In this article, we shared the pressure and instrumentation objective questions and answers for instrumentation, electrical, and electronics engineers.
Pressure and Instrumentation MCQ
The below list provides all the multiple-choice questions (MCQ) related to the pressure measurement.
Answers are available at the bottom of the article.
1. Considering the cost of instruments, which is a better choice, active or passive?
| A) | Passive instruments |
| B) | None of these answers |
| C) | Cost of both active and passive instruments are approximately same |
| D) | Active instruments |
2. Accuracy of a measuring instrument indicates the
| A) | Ratio of output value to the input value |
| B) | Degree of freedom from random errors |
| C) | Change in output with each change in input |
| D) | Closeness of the output reading to the true value |
3. For the measurement of high pressure with high accuracy the device used is
| A) | Ionization gauge |
| B) | Bourdon tubes |
| C) | Dead weight gauge |
| D) | Manganin wire pressure |
4. In light-emitting diode, the available light-emitting region is
| A) | Greater than 25 mm |
| B) | From 2.5 to 25 mm |
| C) | Greater than 50 mm |
| D) | Less than 2.5 mm |
5. The accuracy of the deflection type instruments and of the null type instruments depends on
| A) | Linearity, calibration of spring |
| B) | Linearity and calibration of spring, calibration of weights |
| C) | Calibration of spring, linearity and calibration of weights |
| D) | Both depends on calibration of weight |
6. If a pressure gauge of range 0-10 bar has a quoted inaccuracy of ±1.0 % of full-scale reading, then it means
| A) | Maximum expected error in any reading is 1 bar |
| B) | Minimum expected error in any reading is 1 bar |
| C) | Maximum expected error in any reading is 0.1 bar |
| D) | Minimum expected error in any reading is 0.1 bar |
7. Q meter is used to measure the properties of
| A) | Both Inductive coils and Capacitive coils |
| B) | Non inductive coils |
| C) | Inductive coils |
| D) | Capacitive coils |
8. The basic difference between square wave and pulse generators is their
| A) | Waveforms shape |
| B) | Cost |
| C) | Duty cycles |
| D) | Frequency range |
9. The full range of audibility in audio frequency oscillator is
| A) | 20 Hz to 20 MHz |
| B) | 0 to 20 Hz |
| C) | 20 Hz to 2 kHz |
| D) | 20 Hz to 20 kHz |
10. In a ramp type DVM, the multivibrator determines the rate at which the
| A) | Clock pulses are generated |
| B) | Measurement cycles are initiated |
| C) | Its amplitude varies |
| D) | It oscillates |
11. To increase the current sensitivity below 10 mV, an electronic instrument uses
| A) | Modulator |
| B) | Transducer |
| C) | Amplifiers |
| D) | Oscillator |
12. In the beginning, all the outputs of the successive approximation type register is at
| A) | Logic one |
| B) | None of these answers |
| C) | Toggling |
| D) | Logic zero |
13. To read and record a measurement, the indicating type instrument
| A) | Does not requires human intervention |
| B) | Always requires human intervention |
| C) | Requires human intervention only when the instrument consists of a rotating scale moving against a pointer |
| D) | Requires human intervention only when the instrument consists of a rotating pointer moving against a scale |
14. Instruments are subdivided into active and passive based on whether the output of the instrument is produced by the quantity being measured simply changes the magnitude of some external power source.
The pressure measuring device and the float-type petrol tank level indicator are example of
| A) | Former is active instrument and later is passive instrument |
| B) | Passive instruments |
| C) | Former is passive instrument and later is active instrument |
| D) | Active instruments |
15. Dead weight gauge is used for the measurement of pressure of
| A) | About 7000 bar |
| B) | About 1000 bar |
| C) | About 5000 bar |
| D) | About 2000 bar |
16. An RMS reading voltmeter can accurately measure voltages of
| A) | Sine waveforms |
| B) | Saw tooth waveforms |
| C) | Square waveforms |
| D) | All of these answers |
17. In a deadweight gauge, weights are added on the top of piston until the piston reaches a datum level.
The datum level is known as
| A) | Lowest point of the container |
| B) | None of these answers |
| C) | Highest level of fluid in the container |
| D) | Null point, where the downward force balances the fluid pressure |
18. The ionization gauge is an instrument used for the measurement of
| A) | High pressure |
| B) | Very low pressure |
| C) | Medium pressure |
| D) | Very high pressure |
19. Electronic voltmeters can be designed to measure
| A) | Only very small voltages |
| B) | Only very high voltages |
| C) | None of these answers |
| D) | Both very small and very high voltages |
20. The measurement range of the digital voltmeter is
| A) | 1V to 1MV |
| B) | 1kV to 1MV |
| C) | 100 kV to 100MV |
| D) | 1V to 1kV |
21. The microcomputer performs its computations in
| A) | Digital form |
| B) | None of these answers |
| C) | Either analogue form or digital form depending on their applications |
| D) | Analogue form |
22. In potentiometric type DVM, the adjustment of sliding contact is done by
| A) | A single phase servomotor |
| B) | Two phase servomotor |
| C) | Three phase servomotor |
| D) | All of these answers |
23. In electronic voltmeter, the range of input voltages can be extended by using
| A) | Input attenuator |
| B) | Balanced bridge dc amplifier |
| C) | Rectifier |
| D) | Functional switch |
24. In McLeod gauge,
| A) | High pressure fluid is expanded to a low pressure which is read by the monometer technique |
| B) | High pressure fluid is expanded to a low pressure which is read by the bourdon technique |
| C) | Low pressure fluid is compressed to a high pressure which is read by the bourdon technique |
| D) | Low pressure fluid is compressed to a high pressure which is read by the monometer technique |
25. The instrument used for the measurement of pressure is/are
| A) | All of these answers |
| B) | Bellows |
| C) | Diaphragms |
| D) | Fiber optic pressure sensors |
26. In the function generator, the output waveform of the integrator is
| A) | Triangular |
| B) | Sinusoidal |
| C) | Saw-tooth |
| D) | Square |
27. When the visual indication of pressure level is required then the instrument generally used is
| A) | Diaphragm sensors |
| B) | Resonant wire device |
| C) | Monometers |
| D) | Bourdon tube |
28. In liquid crystal displays, the liquid crystal exhibits properties of
| A) | Both Liquid and Solids |
| B) | Liquid |
| C) | Solids |
| D) | Gases |
29. Advantage of passive instrument is
| A) | It does not need power supply |
| B) | Sensitive |
| C) | Cheap |
| D) | Accurate |
30. In terms of usage, deflection type instruments are
| A) | More convenient than null type instrument |
| B) | Less convenient than null type instruments |
| C) | None of these answers |
| D) | Both are equally convenient |
31. The output of an analogue instrument varies
| A) | Continuously and can have an infinite number of values within its range of instruments |
| B) | In discrete steps and can have an infinite number of values within its range of instruments |
| C) | In discrete steps and can have an infinite number of values within its range of instruments |
| D) | Continuously and can have an finite number of values within its range of instruments |
32. If the displacement is measured with strain gauge then the number of strain gauge normally required are
| A) | Two |
| B) | Three |
| C) | Four |
| D) | One |
33. Depending on whether the display is numeric or alphanumeric, the segmental display is
| A) | Either 7 segmental or 14 segmental |
| B) | 21 segmental |
| C) | 7 segmental |
| D) | 14 segmental |
34. A liquid crystal display requires
| A) | None of these answers |
| B) | Both ac and dc drive |
| C) | An ac drive |
| D) | A dc drive |
35. Which among the following is not the type of digital voltmeters?
| A) | Potentiometric type |
| B) | Integrating |
| C) | None of these answers |
| D) | Ramp type |
36. A capacitive pressure sensor has a typical measurement uncertainty of
| A) | ± 0.4% |
| B) | ± 0.8% |
| C) | ± 0.2% |
| D) | ± 0.1% |
37. Bourdon tube is used for the measurement of gauge pressure of
| A) | Solid |
| B) | Both Gas and Liquid fluid |
| C) | Gas |
| D) | Liquid fluid |
38. The measurements which can be simplifies by using X-Y recorders is /are
| A) | Regulation curves of power supplies |
| B) | All of these answers |
| C) | Hysteresis curves |
| D) | Speed-torque characteristics of motors |
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