CNC Lathe Positioning and Repeatability Quiz for Middle School Students
Quiz Instructions: Read each question carefully and select the BEST answer.
1. What does "positioning accuracy" in a CNC lathe most closely represent?
A) How fast the machine can move
B) How close the machine gets to a targeted position in one movement
C) How many parts the machine can make per hour
D) The weight of the machine's cutting tool
2. Repeatability is BEST described as:
A) Always hitting the exact center of a target
B) The machine's ability to return to the same position consistently
C) How quickly a machine can complete a task
D) The total number of parts produced
3. Which factor does NOT significantly influence positioning accuracy?
A) Mechanical structure of the machine
B) Drive system precision
C) The color of the machine's paint
D) Temperature variations
4. If a CNC lathe has "high repeatability but low accuracy", this means:
A) The machine always hits the exact target
B) The machine consistently returns to the wrong position
C) The machine breaks down frequently
D) The machine cannot function at all
5. Positioning accuracy is typically measured in:
A) Kilometers
B) Pounds
C) Micrometers
D) Hours
6. Why is repeatability important in manufacturing?
A) It ensures parts in a batch look exactly the same
B) It makes machines run faster
C) It reduces the machine's weight
D) It increases the machine's electricity consumption
7. What happens when a CNC lathe has both high accuracy and high repeatability?
A) The machine becomes very expensive
B) Parts are consistently produced on target
C) The machine runs slower
D) The machine requires more maintenance
8. Backlash in a CNC lathe refers to:
A) The machine's ability to play music
B) The play or movement between mechanical components
C) The machine's color scheme
D) How loud the machine is during operation
9. Which environmental factor can impact a CNC lathe's performance?
A) Wind speed
B) Humidity
C) Temperature variations
D) Sunlight intensity
10. The primary goal of understanding positioning accuracy and repeatability is to:
A) Make machines more colorful
B) Increase machine speed
C) Produce high-quality and consistent parts
D) Reduce machine weight
Answer Key:
1. B
2. B
3. C
4. B
5. C
6. A
7. B
8. B
9. C
10. C
Scoring:
9-10 correct: Machining Master!
7-8 correct: Precision Pro
5-6 correct: Learning the Basics
0-4 correct: Keep Studying!
CNC Theory & MCQ English Book
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