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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____?
HintDevice that senses physical quantity.
2). A sensor is also called ______?
HintA device which represents one quantity to other.
Read more about Transducer.
3). A sensor is classified based on_____?
Hint3 qualities.
4). A sensor is a ____?
HintOther names for system.
5). A sensor that senses or generates ultrasonic based energy is called_____?
HintOperates at 500KHz.
6). A ultra sonic sensor is classified in to ____ types?
Hint3 components at sender, receiver and intermediate.
7). Which of the following component is of sensor is placed near senders ends in digital communication?
HintA device that responsible for sending data.
8). Which of the following component is of sensor is placed near receivers ends in digital communication?
HintA device responsible for accumulating data.
9). Which of the following is the function of sensors transmitters?
HintDevice that sends data to receiver and other communication components.
10). Which of the following is the function of sensors receiver?
HintThe device that accumulates data.
11). Which of the following component of sensor has the capability to perform transmision and reception?
HintDual function communication device.
12). Which of the following component of ultrasonic sensor converts digital signal to ultrasound?
HintInput component of digital communication.
13). Which of the following component of ultrasonic sensor converts ultrasound to digital signal?
HintDevice at reception end.
14). Which of the following type of ultrasonic transducer is used in medical industry?
HintA ultrasonic transducer with zero vriation output wave.
15). Which of the following is the purpose of ultrasonic sensor?
Hint3 main functions.
Read more about Water Level Indicator.
16). A sensor component is based on ___ subject?
HintA subject that described parameters can be accessed in real time.
17). A ultrasonic sensor uses ____ wave?
HintA quantity measured in dB.
18). On which of the following principle do ultrasonic sensor depends on?
HintQuantity measured in dB.
19). A sound wave depends on ____ properties?
HintPhysical properties.
20). Which of the following are the properties of sound waves observed in an ultrasonic sensor?
HintMaximum properties.
21). Which of the following is the frequency range of sound waves?
HintMinimum value.
22). Which of the following is the frequency range of ultrasonic detection?
HintRanges in KHz to MHz.
23). Which of the following is the formula of velocity of ultrasonic sensors?
HintProduct of terms.
24). Which of the following type of waves do a ultrasonic sensor examines?
HintWaves measured in horizontal direction.
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?
HintWaves measured in vertical direction.

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?
HintShear waves s defined to be a wave in which motion of particle perpendicular to propagation direction..
27). Which of the following type of sound waves frequency do ultrasonic sensor produces?
HintMaximum value.
28). Which of the following is the formula for thickness of material?
HintProduct of terms.
29). On which of the following principle do ultrasonic sensor works on?
HintA system that radiates energy.
30). Which of the following are the commonly used transducers?
HintTransducers that measures physical quantities of light.
31). Which of the following are the applications of contact based transducers?
HintMechanical appliance parameters.
32). Which of the following are the applications of angle beam transducers?
HintBeam parameters.
33). Which of the following is the advantages of immersion transducers with respect to contact transducer?
HintMaximum benefits in terms of physical measuring quantities.
34). Which of the following energy is the input to ultrasonic sensor?
HintEnergy that supplies power in terms of Watts.
35). Which of the following is the input voltage provided to ultrasonic sensor?
HintOdd value of voltage.
36). Which of the following is the primary application of ultrasonic sensor?
HintDetermines proxy of object.
37). On which of the following properties do proximity sensors do not allow ultrasonic sensor to be susceptible?
HintAir related particles.
38). Which of the following is the function of ultrasonic level sensor when place in a water tank?
HintPerform 3 main tasks.
39). On which of the following factors do an ultrasonic sensor do not depends on?
HintPhysical parameters.
40). An ultrasonic sensor has ___ number of pins?
HintEven number of pins.
41). In an Arduino based application of ultrasonic sensor, which of the following mode is set to enable ultrasonic sensor?
HintRepresented in 0's and 1's.
42). Which of the following is the formula for distance of HC SR04 type ultrasonic sensor?
HintFormula.
43). Which of the following application of ultrasonic sensor measures sea level?
HintSea water measuring based guage.
44). Which of the following application of ultrasonic sensor measures both vertical and horizontal components of wind speed?
HintAir based measuring device.
45). Which of the following application of ultrasonic application has more durability factor?
HintA device that uses ultrasound.
46). Which of the following application of ultrasonic sensor measures winds temperature?
HintDevice that measures both horizontal and vertical direction of wind.
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?
HintRemote control device with camera.
48). Which of the following is result of ultrasonic sensor on supplying voltage of 25V?
HintSensor breaks down.
49). Which of the following factors are affected while using ultrasonic sensor?
HintQuantity that measure object away from sensor.
50). Which of the following is the minimum current value required for an ultrasonic sensor to operate?
HintMinimum value.

Ultrasonic Sensor Important Questions for Interviews

51). Which of the following are the components of ultrasonic sensors applications?
HintPassive electric components.
Read more about Transformer.
52). Which of the following type of micro controller is used in an ultrasonic sensors applications circuit?
HintIs a 40 pin DIP.
Read more about 8051.
53). How many pins do 8051 micro controller consist of?
Hint20*2=?
54). In how many ways a ultrasonic sensor is available?
HintEven number of ways,
55). Which of the following is the range of HC-SR04 type ultrasonic sensor?
HintMinimum value.
56). A HC-SR04 type ultrasonic sensor provides ____ type of measurement function?
HintRemote type radiation.
57). How much frequency do a HC- SR04 type ultrasonic sensor transmits?
HintNear to maximum value.
58). Which of the following is the supply voltage for HC- SR04 type ultrasonic sensor?
HintOdd value.
59). Which of the following are the ways that supply is provided to HC-SR04 type ultrasonic sensor?
HintFunctioning pins.
60). Which of the following is the measuring angle of HC-SR04 type ultrasonic sensor?
HintOdd value.
61). What is value of trigger input signal applied to HC-SR04 type ultrasonic sensor?
HintEven value.
62). Which of the following are the limitations of HC-SR04 type ultrasonic sensor?
HintBased on measuring quntities.
63). Which of the following is the accuracy data obtained from ultrasonic sensor?
HintOdd value.
64). Which of the following type of TTL pulse is provided to ultrasonic sensor?
HintNon inverting values.
65). Which of the following is the major benefit of ultrasonic sensor?
HintParameters measuring qualities.
66). Which of the following property of ultrasonic sensor defines that it does not scratch the detecting object?
HintRemote type radiation.
67). Which of the following type of substances are used in an ultrasonic sensor components?
HintA crystal component.
68). Which of the following type of force do a piezoelectric ceramics generate?
HintElectric + Mechanic.
69). How many sensing modes do a ultrasonic sensor has?
HintEven number.
70). Which of the following are the examples of ultrasonic sensing modes models?
HintAll the E-series.
71). Which of the following ultrasonic sensing modes models detects the attenuation of ultrasonic beam?
HintHas NPN open collector.
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?
HintIt is a ylindrical Reflective Ultrasonic Sensor .
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?
HintIt is not affected by the color of objects.
74). Which of the following is the examples of surface objects, when an ultrasonic wave reflection from a flat surface?
HintShape of cube.
75). Which of the following is the examples of surface objects, when an ultrasonic wave reflection from a flat surface?
HintLiving organisms.

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?
HintDisposable objects.
77). Based on which of the following parameter do the ultrasonic sensors reflection beam varies?
HintDimensions.
78). Which of the following type of objects have maximum reflection when an ultrasonic wave hits the object?
HintPlane surface.
79). Which of the following devices converts one energy in to other energy?
HintTransformer device.
Read more about Transducer.
80). Which of the following are the properties of a transducer?
HintAutomatic performance.
81). A transducer which transduces physical type quantity in to electric type quantity is called?
HintAlso called Powered transducer.
82). Which of the following are the examples of transducers?
HintPassive components.
83). Which of the following are the properties of a transducer?
HintPhysical parameters.
84). Which of the following characteristic of transducer defines ratio between smallest and largest amplitudes signal?
HintVariable range.
85). A greater dynamic based range of a transducer are more ______ ?
HintSensitivity function.
86). When a transducer generates identical output stimulated by same input is called___?
HintOccurs in regular intervals.
87). Which of the following component do HC-SR04 type ultrasonic sensor uses to determine objects distance from itself?
HintOperates even in water.
88). How many modules do an HC-SR04 type ultrasonic sensor has?
HintEven number.
89). Which of the following are the applications of HC-SR04 type ultrasonic sensor?
HintDetectors and alarms.
90). On which of the following type of wave do HC-SR04 type ultrasonic sensor work?
HintIt is a acoustic wave.
91). Which of the following is the formula for calculating the distance of object while using an ultrasonic sensor?
HintAverage.
92). Distance is measured in terms of _______ units?
HintThe basic unit of length.
93). Time is measured in terms of ___________?
HintSI units of time.
94). Which of the following are the advantages of ultrasonic sensor?
HintPhysical parameters.
95). Which of the following are the limitations of ultrasonic sensor?
HintSensors performance limitation.
96). Which of the following is the frequency of ultrasonic waves?
HintMaximum value.
97). Which of the following scientist invented ultrasonic sensor?
Hint2 Engineers.
98). In which year ultrasonic sensor in medical field was used in India?
HintLeap year.
99). Which of the following are the negative effects of ultrasonic sensor on human life?
HintListening disability,
100). What if the decibel value of ultrasonic sensor cause ear damage?
HintOdd value.
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