Introduction to Control Systems – Exercise – 1

1. As compared to a closed-loop system, an open-loop system is :

(a) more stable as well as more accurate
(b) less stable as well as less accurate
(c) more stable but less accurate
(d) less stable but more accurate

Answer
Answer : (c)
Explanation
No answer description available for this question. Let us discuss.

2. Which of the following are the characteristics of closed-loop systems ?
1. it does not compensate for disturbances.
2. it reduces the sensitivity of plant-parameter variations.
3. it does not involve output measurements.
4. it has the ability to control the system transient response.
Select the correct answer using the codes given below :

(a) 1 and 4
(b) 2 and 4
(c) 1 and 3
(d) 2 and 3

Answer
Answer : (b)
Explanation
No answer description available for this question. Let us discuss.

3. When a human being tries to approach an object, his brain acts as :

(a) an error measuring device
(b) a controller
(c) an actuator
(d) an amplifier

Answer
Answer : (b)
Explanation
No answer description available for this question. Let us discuss.

4. Which one of the following is an example of open-loop system ?

(a) a windscreen wiper
(b) aqualung
(c) respiratory system of an animal
(d) a system for controlling Anti-rocket-missiles

Answer
Answer : (a)
Explanation
No answer description available for this question. Let us discuss.

5. Which of the following is not a desirable feature of a modem control system :

(a) quick response
(b) accuracy
(c) correct power level
(d) no oscillation

Answer
Answer : (d)
Explanation
No answer description available for this question. Let us discuss.
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