MCQ in Sensors and Transducers Part 2 | ECE Board Exam

This is the Multiple Choice Questions Part 2 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 2 of the Series

⇐ MCQ in Sensors and Transducers Part 1 | ECE Board Exam

Choose the letter of the best answer in each questions.

51. Commonly used elements for wire strain gauges are __________.

A. Nickel and copper

B. nickel and gold

C. gold and brass

D. silver and aluminium

52. Proper bonding causes errors in strain gauges.

A. True

B. False

53. In Hall Effect sensor, the magnitude of the voltage generated depends on the _______.

A. Strength of the magnetic field

B. Strength of the current

C. Property of the conductor

D. All the above

54. ______ depends on the angle between the electric current and the magnetization direction

A. Anisotropic Magnetoresistance

B. Giant Magnetoresistance

C. Tunnel Magnetoresistance

D. All the above

55. Load cells are used for measuring __________

A. Large weights only

B. Small weights only

C. Weights moving in high speed

D. Slowly moving weights

56. Optical gyroscopes – operate on the principle of the ________.

A. Mutual inductance

B. Lenz law

C. Faradays law

D. Sagnac Effect

57. The change in resistance in strain gauge can be calculated by _________

A. Kelvin bridge

B. Maxwell bridge

C. Wheatstone bridge

D. Wien bridge

58. Bonded type strain gauge depends upon ________.

A. Filament construction

B. Material of the filament wire

C. Cement used to bond the filament to the carrier

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

A. Perpendicular stripes

B. Parallel stripes

C. Diagonal stripes

D. Rectangle strips

60. Load cells are primary transducers.

A. True

B. False

61. In Hall Effect, the electric field applied is perpendicular to both current and magnetic field?

A. True

B. False

62. Magneto resistive sensors based on ________ effect

A. Thomson

B. Faradays

C. Lenz

D. Tesla

63. Axis of rotation of wheel in gyroscope is called _________

A. Spin axis

B. Vertical axis

C. Horizontal axis

D. Angular axis

64. _______ are widely used in experimental stress analysis and diagnosis on machines and failure analysis.

A. Load cell

B. Strain gauge

C. Magnetoresistance

D. Gyroscope

65. In AMR the maximum sensitivity and linearity is achieved when the magnetization is at _______ with respect to the current.

A. 0 degree

B. 15 degree

C. 30 degree

D. 45 degree

66. Strain gauge foils are made up of _________

A. Copper

B. Nickel

C. Constantan alloy

D. Platinum

67. A _______ is a type of force gauge.

A. Inclinometer

B. Load cell

C. LVDT

D. Resolver

68. When the magnetic layers are aligned in the same direction, electrons originating in one layer may pass relatively ________ through the other layers

A. Freely

B. Blocked

C. rest on

D. All the above

69. Gimbals are used for __________

A. Improving rotational speed

B. Supporting gyro wheel

C. As damping agent

D. None of the mentioned

70. Gauge factor is given by which of the following relation?

A. S = ΔR/R/Δl

B. S = ΔR/Δl/l

C. S = R/Δl/l

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

A. Compass

B. Gyroscope

C. Accelerometer

D. Inclinometer

72. ________ load cells are considered in remote locations, as they do not require a power supply.

A. Hydraulic

B. Pneumatic

C. Capacitance

D. Strain gauge

73. Wheel speed sensors is the application of ________.

A. Load cell

B. Strain gauge

C. Magnetoresistance

D. Gyroscope

74. _________ Load cell are sometimes used where intrinsic safety and hygiene are desired.

A. Hydraulic

B. Pneumatic

C. Capacitance

D. Strain gauge

75. In Hall Effect sensor, an electric potential is in third direction which is ________ to the other two directions.

A. Parallel

B. Mutually Perpendicular

C. 180 degree phase shift

D. None of the above

76. A _______, is a measurement device that uses gravity to measure the inclination of an object.

A. Inclinometer

B. Strain gauge

C. Magnetoresistance

D. Gyroscope

77. In AMR the resistance produced by scattering is ________ when the magnetization direction is perpendicular to the current direction

A. Zero

B. Minimum

C. Maximum

D. infinite

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.

A. Stress

B. Strain

C. Poisson ratio

D. Young Modulus

79. Today, almost all electronic weighing scales use ________ for the measurement of weight

A. Load cell

B. Strain gauge

C. Magnetoresistance

D. Gyroscope

80. The Hall Effect sensor is not capable of measuring a current flow at a distance greater than ______ cm

A. 2

B. 4

C. 8

D. 10

81. To obtain the GMR effect, the spacer layers must be _________

A. Thick

B. Thin

C. Both A and B

D. None of the above

82. _________ load cells dominate the weighing industry.

A. Hydraulic

B. Pneumatic

C. Capacitance

D. Strain gauge

83. In Hall Effect sensor, an electric current is _______ to the direction of the magnetic flux.

A. Parallel

B. Perpendicular

C. 180 degree phase shift

D. None of the above

84. ______ Gyroscope was applied extensively in aircraft navigation.

A. Mechanical

B. MEMS

C. Ring laser

D. Fiber optic gyroscope

85. When the magnetic layers are aligned in the opposing direction, then electrons originating in one layer are ________ from the adjacent layer

A. Freely

B. Blocked

C. rest on

D. All the above

86. The Hall Effect is possessed by ________

A. Metals

B. Insulator

C. Semiconductor

D. both metals and semiconductor

87. The operating principle of all mechanical gyroscopes is based on the ________

A. Ohm law

B. conservation of angular momentum

C. Faradays law

D. Tesla principle

Topic: Motion, Proximity and Ranging Sensors

88. Sensors are used to detect the presence of any object without the need for any physical contact _______.

A. Motion sensor

B. Heading sensor

C. Proximity sensor

D. Temperature sensor

89. Identify which type of material will have high resolution?

A. Carbon composition

B. Wirewound

C. Conductive plastic

D. Thermal composition

90. Identify which type of sensor?

A. Potentiometer

B. Accelerometer

C. LVDT

D. RVDT

91. ______ Jockey /wiper materials used in potentiometric sensors

A. Chromium

B. Nickel

C. Platinum

D. Copper

92. _______ is a standard for short-range radio communications, originally developed as a cable replacement to connect portable devices

A. Radio beacon

B. Bluetooth

C. GPS

D. All the above

93. GPS satellite orbiting the earth at an altitude of about ________ above the surface of earth.

A. 19,200 Km

B. 20,200 Km

C. 21,200 Km

D. 22,200 Km

94. Ultrasonic rangers are ________.

A. Transmitter

B. Receiver

C. Transponder

D. Emitter

95. Identify which type of sensor?

A. Potentiometer

B. LIDAR

C. LVDT

D. RVDT

96. To perform the angle measurement a synchro pair is used, and they are called as ______

A. Transmitter

B. Receiver

C. Transmitter and control transformer

D. None of the above

97. LVDT is a _______.

A. Active transducer

B. Passive transducer

C. Both a) and b)

D. None of the mentioned

98. In space segments, the satellites are arranged in _____ orbits with _______satellites in each orbit.

A. 2, 4

B. 4, 4

C. 6,4

D. 8,4

99. Identify the picture and tell what type of sensor technology is used

A. Radio beacon

B. Bluetooth

C. GPS

D. All the above

100. ________ materials of the wire used in potentiometric sensors

A. Gold

B. Silver

C. Platinum

D. Copper

Complete List of MCQ in Electronics Engineering per topic