MCQ in Sensors and Transducers Part 1 | ECE Board Exam

This is the Multiple Choice Questions Part 1 of the Series in Sensors and Transducers as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

MCQ Topic Outline

• MCQ in Introduction to Sensors and Transducers
• MCQ in Force, magnetic and Heading Sensors
• MCQ in Optical, Pressure and Temperature Sensors
• MCQ in Motion, Proximity and Ranging Sensors
• MCQ in Signal Conditioning and DAQ Systems

Start Practice Exam Test Questions Part 1 of the Series

Choose the letter of the best answer in each questions.

1. Strain gauge is an example of ________ sensors

A. Modulating sensor

B. Direct sensor

C. Self generating sensors

D. None of the above

2. Sensor is a type of transducer.

A. True

B. False

3. Based upon what parameters sensors will be chosen ________.

A. Environmental factors

B. Economic factor

C. Static characteristics

D. All the above

4. ________ can be defined as the variation in the constant of proportionality between the input physical quantity and the output electrical signal

A. Resolution

B. Accuracy

C. Precision

D. Linearity

5. Average value of the readings is ________.

A. Mean

B. Median

C. Mode

D. deviation

6. Change in output of sensor with change in input is

A. Threshold

B. Slew rate

C. Sensitivity

D. None of the mentioned

7. Smallest change which a sensor can detect is __________.

A. Resolution

B. Accuracy

C. Precision

D. Scale

8. Which of the following error is caused by a reversal of measured property?

A. Hysterisis

B. Noise

C. Digitization error

D. Quantization error

9. _______, describing the performance with respect to very slow changes.

A. Static characteristics

B. Dynamic characteristics

C. Environmental characteristics

D. Reliability Characteristics

10. Unpredictable error _______.

A. Random error

B. Gross error

C. Systematic error

D. Precision error

11. What is the term used to express the ability of a measuring system to maintain its standard performance?

A. Zero stability

B. Stability

C. Sensitivity

D. Linearity

12. _______ is also used to indicate the most probable value of the measured quantity when a set of readings are taken.

A. Mean

B. Median

C. Mode

D. deviation

13. A system will be error free if we remove all systematic error.

A. True

B. False

14. Thermocouple is an example of ______ sensor

A. Modulating sensor

B. Direct sensor

C. Interrogating sensors

D. None of the above

15. Which of the following error is caused by poor calibration of the instrument?

A. Random error

B. Gross error

C. Systematic error

D. Precision error

16. _______ is a popular technique for transmitting digital data in embedded systems.

A. Analog voltage

B. PWM

C. Serial digital

D. All the above

17. How systematic errors are eliminated?

A. Frequent measurement

B. Replacement of instrument

C. Finding mean of reading

D. Finding variance of reading

18. ‘Zero error is an indication of instrumental error’.

A. True

B. False

19. Which transducer is known as ‘self-generating transducer’?

A. Active transducer

B. Passive transducer

C. Secondary transducer

D. Analog transducer

20. Sensors that use an additional energy source for their operation are called _______.

A. modulating sensors

B. Interrogating sensors

C. Direct sensors

D. Both A and B

21. _______ can be defined as the tolerance within which a measurement can be repeated.

A. Resolution

B. Accuracy

C. Precision

D. Scale

22. Why do we need to calibrate sensors?

A. Environmental factors

B. Aging of the components

C. Cost

D. All the above

23. _______ is the departure of a given reading from the arithmetic mean of a group of readings.

A. Mean

B. Median

C. Mode

D. deviation

24. _______, describing the sensor’s life expectancy

A. Static characteristics

B. Dynamic characteristics

C. Environmental characteristics

D. Reliability Characteristics

25. Sensors Output signal types

A. Analog voltage

B. PWM

C. Serial digital

D. All the above

26. In a measuring system quantity under measurement is termed as _________.

A. Measurand

B. Controllers

C. Sensors

D. Indicators

27. _______ is the complicated output signal types

A. Analog voltage

B. PWM

C. Serial digital

D. All the above

28. Which of the following is not a characteristic of an ideal transducer?

A. High dynamic range

B. Low linearity

C. High repeatability

D. Low noise

29. ________ signals are much more susceptible to noise

A. Analog signal

B. Digital signal

C. Both Analog and Digital signal

D. None of the above

30. ________ is the closeness to true value

A. Zero stability

B. Accuracy

C. Sensitivity

D. Linearity

31. The simplest model for a measurement system is a ________ order differential equation.

A. Zero

B. First

C. Second

D. Third

32. Probable error is due to _______.

A. Systematic error

B. Gross error

C. Random error

D. None of the mentioned

33. ________ is the value which occurs most frequently in a set of observations and around which other items of the set cluster densely

A. Mean

B. Median

C. Mode

D. Variance

34. ________ parameters on which sensor classified?

A. Material and technology

B. Application

C. Property and input quantity

D. All the above

35. In a measuring system what is the term used to specify a difference between higher and lower calibration values?

A. Range

B. Span

C. Drift

D. Threshold

36. Which of the following represent active transducer?

A. Strain gauge

B. Thermistor

C. LVDT

D. Thermocouple

37. Capacitive transducer is used for?

A. Static measurement

B. Dynamic measurement

C. Transient measurement

D. Both static and dynamic

38. The mercury in glass thermometer is an example of a ________ order instrument

A. Zero

B. First

C. Second

D. Third

39. _______ Senses the physical changes occur in the surrounding and converting it into a readable quantity.

A. Transducer

B. Actuator

C. Relay

D. Sensor

40. A _______ means that the sensor output is higher or lower than the ideal output.

A. Offset

B. Sensitivity

C. Linearity

D. Resolution

41. The ______ characteristics of a transducer refer to the performance of the transducer when it is subjected to time varying signal.

A. Static

B. Dynamic

C. Transient

D. Both A and B

42. A common example of a _______ is to calibrate a temperature sensor using an ice-water bath and boiling water for the two references.

A. One point calibration

B. Two point calibration

C. Three point calibration

D. Both A and B

43. ________, relating the sensor performance after or during exposure to specified external conditions (e.g. pressure, temperature, vibration and radiation).

A. Static characteristics

B. Dynamic characteristics

C. Environmental characteristics

D. Reliability Characteristics

44. A _______ much more immune to noise than an analog signal.

A. Analog voltage

B. PWM

C. Serial digital

D. All the above

45. Sensor and signal conditioning jointly referred as _______.

A. Transducer

B. Actuator

C. Relay

D. All the above

46. The most common techniques for noise reduction are differential signal transmission and passive low pass _______.

A. Filtration

B. Amplifier

C. Relay

D. All the above

47. Which of the following is caused by careless handling?

A. Systematic error

B. Gross error

C. Random error

D. None of the mentioned

Topic: Force, Magnetic and Heading Sensors

48. Bonding element in a strain gauge must have __________

A. zero insulation resistance

B. low insulation resistance

C. high insulation resistance

D. infinite insulation resistance

49. In AMR the resistance produced by scattering is _______ when the magnetization direction is parallel to the current direction

A. Zero

B. Minimum

C. Maximum

D. infinite

50. The below picture is an application of ________.

A. Radio beacon

B. Load cell

C. magnetoresistance

D. MEMS sensor

Complete List of MCQ in Electronics Engineering per topic