1. ________ measures temperature by correlating the resistance of the RTD with temperature.
a) Thermistor
b) Resistance Thermometer
c) Thermo couple
d) Semiconductor based sensor
Explanation: An RTD, 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.
2. ________ consists of two different metals connected at two points.
a) Thermistor
b) Resistance Thermometer
c) Thermocouple
d) Semiconductor based sensor
Explanation: Thermocouple consists of two different metals connected at two points. The varying voltage between these two points reflects proportional changes in temperature.
3. Which type of temperature sensor is placed in Integrated Circuits?
a) Thermistor
b) Resistance Thermometer
c) Thermocouple
d) Semiconductor based sensor
Explanation: A semiconductor based temperature sensor is placed on Integrated Circuits. They are linear but have the lowest accuracy.
4. Which sensor is linear and low accuracy?
a) Thermistor
b) Resistance Thermometer
c) Thermocouple
d) Semiconductor based sensor
Explanation: A semiconductor based temperature sensor is placed on Integrated Circuits. They are linear but have the lowest accuracy.
5. DHT11 is __________ sensor.
a) Proximity sensor
b) Humidity sensor
c) Touch sensor
d) Pressure sensor
Explanation: We can read data from any sensor and analyse it graphically from anywhere in the world. Here, we can read temperature and humidity data from DHT11 sensor and upload it to a Think speak cloud using Arduino Uno.
6. What is ESP8266?
a) Sensor
b) WIFI module
c) Board
d) USB cable
Explanation: ESP8266 is a WIFI module, which is serial. And also it is small, cheap, and easy to use.
7. What is humidity sensor?
a) Hygrometer
b) Gyroscope
c) Sesimoscope
d) Sundial
Explanation: A hygrometer is an instrument used for measuring the water vapor in the atmosphere. Humidity measurement instruments usually rely on measurements of some quantity such as temperature, pressure, mass or a mechanical or electrical change.
8. Units for Humidity sensor____________
a) Dew/fost point or Relative Humidity
b) Relative Humidity or Parts Per Million
c) Dew/fost point or Parts Per Million
d) Dew/fost point or Parts Per Million or Relative Humidity
Explanation: Most commonly units for humidity measurement are Relative Humidity(RH), DEW/Fost point (D/F PT) and Parts Per Million(PPM). RH is a function of temperature. DEW/Fost point is a function of the pressure of the as but is independent of temperature and is therefore defined as absolute humidity measurement of temperature. PPM is also an absolute measurement.
9. Dew point and Fost point are mainly used in which conditions?
a) Water vapor
b) Pressure of gas
c) Dryness of gas
d) Moisture in gas
Explanation: Dew point and Fost point are often used when the dryness of the gas is important. Dew point is also used as an indicator of water vapor in high temperature processes, such as industrial drying.
10. Units for Absolute Humidity is ________
a) grams/m3
b) % by volume
c) PPMV
d) %
Explanation: Absolute Humidity is defined as ratio of mass (vapor) to volume and has units of grams/m3.