Question 1

Which sensor is used in mobile phones?&#10;A)Capacitive touch sensor&#10;B)Temperature sensor&#10;C)Humidity sensor&#10;D)Weight sensor

Accepted Answer

Capacitive touch sensors are commonly used in mobile phones to detect touch input on the screen.

Question 2

The nano particles from iron and palladium are used to produce ________&#10;A)Magnets&#10;B)Magnetic lens&#10;C)Magneto meters&#10;D)Magnetic storage devices

Accepted Answer

Iron and palladium nanoparticles are used in the production of magnetic storage devices due to their magnetic properties, which are essential for storing data in devices such as hard drives and magnetic tapes.

Question 3

Nano particles target the rare _______ causing cells and remove them from blood.&#10;A)Tumour&#10;B)Fever&#10;C)Infection&#10;D)Cold

Accepted Answer

Nanoparticles are engineered to target specific cells, including tumor cells, for therapeutic purposes such as cancer treatment, making them capable of identifying and removing tumor-causing cells from the blood.

Question 4

___________ is the field in which the nano particles are used with silica coated iron oxide iron oxide.&#10;A)Magnetic applications&#10;B)Electronics&#10;C)Medical diagnosis&#10;D)Structural and mechanical materials

Accepted Answer

Medical diagnosis is a field where nanoparticles, such as silica-coated iron oxide, are used. These nanoparticles are particularly useful in imaging techniques, such as magnetic resonance imaging (MRI), due to their magnetic properties and biocompatibility.

Question 5

In which of the following categories be thin plate diaphragm included?&#10;A)Primary transducer&#10;B)Secondary transducer&#10;C)Voltage measuring devices&#10;D)Spring balance systems

Accepted Answer

Thin plate diaphragms are considered primary transducers because they directly respond to a stimulus (such as pressure) and convert it into a measurable signal.

Question 6

Which of the following applications are suited for thin plate diaphragms?&#10;A)Static pressure only&#10;B)Dynamic pressure only&#10;C)Both static and dynamic pressure with large frequency&#10;D)Both static and dynamic pressure with small frequency

Accepted Answer

The answer of Which of the following applications are suited...

Question 7

Which of the following devices convert pressure to displacement?&#10;A)Diaphragm&#10;B)Bellow&#10;C)Capsule&#10;D)Both diaphragm and capsule

Accepted Answer

Diaphragms and capsules are devices that convert pressure into displacement. Diaphragms do this by flexing in response to pressure changes, while capsules, consisting of two diaphragms welded at their perimeters, also move with pressure variations. Bellows, although similar, are not an option by themselves in the given choices.

Question 8

Resistance temperature detector is ___________&#10;A)a electrical tranducer&#10;B)a mechanical transducer&#10;C)a chemical transducer&#10;D)a physical transducer

Accepted Answer

A resistance temperature detector (RTD) is an electrical transducer that converts temperature into an electrical resistance change, allowing for precise temperature measurement.

Question 9

Relation between temperature and resistance of a conductor is ________&#10;A)Rt = Rref [1+t]&#10;B)Rt = Rref [1+??t]&#10;C)Rt = Rref [1-?t]&#10;D)Rt = Rref [1-t]

Accepted Answer

The correct relation between temperature and resistance of a conductor is given by $R_t = R_{\text{ref}} [1 + \alpha t]$, where $R_t$ is the resistance at temperature $t$, $R_{\text{ref}}$ is the reference resistance (usually at 20°C or 0°C), and $\alpha$ is the temperature coefficient of resistance. This formula shows that the resistance of a conductor changes linearly with temperature, and the symbol $\alpha$ (alpha) represents the rate of that change.

Question 10

Sensing element in the thermometer must provide ________&#10;A)small change in resistance&#10;B)no change in resistance&#10;C)large change in resistance&#10;D)infinite change in resistance

Accepted Answer

The sensing element in a thermometer must provide a large change in resistance in response to temperature changes to ensure accurate and sensitive temperature measurement.

Question 11

Resistive transducers are ______________&#10;A)Primary transducers&#10;B)Secondary transducers&#10;C)Either primary or secondary&#10;D)None of the mentioned

Accepted Answer

The answer of Resistive transducers are ______________&#10;A)Primary transducers&#10;B)Secondary transducers&#10;C)Either primary...

Question 12

Which of the following can be used to measure using thermistors?&#10;A)Very low&#10;B)In-between 100? and 1M?&#10;C)Greater than 1M?&#10;D)None of the mentioned

Accepted Answer

The answer of Which of the following can be used...

Question 13

Which of the following is correct for thermistors?&#10;A)Positive temperature coefficient of resistance&#10;B)Negative temperature coefficient of resistance&#10;C)Unpredictable temperature coefficient&#10;D)None of the mentioned

Accepted Answer

The answer of Which of the following is correct for...

Question 14

Thermocouple is a ______________&#10;A)Primary device&#10;B)Secondary transducer&#10;C)Tertiary transducer&#10;D)None of the mentioned

Accepted Answer

The answer of Thermocouple is a ______________&#10;A)Primary device&#10;B)Secondary transducer&#10;C)Tertiary transducer&#10;D)None...

Question 15

Operation of thermocouple is governed by _______________&#10;A)Peltier effect&#10;B)Seebeck effect&#10;C)Thomson effect&#10;D)All of the mentioned

Accepted Answer

The answer of Operation of thermocouple is governed by _______________&#10;A)Peltier...

Question 16

______________ describes current flow between two junctions formed by two different metals.&#10;A)Peltier effect&#10;B)Thomson effect&#10;C)Seebeck effect&#10;D)None of the mentioned

Accepted Answer

The answer of ______________ describes current flow between two junctions...

Question 17

Amount of heat liberated or absorbed when 1A current passes is called ____________&#10;A)Thomson coefficient&#10;B)Peltier coefficient&#10;C)Seebeck coefficient&#10;D)None of the mentioned

Accepted Answer

The answer of Amount of heat liberated or absorbed when...

Question 18

Thermo couple cannot be used to measure ____________&#10;A)Temperature of gas&#10;B)Temperature of liquid&#10;C)IR radiation&#10;D)None of the mentioned

Accepted Answer

The answer of Thermo couple cannot be used to measure...

Question 19

Photoconductive transducers produce output ________&#10;A)due to change in inductance&#10;B)due to change in light&#10;C)due to change in resistance&#10;D)due to change in temperature

Accepted Answer

The answer of Photoconductive transducers produce output ________&#10;A)due to change...

Question 20

Which of the following is correct for a level to force conversions?&#10;A)Liquid at constant density distribution&#10;B)Liquid with different density distribution&#10;C)Level difference should be gradual&#10;D)Liquid should be highly viscous

Accepted Answer

The answer of Which of the following is correct for...

Question 21

Which devices measures gases or liquid?&#10;A)Proximity sensor&#10;B)Pressure sensor&#10;C)Temperature sensor&#10;D)Touch sensor

Accepted Answer

The answer of Which devices measures gases or liquid?&#10;A)Proximity sensor&#10;B)Pressure...

Question 22

Diaphragms in a pressure sensor are of ________&#10;A)2 types&#10;B)5 types&#10;C)10 types&#10;D)20 types

Accepted Answer

The answer of Diaphragms in a pressure sensor are of...

Question 23

Thermocouples consist of a pair of wires made of dissimilar metals joined together at one or more junctions that generate a voltage when subjected to a temperature gradient . This phenomenon is known as the _________

A)Seebeck effect
B)Piezolelectric effect
C)Photovoltaic
D)Photoconductor

Accepted Answer

The answer of Thermocouples consist of a pair of wires...

Question 24

What is the name of the question mark area?&#10;A)Measuring junction&#10;B)Bridge junction&#10;C)Temperature junction&#10;D)Compensating junction

Accepted Answer

The answer of What is the name of the question...

Question 25

Signal conditioner is used for _________&#10;A)attenuating the voltage&#10;B)maintaining a constant voltage&#10;C)keeping the voltage zero&#10;D)boosting the voltage

Accepted Answer

The answer of Signal conditioner is used for _________&#10;A)attenuating the...

Deck 7: Sensors and Transducers