Transducer Question & AnswersFebruary 9, 2022 By WatElectronics This article lists 100 Transducer MCQs for engineering students. All the Transducer 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 Transducer.According to electronics theory, a transducer is an electronic device that translates input physical parameters into a binary digit format. The input provided to the transducer can be in different physical parameter forms such as temperature, pressure, sound, and more. They are designed based on the input physical parameters provided such as temperature transducer, sound transducer, piezoelectric transducer, etc. They are classified into 2 types namely active and passive transducer.A transducer that requires power for its operation is a passive type transducer also called source dependent transducer or passive transducer, for example resistive, inductive, and capacitive type transducer. A transducer that does not require power for its operation is an active transducer, for example, Thermocouple. These transducers are used in different applications such as oscillators, thermometers, AC, fridges, heavy machines, etc. They benefit in terms of high-frequency response, high sensitivity, digital representation, maintaining accuracy. But limits in terms of high noise, high-temperature sensitivity factor leads to change in the output result.1). A device that follows a process to represent a form of energy into other energy for is ____? Reflector Transducer Oscillator Filter HintEnergy converter device.2). Which of the following applications systems are deployed with transducers? Automations Measurements Control systems All the above Hint3 applications.3). Which of the following might be the form of input applied to transducers? Light Force Energy All the above HintPhysical parameter form.4). A process of converting energy in one form to another form is called ______? Transduction Reflection Rectification Deflection HintA process of converting energy in one form to another form.5). Which of the following is the applications of transducers? Microphones Loudspeakers Antenna sensor All the above Hint3 applications.6). How many basic conditions are used by a transducer operation? 2 3 4 5 HintEven number of conditions.7). _____ condition in transducer is defined as ratio of maximum and minimum signal amplitude? Dynamic range Repeatability SNR Hysteresis HintVariable value condition.8). A transducer with _____ value of dynamic range has better sensitivity factor? Zero Maximum Minimum Constant HintDynamic range and sensitivity of transducer are directly proportional.9). Which of the following are the properties of a maximum dynamic range of a transducer? High sensitivity More precise Low noise Both a and b Hint2 properties.10). ____ is defined as distortion in signal? Noise Wavelength Frequency Bandwidth HintDisturbance in signal.11). ____ condition in transducer is defined as generation of same quantity of output with respect to input? Dynamic range Repeatability SNR Hysteresis HintThe degree of agreement between results of successive measurements of the same variable carried out under the same measurement conditions.12). Noise in transducer is added due to _____ reason? Thermal action Electrons doping Cooling substance All the above HintA form of energy that is transferred between two substances at different temperatures.13). Which of the following is the correct statement regarding to noise in signal? Small quantity signals are subject to higher noise rate Larger quantity signals are subject to higher noise rate Small quantity signals are subject to lower noise rate Both a and c HintSignal strength and noise inversely proportional.14). Nosie is measured in terms of _____? Decibels Hertz Centimeters Hertz/meter HintA measuring the relative loudness of sounds.15). ____ condition in transducer is defined as output of a transducer depends on both present and previous input ? Dynamic range Repeatability SNR Hysteresis HintRelated to magnetic field.16). A transducer is classified in to ____ number of types? 2 3 4 5 HintEven number.17). Which of the following type of transducer requires power for its operation? Active Passive Source dependent Both b and c HintExamples capacitance, resistance, or inductance.18). Which of the following type of transducer does not requires power for its operation? Active Passive Source dependent Both b and c HintExamples Piezo Electric, Photo Electric, and Thermo Electric.19). Which of the following is the working principle of active type transducer? Energy conversion Energy dissipation Load pressure All the above HintOther form representation.20). Which of the following is an example of active type transducer? Thermocouple Photocell LDR All the above HintA sensor that measures temperature.21). The output generate from active type transducer is _____ form? Electric Capacitance Resistance Both b and c HintCurrent and voltage form.22). The output generated from passive type transducer is _____ form? Electric Capacitance Resistance Both b and c Hint2 types. Read more about Capacitive Transducer..23). A passive type transducer converts the obtained output in capacitance or resistance form to _____ form? Current Voltage Inductance Both a and b HintMeasured in Amps and volts.24). An active type non-electrical based transducer is classified in to ____ types? 2 3 4 5 HintOdd number.25). Which of the following is the input provided to piezo electric transducer? Temperature Pressure Light All the above HintThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.Transducer Interview Questions and Answers26). Which of the following substances exhibits piezo electric effect? Tourmaline Rochelle salts Quartz All the above Hint3 substances. Read more about the Crystal Oscillator.27). A Quartz substance has ____ quantity of piezo electric effect? High Low Moderate Zero HintAverage value.28). Which of the following is the correct sequence of mechanical strength of piezo electric substance? Tourmaline>Quartz>Rochelle salts Quartz>Tourmaline>Rochelle salts Rochelle salt>Tourmaline>Quartz Rochelle salt=Tourmaline>Quartz HintAscending order.29). Which of the following are the components of Quartz transducer? Quartz crystal Force summing member Base All the above Hint3 components.30). Between which of the following components in Quartz transducer the crystal is placed? Pressure inlet - Force summing member Force summing member - Base Base - Force summing member Base - Pressure inlet HintTop most and bottom most component.31). Which of the following is the output voltage formula of a Quartz transducer? V0= Q/C V0=C/Q V0=Q+C V0=Q-C HintDeduction formula.32). Which of the following is the input quantity provided to photoelectric type transducer? Pressure Light Sound Air HintThe emission of electrons when electromagnetic radiation, hits a material.33). Which of the following are the components of a photoelectric transducer? Light Resistor Battery All the above Hint3 components.34). Which of the following are the components present in photoelectric transducers bulb? Anode Cathode Capacitor Both a and b HintInverted and non-inverted terminals.35). On which of the following component incidence of light in photoelectric transducers generates electrons? Anode Cathode Non-inverting All the above HintInverted terminal.36). To which of the following terminal in photoelectric transducers electrons gets attracted to generate current? Anode Cathode Inverting All the above HintNon-inverting terminal.37). Which of the following is the sensitivity formula of photoelectric transducers? S=I/i S=I+i S=I-i S=I*i HintRatio of terms.38). Which of the following is the input applied to thermo electric transducer? Pressure Light Temperature Air HintA measure of hotness or coldness.39). A thermo electric transducer is classified in to ____ types? 1 2 3 4 HintEven number.40). In which of the following form a thermistor type transducer generates output? Analog Digital Continuous Both a and b HintRepresenting signals or information by a continuously variable physical quantity like spatial position, voltage, etc.41). A thermistor transducer has ____ number of terminals? 1 2 3 4 HintEven number.42). A thermistor transducer is designed with ____ substance? Semiconductor Insulator Conductor All the above HintGermanium and Silicon. Read more about Semiconductor Types.43). The value of thermistor transducers temperature coefficient is _____? Positive Negative Zero Infinite HintInverted value. Read more about Thermistor.44). The value of resistance _____ with increase in temperature of thermistor transducers? Increases Decreases Constant Zero HintResistance and temperature inversely proportional.45). A thermistor transducers is also called ______? Thermal resistor Thermal conductor Thermal insulator All the above HintMeasures temperature.46). Which of the following are the benefits of thermistor transducers? Budget friendly Accurate measurement Robust All the above Hint3 advantages.47). Which of the following are the applications of thermistor transducers? Microwave ovens Fridge Batteries All the above HintDomestic appliances.48). The value of resistance of a thermistor device can be measured using ____ device? Ohmmeter Potentiometer Barometer Galvanometer HintV=IR. Read more about Ohmmeter.49). Characteristics of thermistor transducers is plotted between _____ parameters? Current and resistance Temperature and voltage Current and temperature Temperature and resistance HintAmperes and Ohms.50). Thermistors are classified in to ____ types? 2 3 4 5 HintEven number.Transducer MCQs for Exams51). In a Positive Temperature Coefficient thermistor, increase in temperature ____ the value of device resistance? Increases Decreases Constant Zero HintPositive Temperature Coefficient and temperature in thermistor are directly proportional.52). Which of the following is temperature sensing range of a thermistor transducer? 55 to 150 oC 50 to 130 oC 45 to 130 oC 155 to 250 oC HintLower that maximum value range.53). Which of the following is the advantage of thermistor transducer? Quick response Stable output Less noise Both a and b Hint2 parameters.54). Which of the following type of transducer joins 2 different metals? Thermocouple Thermistor Bimetalic strip Both a and c HintAn electrical device consisting of two dissimilar electrical conductors forming an electrical junction.55). At gradient in temperature of thermistor transducer ____ is generated at output? EMF Current Voltage Temperature HintEqual to the terminal potential difference when no current flows.56). Which of the following is the equation of thermistor transducer emf ____? e=T1-T2 e=T1+T2 e=T1*T2 e=T1/T2 HintSum of terms.57). Temperature is measured in terms of ____ units? Centigrade Celsius Henrys Both a and b Hint2 units.58). Which of the following properties a capacitive type transducer measures? Displacement Pressure Temperature All the above Hint3 properties.59). Which of the following is the working principle of capacitive type transducer? Variable capacitance Constant capacitance Variable power Variable temperature HintVariable value between 2 plates.60). How many number of metal plates a capacitive type transducer comprises of? 1 2 3 4 HintEven number.61). Which of the following is the dielectric medium form used in capacitive type transducer? Air Gas Liquid All the above HintSubstances that opposes current flow.62). In how many modes do a capacitive type transducer works? 1 2 3 4 HintEven number.63). The characteristics of operation of capacitive type transducer is plotted between____ parameters? Capacitance and displacement Capacitance and pressure Pressure and displacement Temperature and capacitance HintVariation between 2 parallel plates.64). Which of the following are the advantages of a capacitive type transducer? High sensitive High resolution Unaffected by magnetic fields All the above Hint3 advantages.65). Which of the following is the accuracy percent of capacitive type transducer? 0.005% 0.01% 0.1% 0.5% HintFraction value.66). Which of the following is the resolution rate achieved from capacitive type transducer? 2.5*10^-3 3.5*10^-3 4.5*10^-3 5.5*10^-3 HintMinimum value.67). A complex based measuring device is added at the output of capacitive type transducer to measure _____ parameter? Temperature Resistance Impedance Inductance HintRepresented by the symbol Z.68). Which of the following are the disadvantages of a capacitive type transducer? Displays non-linear output Measures even small quantity of source creating error Capacitance varies easily with change in input parameters All the above Hint3 disadvantages.69). ____ component is responsible for controlling the mechanisms of sensor? Actuator Converter Diverter All the above HintA device that produces a motion by converting energy and signals going into the system.70). Which of the following are the examples of bidirectional type transducer? Radio receiver Voice coils Dynamic microphones All the above HintCommunication appliances. Read more about Wireless Radio Frequency Technology.71). A photo-conductive mode in photo transducer is ___ biased? Forward Reverse Zero Both a and b HintA voltage across the diode in the opposite direction.72). Which of the following are the examples of passive transducer? Resistive transducer Inductive transducer Capacitive transducer All the above HintA components that require external source.73). A resistive type transducer is a ____ device? Electric Mechanic Electronic Both b and c HintComponents for controlling the flow of electrical currents for the purpose of information processing and system control.74). Which of the following are the examples of resistive type transducer? LDR Thermistor transducer Resistive pressure transducer All the above Hint3 examples.75). A resistive type transducer is used for calculating ____? Temperature Displacement Force All the above Hint3 parameters.Transducer Quiz Questions and Answers.76). Which of the following is the resistivity formula of resistivity? R=pl/A R=pA/l R=lA/p R=p+l/A HintResistance and length of wire directly proportional.77). What happens to value of resistance with increase in value of length in resistivity formula? Increases Decreases Constant Zero HintThe value of resistance and length directly proportional.78). Which of the following are the advantages of resistive type transducer? Provides quick results Available in different sizes Accurate value All the above Hint3 advantages.79). Which of the following are the disadvantages of resistive type transducer? High power dissipation High SNR value High distortion All the above Hint3 disadvantages.80). Abbreviate LVDT type transducer? Linear Variable Displacement Transformer Linear Value Displacement Transformer Linear Variable Display Transformer Linear Variable Displacement Type HintAn electromechanical transducer.81). Which of the following are the applications of thermocouple transducer? Gas turbines Diesel engines Kilns All the above HintIndustrial applications.82). _____ effect defines the creation of electromotive force in thermocouple transducer? Seebeck effect Hall effect Demagnetization Magnetization HintA phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the two substances.83). Which of the following are the substances used in thermocouple transducers? Nickle Alloy Chromel Iron All the above Hint3 substances.84). A chromel-constantan type thermocouple transducers is also called? Nickle alloy Type E Type K All the above HintUsed in both oxidizing and reducing atmospheres to measure temperatures up to 350°C.85). Which of the following is the value of output obtained from type E type thermocouple transducers? 68 ⴏV/oC 70 ⴏV/oC 72 ⴏV/oC 50 ⴏV/oC HintMinimum value.86). Which of the following is the wide range value of thermocouple transducers? -270oC to +740oC -110oC to +140oC -170oC to +740oC -270oC to +640oC HintMaximum range.87). Which of the following is the narrow range value of thermocouple transducers? -270oC to +740oC -110oC to +140oC -170oC to +740oC -270oC to +640oC HintMinimum range.88). A iron-constantan type thermocouple transducers is also called? Nickle alloy Type E Type K Type J HintType that has smaller temperature range and a shorter lifespan at higher temperatures.89). Which of the following the restricted range of type J type thermocouple transducers? -40oC to+750oC +40oC to+750oC -40oC to+650oC -400oC to+750oC HintMaximum range.90). Which of the following is the higher sensitivity value of J type thermocouple transducers? 50 ⴏV/oC 115 ⴏV/oC 40 ⴏV/oC 150 ⴏV/oC HintMid value.91). Which of the following is the curie point value of J type thermocouple transducers? 770oC 600oC 650oC 690oC HintMaximum value.92). A chromel-alumel type thermocouple transducers is also called? Nickle alloy Type E Type K Type J HintIt consist of positive leg which is non-magnetic and negative leg which is magnetic.93). Which of the following is the sensitivity of approximate value of chromel-alumel type thermocouple transducers? 41 ⴏV/oC 51 ⴏV/oC 31 ⴏV/oC 21 ⴏV/oC HintNear to maximum value.94). Type M type thermocouple transducers comprises of ______ components? Nickle Cobalt Molybdenum All the above Hint3 components.95). Which of the following is the upper temperature limit of type M thermocouple transducers? 1000oC 1200oC 1400oC 1500oC HintNear to maximum value.96). A Nicrosil-Nisil type thermocouple transducers is also called? Type N Type E Type K Type J HintA thermocouples are used in atmospheres with inert pressures.97). Which of the following is the temperature range of Nicrosil-Nisil type thermocouple transducers? -270oC to +1300oC -270oC to +1400oC -170oC to +1300oC -270oC to +1800oC HintUp to odd range value.98). A copper-constantan type thermocouple transducers is also called? Type-N Type E Type T Type J HintA very stable thermocouple and is often used in extremely low temperature applications.99). Which of the following is the temperature range of B type thermocouple transducers? 0 to 42oC 0 to 50oC 10 to 50oC 10 to 100oC HintMinimum range.100). Which of the following is the temperature range of R type thermocouple transducers? 0 to 42oC 0 to 1600oC 10 to 50oC 10 to 100oC HintMaximum range. Please fill in the comment box below. Time is Up! Time's up
