1. Strain gauge is an example of _ _ _ _ _ sensors
Correct : A. Modulating sensor
2. Sensor is a type of transducer.
Correct : A. True
3. Based upon what parameters sensors will be chosen_ _ _ _ _
Correct : 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
Correct : D. Linearity
5. Average value of the readings is _ _ _ _ _
Correct : A. Mean
6. Change in output of sensor with change in input is
Correct : C. Sensitivity
7. Smallest change which a sensor can detect is ____________
Correct : A. Resolution
8. Which of the following error is caused by a reversal of measured property?
Correct : A. Hysterisis
9. ___________, describing the performance with respect to very slow changes.
Correct : A. Static characteristics
10. Unpredictable error _ _ _ _ __
Correct : A. Random error
11. What is the term used to express the ability of a measuring system to maintain its
standard performance?
Correct : B. Stability
12. _ _ _ _ _ _ is also used to indicate the most probable value of the measured
quantity when a set of readings are taken.
Correct : B. Median
13. A system will be error free if we remove all systematic error’.
Correct : B. False
14. Thermocouple is an example of _ _ _ _ _ _ sensor
Correct : B. Direct sensor
15. Which of the following error is caused by poor calibration of the instrument?
Correct : C. Systematic error
16. _ _ _ _ _ _ is a popular technique for transmitting digital data in embedded
systems.
Correct : B. PWM
17. How systematic errors are eliminated?
Correct : B. Replacement of instrument
18. ‘Zero error is an indication of instrumental error’.
Correct : A. True
19. Which transducer is known as ‘self-generating transducer’?
Correct : A. Active transducer
20. Sensors that use an additional energy source for their operation are called _ _ _ _
_
Correct : D. Both a) and b)
21. _ _ _ _ _ _can be defined as the tolerance within which a measurement can be
repeated
Correct : C. Precision
22. Why do we need to calibrate sensors?
Correct : A. Environmental factors
23. _ _ _ _ _ _ is the departure of a given reading from the arithmetic mean of a
group of readings.
Correct : D. deviation
24. _ _ _ _ __ _, describing the sensor’s life expectancy
Correct : D. Reliability Characteristics
25. Sensors Output signal types
Correct : D. All the above
26. In a measuring system quantity under measurement is termed as
________________
Correct : A. Measurand
27. _ _ _ _ _ is the complicated output signal types
Correct : C. Serial digital
28. Which of the following is not a characteristic of an ideal transducer?
Correct : B. Low linearity
29. _ _ _ _ _ _ _ signals are much more susceptible to noise
Correct : A. Analog signal
30. _ _ _ _ _ _ is the closeness to true value
Correct : B. Accuracy
31. The simplest model for a measurement system is a _ _ _ _ order differential
equation
Correct : A. Zero
32. Probable error is due to _ _ _ _ _ _.
Correct : C. Random error
33. _ _ _ _ _ is the value which occurs most frequently in a set of observations and
around which other items of the set cluster densely
Correct : C. Mode
34. _ _ _ _ _ __ parameters on which sensor classified?
Correct : D. All the above
35. In a measuring system what is the term used to specify a difference between
higher and lower calibration values?
Correct : B. Span
36. Which of the following represent active transducer?
Correct : D. Thermocouple
37. Capacitive transducer is used for?
Correct : B. Dynamic measurement
38. The mercury in glass thermometer is an example of a _ _ _ _ _ _ order
instrument
Correct : B. First
39. _ _ __ _Senses the physical changes occur in the surrounding and converting it
into a readable quantity.
Correct : D. Sensor
40. A _ _ _ _ means that the sensor output is higher or lower than the ideal output.
Correct : A. Offset
41. The _ _ _ _ _characteristics of a transducer refer to the performance of the
transducer when it is subjected to time varying signal.
Correct : B. Dynamic
42. A common example of a _ _ _ _ _ _ _ is to calibrate a temperature sensor using
an ice-water bath and boiling water for the two references.
Correct : B. Two point calibration
43. ___________, relating the sensor performance after or during exposure to
specified external conditions (e.g. pressure, temperature, vibration and radiation).
Correct : C. Environmental characteristics
44. A _ _ _ _ __ much more immune to noise than an analog signal
Correct : B. PWM
45. Sensor and signal conditioning jointly referred as __ _ __
Correct : A. Transducer
46. The most common techniques for noise reduction are differential signal
transmission and passive low pass _ _ _ _
Correct : A. Filtration
47. Which of the following is caused by careless handling?
Correct : B. Gross error
48. Bonding element in a strain gauge must have __________
Correct : C. high insulation resistance
49. In AMR the resistance produced by scattering is_ _ _ _ __ when the magnetization direction is parallel to the current direction
Correct : C. Maximum
50. The below picture is an application of _ _ _ _
Correct : B. Load cell
51. Commonly used elements for wire strain gauges are __________
Correct : A. Nickel and copper
52. Proper bonding causes errors in strain gauges.
Correct : B. False
53. In Hall Effect sensor, the magnitude of the voltage generated depends on the _ _ _ _ _.
Correct : D. All the above
54. _ _ _ _ _ depends on the angle between the electric current and the
magnetization direction
Correct : A. Anisotropic Magnetoresistance
55. Load cells are used for measuring _______________
Correct : D. Slowly moving weights
56. Optical gyroscopes - operate on the principle of the _ _ _ _ _
Correct : D. Sagnac Effect
57. The change in resistance in strain gauge can be calculated by _____________
Correct : C. Wheatstone bridge
58. Bonded type strain gauge depends upon____
Correct : D. All the above
59. In AMR the 45º alignment is commonly achieved by patterning _ _ _ _ _of highly conductive metal onto the more resistive AMR material
Correct : C. Diagonal stripes
60. Load cells are primary transducers.
Correct : A. True
61. In Hall Effect, the electric field applied is perpendicular to both current and
magnetic field?
Correct : A. True
62. Magneto resistive sensors based on __ _ _ _ _ effect
Correct : A. Thomson
63. Axis of rotation of wheel in gyroscope is called ____________
Correct : A. Spin axis
64. _ _ _ _ _ _ are widely used in experimental stress analysis and diagnosis on
machines and failure analysis.
Correct : B. Strain gauge
65. In AMR the maximum sensitivity and linearity is achieved when the
magnetization is at _ _ _ with respect to the current.
Correct : D. 45degree
66. Strain gauge foils are made up of _________
Correct : C. Constantan alloy
67. A _ _ _ _ is a type of force gauge.
Correct : B. Load cell
68. When the magnetic layers are aligned in the same direction, electrons originating
in one layer may pass relatively _ _ _ _ _ through the other layers
Correct : A. Freely
69. Gimbals are used for _____________
Correct : B. Supporting gyro wheel
70. Gauge factor is given by which of the following relation?
Correct : D. S = ΔR/R/Δl/l
71. A _ _ _ _ _ is an instrument used for navigation and orientation that shows
direction relative to the geographic cardinal directions
Correct : A. Compass
72. ________ load cells are considered in remote locations, as they do not require a
power supply.
Correct : A. Hydraulic
73. Wheel speed sensors is the application of _ _ _ _ _ _ _
Correct : C. Magentoresistance
74. _________ Load cell are sometimes used where intrinsic safety and hygiene are
desired.
Correct : B. Pneumatic
75. In Hall Effect sensor, an electric potential is in third direction which is ________
to the other two directions.
Correct : B. Mutually Perpendicular
76. A _ _ _ _ _ _, is a measurement device that uses gravity to measure the
inclination of an object.
Correct : A. Inclinometer
77. In AMR the resistance produced by scattering is_ _ _ _ __ when the
magnetization direction is perpendicular to the current direction
Correct : B. Minimum
78. The _ _ __ in an element is a ratio of change in length in the direction of applied load to the original length of an element.
Correct : B. Strain
79. Today, almost all electronic weighing scales use ________ for the measurement
of weight
Correct : A. Load cell
80. The Hall Effect sensor is not capable of measuring a current flow at a distance
greater than _ _ _cm
Correct : D. 10
81. To obtain the GMR effect, the spacer layers must be ____________
Correct : B. Thin
82. __________ load cells dominate the weighing industry.
Correct : D. Strain gauge
83. In Hall Effect sensor, an electric current is _______ to the direction of the
magnetic flux.
Correct : B. Perpendicular
84. ______ Gyroscope was applied extensively in aircraft navigation.
Correct : C. Ring laser
85. When the magnetic layers are aligned in the opposing direction, then electrons
originating in one layer are __________ from the adjacent layer
Correct : B. Blocked
86. The Hall Effect is possessed by ________
Correct : D. both metals and semiconductor
87. The operating principle of all mechanical gyroscopes is based on the ________
Correct : B. conservation of angular momentum
88. Sensors are used to detect the presence of any object without the need for any
physical contact _ _ _ _ _ _
Correct : C. Proximity sensor
89. Identify which type of material will have high resolution?
Correct : C. Conductive plastic
90. Identify which type sensor?
Correct : B. Accelerometer
91. _ _ _ _ _ Jockey /wiper materials used in potentiometric sensors
Correct : C. Platinum
92. _ _ _ _ _ _ _ is a standard for short-range radio communications, originally
developed as a cable replacement to connect portable devices
Correct : B. Bluetooth
93. GPS satellite orbiting the earth at an altitude of about _ _ _ _ _ above the surface
of earth.
Correct : B. 20,200 Km
94. Ultrasonic rangers are_ _ _ _ _ _ _ _ _
Correct : C. Transponder
95. Identify which type sensor?
Correct : C. LVDT
96. To perform the angle measurement a synchro pair is used and they are called as
_ _ _ _
Correct : C. Transmitter and control transformer
97. LVDT is a _ _ _ _ _
Correct : B. Passive transducer
98. In space segments, the satellites are arranged in _ _ _ orbits with _ _ _satellites in
each orbit.
Correct : C. 6,4
99. Identify the picture and tell what type of sensor technology is used
Correct : B. Bluetooth
100. _ _ _ _ _ materials of the wire used in potentiometric sensors