286. The most common interpolation methods in continuous path NC machining are

1. 1. linear and circular

   
   
   

   2. linear and parabolic

   
   
   

   3. circular and parabolic

   
   
   

   4. circular and elliptic

   
   
   

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   linear and circular

   Correct Option: A

   linear and circular

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287. If the z-axis and x-axis of CNC lathe are provided with straight line controls, it is possible to carry out

1. 1. Turning and facing only

   
   
   

   2. Turning, facing and taper turning

   
   
   

   3. turning, facing and thread cutting

   
   
   

   4. Turning, facing and drilling

   
   
   

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1. View Hint View Answer Discuss in Forum

   Turning, facing and taper turning

   Correct Option: B

   Turning, facing and taper turning

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288. Interpolator in a CNC machine

1. 1. controls spindle speed

   
   
   

   2. coordinates axes movements

   
   
   

   3. operates tool changer

   
   
   

   4. commands canned cycle

   
   
   

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   coordinates axes movements

   Correct Option: B

   coordinates axes movements

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289. Circular arc on a part profile is being machined on a vertical CNC milling machine, CNC part program using metric units with absolute dimensions is listed below:
     ............................................
     N60 G01 X 30 Y 55 Z 5 F50
     N70 G02 X 50 Y 35 R 20
     N80 G01 Z 5
     ............................................
     The coordinates of the centre of the circular arc are:

1. 1. (30, 55)

   
   
   

   2. (50, 55)

   
   
   

   3. (50, 35)

   
   
   

   4. (30, 35)

   
   
   

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1. View Hint View Answer Discuss in Forum

   

   Correct Option: D

   

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290. Match the following part programming codes with their respective functions
     Part Programming Codes
     P. G01
     Q. G03
     R. M03
     S. M05
     Functions
     I. Spindle stop
     II. Spindle rotation, clockwise
     III.Circular interpolation, anticlockwise
     IV. Linear interpolation

1. 1. P-II, Q-I, R-IV, S-III

   
   
   

   2. P-IV, Q-II, R-III, S-I

   
   
   

   3. P-IV, O-III, R-II, S-I

   
   
   

   4. P-III, Q-IV, R-II, S-I

   
   
   

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1. View Hint View Answer Discuss in Forum

   P-IV, Q-III, R-II, S-I

   Correct Option: C

   P-IV, Q-III, R-II, S-I

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