• The Hong Kong University of Science and Technology

• MECH 190

Quiz 5 – With solutions (Lectures 13 Controls & 14 Robots & Automation)

1. Which of the following descriptions about control is NOT correct?

A. Control is a sequence of decisions and actions aimed at attaining specified objectives in an

environment of uncertainty and the presence of disturbances.

B. To control an object means to influence its behavior to achieve the desired goal.

C. Control is a critical enabling technology in all branches of engineering.

D. Control is often visible to the user.

2. Which of the following descriptions about the closed-loop control system is NOT correct?

A. Must have feedback.

B. Always negative feedback.

C. Easy to control output with accuracy,

D. Must have a sensor on output.

3. Which of the following descriptions about control problems is correct?

A. The high-speed railway turn with truncated cone wheels, which provide different ω.

B. The high-speed railway turn with cylinder wheels, which provide different ω.

C. The high-speed railway turn with truncated cone wheels, which provide different r.

D. The high-speed railway turn with cylinder wheels, which provide different r.

4. Which of the following aspects should be considered when designing a controller?

 measurement noise,  actuator imperfections,  model uncertainty.

A.  and .

B.  and .

C.  and .

D. , , and .

5. Which of the following orders is right to design a control system?

A. Conceptual design → Quantitative design → Hardware Implementation.

B. Conceptual design → Hardware Implementation → Quantitative design.

C. Hardware Implementation → Conceptual design → Quantitative design.

D. Quantitative design → Conceptual design → Hardware Implementation.

6. To be qualified as a robot, a machine does not need to be able to?

A. Get information from its surroundings.

B. Do something physical.

C. Interact with human beings.

D. Program itself.

7. Which of the following terms is NOT included in “4D” environments?

A. Difficult.

B. Dull.

C. Dispensable.

D. Dangerous.

8. Which of the following statements is NOT the reason for using robots?

A. Increase product quality.

B. Increase manufacturing lead time.

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C. Increase efficiency.

D. Increase productivity.

9. Which of the following statements is NOT correct about the performance of robots?

A. Larger volume costs more but can increase the capabilities of a robot.

B. Faster spend often increases resolution but also increases cost.

C. Speed can be limited by the task the robot performs.

D. Repeatability caries depending on position and load.

10. Which of the following electronic components is NOT a sensor?

A. Potentiometer.

B. Strain gauge.

C. Synchronous motor.

D. Incremental optical encoder.