Humidity Sensor Question & AnswersDecember 6, 2021 By WatElectronics This article lists 100 Humidity Sensor MCQs for engineering students. All the Humidity Sensor Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Humidity Sensor.A sensor is an electronic device that detects physical property within a bounded area and represents it in digital form. They are available in a large number of varieties designed based on physical parameters like humidity, temperature, moisture, motion, etc being measured. Among which a sensor that measures the humidity value within the area and represents digitally on screen is called a humidity sensor. Basically, the humidity of air contains a concentration of water in vapor form which is a combination of liquid and gas. This humidity is released into the environment from appliances such as air conditions, frizz, and other sources. The humidity sensor measuring the humidity value within the environment mainly depends on the temperature and humidity factor of water vapor which is calculated or represented using absolute and relative humidity factors.They are further classified based on the substance (resistive, capacitive, thermal conductivity, or resonant frequency) used. Hygrometers, DHT11, HIH-3605 (Honeywell), SHT11 (Sensiron), and SHT15 (Sensiron) are a few examples of humidity sensors. They benefit in terms of wide range coverage, measures relative humidity, provide efficient results, greater design freedom, and depend on log values. But limit in terms of complex based circuit and requires calibration on regular base, maximum temperature characteristics, difficulty in log conversion leads to disruption in obtaining linear characteristics and is affected to interference easily.1). Humidity of air contains ______ concentration? Gas Water in vapour Liquid All the above HintAll the water forms.2). Which of the following is the other form of humidity? Fog Dew Precipitation All the above HintGaseous forms.3). On which of the following parameters do humidity depends on? Pressure Temperature Volume Both a and b HintOn gaseous parameter.4). On which of the following air condition, maximum humidity is observed? Hot Cool Warm All the above HintTemperature expressed in minus degrees.5). On which of the parameter do vapour depends on to reach saturation value? Pressure Temperature Volume Both a and b HintExpressed in degree centigrate.6). Humidity is measured in _____ number of ways? 2 3 4 5 HintOdd value.7). Which of the following is the units of Absolute humidity? Grams per Kg Percentage Ratio of Mass All the above HintUnits of mass.8). Which of the following is the units of relative humidity? Grams per Kg Percentage Ratio of Mass All the above HintExpressed in multiplication of 100.9). Which of the following is the units of specific humidity? Grams per Kg Percentage Ratio of Mass All the above HintEpressed as division.10). Which of the following is the instrument for measuring humidity with in environment? Humidity Sensor Hygrometer Gyrometer Both a and b HintMeters that measure vapor.11). Which of the following parameters do hygrometer measures? Humidity Temperature Pressure Both a and b HintGas form of parameter.12). Which of the following parameters do humidity sensor measures? Humidity Temperature Pressure Both a and b HintGaseous parameter.13). Which of the following humidity parameter defines the measurement of ratio of quantity of humidity existing in air to expected quantity of humidity? Relative humidity Specific humidity Absolute humidity All the above HintRepresented in percentage.14). What happens to humidity percentage when temperature goes down? 50% 75% 100% 99% HintMaximum value.15). Which of the following humidity parameter defines existence of mass of water vapour in a unit quantity of mass of air moisture? Relative humidity Specific humidity Absolute humidity All the above HintExpressed in mass.16). Which of the following humidity parameter defines measurement of quantity of water vapour in air? Relative humidity Specific humidity Absolute humidity All the above HintExpressed in grams per Kg.17). Which of the following factor of humidity sensor plays a key role while considering compatibility? Relative humidity Specific humidity Absolute humidity All the above HintExpressed in percentage.18). On which of the following gradient factor do humidity sensor keep tracks on? Electric currents Temperature Pressure Both a and b HintOn current and temperature parameter.19). Humidity sensors are classified in to _____ types? 2 3 4 5 HintOdd number. Read more about Capacitive sensor.20). A device that tracks physical parameter and translates into digital form of parameter is called_______? Sensor Transducer Amplifier Both a and b HintA converter device.21). A remote device that measures humidity and temperature within environment is called ______? Humidity sensor Air sensor Temperature sensor Pressure sensor HintWater vapour sensor.22). Which of the following type of humidity sensor measures relative humidity? Capacitive Thermal Resistive All the above HintDevice with parallel plates.23). Which of the following are the fields of application areas of humidity sensor? Weather Commercial Industries All the above HintBoth natural and un natural environment application.24). A capacitive type humidity sensor pose ____ type of property? Linear Non-linear Gradient All the above HintSupplied input equal to output.25). A capacitive type humidity sensor has ____ percent of relative humidity? 0 to 100% 50% 90% 99% HintMaximum value.Humidity Sensor Interview Questions and Answers26). Which of the following is the limitation of capacitive type humidity sensor? High cost Complex circuit Regular calibration Both b and c HintRelated to circuit parameter.27). Which of the following type of humidity sensor provide full range of relative humidity value? Capacitive Thermal Resistive All the above HintHas 2 parallel plates.28). Which of the following is the advantage of capacitive type humidity sensor? Used over wide range Has 0 to 100 % of coverage Measures relative humidity All the above HintMaximum parameters.29). Which of the following type of substance29. Which of the following type of substance do a capacitive type humidity sensor uses? do a capacitive type humidity sensor uses? Polymer Plastic Cotton Both a and b HintPolyester based component.30). Which of the following is the dielectric value of capacitive type humidity sensor? 2 to 15 2 to 20 2 to 10 2 to 5 HintUp to odd range.31). Which of the following parameter of capacitive type humidity sensor measures capacitance value in absence of moisture in sensor? Constant Geometry Moisture Both a and b HintConstant value.32). Which of the following substance has dielectric value of 80? Air Water Gas All the above HintLiquid state.33). At equilibrium condition, A humidity sensors moistures depends on ____ factors? Ambient temperature Ambient water vapour pressure Ambient liquid Both a and b HintMeasures in degrees centigrade.34). Which of the following are the components of capacitive type humidity sensor? Probe Cable Capacitive sensor All the above HintMajor components.35). How many types of failures are observed in a capacitive type humidity sensor? 3 4 2 6 HintEven number.36). Which of the following are the characteristics of systematic errors? Predictable Repeatable Nonlinear All the above HintSystematic error may have periodicity, can be [predicted and nonlinear.37). Systematic errors in capacitive type humidity sensor are specific to __________? Device Temperature Pressure All the above HintEquipment.38). Which of the following are the characteristics of random based errors of capacitive type humidity sensor? Unpredictable Depends on external factors Pose hysteresis All the above HintDepends on sensors parameter and watervapour.39). On which of the following factors do random errors in capacitive type humidity sensor depends on? Stats data Judgement Calibrated data All the above HintResultant data.40). Which of the following type of capacitive type humidity sensors error can be potentially eliminated? Systematic Random Linearity All the above HintIrregular values of capacitance.41). Which of the following type of capacitive type humidity sensors error cannot be potentially eliminated completely? Systematic Random Linearity All the above HintA systematic type of capacitive type humidity sensors error cannot be potentially eliminated completely.42). Which of the following is the dielectric constant value of water at 20 degrees centigrade? 70 80 90 100 HintMultiples of 4.43). What happens to dielectric constant value when increase in temperature in capacitive type humidity sensors? Increases Decreases Constant Zero HintMinimum value.44). Which of the following property of capacitive type humidity sensors determines repetitive of humidity sensor? Hysteresis Temperature gradient Pressure All the above HintHysteresis property.45). On which of the following factors do hysteresis capacitive type humidity sensors depends on? Complete humidity cycle Temperature Equilibrium All the above HintOn maximum parameters. Read more about Hysteresis.46). Based on which of the following factors do hysteresis factor increases of a hysteresis capacitive type humidity sensors? Temperature Humidity Pressure Both a and b Hint2 factors of vapour.47). Which of the following is the units of temperature? Farads Centigrade Celsius All the above HintExpressed in Farads and other CGS units.48). Which of the following is the uncertainty factor of calibration process? Homogenity Stability Linearity Both a and b HintConstant function.49). Which of the following is the uncertainty of UUT?a Resolution Hysteresis Repeatability All the above HintMaximum parameters.50). Which of the following is the uncertainty of reference depends on? Calibration Long term stability All the above HintMaximum parameters.Humidity Sensor Important Questions for Interviews51). Which of the following is the uncertainty formula of capacitive type humidity sensors? sqrt [ u 2 A + u 2 B,1 + u 2 B,2 + ……] sqrt [ u 2 A - u 2 B,1 + u 2 B,2 + ……] sqrt [ u 2 A + u 2 B,1 - u 2 B,2 + ……] sqrt [ u 2 A + u 2 B,1 / u 2 B,2 + ……] HintSum of terms.52). Which of the following are the examples of home appliance based humidity sensors? AC’s Dryers VTR All the above HintDIY electronic appliances used at home.53). Which of the following is the examples of care humidity sensors? Automatic anti-fog AC’s VTR All the above HintFog based equipment.54). Which of the following is the examples of medical treatment humidity sensors? Incubator Treatment device Dryer Both a and b HintElectronic device55). Which of the following is the examples of industrial humidity sensors? Dryer Fiber Dry food All the above HintDIY appliances.56). Which of the following is the examples of livestock humidity sensors? Tea smoke anti forest Reptile feeding House AC All the above HintDIY applications.57). Which of the following is the examples of test humidity sensors? RF detector Hygrometer Constant temperature and humidity tank All the above HintEnvironment parameters calculation based sensors. Read more about RF detectors.58). Which of the following is the operating humidity sensors range of home appliance (AC) application? 5 to 40 80 5 to 60 20 to 80 HintMid range.59). Which of the following is the operating humidity sensors range of home appliance (dryer) application? 5 to 40 80 5 to 60 20 to 80 HintMaximum range value60). Which of the following is the operating humidity sensors range of home appliance (VTR) application? 5 to 40 80 5 to 60 20 to 80 HintBelow maximum range.61). Which of the following is the operating humidity sensors range of Industry application (Dry food)? 10 to 30 50 to 100 5 to 100 5 to 40 HintMinimum value to maximum value range.62). Which of the following is the operating humidity sensors range of Livestock application (House AC)? 5 to 40 10 to 60 5 to 100 5 to 25 HintMaximum range.63). Which of the following is the operating humidity sensors range of Test application (Rf detector)? 5 to 40 10 to 60 5 to 100 5 to 25 HintMid range.64). Which of the following is the operating humidity sensors range of Soil moisture? 5 to 40 10 to 60 5 to 100 20 to 50 HintMid value.65). Which of the following type of electrolyte substance is used in an humidity sensor? LiCl Se Ge Tio2 HintElement containing Chlorine composition.66). Which of the following type of semiconducting substance is used in an humidity sensor? LiCl Se Ge Both b and c HintSemiconducting elements used in pn diode.67). Which of the following type of metal oxide type film substance is used in an humidity sensor? Tio2 SnO2 ZnCr2o4 All the above HintElements with oxygen componsistion.68). Which of the following type of porous metal oxide substance is used in an humidity sensor? Tio2 SnO2 ZnCr2o4 Al2O3 HintElement with Aluminum concentration.69). Which of the following type of substance is used as conducting powder in an humidity sensor? Nylon Germanium Cotton Diamond HintA substance that has cold resistance.70). How many categories a moisture sensitive based material humidity sensors are classified? 2 5 6 7 HintOdd value.71). Which of the following is the detection method used in Electrolyte moisture sensitive (LiCl + Polyviny1 Alco1 Polystyrene) materials humidity sensors? Resistive Capacitive Resonant frequency All the above HintA property that opposes current flow.73). Which of the following is the detection method used in Electrolyte moisture sensitive (Potassium sulfate membrane) material humidity sensors? Resistive Capacitive Resonant frequency All the above HintSubstance containing potassium composition.74). Which of the following is the detection method used in Electrolyte moisture sensitive (LiC1 saturated solution) material humidity sensors? Resistive Capacitive Resonant frequency All the above HintParameter that opposes current flow.75). Which of the following is the detection method used in Electrolyte moisture sensitive (Se vapour deposition film) material humidity sensors? Resistive Capacitive Resonant frequency All the above HintComponent that stores charge in it.Humidity Sensor Quiz Questions and Answers.76). Which of the following is the detection method used in Electrolyte moisture sensitive (Si2 + SiO2 + PAPA [Polyamino Phenylacetylene) material humidity sensors? Resistive Capacitive Resonant frequency All the above HintA component that opposes flow of current.77). Which of the following is the detection method is used in Metal oxide (Fe3O4 colloid coating film) based humidity sensors? Resistive Capacitive Resonant frequency All the above HintComponent that opposes current.78). Which of the following is the detection method is used in Metal oxide (Glass ceramic) based humidity sensors? Resistive Capacitive Resonant frequency All the above HintA component that stores charge.79). Which of the following is the detection method is used in Metal oxide (Mg Cr2O4 type ceramic) based humidity sensors? Resistive Capacitive Resonant frequency All the above HintComponent that stores charge in it.80). Which of the following is the detection method is used in Metal oxide (ZnO-Li2O-V2o5) based humidity sensors? Resistive Capacitive Resonant frequency All the above HintComponent that opposes current.81). Which of the following is the detection method is used in Polymer (Al2O3 + epoxy resin) based humidity sensors? Resistive Capacitive Resonant frequency Both a and b HintComponents those stores charge and opposes current flow.82). Which of the following is the detection method is used in Polymer (Multi emulsion resin film) based humidity sensors? Resistive Capacitive Resonant frequency Both a and b HintComponent that stores charge in it.83). Which of the following is the detection method is used in Organic material (Carbon) based humidity sensors? Resistive Capacitive Resonant frequency Both a and b HintComponent that opposes current.84). Which of the following is the detection method is used in Organic material (Butyr Cellalose) based humidity sensors? Resistive Capacitive Resonant frequency Both a and b HintComponent that stores charge in it.85). Which of the following is the detection method is used in Organic material (Resin Carbon) based humidity sensors? Resistive Capacitive Resonant frequency Both a and b HintComponent that opposes current.86). Which of the following is the detection method is used in Organic material (Polyamid + Crystal Oscillator) based humidity sensors? Resistive Capacitive Resonant frequency Both a and b HintMethod that expresses in terms of Hertz.87). Which of the following are the advantages of resistive type humidity sensor? Provides efficient result Greater design freedom Depends on log values All the above HintPerformance and design related benifits.88). Which of the following are the disadvantages of resistive type humidity sensor? High temperature characteristics is observed Difficulty in log conversion leads to disruption in obtaining linear characteristics Affected to interference easily All the above HintLimitation in parameters89). Which of the following is the hysteresis value of carbon based humidity sensor? 5% 6% 7% 9% HintOdd value.90). Which of the following are the commonly used humidity sensors? HIH-3605 SHT11 SHT15 All the above HintThe commonly used humidity sensors are HIH-3605 (Honeywell), SHT11 (Sensiron) and SHT15 (Sensiron).91). Which of the following are the characteristics of linear voltage based output IC humidity sensor? Constant voltage supply Built in amplifier Strong anti-pollution ability All the above HintMaximum parameteers.92). Which of the following are the basic components of humidity sensor? Sensor element Thermistor Capacitive or resistive components All the above HintComponents that has sensitivity factor, component with storage capacity on charging and component that protects circuit from shocks. Read more about Thermistors.93). What should be the value of resistive materials used in resistive type humidity sensor? High Low Zero Constant HintMinimum value.94). Which of the following are the examples of resistive type humidity sensor? Salt Conductive polymer Solid electrolytes All the above HintSubstances that provides resistivity factors against water vapor.95). Which of the following are the other components interfaced with humidity sensor? Raspberry Pi Arduino Micro controllers All the above HintElectronic device that are heart of computer. Read more about Arduino.96). Which of the following techniques are used in DTH11 type humidity sensor? Digital signal based acquisition Temperature sensing technology Humidity sensing technology All the above HintSensing technology,97). DHT11 is a _____ type of humidity measurement device? Resistive Capacitive Inductive All the above HintComponent that opposes current.98). How many bit microcontroller is used in DHT11 type humidity sensor? 4 Bit 8 Bit 12 Bit 16 Bit Hint4+4=?99). Which of the following is the response time value of a DHT11 type humidity sensor? 20s 30s 40s 50s HintStandard value(6*5=?).100). Which of the following is the maximum value of power supply provided to DHT11 type humidity sensor? 5V 5.5V 6V 6.5V HintStandard voltage value. Time is Up! Time's up
