Quiz: Control Systems and Feedback Fundamentals
Name: ______________________ Date: ________________
Multiple Choice Quiz
1. What is the primary purpose of negative feedback in a control system?
A) To make the system unstable
B) To increase the error between desired and actual output
C) To reduce the error and improve system stability
D) To create random system responses
2. In a CNC machine, what does linear interpolation (G01) specifically do?
A) Create circular movements
B) Move the cutting tool in a straight line between points
C) Generate random tool paths
D) Stop the machine's movement completely
3. Which type of control system does NOT use feedback to adjust its performance?
A) Closed loop control system
B) Open loop control system
C) Robotic control system
D) Thermostat control system
4. A thermostat is an excellent example of:
A) Positive feedback
B) Negative feedback
C) No feedback
D) Random feedback
5. What makes closed loop control systems more accurate than open loop systems?
A) They are more expensive
B) They have more complex components
C) They continuously monitor and adjust output
D) They use more sensors
6. Helical interpolation in CNC machining is typically used for:
A) Creating perfectly straight lines
B) Machining threads and helical features
C) Stopping machine movement
D) Generating random tool paths
7. Which statement best describes positive feedback?
A) It always stabilizes a system
B) It reduces errors in the system
C) It reinforces the input signal
D) It works exactly like negative feedback
8. An electric fan without speed adjustment is an example of:
A) Closed loop control
B) Open loop control
C) Negative feedback
D) Complex interpolation
9. In a cruise control system, what helps maintain a constant vehicle speed?
A) Random adjustments
B) Completely fixed settings
C) Continuous feedback and correction
D) Ignoring speed changes
10. What is the primary role of an interpolator in a CNC machine?
A) To create random tool movements
B) To calculate intermediate points for smooth tool paths
C) To stop the machine
D) To increase machine complexity
Answer Key:
1. C
2. B
3. B
4. B
5. C
6. B
7. C
8. B
9. C
10. B
Scoring:
9-10 correct: Excellent understanding!
7-8 correct: Great job!
5-6 correct: Good effort, review the material
0-4 correct: Study more carefully
CNC Theory & MCQ English Book
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