CNC Machining Basics: G and M Codes Quiz
1. What does a G-code primarily do in CNC machining?
A) Control machine power
B) Specify machine movements and operations
C) Measure cutting tool temperature
D) Determine material hardness
2. Which M-code typically tells the machine to stop coolant flow?
A) M03
B) M05
C) M08
D) M09
3. The G-code G00 represents:
A) Precise cutting movement
B) Rapid positioning movement
C) Circular interpolation
D) Slow feed rate movement
4. What does M06 typically instruct a CNC machine to do?
A) Start spindle rotation
B) Stop spindle rotation
C) Change cutting tool
D) Turn on coolant
5. Which statement best describes the relationship between G-codes and M-codes?
A) G-codes control machine movements, M-codes control auxiliary functions
B) G-codes and M-codes are exactly the same
C) M-codes control only cutting speeds
D) G-codes are used only in turning operations
6. A G02 code typically indicates:
A) Linear movement
B) Clockwise circular movement
C) Counter-clockwise movement
D) Rapid positioning
7. What is the primary purpose of using M-codes in CNC machining?
A) Calculating material removal rates
B) Controlling secondary machine functions
C) Measuring tool wear
D) Determining cutting angles
8. In CNC turning, which code would typically start spindle rotation?
A) G00
B) M03
C) G02
D) M06
9. What does a G01 code represent?
A) Rapid positioning
B) Linear interpolation (controlled feed movement)
C) Circular movement
D) Tool change
10. Which of the following is NOT a typical function of M-codes?
A) Controlling coolant
B) Managing tool changes
C) Calculating cutting speeds
D) Controlling spindle rotation
Answer Key:
1. B
2. D
3. B
4. C
5. A
6. B
7. B
8. B
9. B
10. C
Scoring Guide:
9-10 correct: Excellent CNC Machining Understanding!
7-8 correct: Strong Technical Knowledge
5-6 correct: Good Foundational Understanding
0-4 correct: More Study Recommended
Note: This quiz is designed to introduce basic CNC machining concepts at a middle school level, focusing on understanding G and M codes' fundamental roles.
CNC Theory & MCQ English Book
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