Humidity Sensor Question & Answers December 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 Hint 2). Which of the following is the other form of humidity? Fog Dew Precipitation All the above Hint 3). On which of the following parameters do humidity depends on? Pressure Temperature Volume Both a and b Hint 4). On which of the following air condition, maximum humidity is observed? Hot Cool Warm All the above Hint 5). On which of the parameter do vapour depends on to reach saturation value? Pressure Temperature Volume Both a and b Hint 6). Humidity is measured in _____ number of ways? 2 3 4 5 Hint 7). Which of the following is the units of Absolute humidity? Grams per Kg Percentage Ratio of Mass All the above Hint 8). Which of the following is the units of relative humidity? Grams per Kg Percentage Ratio of Mass All the above Hint 9). Which of the following is the units of specific humidity? Grams per Kg Percentage Ratio of Mass All the above Hint 10). Which of the following is the instrument for measuring humidity with in environment? Humidity Sensor Hygrometer Gyrometer Both a and b Hint 11). Which of the following parameters do hygrometer measures? Humidity Temperature Pressure Both a and b Hint 12). Which of the following parameters do humidity sensor measures? Humidity Temperature Pressure Both a and b Hint 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 Hint 14). What happens to humidity percentage when temperature goes down? 50% 75% 100% 99% Hint 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 Hint 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 Hint 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 Hint 18). On which of the following gradient factor do humidity sensor keep tracks on? Electric currents Temperature Pressure Both a and b Hint 19). Humidity sensors are classified in to _____ types? 2 3 4 5 Hint 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 Hint 21). A remote device that measures humidity and temperature within environment is called ______? Humidity sensor Air sensor Temperature sensor Pressure sensor Hint 22). Which of the following type of humidity sensor measures relative humidity? Capacitive Thermal Resistive All the above Hint 23). Which of the following are the fields of application areas of humidity sensor? Weather Commercial Industries All the above Hint 24). A capacitive type humidity sensor pose ____ type of property? Linear Non-linear Gradient All the above Hint 25). A capacitive type humidity sensor has ____ percent of relative humidity? 0 to 100% 50% 90% 99% Hint Humidity Sensor Interview Questions and Answers 26). Which of the following is the limitation of capacitive type humidity sensor? High cost Complex circuit Regular calibration Both b and c Hint 27). Which of the following type of humidity sensor provide full range of relative humidity value? Capacitive Thermal Resistive All the above Hint 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 Hint 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 Hint 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 Hint 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 Hint 32). Which of the following substance has dielectric value of 80? Air Water Gas All the above Hint 33). At equilibrium condition, A humidity sensors moistures depends on ____ factors? Ambient temperature Ambient water vapour pressure Ambient liquid Both a and b Hint 34). Which of the following are the components of capacitive type humidity sensor? Probe Cable Capacitive sensor All the above Hint 35). How many types of failures are observed in a capacitive type humidity sensor? 3 4 2 6 Hint 36). Which of the following are the characteristics of systematic errors? Predictable Repeatable Nonlinear All the above Hint 37). Systematic errors in capacitive type humidity sensor are specific to __________? Device Temperature Pressure All the above Hint 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 Hint 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 Hint 40). Which of the following type of capacitive type humidity sensors error can be potentially eliminated? Systematic Random Linearity All the above Hint 41). Which of the following type of capacitive type humidity sensors error cannot be potentially eliminated completely? Systematic Random Linearity All the above Hint 42). Which of the following is the dielectric constant value of water at 20 degrees centigrade? 70 80 90 100 Hint 43). What happens to dielectric constant value when increase in temperature in capacitive type humidity sensors? Increases Decreases Constant Zero Hint 44). Which of the following property of capacitive type humidity sensors determines repetitive of humidity sensor? Hysteresis Temperature gradient Pressure All the above Hint 45). On which of the following factors do hysteresis capacitive type humidity sensors depends on? Complete humidity cycle Temperature Equilibrium All the above Hint 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 Hint 47). Which of the following is the units of temperature? Farads Centigrade Celsius All the above Hint 48). Which of the following is the uncertainty factor of calibration process? Homogenity Stability Linearity Both a and b Hint 49). Which of the following is the uncertainty of UUT?a Resolution Hysteresis Repeatability All the above Hint 50). Which of the following is the uncertainty of reference depends on? Calibration Long term stability All the above Hint Humidity Sensor Important Questions for Interviews 51). 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 + ……] Hint 52). Which of the following are the examples of home appliance based humidity sensors? AC’s Dryers VTR All the above Hint 53). Which of the following is the examples of care humidity sensors? Automatic anti-fog AC’s VTR All the above Hint 54). Which of the following is the examples of medical treatment humidity sensors? Incubator Treatment device Dryer Both a and b Hint 55). Which of the following is the examples of industrial humidity sensors? Dryer Fiber Dry food All the above Hint 56). Which of the following is the examples of livestock humidity sensors? Tea smoke anti forest Reptile feeding House AC All the above Hint 57). Which of the following is the examples of test humidity sensors? RF detector Hygrometer Constant temperature and humidity tank All the above Hint 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 Hint 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 Hint 60). 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 65). Which of the following type of electrolyte substance is used in an humidity sensor? LiCl Se Ge Tio2 Hint 66). Which of the following type of semiconducting substance is used in an humidity sensor? LiCl Se Ge Both b and c Hint 67). Which of the following type of metal oxide type film substance is used in an humidity sensor? Tio2 SnO2 ZnCr2o4 All the above Hint 68). Which of the following type of porous metal oxide substance is used in an humidity sensor? Tio2 SnO2 ZnCr2o4 Al2O3 Hint 69). Which of the following type of substance is used as conducting powder in an humidity sensor? Nylon Germanium Cotton Diamond Hint 70). How many categories a moisture sensitive based material humidity sensors are classified? 2 5 6 7 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 89). Which of the following is the hysteresis value of carbon based humidity sensor? 5% 6% 7% 9% Hint 90). Which of the following are the commonly used humidity sensors? HIH-3605 SHT11 SHT15 All the above Hint 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 Hint 92). Which of the following are the basic components of humidity sensor? Sensor element Thermistor Capacitive or resistive components All the above Hint Read more about Thermistors. 93). What should be the value of resistive materials used in resistive type humidity sensor? High Low Zero Constant Hint 94). Which of the following are the examples of resistive type humidity sensor? Salt Conductive polymer Solid electrolytes All the above Hint 95). Which of the following are the other components interfaced with humidity sensor? Raspberry Pi Arduino Micro controllers All the above Hint 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 Hint 97). DHT11 is a _____ type of humidity measurement device? Resistive Capacitive Inductive All the above Hint 98). How many bit microcontroller is used in DHT11 type humidity sensor? 4 Bit 8 Bit 12 Bit 16 Bit Hint 99). Which of the following is the response time value of a DHT11 type humidity sensor? 20s 30s 40s 50s Hint 100). Which of the following is the maximum value of power supply provided to DHT11 type humidity sensor? 5V 5.5V 6V 6.5V Hint Time is Up! Time's up
