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IR Sensor Question & Answers

June 15, 2022 By WatElectronics

This article lists 50 IR Sensor MCQs for Engineering Students. All the IR Sensor Questions & Answers given below include solutions and links to the relevant topic. This is helpful for users who are preparing for their exams and interviews, or professionals who would like to brush up on the fundamentals of the IR Sensor.

The IR sensors or infrared sensors come in two bags one is a receiver and another one is a transmitter, and also the Ir sensors come in various packages and they differ in size also. The IR sensors are of two types they are active infrared sensors and passive infrared sensors.

The sensor which is used for the automatic door opening system is the PIR sensor, the PIR sensor is also one type of IR sensor. The advantages of passive infrared sensors are they are low cost and have a short response time, and the disadvantage is it has a high miss rate.

The advantages of active infrared sensors have a long-range and short response time and the disadvantage is they are expensive compared to passive infrared sensors.

Infrared radiation is a type of light that falls outside the visible spectrum but can be felt as heat. The transmitter emits IR light and the receiver keeps checking for reflected light. The IR sensor is one type of digital sensor thus its output will either be zero or one.

1). Which one of the following sensors is used for the automatic door opening system?

Hint
2). What is the standard form of PIR sensor?

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3). Which one of the following sensors is used for distance measurement?

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4). Which one of the following sensors is not portable?

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5). Which one of the following sensors is expensive?

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6). The wavelength of infrared sensor is from ____________ Nano meters?

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7). The vibration in raman spectroscopy is _________________ active?

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8). Which one of the following methods gives an indication of ionic character in the molecule?

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9). What is the standard form of CCD?

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10). Which one of the following is insensitive to stray light?

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11). The operating principle of infrared sensors is ______________?

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12). The dual type Pyro electric infrared sensors are used for human body detection in a _______________ mounted set?

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13). What is the standard form of QWIP?

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14). Which one of the following needs lines of sight?

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15). Which one of the following cannot penetrate solid objects?

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16). The transmission power range of infrared wireless technology is up to __________________ mW?

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17). The data rate of infrared wireless technology is up to _______________ Mbps?

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18). Which one of the following supports only two devices?

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19). What is the standard form of MWIR thermal detectors?

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20). The wavelength of visible light is from ____________ Nano meters?

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IR Sensor MCQs for Quiz

21). The vibration in IR spectroscopy is _________________ active?

Hint
22). What is the standard form of NEP?

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23). Which one of the following sensor measure distance through reflected light waves?

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24). Which one of the following is an example of a passive infrared sensor?

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25). The sensing distance of proximity sensor is _____________?

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26). Which one of the following is a type of nontactile sensor?

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27). The transmission power is 100mW in _________ wireless technology?

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28). The infrared sensors have __________ data transmission rate?

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29). The figure shown below is a block diagram of ___________ sensor?

UV Sensor Block Diagram

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30). What are the disadvantages of infrared sensors?

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IR Sensor MCQs for Exams

31). Which one of the following methods gives an indication of covalent character in the molecule?

Hint
32). What is the standard form of FTIR?

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33). The quad type Pyro electric infrared sensors are used for human body detection in a _______________ mounted set?

Hint
34). What is the standard form of QDWELL?

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35). Which one of the following sensors has a long response time?

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36). Which one of the following is an example of the active infrared sensor?

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37). The sensing distance of capacitance sensor is _____________?

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38). Which one of the following is a type of tactile sensor?

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39). The transmission power is 1mW in _________ wireless technology?

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40). The figure shown below is a block diagram of ___________ sensor?

IR sensor

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IR Sensor MCQs for Interviews

41). What are the advantages of infrared sensors?

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42). In which one of the following spectroscopy the water cannot be used as solvent?

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43). The break beam sensor is an example for ____________ sensor?

Hint
Read more about Sensors
44). The sensing distance of photoelectric sensor is _____________?

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45). What is the standard form of TQDIP?

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46). Which one of the following is suitable to measure complex objects?

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47). In which one of the following rays the color sensation is sensitive?

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48). Which one of the following rays is non-sensitive for sound speed change?

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49). Which one of the following is a disadvantage of the passive infrared sensors?

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50). What is the standard form of DTGS?

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Read more about IR Sensor
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