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Tachometer Question & Answers

March 2, 2023 By Wat Electrical

This article lists 75 Tachometer MCQs for engineering students. All the Tachometer 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 on the fundamentals of Tachometer.

A tachometer is a device that is used for measuring the speed of a dynamic device/motor in RPM where RPM is Revolutions per minute.  They are classified as analog and digital type.

They operate on the relative motion principle. There are4 types of tachometers. They’re: Analog tachometers, Digital tachometers Contact and Non-contact tachometer, and Time and frequency measuring tachometer.

Contact and Non-contact tachometer classified-based data acquisition. The advantages of a non-contact-based tachometer include accuracy, efficiency, and durability.

A tachometer instrument is used to measure the revolution of the speed of a disk/shaft. These are normally used in different machines and motors which are available in the automotive and aviation industries.

1). Which of the following is the principle of Tachometer?

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2). Which of the following are class of tachometers?

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3). Which are measured using Tachometer?

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4). Which tachometers is classified based data acquisition?

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Read more about SCADA.
5). Which tachometer is classified based on measurement technique?

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6). Which of the following are Data acquisition types?

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7). What is the sensitivity value of tachometer?


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8). Tachometer measures ____ quantity?

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9). What is RPM?

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10). What are the applications of Tachometer?

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11). Which are digital Tachometer components?

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Read more about LED.
12). What is the purpose of tachometer sensors with tachometer detects?

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13). A digital type of tachometer is an optical type_____?

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14). A tachometer is available as ___ forms?

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15). Which tachometer should be joined with the rotating shaft?

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16). Tachometer which has laser as a component is ____?

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17). Which are the advantages of non-contact based tachometer?

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18). The speed of digital tachometer is?

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19). Which type of beam is used in non-contact type tachometer?

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20). What is the measuring angle in laser type tachometer?

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Tachometer MCQs for Students

21). In which type, the tachometer calculates the speed by measuring the number of frequency of pulses?

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22). A frequency type tachometer depends on the speed of the rotating?

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23). Up to how many digits does a laser type tachometer displays?

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24). In which type, the tachometer is more accurate for the low speed measurements?

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25). In which type of tachometer speed is calibrated with respect to the timegap between the pulses?

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26). Which is the operational temp range of contact based digital tachometer?

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27). Which is the temp storage range of contact based digital tachometer?

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28). Which is rotating speed range of contact based digital tachometer?

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29). A contactless digital type tachometer has measuring speed of?

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30). What is the frequency range of frequency type tachometer?

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31). Which of the following are tachometer type generators?

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32). Is it possible for a tachometer to be wrong?

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33). Which tachometers does cars have?

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32). In which type of tachometer, it will have needle and dial type of interface?

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33). Units of time period is?

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34). In which type of tachometer, it will does not have a memory storage?

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35). In which type of tachometer, it cannot compute averaging, deviation, etc?

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36). In which type of tachometer, it can perform the statistical functions like averaging, deviation, etc?

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37). What is the use of Stroboscope?

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38). What is the advantage of stroboscope?

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39). Frequency is measured in terms of?

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40). What is principle of Centrifugal tachometer?

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Tachometer MCQs for Interviews

41). Centrifugal tachometer range in rpm is?

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42). A 60 Watt bulb emits ____ lumen?

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43). Which of the rays LED do not radiate?

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44). What is the representation of tacho?

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45). What is the representation of meter?

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46). Which is the function of tachometer and speedometer?

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47). Mechanical tachometer are based upon measuring the?

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48). A centrifugal force is?

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49). The centrifugal force is applied in rotating devices such as?

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50). What is torque?

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Read more about Torque converter
51). How does tachometer measures torque?

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52). What is speed of RPM?

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53). Which of the following effect covers 2 same metal expansion?

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54). How many types of mechanical tachometer?

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55). What is the accuracy of hand speed indicator tachometer?

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56). What is the rotational speed of a hand speed indicator tachometer?

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57). What is present in the hand speed indicator tachometer?

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58). What is the function of the automatic disconnect counter button in hand speed indicator tachometer?

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59). What is use of spindle in hand speed indicator tachometer?

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60). What happens if the start button is pressed in hand speed indicator tachometer?

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61). What is the use of vibrating reed tachometer?

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62). What is the accuracy of hand speed indicator tachometer?

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63). What is speed range of vibrating reed tachometer?

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64). What are components in vibrating reed tachometer?

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65). What are components of a hand speed indicator tachometer?

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66). How the set of reeds arranged in vibrating reed tachometer?

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67). Which type of tachometers are not connected to shaft to measure the speed?

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68). What are the components are in slipping clutch tachometer?

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69). What is speed of shaft in slipping clutch tachometer?

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70). Where is the spiral spring is connected in slipping clutch tachometer?

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71). Where is the friction material is placed in slipping clutch tachometer?

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72). What are the components of centrifugal tachometer?

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73). What are the types of electrical tachometer?

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Read more about Eddy currents
74). What is the accuracy of digital tachometer?

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75). Which of the following is A1 watt type white color LED radiation?

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