CNC Program Execution Modes Quiz
1. What does MDI stand for in CNC programming?
A) Machine Direct Interface
B) Manual Data Input
C) Machine Digital Instruction
D) Manual Direct Interface
2. In single block mode, what happens when a CNC program runs?
A) The entire program runs automatically
B) The machine stops after each program block
C) The program runs at maximum speed
D) No machine movement occurs
3. Which CNC execution mode allows an operator to input commands directly?
A) Auto mode
B) Single block mode
C) Manual mode
D) MDI mode
4. What is the primary advantage of single block mode?
A) Faster program execution
B) Debugging and checking program steps
C) Reducing machine wear
D) Increasing production speed
5. In auto mode, what typically happens during program execution?
A) The operator must press a button for each step
B) The program runs continuously without stopping
C) The machine pauses randomly
D) No machining occurs
6. Which mode is best for testing new CNC programs?
A) Auto mode
B) MDI mode
C) Single block mode
D) Continuous mode
7. What does a CNC program "block" typically represent?
A) A machine error
B) A complete machining instruction
C) A programming language
D) A machine component
8. When would an operator most likely use MDI mode?
A) During mass production
B) For creating complex designs
C) Making quick, manual adjustments
D) Printing program documentation
9. In single block mode, how does an operator proceed through the program?
A) Automatically
B) By pressing a continue or step button
C) By voice command
D) Randomly
10. What is the primary purpose of different CNC execution modes?
A) To confuse operators
B) To increase machine complexity
C) To provide flexibility in program control
D) To reduce machine speed
Answer Key:
1. B
2. B
3. D
4. B
5. B
6. C
7. B
8. C
9. B
10. C
Scoring Guide:
9-10 correct: Excellent CNC Programming Understanding!
7-8 correct: Great Job!
5-6 correct: Good Start
0-4 correct: Keep Studying
Note: This quiz tests understanding of CNC programming modes, focusing on critical thinking and conceptual knowledge appropriate for 6th-grade students learning about basic machine programming concepts.
CNC Theory & MCQ English Book
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