Ultrasonic Sensor Question & Answers December 6, 2021 By WatElectronics This article lists 100 Ultrasonic Sensor MCQs for engineering students. All the Ultrasonic 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 Ultrasonic Sensor. A sensor is a device that senses physical quantity within a bounded region and converts the quantity into electrical form. They are classified based on the physical quantity being measured such as light sensor, ultrasonic sensor, sound sensor, and more. An ultrasonic sensor is a sensor that senses or generates ultrasonic-based energy. It is also called an ultrasonic transducer. The block diagram of the ultrasonic sensor consists of a transmitter, receiver, and trans-receiver. Where a transmitter is placed at sender's end, a receiver at recipient end, and a transceiver can be placed either of the ends. These sensors are used for detecting ceramic, plastic, and water level detection. They work on the principle of sound waves at 20Hz to 20KHz of frequency. They mostly follow the ultrasonic-based method for employing longitudinal waves. HC-SR04 is a class of ultrasonic sensors that operates similarly. They provide benefits in terms of generating accurate results, fast detection properties, and are suitable for parallel surfaces. But limited in terms of inflexible scanning, limited distance, and suitable for the parallel surface. They are commonly used in locating gaps, cracks and measuring thickness. 1). A device that detects any physical changes with in its environment is called____? Sensor Radar Sonar All the above None Hint 2). A sensor is also called ______? Transduces Detector Sonar Both a and b None Hint Read more about Transducer. 3). A sensor is classified based on_____? Sensitivity factor Physical medium Distance All the above None Hint 4). A sensor is a ____? Module Machine Sub system All the above None Hint 5). A sensor that senses or generates ultrasonic based energy is called_____? Ultrasonic sensor Sound sensor Doppler sensor All the above None Hint 6). A ultra sonic sensor is classified in to ____ types? 2 3 4 5 None Hint 7). Which of the following component is of sensor is placed near senders ends in digital communication? Transmitter Receiver Speaker Both a and b None Hint 8). Which of the following component is of sensor is placed near receivers ends in digital communication? Transmitter Receiver Speaker Both c and b None Hint 9). Which of the following is the function of sensors transmitters? Transmits signal Broadcasts signals Receives signal Both a and b None Hint 10). Which of the following is the function of sensors receiver? Transmits signal Broadcasts signals Receives signal Both a and b None Hint 11). Which of the following component of sensor has the capability to perform transmision and reception? Transmitter Receiver Trans-receiver All the above None Hint 12). Which of the following component of ultrasonic sensor converts digital signal to ultrasound? Transmitter Receiver Trans-receiver All the above None Hint 13). Which of the following component of ultrasonic sensor converts ultrasound to digital signal? Transmitter Receiver Trans-receiver All the above None Hint 14). Which of the following type of ultrasonic transducer is used in medical industry? Linear array transducer Non linear transducer Sonar transducer All the above None Hint 15). Which of the following is the purpose of ultrasonic sensor? Detects transparent tracks Performs water level based detection Detects Metals All the above None Hint Read more about Water Level Indicator. 16). A sensor component is based on ___ subject? Physics Chemistry Maths All the above None Hint 17). A ultrasonic sensor uses ____ wave? EM Sound UV All the above None Hint 18). On which of the following principle do ultrasonic sensor depends on? Sound wave Air Distance Light None Hint 19). A sound wave depends on ____ properties? Medium Velocity Time All the above None Hint 20). Which of the following are the properties of sound waves observed in an ultrasonic sensor? Higher frequency reflects from walls Generates different echo based patters Propagates based on medium All the above None Hint 21). Which of the following is the frequency range of sound waves? 20HZ to 20KHZ 200Hz to 200KHZ 2Khz to 20GHz 20Hz to 20GHz None Hint 22). Which of the following is the frequency range of ultrasonic detection? 100 KHz to 50MHz 50 KHz to 100 KHz 100 GHz to 200 GHz 10 KHz to 100 MHz None Hint 23). Which of the following is the formula of velocity of ultrasonic sensors? W=CT W=C/F W=F/C Both a and b None Hint 24). Which of the following type of waves do a ultrasonic sensor examines? Shear waves Longitudinal wave Latitudes waves Both a and b None Hint 25). Which of the following type of sound wave is defined to be a compressed wave whose particle motion is in same direction of wave propagation? Shear waves Longitudinal wave Latitudes waves Both a and b None Hint Ultrasonic Sensor Interview Questions and Answers 26). Which of the following type of sound wave is defined to be a wave in which motion of particle perpendicular to propagation direction? Shear waves Longitudinal wave Latitudes waves Both a and b None Hint 27). Which of the following type of sound waves frequency do ultrasonic sensor produces? High Low Constant Both a and b None Hint 28). Which of the following is the formula for thickness of material? Material Sound Velocity * Time of Flight Material Sound Velocity / Time of Flight Material Sound Velocity + Time of Flight Material Sound Velocity - Time of Flight None Hint 29). On which of the following principle do ultrasonic sensor works on? Radar Sonar Light All the above None Hint 30). Which of the following are the commonly used transducers? Angle Beam Delay Line Contact All the above None Hint 31). Which of the following are the applications of contact based transducers? Locating gaps Locating cracks Measure thickness All the above None Hint 32). Which of the following are the applications of angle beam transducers? Modes converter Employs reflection principle Generates longitudinal waves All the above None Hint 33). Which of the following is the advantages of immersion transducers with respect to contact transducer? Minimizes sensitivity variation Minimizes scan time Enhances sensitivity to small reflectors All the above None Hint 34). Which of the following energy is the input to ultrasonic sensor? Mechanical Sound Hydra Electric None Hint 35). Which of the following is the input voltage provided to ultrasonic sensor? 1V 3V 5V 12V None Hint 36). Which of the following is the primary application of ultrasonic sensor? Proxymity sensor Motion sensor Radar Both a and b None Hint 37). On which of the following properties do proximity sensors do not allow ultrasonic sensor to be susceptible? Airbone particles Smoke Gas All the above None Hint 38). Which of the following is the function of ultrasonic level sensor when place in a water tank? Detect Monitor Regulate All the above None Hint 39). On which of the following factors do an ultrasonic sensor do not depends on? Size Area Shape Both a and c None Hint 40). An ultrasonic sensor has ___ number of pins? 2 3 1 4 None Hint 41). In an Arduino based application of ultrasonic sensor, which of the following mode is set to enable ultrasonic sensor? Analog Binary TDM All the above None Hint 42). Which of the following is the formula for distance of HC SR04 type ultrasonic sensor? Echo Pulse Width / 58 Echo Pulse Width/ 148 Echo Pulse width / 30 Both a and b None Hint 43). Which of the following application of ultrasonic sensor measures sea level? Tank level Tide guage Anemometer All the above None Hint 44). Which of the following application of ultrasonic sensor measures both vertical and horizontal components of wind speed? Tank level Tide guage Anemometer All the above None Hint 45). Which of the following application of ultrasonic application has more durability factor? Ultrasonic anemometer Cup anemometer Vane anemometer All the above None Hint 46). Which of the following application of ultrasonic sensor measures winds temperature? Tank level Tide guage Anemometer All the above None Hint Read more about Anemometer. 47). Which of the following application of ultrasonic sensor track live data with in its environment and display on screen on a remote monitoring system? Tank level Tide guage Anemometer Drones None Hint 48). Which of the following is result of ultrasonic sensor on supplying voltage of 25V? Damage Sensor operates with high speed Sensor generates output All the above None Hint 49). Which of the following factors are affected while using ultrasonic sensor? Dust Smoke Targets distance All the above None Hint 50). Which of the following is the minimum current value required for an ultrasonic sensor to operate? 1mA 1.5mA 15mA 115mA None Hint Ultrasonic Sensor Important Questions for Interviews 51). Which of the following are the components of ultrasonic sensors applications? Micro controller Bridge rectifier Transformer All the above None Hint Read more about Transformer. 52). Which of the following type of micro controller is used in an ultrasonic sensors applications circuit? 8086 8088 8051 All the above None Hint Read more about 8051. 53). How many pins do 8051 micro controller consist of? 20 30 40 50 None Hint 54). In how many ways a ultrasonic sensor is available? 2 3 4 5 None Hint 55). Which of the following is the range of HC-SR04 type ultrasonic sensor? 2 to 40cm 2 to 20cm 2 to 30cm 2 to 100cm None Hint 56). A HC-SR04 type ultrasonic sensor provides ____ type of measurement function? Contact Non contact Radiation Both b and c None Hint 57). How much frequency do a HC- SR04 type ultrasonic sensor transmits? 40KHz 50KHz 30KHz 20KHz None Hint 58). Which of the following is the supply voltage for HC- SR04 type ultrasonic sensor? 2V 3V 4V 5V None Hint 59). Which of the following are the ways that supply is provided to HC-SR04 type ultrasonic sensor? Trigger Echo based pulse Ground All the above None Hint 60). Which of the following is the measuring angle of HC-SR04 type ultrasonic sensor? 10 degrees 15 degrees 20 degrees 30 degrees None Hint 61). What is value of trigger input signal applied to HC-SR04 type ultrasonic sensor? 5 micro sec 10 micro sec 20 micro sec 15 micro sec None Hint 62). Which of the following are the limitations of HC-SR04 type ultrasonic sensor? Cannot be connected directly Cannot measures area below 0.5 sq meter May effect resulting measurement All the above None Hint 63). Which of the following is the accuracy data obtained from ultrasonic sensor? 0.3cm 0.2cm 0.4cm 0.5cm None Hint 64). Which of the following type of TTL pulse is provided to ultrasonic sensor? Positive Negative Zero All the above None Hint 65). Which of the following is the major benefit of ultrasonic sensor? Excellent suppressing factor Reflection factor Covers more distance All the above None Hint 66). Which of the following property of ultrasonic sensor defines that it does not scratch the detecting object? Non contact detection Objects over large area Influence detection All the above None Hint 67). Which of the following type of substances are used in an ultrasonic sensor components? Piezoelectric ceramics Quartz Silicon All the above None Hint 68). Which of the following type of force do a piezoelectric ceramics generate? Electric Electromechanical Mechanic All the above None Hint 69). How many sensing modes do a ultrasonic sensor has? 2 3 4 5 None Hint 70). Which of the following are the examples of ultrasonic sensing modes models? E4E2 E4C-UDA E4PA-N All the above None Hint 71). Which of the following ultrasonic sensing modes models detects the attenuation of ultrasonic beam? E4E2 E4C-UDA E4PA-N All the above None Hint 72). Which of the following ultrasonic sensing modes models detects the reflected ultrasonic beam from the object present with in the sensing distance range set with the distance adjuster? E4E2 E4C-UDA E4PA-N All the above None Hint 73). Which of the following ultrasonic sensing modes models detects the reflected ultrasonic beam from the object present in sensing range set with distance selector? E4E2 E4C-UDA E4PA-N All the above None Hint 74). Which of the following is the examples of surface objects, when an ultrasonic wave reflection from a flat surface? Boxes Humans Bottles All the above None Hint 75). Which of the following is the examples of surface objects, when an ultrasonic wave reflection from a flat surface? Boxes Humans Bottles All the above None Hint Ultrasonic Sensor Quiz Questions and Answers. 76). Which of the following is the examples of Powders objects, when an ultrasonic wave reflection from a flat surface? Boxes Humans Plastics All the above None Hint 77). Based on which of the following parameter do the ultrasonic sensors reflection beam varies? Shape Size Distance All the above None Hint 78). Which of the following type of objects have maximum reflection when an ultrasonic wave hits the object? Powders Flat surfaces Cylindrical objects All the above None Hint 79). Which of the following devices converts one energy in to other energy? Transducer Capacitor Rectifier Amplifier None Hint Read more about Transducer. 80). Which of the following are the properties of a transducer? Automation Measurement Control systems All the above None Hint 81). A transducer which transduces physical type quantity in to electric type quantity is called? Mechanical transducer Electric transducer Chemical transducer All the above None Hint 82). Which of the following are the examples of transducers? Thermocouple Ultrasonic sensors Actuators All the above None Hint 83). Which of the following are the properties of a transducer? Dynamic range Repeatability Noise All the above None Hint 84). Which of the following characteristic of transducer defines ratio between smallest and largest amplitudes signal? Dynamic range Repeatability Noise All the above None Hint 85). A greater dynamic based range of a transducer are more ______ ? Sensitive Breakdown Tangential All the above None Hint 86). When a transducer generates identical output stimulated by same input is called___? Repeatability Noise Hysteresis Range None Hint 87). Which of the following component do HC-SR04 type ultrasonic sensor uses to determine objects distance from itself? SONAR Radar Light All the above None Hint 88). How many modules do an HC-SR04 type ultrasonic sensor has? 1 2 3 4 None Hint 89). Which of the following are the applications of HC-SR04 type ultrasonic sensor? Sonar Humidifiers Burglar alarms All the above None Hint 90). On which of the following type of wave do HC-SR04 type ultrasonic sensor work? Sound Air Liquid All the above None Hint 91). Which of the following is the formula for calculating the distance of object while using an ultrasonic sensor? S=Vt/2 S=V/t S=V+T/2 All the above None Hint 92). Distance is measured in terms of _______ units? Meters Kg Grams All the above None Hint 93). Time is measured in terms of ___________? Seconds Miliseconds Hours All the above None Hint 94). Which of the following are the advantages of ultrasonic sensor? Accurate Fast detection property Suitable for parallel surface All the above None Hint 95). Which of the following are the limitations of ultrasonic sensor? Inflexible scanning Limited distance Does not detects corroded materials All the above None Hint 96). Which of the following is the frequency of ultrasonic waves? 20Kilohertz 20000 Hertz 30KHertz Both a and b None Hint 97). Which of the following scientist invented ultrasonic sensor? Ian Donald Tom Brown Charles Both a and b None Hint 98). In which year ultrasonic sensor in medical field was used in India? 1980 1970 1960 1990 None Hint 99). Which of the following are the negative effects of ultrasonic sensor on human life? Ear damage Cancer Skin disease All the above None Hint 100). What if the decibel value of ultrasonic sensor cause ear damage? 100 125 120 155 None Hint Time's up
