MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Consider the following statements for the pneumatic and hydraulic systems:1. The normal operating pressure of pneumatic control is very much higher than that of hydraulic control.2. In, pneumatic control external leakage is permissible to a certain extent, but there should no leakage in a hydraulic control.Which of the statements given above is/are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 and 2 |
| Answer» D. Neither 1 and 2 | |
| 2. |
In case of DC servomotor the back-emf is equivalent to an “electric friction” which tends to : |
| A. | Improve stability of the motor |
| B. | Slowly decrease stability of the motor |
| C. | Vary rapidly decrease stability of the motor |
| D. | Have no effect on stability |
| Answer» B. Slowly decrease stability of the motor | |
| 3. |
Assertion (A): In the error detector configuration using a synchro transmitter and synchro control transformer, the latter is connected to the error amplifier.Reason (R): Synchro control transformer has almost a uniform reluctance path between the rotor and the stator. |
| 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» D. A is False and R is true | |
| 4. |
Assertion (A): In a shunt regulator, the control element is connected in shunt with the load to achieve constant output voltage.Reason (R): The impedance of the control element varies to keep the total current flowing through the load and the control element constant. |
| 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» D. A is False and R is true | |
| 5. |
Assertion (A): The stator winding of a control transformer has higher impedance per phaseReason (R): The rotor of control transformer is cylindrical in shape. |
| 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» C. A is True and R is false | |
| 6. |
Consider the following servomotors:1. AC-two phase servomotor2. DC servomotor3. Hydraulic servomotor4. Pneumatic servomotorThe correct sequence of these servomotor in increasing order of power handling capacity is: |
| A. | 2,4,3,1 |
| B. | 4,2,3,1 |
| C. | 2,4,1,3 |
| D. | 4,2,1,3 |
| Answer» D. 4,2,1,3 | |
| 7. |
The_transfer_function_of_a_LTI_system_is_given_as_1/(s+1)._What_is_the_steady-state_value_of_the_unit-impulse_response?$ |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | Infinite |
| Answer» B. 1 | |
| 8. |
In case of DC servomotor the back-emf is equivalent to an “electric friction” which tends to ?# |
| A. | Improve stability of the motor |
| B. | Slowly decrease stability of the motor |
| C. | Vary rapidly decrease stability of the motor |
| D. | Have no effect on stability |
| Answer» B. Slowly decrease stability of the motor | |
| 9. |
If the initial conditions are inherently zero, what does it physically mean? |
| A. | The system is at rest but stores energy |
| B. | The system is working but does not store energy |
| C. | The system is at rests or no energy is stored in any of its parts |
| D. | The system is working with zero reference input |
| Answer» D. The system is working with zero reference input | |
| 10. |
A tachometer is used as an inner loop in a position control servo-system. What is the effect of feedback on the gain of the sub-loop incorporating tachometer and in the effective time constant of the system? |
| A. | Both are reduced |
| B. | Gain is reduced but the time constant is increased |
| C. | Gain is increased but the time constant is reduced |
| D. | Both are increased |
| Answer» B. Gain is reduced but the time constant is increased | |
| 11. |
Assertion (A): In the error detector configuration using a synchro transmitter and synchro control transformer, the latter is connected to the error amplifier. |
| A. | : Synchro control transformer has almost a uniform reluctance path between the rotor and the stator. |
| B. | Both A and R are true and R is correct explanation of A |
| C. | Both A and R are true and R is not correct Explanation of A |
| D. | A is True and R is false |
| Answer» D. A is True and R is false | |
| 12. |
Assertion (A): In a shunt regulator, the control element is connected in shunt with the load to achieve constant output voltage. |
| A. | : The impedance of the control element varies to keep the total current flowing through the load and the control element constant. |
| B. | Both A and R are true and R is correct explanation of A |
| C. | Both A and R are true and R is not correct Explanation of A |
| D. | A is True and R is false |
| Answer» D. A is True and R is false | |
| 13. |
Assertion (A): The stator winding of a control transformer has higher impedance per phase |
| A. | : The rotor of control transformer is cylindrical in shape. |
| B. | Both A and R are true and R is correct explanation of A |
| C. | Both A and R are true and R is not correct Explanation of A |
| D. | A is True and R is false |
| Answer» C. Both A and R are true and R is not correct Explanation of A | |
| 14. |
Open loop transfer function of a system having one zero with a positive real value is called. |
| A. | Zero phase function |
| B. | Negative phase function |
| C. | Positive phase function |
| D. | Non-minimum phase function |
| Answer» E. | |