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In computer aided part programming by Automatically Program Tool (APT), “COOL NT / ON” is 
1. Geometry Statement
2.  Motion Statement
3. Post Processor Statement
4. Set up Statement

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Correct Answer - Option 3 : Post Processor Statement

Explanation :

APT Language:

The APT language consists of many different type of statement made up of the following valid letters, numerals and punctuation marks.

Letters: ABCDEFGHZ

Numerals: 0 1 2 3 4 5

Punctuation marks

  • / - a slash divides a statement into two sections eg. GO / PAST .
  • , - a comma is used as a separator between the elements in a statement  eg. MACHIN / DRILL , 2 .
  • = - an equals is used for assigning an entity to a symbolic name eg. P1 = POINT / 25,50,30.

The complete APT part program consists of the following four types of statements

  • Geometry
  • Motion 
  • Post-processor
  • Compilation control / setup

Geometry statement 

In this statement point, line, circle, ellipse coordinates are written. eg.

  • P1 = POINT/10, 10 ,0.
  • P2 = POINT/20, 10, 0.
  • L1 = LINE/P2. ATANGL, 90, XAXIS. ( means line L1 which is made by point 2 and 90° angle from x-axis)
  • C1 = CIRCLE/CENTER, P1, RADIUS, 20. (means circle which center is point 1 and radius is 20 mm).

Motion statement

In this statement spindle speed, feed rate is written .eg.

  • FEDRAT/200
  • SPINDL/500, CLW (means spindle speed is 500 rpm and rotating in anti-clockwise direction)

Postprocessor statement

In this statement coolant on,off, spindle off are written eg.

  • COOLANT/ON
  • COOLANT/OFF
  • SPINDL/OFF

Compilation control / setup statement 

In this statement, we write all the miscellaneous thing eg.

  • RAPI
  • END
  • FINI

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