Quiznetik

Sensors and Transducers | Set 2

1. Synchro is a rotating device that operates on the same principle as a _ _ _ _ _ _ and produces a set of voltages, correlated to angular position.

Correct : A. Transformer principle

2. What is the principle of operation of LVDT?

Correct : A. Mutual inductance

3. In GPS, Control segment consists of a master control station and _ _ _ _ other monitor stations.

Correct : B. 4

4. Potentiometer is a _ _ _ _ _

Correct : B. Passive transducer

5. _ _ _ _ _ is an analog position sensor that is absolute over a single turn.

Correct : B. Resolver

6. Each satellite takes _ _ _ _ _in completing one full orbit and repeats the same ground track each day.

Correct : B. 12 hour

7. Bluetooth Network consists of a Personal Area Network which contains a minimum of ___to maximum of ___ Bluetooth peer devices.

Correct : C. 2,8

8. LiDAR stands for _ _ _ _ _ _ _ _

Correct : B. Light detection and Ranging

9. In optical encoder, the inner track has just one hole which is used locate the ‘_ _ _ _of the disc.

Correct : B. Home position

10. The GPS satellite comprises of sun seeking _ _ _ _ having _ _ _ _ providing secondary power.

Correct : B. Solar panels and Ni Cad batteries

11. Forklift uses _ _ _ _ _ _ sensor

Correct : A. Potentiometer

12. An _ _ _ _ _ _ is an electromechanical device used to measure acceleration forces such as static or dynamic

Correct : B. Resolver

13. How many satellites are used to gather the exact location using GPS?

Correct : D. 4

14. _ _ _ _ _used where rotational or angular displacements are to be measured

Correct : B. RVDT

15. Applications of Lidar _ _ _ _ _

Correct : D. All the above

16. The required and nominal range of Bluetooth device is _ _ _ __

Correct : A. 10

17. _ _ _ _ _ sensors are not affected by ambient conditions, such as dust, humidity, and vibrations and are insensitive to some ambient conditions based on the principle that these sensors display a constant flow of electrical current, making their characteristics constant over time.

Correct : C. Hall effect

18. The space segment consists of_ _ _ _ _ satellites nominally orbiting the earth in MEO (Medium Earth Orbit).

Correct : D. 24

19. Optical encoders are used to measure _ _ _ _ _

Correct : C. Both angular and linear positions

20. The __ ____ ____ is a space-based satellite navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth

Correct : C. GPS

21. _ _ _ _ _ _elements offer excellent temperature stability and high power dissipation abilities.

Correct : A. Wire wound

22. The output voltage is measured which is proportional to the distance travelled by the _ _ _ _ _

Correct : A. Wiper/Jockey

23. By using Rotating Polygon as scanner in Lidar what type of ground pattern it will form ______

Correct : C. Parallel

24. The distance sensing method of radio beacon range from _ _ _ _ _

Correct : A. 1M to 100 M

25. Laser is used in LIDAR for what purpose?

Correct : B. Range finder

26. A ________ is thermally sensitive resistor that exhibits a large change in resistance.

Correct : A. Thermistor

27. ________ measures temperature by correlating the resistance of the RTD with temperature.

Correct : B. Resistance Thermometer

28. ________ consists of two different metals connected at two points.

Correct : C. Thermocouple

29. Which type of temperature sensor is placed in Integrated Circuits?

Correct : D. Semiconductor based sensor

30. Which sensor is linear and low accuracy?

Correct : D. Semiconductor based sensor

31. Piezoelectric transducer is used for measuring __________

Correct : A. non-electrical quantities

32. Piezoelectricity means _________________

Correct : C. Pressure electricity

33. What is the full form of LASER?

Correct : C. Light Amplification by Stimulated Emission of Radiations

34. In Stimulated Absorption, what is the lifetime of atoms ground state?

Correct : D. Infinity

35. Which characteristic of LASER allows it to be used in holography?

Correct : A. Coherency

36. Which of the following can be used for the generation of laser pulse?

Correct : D. Nd- YAG laser

37. Point out the wrong statement.

Correct : B. MEMS as a class can be between 1000 and 100000 micrometers in size

38. Which of the following is not a configuration of a smart sensor?

Correct : D. None of the mentioned

39. Input signal to smart sensor is fed from _____________

Correct : B. Transducer

40. Signal conditioning is carried out in ______________

Correct : A. Transducer housing

41. Output of smart sensors will of ________________

Correct : B. Digital

42. Which of the following defines smartness of sensor?

Correct : A. Quality of data

43. Input data of smart sensor will be _____________

Correct : A. Analog

44. LDR’s are also called _______________

Correct : B. Photo resistive cell

45. Which of the following is not correct for fibre optic sensors?

Correct : D. None of the mentioned

46. Epoxy material in fibre optics is intended for ________________

Correct : C. Better sealing

47. Optical fiber sensors are electrically ____________

Correct : B. passive

48. Optical fibers are not immune to ________

Correct : C. ambient light interference

49. In which of the following optic fiber sensor the fiber is simply used to carry light to and from an external optical device where the sensing takes place?

Correct : A. extrinsic fiber optic sensor

50. Other name for tactile sensor is______________

Correct : C. Touch sensor

51. Which sensor is used in mobile phones?

Correct : A. Capacitive touch sensor

52. The nano particles from iron and palladium are used to produce ________

Correct : D. Magnetic storage devices

53. Nano particles target the rare _______ causing cells and remove them from blood.

Correct : A. Tumour

54. ___________ is the field in which the nano particles are used with silica coated iron oxide iron oxide.

Correct : C. Medical diagnosis

55. In which of the following categories be thin plate diaphragm included?

Correct : A. Primary transducer

56. Which of the following applications are suited for thin plate diaphragms?

Correct : D. Both static and dynamic pressure with small frequency

57. Which of the following devices convert pressure to displacement?

Correct : D. Both diaphragm and capsule

58. Resistance temperature detector is ___________

Correct : A. a electrical tranducer

59. Relation between temperature and resistance of a conductor is ________

Correct : B. Rt = Rref [1+α∆t]

60. Sensing element in the thermometer must provide ________

Correct : C. large change in resistance

61. Resistive transducers are ______________

Correct : C. Either primary or secondary

62. Which of the following can be used to measure using thermistors?

Correct : B. In-between 100Ω and 1MΩ

63. Which of the following is correct for thermistors?

Correct : B. Negative temperature coefficient of resistance

64. Thermocouple is a ______________

Correct : A. Primary device

65. Operation of thermocouple is governed by _______________

Correct : D. All of the mentioned

66. ______________ describes current flow between two junctions formed by two different metals.

Correct : A. Peltier effect

67. Amount of heat liberated or absorbed when 1A current passes is called ____________

Correct : B. Peltier coefficient

68. Thermo couple cannot be used to measure ____________

Correct : D. None of the mentioned

69. Photoconductive transducers produce output ________

Correct : C. due to change in resistance

70. Which of the following is correct for a level to force conversions?

Correct : A. Liquid at constant density distribution

71. Which devices measures gases or liquid?

Correct : B. Pressure sensor

72. Diaphragms in a pressure sensor are of ________

Correct : A. 2 types

73. Thermocouples consist of a pair of wires made of dissimilar metals joined together at one or more junctions that generate a voltage when subjected to a temperature gradient . This phenomenon is known as the _________

Correct : A. Seebeck effect

74. What is the name of the question mark area?

Correct : A. Measuring junction

75. Signal conditioner is used for _________

Correct : D. boosting the voltage

76. A multiplexer is used for _________

Correct : A. accepting multiple inputs

77. The time required to complete the conversion of Analog to Digital is ________ the duration of the hold mode of S/H.

Correct : C. Less than

78. In A/D converter, what is the time relation between sampling period T and the duration of the sample mode and the hold mode?

Correct : A. Should be larger than the duration of sample mode and hold mode

79. During which period the op-amps output of sample and hold circuits is processed?

Correct : D. Hold period

80. Sample and hold circuit are used in

Correct : D. All of the mentioned

81. The opamp in the Inverting circuit is in __________

Correct : A. Linear region

82. In an Inverting Amplifier circuit, the output voltage vo is expressed as a function of ____________

Correct : C. Source voltage

83. In the non-inverting configuration of operational amplifier

Correct : C. The positive terminal is connected to the power source

84. For ideal non-inverting operational amplifier

Correct : B. Input resistance is infinite and output resistance is zero

85. Which is the best example of a single channel data acquisition system?

Correct : D. DPM

86. Which technique is most widely used in the single channel data acquisition system?

Correct : C. Successive approximation

87. Multichannel data acquisition system has __________

Correct : A. multiple channels

88. Multichannel Analog Multiplexed System is __________

Correct : C. slow

89. Multichannel Analog Multiplexed System utilises time __________

Correct : D. using a mux

90. In a Multichannel Analog Multiplexed System __________

Correct : A. A/D converter is used

91. Many channels can be monitored at the same time by __________

Correct : C. Multiplexing

92. What is the region after the stop band frequency in the magnitude frequency response of a low pass filter?

Correct : A. Stop band

93. Which of the following is not correct for data loggers?

Correct : B. Battery less

94. Which of the following devices are similar to electronic data loggers?

Correct : A. Chart recorders

95. Which of the following statement is false?

Correct : B. All data acquisition systems are data loggers

96. Data logger system have _______________

Correct : A. Slow sampling rate

97. Which of the following is correct for data loggers?

Correct : D. All of the mentioned

98. Data logger deals with __________________

Correct : A. Digital signals

99. What is a multiplexer?

Correct : B. A multiplexer is a device which converts many signals into one

100. How many control lines are present in analog to digital converter in addition to reference voltage?

Correct : B. Two