Transducer Question & Answers February 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 None Hint 2). Which of the following applications systems are deployed with transducers? Automations Measurements Control systems All the above None Hint 3). Which of the following might be the form of input applied to transducers? Light Force Energy All the above None Hint 4). A process of converting energy in one form to another form is called ______? Transduction Reflection Rectification Deflection None Hint 5). Which of the following is the applications of transducers? Microphones Loudspeakers Antenna sensor All the above None Hint 6). How many basic conditions are used by a transducer operation? 2 3 4 5 None Hint 7). _____ condition in transducer is defined as ratio of maximum and minimum signal amplitude? Dynamic range Repeatability SNR Hysteresis None Hint 8). A transducer with _____ value of dynamic range has better sensitivity factor? Zero Maximum Minimum Constant None Hint 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 None Hint 10). ____ is defined as distortion in signal? Noise Wavelength Frequency Bandwidth None Hint 11). ____ condition in transducer is defined as generation of same quantity of output with respect to input? Dynamic range Repeatability SNR Hysteresis None Hint 12). Noise in transducer is added due to _____ reason? Thermal action Electrons doping Cooling substance All the above None Hint 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 None Hint 14). Nosie is measured in terms of _____? Decibels Hertz Centimeters Hertz/meter None Hint 15). ____ condition in transducer is defined as output of a transducer depends on both present and previous input ? Dynamic range Repeatability SNR Hysteresis None Hint 16). A transducer is classified in to ____ number of types? 2 3 4 5 None Hint 17). Which of the following type of transducer requires power for its operation? Active Passive Source dependent Both b and c None Hint 18). Which of the following type of transducer does not requires power for its operation? Active Passive Source dependent Both b and c None Hint 19). Which of the following is the working principle of active type transducer? Energy conversion Energy dissipation Load pressure All the above None Hint 20). Which of the following is an example of active type transducer? Thermocouple Photocell LDR All the above None Hint 21). The output generate from active type transducer is _____ form? Electric Capacitance Resistance Both b and c None Hint 22). The output generated from passive type transducer is _____ form? Electric Capacitance Resistance Both b and c None Hint 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 None Hint 24). An active type non-electrical based transducer is classified in to ____ types? 2 3 4 5 None Hint 25). Which of the following is the input provided to piezo electric transducer? Temperature Pressure Light All the above None Hint Transducer Interview Questions and Answers 26). Which of the following substances exhibits piezo electric effect? Tourmaline Rochelle salts Quartz All the above None Hint Read more about the Crystal Oscillator. 27). A Quartz substance has ____ quantity of piezo electric effect? High Low Moderate Zero None Hint 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 None Hint 29). Which of the following are the components of Quartz transducer? Quartz crystal Force summing member Base All the above None Hint 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 None Hint 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 None Hint 32). Which of the following is the input quantity provided to photoelectric type transducer? Pressure Light Sound Air None Hint 33). Which of the following are the components of a photoelectric transducer? Light Resistor Battery All the above None Hint 34). Which of the following are the components present in photoelectric transducers bulb? Anode Cathode Capacitor Both a and b None Hint 35). On which of the following component incidence of light in photoelectric transducers generates electrons? Anode Cathode Non-inverting All the above None Hint 36). To which of the following terminal in photoelectric transducers electrons gets attracted to generate current? Anode Cathode Inverting All the above None Hint 37). Which of the following is the sensitivity formula of photoelectric transducers? S=I/i S=I+i S=I-i S=I*i None Hint 38). Which of the following is the input applied to thermo electric transducer? Pressure Light Temperature Air None Hint 39). A thermo electric transducer is classified in to ____ types? 1 2 3 4 None Hint 40). In which of the following form a thermistor type transducer generates output? Analog Digital Continuous Both a and b None Hint 41). A thermistor transducer has ____ number of terminals? 1 2 3 4 None Hint 42). A thermistor transducer is designed with ____ substance? Semiconductor Insulator Conductor All the above None Hint Read more about Semiconductor Types. 43). The value of thermistor transducers temperature coefficient is _____? Positive Negative Zero Infinite None Hint Read more about Thermistor. 44). The value of resistance _____ with increase in temperature of thermistor transducers? Increases Decreases Constant Zero None Hint 45). A thermistor transducers is also called ______? Thermal resistor Thermal conductor Thermal insulator All the above None Hint 46). Which of the following are the benefits of thermistor transducers? Budget friendly Accurate measurement Robust All the above None Hint 47). Which of the following are the applications of thermistor transducers? Microwave ovens Fridge Batteries All the above None Hint 48). The value of resistance of a thermistor device can be measured using ____ device? Ohmmeter Potentiometer Barometer Galvanometer None Hint 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 None Hint 50). Thermistors are classified in to ____ types? 2 3 4 5 None Hint Transducer MCQs for Exams 51). In a Positive Temperature Coefficient thermistor, increase in temperature ____ the value of device resistance? Increases Decreases Constant Zero None Hint 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 None Hint 53). Which of the following is the advantage of thermistor transducer? Quick response Stable output Less noise Both a and b None Hint 54). Which of the following type of transducer joins 2 different metals? Thermocouple Thermistor Bimetalic strip Both a and c None Hint 55). At gradient in temperature of thermistor transducer ____ is generated at output? EMF Current Voltage Temperature None Hint 56). Which of the following is the equation of thermistor transducer emf ____? e=T1-T2 e=T1+T2 e=T1*T2 e=T1/T2 None Hint 57). Temperature is measured in terms of ____ units? Centigrade Celsius Henrys Both a and b None Hint 58). Which of the following properties a capacitive type transducer measures? Displacement Pressure Temperature All the above None Hint 59). Which of the following is the working principle of capacitive type transducer? Variable capacitance Constant capacitance Variable power Variable temperature None Hint 60). How many number of metal plates a capacitive type transducer comprises of? 1 2 3 4 None Hint 61). Which of the following is the dielectric medium form used in capacitive type transducer? Air Gas Liquid All the above None Hint 62). In how many modes do a capacitive type transducer works? 1 2 3 4 None Hint 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 None Hint 64). Which of the following are the advantages of a capacitive type transducer? High sensitive High resolution Unaffected by magnetic fields All the above None Hint 65). Which of the following is the accuracy percent of capacitive type transducer? 0.005% 0.01% 0.1% 0.5% None Hint 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 None Hint 67). A complex based measuring device is added at the output of capacitive type transducer to measure _____ parameter? Temperature Resistance Impedance Inductance None Hint 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 None Hint 69). ____ component is responsible for controlling the mechanisms of sensor? Actuator Converter Diverter All the above None Hint 70). Which of the following are the examples of bidirectional type transducer? Radio receiver Voice coils Dynamic microphones All the above None Hint Read more about Wireless Radio Frequency Technology. 71). A photo-conductive mode in photo transducer is ___ biased? Forward Reverse Zero Both a and b None Hint 72). Which of the following are the examples of passive transducer? Resistive transducer Inductive transducer Capacitive transducer All the above None Hint 73). A resistive type transducer is a ____ device? Electric Mechanic Electronic Both b and c None Hint 74). Which of the following are the examples of resistive type transducer? LDR Thermistor transducer Resistive pressure transducer All the above None Hint 75). A resistive type transducer is used for calculating ____? Temperature Displacement Force All the above None Hint 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 None Hint 77). What happens to value of resistance with increase in value of length in resistivity formula? Increases Decreases Constant Zero None Hint 78). Which of the following are the advantages of resistive type transducer? Provides quick results Available in different sizes Accurate value All the above None Hint 79). Which of the following are the disadvantages of resistive type transducer? High power dissipation High SNR value High distortion All the above None Hint 80). Abbreviate LVDT type transducer? Linear Variable Displacement Transformer Linear Value Displacement Transformer Linear Variable Display Transformer Linear Variable Displacement Type None Hint 81). Which of the following are the applications of thermocouple transducer? Gas turbines Diesel engines Kilns All the above None Hint 82). _____ effect defines the creation of electromotive force in thermocouple transducer? Seebeck effect Hall effect Demagnetization Magnetization None Hint 83). Which of the following are the substances used in thermocouple transducers? Nickle Alloy Chromel Iron All the above None Hint 84). A chromel-constantan type thermocouple transducers is also called? Nickle alloy Type E Type K All the above None Hint 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 None Hint 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 None Hint 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 None Hint 88). A iron-constantan type thermocouple transducers is also called? Nickle alloy Type E Type K Type J None Hint 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 None Hint 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 None Hint 91). Which of the following is the curie point value of J type thermocouple transducers? 770oC 600oC 650oC 690oC None Hint 92). A chromel-alumel type thermocouple transducers is also called? Nickle alloy Type E Type K Type J None Hint 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 None Hint 94). Type M type thermocouple transducers comprises of ______ components? Nickle Cobalt Molybdenum All the above None Hint 95). Which of the following is the upper temperature limit of type M thermocouple transducers? 1000oC 1200oC 1400oC 1500oC None Hint 96). A Nicrosil-Nisil type thermocouple transducers is also called? Type N Type E Type K Type J None Hint 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 None Hint 98). A copper-constantan type thermocouple transducers is also called? Type-N Type E Type T Type J None Hint 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 None Hint 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 None Hint Please fill in the comment box below. Time's up
