MCQ in Sensors and Transducers Part 3 | ECE Board Exam

This is the Multiple Choice Questions Part 3 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 3 of the Series

⇐ MCQ in Sensors and Transducers Part 2 | ECE Board Exam

Choose the letter of the best answer in each questions.

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

A. Transformer principle

B. Faradays principle

C. Lens law

D. Tesla principle

102. What is the principle of operation of LVDT?

A. Mutual inductance

B. Self-inductance

C. Permanence

D. Reluctance

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

A. 2

B. 4

C. 6

D. 8

104. Potentiometer is a ________.

A. Active transducer

B. Passive transducer

C. Both a) and b)

D. None of the mentioned

105. ________ is an analog position sensor that is absolute over a single turn.

A. Synchros

B. Resolver

C. LVDT

D. Microsyn

106. Each satellite takes ________ in completing one full orbit and repeats the same ground track each day.

A. 2 hour

B. 12 hour

C. 22 hour

D. 24 hour

107. Bluetooth Network consists of a Personal Area Network which contains a minimum of ______ to maximum of _____ Bluetooth peer devices.

A. 2 ,4

B. 2,6

C. 2,8

D. 2,10

108. LiDAR stands for _________.

A. Light detection and Resonance

B. Light detection and Ranging

C. LED detection and Ranging

D. Line distance and Ranging

109. In optical encoder, the inner track has just one hole which is used locate the _______ of the disc.

A. Anti Clockwise direction of the rotation

B. Home position

C. Clockwise direction of the rotation

D. Both A and C

110. The GPS satellite comprises of sun seeking ______ having ______ providing secondary power.

A. Solar panels and Wind energy

B. Solar panels and Ni Cad batteries

C. Lead batteries and Ni Cad Batteries

D. Solar panels and Lead batteries

111. Forklift uses ________ sensor

A. Potentiometer

B. Encoder

C. Synchros

D. Resolver

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

A. Synchros

B. Resolver

C. LVDT

D. Microsyn

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

A. 1

B. 2

C. 3

D. 4

114. ________ used where rotational or angular displacements are to be measured

A. LVDT

B. RVDT

C. Hall effect

D. Load cell

115. Applications of Lidar _______.

A. Oceanography

B. Agriculture

C. Terrain model

D. All the above

116. The required and nominal range of Bluetooth device is _______.

A. 10

B. 14

C. 20

D. 24

117. _______ 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.

A. LVDT

B. RVDT

C. Hall effect

D. Load cell

118. The space segment consists of ______ satellites nominally orbiting the earth in MEO (Medium Earth Orbit).

A. 10

B. 14

C. 20

D. 24

119. Optical encoders are used to measure ________.

A. Angular positions

B. Linear positions

C. Both angular and linear positions

D. None of the above

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

A. Radio beacon

B. Gyroscope

C. GPS

D. Accelerometer

121. _______ elements offer excellent temperature stability and high power dissipation abilities.

A. Wire wound

B. Conductive plastic

C. Hybrid

D. None of the above

122. The output voltage is measured which is proportional to the distance travelled by the _________.

A. Wiper/Jockey

B. Conductive plastic

C. Hybrid

D. None of the above

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

A. Z shaped

B. Sinusoidal

C. Parallel

D. Elliptical

124. The distance sensing method of radio beacon range from ________.

A. 1 M to 100 M

B. 2 M to 200 M

C. 2 Cm to 200 Cm

D. 1 Cm to 100 Cm

Topic:  Optical, Pressure and Temperature Sensors

125. Laser is used in LIDAR for what purpose?

A. High-Speed Photography

B. Range finder

C. Optical Carrier signal

D. Drilling

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

A. Thermistor

B. Resistance Thermometer

C. Thermo couple

D. Semiconductor based sensor

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

A. Thermistor

B. Resistance Thermometer

C. Thermo couple

D. Semiconductor based sensor

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

A. Thermistor

B. Resistance Thermometer

C. Thermocouple

D. Semiconductor based sensor

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

A. Thermistor

B. Resistance Thermometer

C. Thermocouple

D. Semiconductor based sensor

130. Which sensor is linear and low accuracy?

A. Thermistor

B. Resistance Thermometer

C. Thermocouple

D. Semiconductor based sensor

131. Piezoelectric transducer is used for measuring ________

A. non-electrical quantities

B. electrical quantities

C. chemical quantities

D. any quantity

132. Piezoelectricity means ___________

A. Electric polarization

B. Electric dielectric

C. Pressure electricity

D. Polar dielectric

133. What is the full form of LASER?

A. Light Absorbent and Stimulated Emission of Radiations

B. Light Absorbing Solar Energy Resource

C. Light Amplification by Stimulated Emission of Radiations

D. Light Amplification of Singular Emission of Radiations

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

A. 1 second

B. 1 minute

C. 1 hour

D. Infinity

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

A. Coherency

B. Directionality

C. Intensity

D. Monochromaticity

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

A. Ruby laser

B. Carbon dioxide laser

C. Helium neon laser

D. Nd- YAG laser

137. Point out the wrong statement.

A. MEMS stands for microelectromechanical systems

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

C. Several MEMS are packaged in smartphones

D. All of the mentioned

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

A. Transducer

B. Network interface

C. Processor

D. None of the mentioned

139. Input signal to smart sensor is fed from __________

A. Power supply

B. Transducer

C. Voltmeter

D. All of the mentioned

140. Signal conditioning is carried out in ___________

A. Transducer housing

B. Processor

C. Network interface

D. None of the mentioned

141. Output of smart sensors will of ____________

A. Analog

B. Digital

C. Analog and digital

D. None of the mentioned

142. Which of the following defines smartness of sensor?

A. Quality of data

B. Circuit size

C. Circuit components

D. All of the mentioned

143. Input data of smart sensor will be ___________

A. Analog

B. Digital

C. Analog and digital

D. None of the mentioned

144. LDR’s are also called ___________

A. Photo voltaic cell

B. Photo resistive cell

C. Photo emissive cell

D. All of the mentioned

145. Which of the following is not correct for fiber optic sensors?

A. Immune to electromagnetic interference

B. Immune to radiation hazard

C. Can be used in harsh environments

D. None of the mentioned

146. Epoxy material in fiber optics is intended for ____________

A. Better optical properties

B. Better reflection

C. Better sealing

D. Reducing noise

147. Optical fiber sensors are electrically ___________

A. active

B. passive

C. active as well as passive

D. cannot be determined

148. Optical fibers are not immune to ________

A. electronic disturbances

B. magnetic disturbances

C. ambient light interference

D. electromagnetic disturbances

149. 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?

A. extrinsic fiber optic sensor

B. energized fiber optic sensor

C. all fibers are used to simply carry light to and from the external optical devices

D. intrinsic fiber optic sensor

150. Another name for tactile sensor is ___________.

A. Pressure sensor

B. Humidity sensor

C. Touch sensor

D. Temperature sensor

Complete List of MCQ in Electronics Engineering per topic