CNC G-codes MCQ Quiz
1. What does the G in G-code stand for?
A) GeometryB) Generic
C) Guide
D) General
Answer: D) General
2. What is the function of G00 in CNC programming?
A) Linear interpolationB) Circular interpolation clockwise
C) Circular interpolation counterclockwise
D) Rapid positioning
Answer: D) Rapid positioning
3. Which G-code is used for linear interpolation?
A) G00B) G01
C) G02
D) G03
Answer: B) G01
4. Which G-code is used for circular interpolation in a clockwise direction?
A) G00B) G01
C) G02
D) G03
Answer: C) G02
5. Which G-code is used to specify the absolute positioning system?
A) G17B) G20
C) G90
D) G91
Answer: C) G90
6. What does G28 command do?
A) Set the tool offsetB) Return to machine home
C) Start spindle rotation
D) Change the tool
Answer: B) Return to machine home
7. Which G-code is used to specify incremental positioning?
A) G17B) G21
C) G90
D) G91
Answer: D) G91
8. What is the purpose of the G54 command?
A) Select work coordinate systemB) Return to home position
C) Set feed rate
D) Change tool
Answer: A) Select work coordinate system
9. Which G-code is used for dwell (pause) in CNC programming?
A) G04B) G08
C) G12
D) G20
Answer: A) G04
10. What does G40 command cancel?
A) Work coordinate systemB) Tool length offset
C) Cutter radius compensation
D) Program stop
Answer: C) Cutter radius compensation
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