MCQOPTIONS
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MCQOPTIONS
This section includes 59 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
If X(z) =(z+z-3)/(z+z-1), then x(n) series has: |
| A. | Alternate 0s |
| B. | Alternate 1s |
| C. | Alternate 2s |
| D. | Alternate -1s |
| Answer» B. Alternate 1s | |
| 52. |
The sinusoid x(t) =6cos10πt is sampled at the rate of 15 Hz and applied to ideal rectangular LPF with cut-off frequency of 10 Hz, then the output of filter contains: |
| A. | Only 10π rad/sec component |
| B. | 10π rad/sec component |
| C. | 10π rad/sec and 20π rad/sec components |
| D. | +10π rad/sec and +20π rad/sec components |
| Answer» C. 10π rad/sec and 20π rad/sec components | |
| 53. |
Convolution is used to find: |
| A. | The impulse response of an LTI System |
| B. | Frequency response of a System |
| C. | The time response of a LTI system |
| D. | The phase response of a LTI system |
| Answer» D. The phase response of a LTI system | |
| 54. |
The characteristic equation of a control system is given by s5+s4+2s3+2s2+4s+6=0. The number of the roots of the equation which lie on the right half of s-plane: |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 55. |
The characteristic equation of a system is 2s5+s4+4s3+2s2+2s+1=0 . Which one of the following is correct? |
| A. | Stable |
| B. | Marginally stable |
| C. | Unstable |
| D. | Oscillatory |
| Answer» D. Oscillatory | |
| 56. |
The order of a linear constant-coefficient differential equation representing a system refers to the number of |
| A. | Active devices |
| B. | Elements including sources |
| C. | Passive devices |
| D. | None of the mentioned |
| Answer» E. | |
| 57. |
Assertion (A): A linear, negative feedback control system is invariable stable if its open loop configuration is stableReason (R): the negative feedback reduces the overall gain of the feedback. |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true and R is not correct Explanation of A |
| C. | A is True and R is false |
| D. | A is False and R is true |
| Answer» E. | |
| 58. |
Consider the following statements with respect to the feedback of the control systems:1. Feedback can improve stability or be harmful to stability if it is not properly applied.2. Feedback can always improve stability3. In many situations the feedback can reduce the effect of noise and disturbance on system performance.4. In general the sensitivity of the system gain of a feedback system of a parameter variation depends on where the parameter is located. |
| A. | 1,2 and 3 only |
| B. | 1,3 and 4 only |
| C. | 1,2 and 4 only |
| D. | 1,2,3 and 4 only |
| Answer» C. 1,2 and 4 only | |
| 59. |
Multiple signals as input can be used in which systems: |
| A. | Feedback systems |
| B. | Non feedback systems |
| C. | Feedforward systems |
| D. | None of the mentioned |
| Answer» B. Non feedback systems | |