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Piezoelectric Transducer Question & Answers

September 13, 2021 By Wat Electrical Leave a Comment

This article lists 100+ Piezoelectric Transducer MCQs for engineering students. All the Piezoelectric 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 Piezoelectric Transducer.

A piezoelectric transducer or a piezoelectric sensor is one kind of device that measures different changes within the pressure, acceleration, temperature, force, or strain by using the piezoelectric effect to change the energy into an electrical charge.

The term “piezoelectric” is nothing but the electricity that can be generated through pressure. The best example of the natural piezoelectric crystal is the Quartz whereas phosphate, ammonium dehydration, Rochelle salts, lithium sulfate are the man-made type crystals.

The applications of piezoelectric transducers mainly include microphones, medical diagnostics. Infertility treatment, inkjet printers, and many more.

1). The property of materials in which the application of mechanical stress generates electricity is called------------
HintThe mechanical stress is generated in Piezoelectricity
2). Piezoelectric materials are-----
HintPiezoelectric materials are available naturally
3). Naturally available piezoelectric among the below
HintNaturally available piezoelectric materials are Quartz, rubber, etc
4). Artificially manufactured piezoelectric among the below is
HintArtificial piezoelectric material is Lithium niobate
5). Piezoelectric materials used as transducers should have-----
HintThey don t have any properties
6). The faces of piezoelectric materials are coated with-------while using as transducers
HintPiezoelectric materials are covered with Au
7). In piezoelectric transducer, the polarity of produced charge depends upon----
HintThe polarity mainly depends on the direction of charge
8). On piezoelectric material, stress is applied as
HintCompressive and tensile stresses are applied.
9). The orientation of crystal effects the---
HintThe crystal orientation effects the charge
10). The amount of charge generated in the longitudinal arrangement of a crystal is --------the amount generated in the transverse arrangement
HintThe charge generated in the longitudinal arrangement of a crystal is smaller
11). Ultrasonic piezoelectric transducer works on the principle of
HintUltrasonic piezoelectric transducer works on reverse piezoelectric effect
12). In converse piezoelectric effect--------is produced when----------is applied.
HintThe output of converse piezoelectric effect is stress
13). In ultrasonic piezoelectric transducer, resonance occurs when the frequency of an oscillator is equal to the natural frequency of----------
HintIt is one kind of piezoelectric material
14). Piezoelectric materials cannot measure
HintPiezoelectric materials cannot measure stable values
15). To measure force, stress, vibrations ------is used
HintIt is one kind of electric sensor
16). Piezoelectric transducers are------ transducers
HintAn alternate name is active transducer
17). There are -------- natural piezoelectric crystal classes
HintNaturally available piezoelectric crystal classes are twenty
18). Synthetic piezoelectric materials are----------
HintSynthetic piezoelectric materials are ceramics, polymers, quartz.
19). Quartz ‘s mechanical quality factor is
HintThe quality factor of Quartz is above 100000
20). The AT-cut quartz is used in
HintAT-cut quartz is used in electronics display devices
21). The piezoelectric with high electromechanical coupling
Hintpiezoelectric with high electromechanical coupling is LiNbO3
22). Piezoelectric material used for Langevin vibrators is
HintThe chemical formula of this material is BTO
23). PZT-5 is formed by doping PZT with
HintThe PZT-5 can be formed with donar ions
24). For ultrasonic measuring the piezoelectric used is
HintLead Titanate is used for ultrasonic measuring
25). Frequently used piezoelectric as actuators are
HintPiezoelectric polymers are used as actuators

Piezoelectric Transducer Interview Questions & Answers

26). Mostly opted piezoelectric for microphones are
HintPiezoelectric polymers are used for microphones
27). Piezoelectric used for underwater sonar are
HintPiezoelectric composites are used for underwater sonar
28). Piezoelectric strain constant d for given stress x and electric field E is
HintIt is the ratio of E & x
29). Piezoelectric voltage constant g defines the relation between
HintRatio of External stress & induced electric field
30). The piezoelectric parameter that characterizes the sharpness of the electromechanical resonance system
HintMechanical quality factor is one kind of piezoelectric parameter
31). The acoustic impedance is given by
HintIt is the ratio of pressure and volume velocity
32). Polymers have----------- piezoelectric constant compared to ceramics
HintAs compared to ceramics it has less piezoelectric constant
33). Piezoelectric materials are also related to
HintAn alternate name is Ferroelectric material
34). Multimorph contains
HintMultimorph includes minimum two transducers
35). For off-resonance frequency application, piezoelectric should have
HintPiezoelectric should include less dielectric loss
36). Which of the following type transducer is used for measuring changes within pressure, temperature, acceleration & strain?
HintPiezoelectric sensor is used to measure different changes
37). Piezoelectric crystals are __________
HintThese crystals liquefy within water and it is completely soluble within water.
38). Piezoelectric crystals generate _________
HintPiezoelectric crystals generate maximum voltage at less current.
39). Piezoelectric transducer mainly includes…
Hint: One kind of crystal is used in piezoelectric transducer
40). In a piezoelectric transducer, once a compressive power is given to a quartz crystal then what will happen?
HintAt one face of the crystal in transducer will be induced with positive charge carriers
41). The term piezoelectric means?
HintOnce pressure is applied then current will be generated
42). Which of the following material does not contain the property of piezoelectric?
HintThe materials like glassy, crystalline, etc.
43). The ceramic material operates at which temperature?
HintThe ceramic material operates at 3000ºC to 4000ºC
44). The charge polarity in transducer mainly depends on …
HintIt depends on the way of applied force
45). What is the function of a transducer?
HintTransducer is used to convert one form of energy to other form
46). Which of the following is the example of a transducer?
HintThe device converts from sound to an electrical signal.
47). The sensitivity of a piezoelectric transducer is _________
HintA piezoelectric transducer includes high sensitivity
48). In which of the following kitchen application, a piezoelectric crystal is used
HintA piezoelectric crystal is used in kitchen application to lighten the stove.
49). What is the sensitivity of a piezoelectric transducer?
HintThe sensitivity is ranges from 25 to 35 mV/kPa
50). What kind of energy conversion can be done by a piezoelectric transducer?
HintIt converts mechanical to electrical energy.

Piezoelectric Transducer Questions and Answers

51). What is the working principle of piezoelectric transducer?
HintThe electric current that build ups within a certain solid materials
52). The sensing element used in piezoelectric transducer is
HintThe sensing element used in this transducer is rock crystal
53). The frequency response of piezoelectric transducer is..
HintThis transducer has maximum frequency response
54). The transient response of piezoelectric transducer is..
HintThis transducer has maximum transient response
55). The o/p attained by the piezoelectric transducers is
HintThe output of this transducer is very less
56). In some cases, the output may effected by the …..
HintThe output of the piezoelectric transducer may effected by the clamminess & hotness
57). The impedance of piezeoelectric transducer is
HintThe piezoelectric transducer has maximunm impedance.
58). Which of the following cannot measured by the piezoelectric transducer?
HintIt cannot measure the fixed force
59). If a fixed force is given to a piezoelectric transducer, then the output will be?
HintThe output of this transducer is nothing.
60). For dynamic measurement, which of the following transducer is used?
HintA type of electroacoustic transducer
61). In which of the following application, piezoelectric transducer is used?
HintIt is used in electronic oscillator
62). Which of the following transducer is known as an active transducer?
HintPiezoelectric sensor is called as an active transducer
63). Which of the following substance produces the voltage once they are mechanically forced through specific planes.
HintThe substance used to convert the energy from mechanical to electrical
64). In electrostatic dust filters & spark ignition engines, what is the main function of piezoelectric transducer?
HintThis transducer is used to provide less current & maximum voltage
65). A Piezo-electric crystal simply melts in ________
HintA Piezo-electric crystal simply melts in maximum temperature.
66). When a piezoelectric crystal generates an emf?
HintOnce external force is given, then it generates an emf
67). When Piezoelectric transducers starts working?
HintThe working of this transducer mainly depends on temperature
68). Which of the following transducers are inverse transducers?
HintPiezoelectric sensor is an inverse transducer
69). Rochelle salt & quartz materials come under the group of?
HintOne of the natural group materials is quartz
70).Once mechanical energy is applied across the piezoelectric material then it generates….?
HintPiezoelectric materials generate electrostatic energy
71). Which of the subsequent substance is piezo electric?
HintCeramics are Piezo electric substances
72). A piezo electric crystal is used to measure…..?
HintA piezo electric crystal measures power
73). Piezo-electric transducer is used to measure?
HintThe c = a∈⁄d can be measured using this transducer
74). Which of the following transducer is self generating?
HintIt is one kind of power stone.
75). Piezoelectric crystals generate_________.
HintPiezoelectric crystals are used in electrostatic dust filters & spark-ignition engines for generating maximum voltage.

Piezoelectric Transducer MCQs for Exams

76). In which year piezoelectric effect was discovered?
HintPiezoelectric effect was discovered in between 1875 to 1890
77). Who invented the piezoelectric effect?
HintPiezoelectric effect was discovered by curie brothers
Please refer to this link to know more about Piezoelectric Effect
78). The size of piezoelectric transducer is…
HintThe size of piezoelectric transducer is tiny
79. The frequency response of piezoelectric transducer is…
HintThe piezoelectric transducer has maximum frequency response
80. The transient response of piezoelectric transducer is…
HintThe piezoelectric transducer has maximum transient response
81). In which of the following transducer, providing the desired shape to the crystal material with ample strength is difficult?
HintIn piezoelectric transducer, providing the required shape to the crystal type material is not easy.
82). In which of the following transducer needs an external circuit to provide high output
HintPiezoelectric transducer uses external circuit to provide maximum output
83). For dynamic measurement, which transducer is used?
HintThe piezoelectric transducer is used where the parameters changes at the quick rate
84). which of the following sensor is used along with a Piezo transducer/sensor to measure stress, force, vibrations.
HintBy using this sensor strain on object can be measured.
85). What is the role of piezoelectric transducer in automotive companies?
HintThis transducer is used to notice ignition within automobiles
86). What is the function of Piezoelectric transducers in industrial processing devices?
HintThe power can be monitored in industries by this transducer
87). At which temperature, synthetic crystal & Rochelle salt cannot be utilized?
HintThe synthetic crystal & Rochelle salt is used > 115 degree F.
88). As compared to natural crystals, synthetic crystals are …?
HintSynthetic crystals give quick response & gives max output
89). The voltage which is generated by a piezoelectric transducer can be measured simply by using…
HintVoltmeter is used to measure the voltage generated by a transducer.
90). Which of the following stress is used in piezoelectric transducer?
HintBoth the tensile & Compressive stresses are used in piezoelectric transducer.
91). Which of the following word is used to derive the term piezoelectric……
HintThe term piezoelectric is derived from Greek word.
92). Which of the following characteristic is unique for piezoelectric effect ……
HintOnce voltage is applied to the transducer, then they change the dimension through certain plane
93). When electric field is applied to the quartz crystal then what will happen?
HintWhen quartz crystal is in electric field then it becomes into longer
94). When electric field is applied in reverse direction to the quartz crystal then what will happen?
HintWhen an electric field is given in reverse direction then quartz crystal will become into longer
95). Which of the following condition is not suitable to measure?
HintStatic condition is not appropriate to measure
96). Piezoelectric transducer is effected by…..
HintPiezoelectric transducer will effect by temperature
97). Piezoelectric transducer is used in seismographs for measuring…?
HintThese transducers are used for measuring vibrations within rockets.
98). Which of the following modes are used in piezoelectric sensors?
HintBoth the modes like charge and voltage are used in these sensors.
99). A device that is used to change the energy from one form to other is called as?
HintA sensor or transducer converts the energy from one form to other
100). What is the mathematical expression of piezo electric transducer?
HintThe expression for piezo electric transducer is Vo = g*t*P
101). The voltage range produced by a piezo disc is?
HintThe minimum voltage generated by a piezo disc is 13V
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