explanation of A
      

   
   
   

   2. Both A and R are true but R is not a correct explanation of A
      

   
   
   

   3. A is true but R is false
      

   
   
   

   4. A is false but R is true

   
   
   

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1. View Hint View Answer Discuss in Forum

   Sliding friction is very higher

   Correct Option: C

   Sliding friction is very higher

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659. Match List-I (Cutting tool materials) with ListII (Manufacturing methods) and select the correct answer using the codes given below :
     

     List-I	List-II
     A. HSS	1. Casting
     B. Satellite	2. Forging
     C. Cemented carbide	3. Rolling
     D. UCON	4. Extrusion
     	5. Powder metallurgy

     
     

1. 1. A - 3 , B - 1 , C - 5 , D - 2
      

   
   
   

   2. A - 2 , B - 5 , C - 4 , D - 3
      

   
   
   

   3. A - 3 , B - 5 , C - 4 , D - 2
      

   
   
   

   4. A - 2 , B - 1 , C - 5 , D - 3

   
   
   

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1. View Hint View Answer Discuss in Forum

   HSS – Forging Stellite – Casting Cementite – Powder metallurgy UCON – Rolling

   Correct Option: D

   HSS – Forging Stellite – Casting Cementite – Powder metallurgy UCON – Rolling

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660. Match List-I with List-II and select the correct answer using the codes given below :
     

     List-I	List-II
     A. Plane approach angle	1.Tool face
     B. Rake angle	2.Tool flank
     C. Clearances angle	3.Tool face and flank
     D. Wedge angle	4.Cutting edge
     	5.Tool nose

     
     

1. 1. A - 1 , B - 4 , C - 2 , D - 5
      

   
   
   

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

   
   
   

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

   
   
   

   4. A - 1 , B - 4 , C - 3 , D - 5

   
   
   

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1. View Hint View Answer Discuss in Forum

   
   

   Correct Option: C

   
   

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