Question 1

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

Accepted Answer

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

Question 2

LDR's are also called _______________

Accepted Answer

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

Question 3

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?

Accepted Answer

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 A

Question 4

________ consists of two different metals connected at two points.

Accepted Answer

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

Question 5

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

Accepted Answer

A)  Ruby laser
B)  Carbon dioxide laser
C)  Helium neon laser
D)  Nd- YAG laser

Question 6

Which sensor is linear and low accuracy?

Accepted Answer

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

Question 7

Output of smart sensors will of ________________

Accepted Answer

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

Question 8

Which of the following defines smartness of sensor?

Accepted Answer

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

Question 9

Input signal to smart sensor is fed from _____________

Accepted Answer

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

Question 10

Signal conditioning is carried out in ______________

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

Which type of temperature sensor is placed in Integrated Circuits?

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

Optical fiber sensors are electrically ____________

Accepted Answer

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

Question 15

Piezoelectric transducer is used for measuring __________

Accepted Answer

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

Question 16

Piezoelectricity means _________________

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

Epoxy material in fibre optics is intended for ________________

Accepted Answer

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

Question 19

Input data of smart sensor will be _____________

Accepted Answer

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

Question 20

Point out the wrong statement.

Accepted Answer

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

Exam 6: Sensors and Optics

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

LDR's are also called _______________

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?

________ consists of two different metals connected at two points.

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

Which sensor is linear and low accuracy?

Output of smart sensors will of ________________

Which of the following defines smartness of sensor?

Input signal to smart sensor is fed from _____________

Signal conditioning is carried out in ______________

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

Which type of temperature sensor is placed in Integrated Circuits?

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

Optical fiber sensors are electrically ____________

Piezoelectric transducer is used for measuring __________

Piezoelectricity means _________________

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

Epoxy material in fibre optics is intended for ________________

Input data of smart sensor will be _____________

Point out the wrong statement.