76. A milling cutter having 10 teeth is rotating at 100 rpm. The table feed is set at 50-mm per minute. The feed per tooth in mm is

1. 1. 5

   
   
   

   2. 0.5

   
   
   

   3. 0.2

   
   
   

   4. 0.05

   
   
   

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1. View Hint View Answer Discuss in Forum

   ⇒ - 10 = y +	y
   	10

   Correct Option: D

   ⇒ - 10 = y +	y
   	10

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77. In horizontal milling process (up/down) milling provides better surface finish and (up/down) milling provide longer tool life.

1. 1. Up milling process provide better surface finish because it start cutting process with unfinished surface & in down milling longer tool life because of relative velocity between chip & tool so lower temperature hence less diffusion.

   
   
   

   2. Down milling process provide better surface finish because it start cutting process with unfinished surface & in down milling longer tool life because of relative velocity between chip & tool so lower temperature hence less diffusion.

   
   
   

   3. Down milling process provide better surface finish because it start cutting process with unfinished surface & in down milling longer tool life because of relative velocity between chip & tool so higher temperature hence less diffusion.

   
   
   

   4. Down milling process provide better surface finish because it start cutting process with finished surface & in down milling longer tool life because of relative velocity between chip & tool so lower temperature hence less diffusion.

   
   
   

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1. View Hint View Answer Discuss in Forum

   Down milling process provide better surface finish because it start cutting process with unfinished surface & in down milling longer tool life because of relative velocity between chip & tool so lower temperature hence less diffusion.

   Correct Option: B

   Down milling process provide better surface finish because it start cutting process with unfinished surface & in down milling longer tool life because of relative velocity between chip & tool so lower temperature hence less diffusion.

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78. Component process
    A. Square hole in a high strength alloy
    B. Square hole in a ceramic component
    C. Blind holes in a die
    D. Turbine blade profile on high strength alloy
    1. Milling
    2. Drilling
    3. ECM
    4. Jig boring
    5. EDM
    6. USM

1. 1. A–5, B–6, C–1, D–3

   
   
   

   2. A–5, B–5, C–2, D–3

   
   
   

   3. A–1, B–6, C–2, D–3

   
   
   

   4. A–5, B–6, C–2, D–3

   
   
   

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1. View Hint View Answer Discuss in Forum

   A–5, B–6, C–2, D–3

   Correct Option: D

   A–5, B–6, C–2, D–3

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79. Abrasive material used in grinding wheel selected for grinding ferrous alloys is

1. 1. SiC

   
   
   

   2. Diamond

   
   
   

   3. Al203

   
   
   

   4. Boron carbide

   
   
   

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1. View Hint View Answer Discuss in Forum

   Less chance of wheel wear. Other wise all other to ferrous material.

   Correct Option: C

   Less chance of wheel wear. Other wise all other to ferrous material.

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80. A conventional lathe and a CNC lathe are under consideration for machining a given part. The relevant data are shown below:
    
    The machine preferred for producing 100 pieces is

1. 1. conventional lathe

   
   
   

   2. CNC lathe

   
   
   

   3. any of the above

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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