526. Cutting tools are provided with large positive rake angle mainly for

1. 1. Increasing the strength of the cutting edge

   
   
   

   2. Avoiding rubbing action with the finished surfaces

   
   
   

   3. Reducing the magnitude of the cutting force

   
   
   

   4. Better heat dissipation

   
   
   

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1. View Hint View Answer Discuss in Forum

   As rake angle α increases, shear plane angle φ decreases. So less force is required for cutting.

   Correct Option: C

   As rake angle α increases, shear plane angle φ decreases. So less force is required for cutting.

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527. A steel bar 200 mm in 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

   MRR = πDNd_f
   

   Correct Option: D

   MRR = πDNd_f
   

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528. The normal force acting at the chip-tool interface in N is

1. 1. 1000

   
   
   

   2. 1500

   
   
   

   3. 2000

   
   
   

   4. 2500

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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529. The orthogonal rake angle of the cutting tool in degree is

1. 1. Zero

   
   
   

   2. 3.58

   
   
   

   3. 5

   
   
   

   4. 7.16

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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530. Which of the following process can be used for welding of Aluminum alloys?
     P. Submerged arc welding
     Q. Gas metal arc welding
     R. Electroslag welding
     S. Gas tungsten arc welding

1. 1. P and Q

   
   
   

   2. Q and S

   
   
   

   3. Q and R

   
   
   

   4. R and S

   
   
   

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1. View Hint View Answer Discuss in Forum

   To remove the ceramic layer of aluminium oxide, TIG is used.

   Correct Option: B

   To remove the ceramic layer of aluminium oxide, TIG is used.

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