MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Instrumentation Transducers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A capacitance transducer uses two quartz diaphragms of area 750 mm2 separated by a distance 3.5 mm. The capacitance is 370 pF. When a pressure of 900 kN / m2 is applied, the deflection is 0.6 mm. The capacitance at this pressure would be |
| A. | 619 pF |
| B. | 447 pF |
| C. | 325 pF |
| D. | 275 pF |
| Answer» C. 325 pF | |
| 2. |
A differential capacitive sensor with a distance between the extreme plates 100 mm is shown in figure below. The difference voltage ∆V = V1 − V2, where V1 and V2 are the rms values, for a downward displacement of 10 mm of the intermediate plate from the central position, in volts, is |
| A. | 0.9 |
| B. | 1 |
| C. | 1.1 |
| D. | 2 |
| Answer» E. | |
| 3. |
Assertion (A): Capacitive transducers are, in fact, primary transducers for measurement of displacements.Reason (R): A Capacitive transducer is a non-loading, non-contact and non-invasive type transducer for displacement measurements. |
| A. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| B. | Both (A) and (R) are true, but (R) is not the correct explanation of (A) |
| C. | (A) is true, but (R) is false |
| D. | (A) is false, but (R) is true |
| Answer» C. (A) is true, but (R) is false | |
| 4. |
A capacitive transducer consists of two parallel plates of diameter 2 cm each and separated by an air gap of 0.25 mm. What is the displacement sensitivity? |
| A. | +200 pF/cm |
| B. | -300 pF/cm |
| C. | -444 pF/cm |
| D. | +44.4 pF/cm |
| Answer» D. +44.4 pF/cm | |
| 5. |
Direction: It consists of two statements, one labeled as ‘Statement (I)’ and the others as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the codes given below:Statement (I): Force and pressure can be measured by using a capacitive transducer.Statement (II): Capacitive transducer can be used to measure both static and dynamic phenomena. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» B. Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) | |
| 6. |
Match the following Lists:List-I List-II(a) LVDT(i) Displacement sensitive(b) Capacitive Type Transducer(ii) Motion transducers(c) Piezo-Electric Transducer(iii) Magnetic coupling(d) Electromechanical Type Transducer(iv) Crystalline material Correct code are:Code: |
| A. | a-iii, b-ii, c-iv, d-i |
| B. | a-iii, b-i, c-iv, d-ii |
| C. | a-ii, b-iii, c-iv, d-i |
| D. | a-ii, b-i, c-iii, d-iv |
| Answer» C. a-ii, b-iii, c-iv, d-i | |
| 7. |
CAPACITIVE_MICROPHONE_IS_AN_APPLICATION_OF_______________?$ |
| A. | Capacitive displacement transducer |
| B. | Capacitive moisture transducer |
| C. | Hygrometer |
| D. | None of the mentioned |
| Answer» B. Capacitive moisture transducer | |
| 8. |
Thermometers_are_not_possible_using_capacitive_transducer.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which of the following have high relative permittivity? |
| A. | Bakelite |
| B. | Marble |
| C. | Paraffin |
| D. | All of the mentioned |
| Answer» C. Paraffin | |
| 10. |
Which of the following quantities cannot be measured by capacitive transducers? |
| A. | Displacement |
| B. | Speed |
| C. | Moisture |
| D. | None of the mentioned |
| Answer» E. | |
| 11. |
Which of the following device is used for measuring relative humidity? |
| A. | Capacitive pressure transducer |
| B. | Hygrometer |
| C. | Capacitive strain transducer |
| D. | Capacitive moisture transducer |
| Answer» C. Capacitive strain transducer | |
| 12. |
Which of the following is correct for moisture transducers? |
| A. | Dielectric constant of pure water greater than other materials |
| B. | Dielectric constant of pure water much less than other materials |
| C. | Dielectric constant of pure water and of other materials are equal |
| D. | None of the mentioned |
| Answer» B. Dielectric constant of pure water much less than other materials | |
| 13. |
For a material capacitance increases with _____________ |
| A. | Decrease in area of plates, all other factors constant |
| B. | Increase in distance between plates, all other factors constant |
| C. | Decrease in distance between plates, all other factors constant |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
Which of the following is correct for capacitive transducer? |
| A. | Capacitive strain gauges |
| B. | Capacitive tachometers |
| C. | Capacitive pressure transducer |
| D. | All of the mentioned |
| Answer» E. | |
| 15. |
Capacitive transducers cannot be used as strain gauges. |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
Capacitive transducers can be used by_______________ |
| A. | Measuring change in distance between plates |
| B. | Measuring change in area of plates |
| C. | Change in dielectric material |
| D. | All of the mentioned |
| Answer» E. | |