This set of IOT Multiple Choice Questions & Answers (MCQs) focuses on “Temperature Sensor”.
1. What is ESP8266?
a) WIFI module
b) Sensor
c) Board
d) USB cable
View Answer
Explanation: The ESP8266 WIFI module is used to make an IOT device that plots temperature data on the web.
2. Which sensor is LM35?
a) Pressure sensor
b) Humidity sensor
c) Temperature sensor
d) Touch sensor
View Answer
Explanation: LM35 is a temperature sensor which has 3 legs(Vcc, Vout, GND).
3. How many pins does temperature sensor have?
a) 5 legs
b) 2 legs
c) 4 legs
d) 3 legs
View Answer
Explanation: The temperature sensor LM35 have 3 legs, the first leg is Vcc, you can connect this to the 3.3V. The middle leg is Vout, where the temperature is read from.
4. Monnit temperature sensor is used for what?
a) Accurate results
b) To measure the temperature at high degree
c) Temperature sensor
d) Pressure sensor
View Answer
Explanation: Monnit wireless temperature sensor use a thermistor to accurately measure temperature. These sensors are perfect for monitoring ambient temperatures around the sensors physical location.
5. Which of the following is the Wireless battery-free sensor?
a) LM35
b) RFM3200
c) ESP8266
d) DHT11
View Answer
Explanation: RFM3200 is a wireless battery-free temperature sensor. This flexible sensor is designed to monitor the environment and material temperature in a wide range of settings.
6. Which sensor is used for monitor electric distribution and switching equipment temperature?
a) LM35
b) ESP8266
c) DHT11
d) RFM3200
View Answer
Explanation: It is a battery-free sensor. This lug mounted sensor is designed to monitor electric distribution and switching equipment temperatures. Typical applications include building power distributions, data centers, etc.
7. Electric motor protection has which sensor?
a) Pressure sensor
b) Touch sensor
c) Temperature sensor
d) Humidity sensor
View Answer
Explanation: Electric motor protection has a temperature sensor in it to verify the temperature which is exceeding its limits or not.
8. What is DS18B20?
a) Pressure sensor
b) Touch sensor
c) Humidity sensor
d) Temperature sensor
View Answer
Explanation: It measures temperature and sends an email if the temperature goes under a threshold.
9. What is STSC1?
a) Pressure sensor
b) Temperature sensor
c) Touch sensor
d) Humidity sensor
View Answer
Explanation: The STSC1 focuses on the application that requires very precise temperature measurement. It is suitable for consumer electronics, Internet of Things and smart home applications, as well as for data loggers and thermostats.
10. Line of sight of wireless sensor tag is ________
a) 750ft
b) 700ft
c) 500ft
d) 550ft
View Answer
Explanation: Line of sight range up to 700 ft, requires Ethernet hub. Temperature logging and notification with 0.02oC resolution is temperature sensor.
11. A ________ is thermally sensitive resistor that exhibits a large change in resistance.
a) Thermistor
b) Resistance Thermometer
c) Thermo couple
d) Semiconductor based sensor
View Answer
Explanation: A thermistor is a thermally sensitive resistor that exhibits a large, predictable, and precise change in resistance correlated to variations in temperature.
12. ________ measures temperature by correlating the resistance of the RTD with temperature.
a) Thermistor
b) Resistance Thermometer
c) Thermo couple
d) Semiconductor based sensor
View Answer
Explanation: A Resistance Thermometer measures temperature by correlating the resistance of the RTD with temperature. An RTD consists of a film or, for greater accuracy, a wire wrapped around a ceramic or glass core.
13. ________ consists of two different metals connected at two points.
a) Thermistor
b) Resistance Thermometer
c) Thermocouple
d) Semiconductor based sensor
View Answer
Explanation: Thermocouple consists of two different metals connected at two points. The varying voltage between these two points reflects proportional changes in temperature.
14. Which type of temperature sensor is placed in Integrated Circuits?
a) Thermistor
b) Resistance Thermometer
c) Thermocouple
d) Semiconductor based sensor
View Answer
Explanation: A semiconductor based temperature sensor is placed on Integrated Circuits. They are linear but have the lowest accuracy.
15. Which sensor is linear and low accuracy?
a) Thermistor
b) Resistance Thermometer
c) Thermocouple
d) Semiconductor based sensor
View Answer
Explanation: A semiconductor based temperature sensor is placed on Integrated Circuits. They are linear but have the lowest accuracy.
Sanfoundry Global Education & Learning Series – IOT.
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