336. To get good surface finish on a turned job, one should use a sharp tool with... feed rate and... speed of rotation of the job.

1. 1. Higher speed for higher heat dissipation

   
   
   

   2. Higher speed for Low heat dissipation

   
   
   

   3. Low speed for Low heat dissipation

   
   
   

   4. Low speed for Higher heat dissipation

   
   
   

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1. View Hint View Answer Discuss in Forum

   Small feed rate
   

   Hmax =	f2
   	8R

   
   H_max ↑ f ↑
   Higher speed for higher heat dissipation.

   Correct Option: A

   Small feed rate
   

   Hmax =	f2
   	8R

   
   H_max ↑ f ↑
   Higher speed for higher heat dissipation.

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337. In small lot production for machining T-slots on machine tables, it is expected to use

1. 1. Shaping machine

   
   
   

   2. Broaching machine

   
   
   

   3. Vertical milling machine

   
   
   

   4. Horizontal milling machine

   
   
   

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1. View Hint View Answer Discuss in Forum

   Vertical milling machine

   Correct Option: C

   Vertical milling machine

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338. Minimum dimensional and form accuracy can be obtained in the cylinder bores of automobile engines if the bores are finished by

1. 1. Lapping

   
   
   

   2. Reaming

   
   
   

   3. Internal grinding

   
   
   

   4. Honing

   
   
   

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1. View Hint View Answer Discuss in Forum

   Honing is an abrasive process per formed by a set of banded abrasive sticks. surface finish 0.12 um.
   

   Correct Option: D

   Honing is an abrasive process per formed by a set of banded abrasive sticks. surface finish 0.12 um.
   

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339. Teeth of internal spur gears can be accurately cut in a

1. 1. Milling machine

   
   
   

   2. Gear shaping machine

   
   
   

   3. Slotting machine

   
   
   

   4. Hobbing machine

   
   
   

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1. View Hint View Answer Discuss in Forum

   Gear hobbing produces most accurate external gear but cannot generate internal gear.

   Correct Option: B

   Gear hobbing produces most accurate external gear but cannot generate internal gear.

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340. Gear hobbing produces more accurate gears than milling because in hobbing

1. 1. there is a continuous indexing operation

   
   
   

   2. pressure angle is larger than in milling

   
   
   

   3. hob and work piece both are rotating

   
   
   

   4. a special multi-tooth cutter (hob) is used

   
   
   

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1. View Hint View Answer Discuss in Forum

   Gear hobbing is generating process and gear milling is gear cutting process.

   Correct Option: D

   Gear hobbing is generating process and gear milling is gear cutting process.

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