Deck 6: Sensors and Optics

Question 1

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

A)Thermistor
B)Resistance Thermometer
C)Thermo couple
D)Semiconductor based sensor

Answer 1

Thermistor

Question 2

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

A)Thermistor
B)Resistance Thermometer
C)Thermo couple
D)Semiconductor based sensor

Answer 2

Resistance Thermometer

Question 3

________ consists of two different metals connected at two points.

A)Thermistor
B)Resistance Thermometer
C)Thermocouple
D)Semiconductor based sensor

Answer 3

Thermocouple

Question 4

Which type of temperature sensor is placed in Integrated Circuits?

A)Thermistor
B)Resistance Thermometer
C)Thermocouple
D)Semiconductor based sensor

Question 5

Which sensor is linear and low accuracy?

A)Thermistor
B)Resistance Thermometer
C)Thermocouple
D)Semiconductor based sensor

Question 6

Piezoelectric transducer is used for measuring __________

A)non-electrical quantities
B)electrical quantities
C)chemical quantities
D)any quantity

Question 7

Piezoelectricity means _________________

A)Electric polarization
B)Electric dielectric
C)Pressure electricity
D)Polar dielectric

Question 8

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

A)1 second
B)1 minute
C)1 hour
D)Infinity

Question 9

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

A)Coherency
B)Directionality
C)Intensity
D)Monochromaticity

Question 10

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

Question 11

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

Question 12

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

A)Transducer
B)Network interface
C)Processor
D)None of the mentioned

Question 13

Input signal to smart sensor is fed from _____________

A)Power supply
B)Transducer
C)Volt meter
D)All of the mentioned

Question 14

Signal conditioning is carried out in ______________

A)Transducer housing
B)Processor
C)Network interface
D)None of the mentioned

Question 15

Output of smart sensors will of ________________

A)Analog
B)Digital
C)Analog and digital
D)None of the mentioned

Question 16

Which of the following defines smartness of sensor?

A)Quality of data
B)Circuit size
C)Circuit components
D)All of the mentioned

Question 17

Input data of smart sensor will be _____________

A)Analog
B)Digital
C)Analog and digital
D)None of the mentioned

Question 18

LDR's are also called _______________

A)Photo voltaic cell
B)Photo resistive cell
C)Photo emissive cell
D)All of the mentioned

Question 19

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

A)Immune to electro magnetic interference
B)Immune to radiation hazard
C)Can be used in harsh environments
D)None of the mentioned

Question 20

Epoxy material in fibre optics is intended for ________________

A)Better optical properties
B)Better reflection
C)Better sealing
D)Reducing noise

Question 21

Optical fiber sensors are electrically ____________

A)active
B)passive
C)active as well as passive
D)cannot be determined

Question 22

Optical fibers are not immune to ________

A)electronic disturbances
B)magnetic disturbances
C)ambient light interference
D)electromagnetic disturbances

Question 23

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

Question 24

Other name for tactile sensor is______________

A)Pressure sensor
B)Humidity sensor
C)Touch sensor
D)Temperature sensor