Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.

Amplified input signal is digitised through ________(a) A/D converters(b) D/A converters(c) Rectifiers(d) Sigma delta modulatorsI got this question in exam.This key question is from PC based Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»

Correct OPTION is (a) A/D CONVERTERS

Easiest explanation: In a PC based DATA acquisition system, the amplified input signal is converted to digital FORM by MAKING use of high speed A/D converters. These are interfaced to the PC bus.

2.

Input signal range in a PC based data acquisition system is _______(a) 0.10 mV to 1 V(b) 1 mV to 100 V(c) 5 mV to 5 V(d) 10 mV to 10 VThe question was asked in an international level competition.The query is from PC based Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Right choice is (d) 10 mV to 10 V

Best explanation: In a PC based data acquisition system, the input SIGNAL in the range of 10 mV to 10 V is amplified by means of a digital programmable gain AMPLIFIER to a particular level.

3.

Data analysis hardware is used for _______(a) making the process independent(b) slowing the process(c) fastening the process(d) making the process constantThe question was posed to me during an online exam.This intriguing question comes from PC based Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Correct option is (c) fastening the process

The EXPLANATION is: In a PC BASED DATA acquisition system, data ANALYSIS software is used for the purpose of mainly fastening the computations and analysis in case of DSP applications.

4.

What are MIMIC displays?(a) man-material interface(b) man-made interface(c) man-machine interface(d) man-machine interfaceI have been asked this question by my college professor while I was bunking the class.Question is taken from PC based Data Acquisition System in division Data Acquisition System of Electrical Measurements

Answer»
5.

Personal computer does not contain additional hardware in a PC based data acquisition system.(a) True(b) FalseI had been asked this question during an interview.My question is from PC based Data Acquisition System topic in portion Data Acquisition System of Electrical Measurements

Answer»

The CORRECT answer is (b) False

The explanation is: In a PC based data acquisition system, the personal computer consists of ADDITIONAL hardware for data analysis and data acquisition. These are integrated through the means of software.

6.

PC based data acquisition system displays system parameters ____________(a) once in a while(b) intermittently(c) continuously(d) only at specific intervalsI had been asked this question in an online quiz.My doubt is from PC based Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer» RIGHT option is (c) continuously

To explain I would say: A PC based DATA ACQUISITION system displays the parameters of a system in a continuous manner. As a result all the parameters are monitored instantaneously and conveniently.
7.

System parameters are distinguished by physical attributes.(a) True(b) FalseThe question was asked during an interview.Question is taken from PC based Data Acquisition System in section Data Acquisition System of Electrical Measurements

Answer» CORRECT OPTION is (a) True

The EXPLANATION: In a PC based data acquisition system, physical attributes such as blink, underline, inverse video, etc are used to DISPLAY the system PARAMETERS.
8.

ADD ON card is used for _______(a) to reduce noise(b) communication(c) to boost the magnitude(d) to measure voltageThis question was addressed to me by my college professor while I was bunking the class.My question is taken from PC based Data Acquisition System in portion Data Acquisition System of Electrical Measurements

Answer»

Right answer is (B) communication

Explanation: PC based data ACQUISITION SYSTEM makes use of an ADD ON card for the purpose of communication and analysis of multiple MEASUREMENT data.

9.

What led to the development of PC based transducers?(a) low cost(b) medium cost(c) high cost(d) zero costThis question was addressed to me in examination.My question comes from PC based Data Acquisition System in portion Data Acquisition System of Electrical Measurements

Answer»

The correct option is (a) low COST

To explain: Easy availability, low cost and large scale usage of PERSONAL Computers have led to the development of interfaces between PC and the TRANSDUCER outputs.

10.

Many channels can be monitored at the same time by __________(a) Demultiplexing(b) A/D conversion(c) Multiplexing(d) D/A conversionI had been asked this question in final exam.I need to ask this question from Multiple Channel Data Acquisition System in chapter Data Acquisition System of Electrical Measurements

Answer»

Right choice is (c) MULTIPLEXING

Easiest EXPLANATION: Monitoring of a NUMBER of channels can be done at the same time by multiplexing the OUTPUTS of the SAMPLE and hold circuit.

11.

Multiplexing after A/D conversion provides immunity to noise.(a) True(b) FalseThe question was posed to me in an interview for internship.This question is from Multiple Channel Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer» CORRECT option is (a) True

The explanation: MULTIPLEXING after A/D CONVERSION involves the transformation of analog signal into digital FORM. Data transmission provides, immunity from line frequency and other INTERFERENCES.
12.

In a Multichannel Analog Multiplexed System, data stored in sample and hold circuit is converted into analog form.(a) True(b) FalseI had been asked this question in an interview for job.Question is from Multiple Channel Data Acquisition System in division Data Acquisition System of Electrical Measurements

Answer» RIGHT ANSWER is (b) False

Easiest explanation: The Multichannel ANALOG Multiplexed System, converts the previous data STORED in the sample and HOLD circuit into digital form. Upon data collection, mode of the sample and hold circuit is changed to hold mode.
13.

Multiplexing after A/D conversion involves _____________(a) noisy data(b) mixed signal data(c) analog data(d) digital dataI have been asked this question in homework.Asked question is from Multiple Channel Data Acquisition System in chapter Data Acquisition System of Electrical Measurements

Answer» RIGHT ANSWER is (d) digital data

To explain: Multiplexing after A/D conversion is also known as fast data acquisition. Digital data performs the LOGICAL operation and DEPENDING on the relative speed, the scan rate can be increased or DECREASED.
14.

In a Multichannel Analog Multiplexed System __________(a) A/D converter is used(b) D/A converter is used(c) Sigma delta converter is used(d) Modulator is usedThis question was posed to me in semester exam.Asked question is from Multiple Channel Data Acquisition System in section Data Acquisition System of Electrical Measurements

Answer»

Right OPTION is (a) A/D CONVERTER is used

The best I can explain: In a Multichannel Analog Multiplexed System, individual analog signals are applied directly. The signals are amplified and CONDITIONED. An A/D converter then CONVERTS the signals into digital FORM.

15.

Multichannel Analog Multiplexed System is __________(a) very fast(b) fast(c) slow(d) moderateThe question was asked during a job interview.Question is from Multiple Channel Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer» CORRECT option is (C) slow

The best explanation: The Multichannel ANALOG Multiplexed System is one type of multiplexed system. It is comparatively slow. As it shares more than one CHANNEL, the cost is LESS.
16.

Multichannel Analog Multiplexed System utilises time __________(a) using a transformer(b) using a capacitor(c) using a flip-flop(d) using a muxI have been asked this question during an internship interview.This interesting question is from Multiple Channel Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»
17.

How many types of multiplexed system exist?(a) 2(b) 3(c) 5(d) 10This question was addressed to me in an interview for internship.My question is based upon Multiple Channel Data Acquisition System topic in portion Data Acquisition System of Electrical Measurements

Answer»

Correct CHOICE is (b) 3

The EXPLANATION is: In general there are three TYPES of MULTIPLEXED systems. They are as FOLLOWS:

• Multichannel Analog Multiplexed System

• Multiplexing Output of Sample/Hold Circuits

• Multiplexing after A/D Conversion.

18.

Multichannel data acquisition system has __________(a) multiple channels(b) single channel(c) two channels(d) five channelsI got this question by my school principal while I was bunking the class.This question is from Multiple Channel Data Acquisition System in portion Data Acquisition System of Electrical Measurements

Answer»

Correct answer is (a) MULTIPLE CHANNELS

The best EXPLANATION: A multichannel data acquisition system has multiple channels. The various subsystems can be shared in terms of time by more than two or more input SOURCES.

19.

How can the input be isolated from the system?(a) using optocouplers(b) using op-amps(c) using a capacitor(d) using rectifiersThe question was asked in examination.The origin of the question is Single Channel Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer»

Correct option is (a) using optocouplers

The EXPLANATION is: By MAKING use of an OPTOCOUPLER, we can ISOLATE the input signal from the system. Before processing the data, pre-amplifiers are fitted with active filters so as to ELIMINATE the noise and boost the signal.

20.

What is pre-amplification?(a) reducing the magnitude of a signal(b) making the magnitude of a signal zero(c) reducing the noise(d) boosting the signalI got this question in my homework.Origin of the question is Single Channel Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»

Correct CHOICE is (d) boosting the SIGNAL

Explanation: To match the input needs, the level of an input signal is BOOSTED. This is done as the magnitude of the input signal is sometimes very LOW. This is known as pre-amplification.

21.

Which technique is most widely used in the single channel data acquisition system?(a) Counter type approximation(b) Flash approximation(c) Successive approximation(d) Delta Sigma approximationThis question was addressed to me during a job interview.Question is taken from Single Channel Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Correct OPTION is (c) Successive APPROXIMATION

To elaborate: The successive approximation technique is most widely used in a SINGLE channel DATA acquisition system. This is due to the fact that it has a high value of resolution and high speed.

22.

A/D converters can’t be used for low frequency ranges.(a) True(b) FalseThis question was addressed to me in unit test.My doubt is from Single Channel Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»
23.

Digital outputs are obtained from _____________(a) A/D converter(b) D/A converter(c) Oscilloscope(d) Voltage sourceI got this question at a job interview.I want to ask this question from Single Channel Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer»

The correct OPTION is (a) A/D converter

Easy explanation: An analog to DIGITAL converter provides digital outputs. The A/D CONVERTERS are designed in such a way that they accept external commands in ORDER to convert and hold the OPERATIONS.

24.

Which is the best example of a single channel data acquisition system?(a) CPM(b) BPM(c) APM(d) DPMThis question was posed to me at a job interview.This intriguing question comes from Single Channel Data Acquisition System in division Data Acquisition System of Electrical Measurements

Answer»

Correct option is (d) DPM

Explanation: A digital panel METER usually abbreviated as DPM is the best EXAMPLE of a SINGLE channel data acquisition system.

25.

The buffer output is ________(a) analog(b) zero(c) digital(d) mixed modeThis question was addressed to me in semester exam.The question is from Single Channel Data Acquisition System in section Data Acquisition System of Electrical Measurements

Answer»

Right choice is (c) digital

The BEST I can explain: In a single CHANNEL data acquisition system, the output of the buffer CIRCUITRY is digital in nature. It is STORED in a digital computer or a storage device or SOMETIMES even a printer.

26.

A/D conversion rate is __________(a) variable(b) predefined(c) zero(d) constantThe question was asked by my school principal while I was bunking the class.I'm obligated to ask this question of Single Channel Data Acquisition System topic in portion Data Acquisition System of Electrical Measurements

Answer»

The CORRECT ANSWER is (B) predefined

The best explanation: In a single channel DATA acquisition SYSTEM, the conversion rate of an analog to digital converter is predefined. A/D converter performs the conversions at a pre-determined rate.

27.

A single channel data system consists of a signal conditioner, A/D converter and a buffer.(a) True(b) FalseI have been asked this question in an interview for job.The query is from Single Channel Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»

The CORRECT choice is (a) True

The best I can explain: The single channel data ACQUISITION system CONSISTS of a signal conditioner, an analog to digital CONVERTER and a buffer CIRCUITRY.

28.

Digital acquisition systems are used when _________(a) bandwidth is high(b) bandwidth is medium(c) bandwidth is zero(d) bandwidth is lowI had been asked this question during an online exam.This interesting question is from Digital Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Correct choice is (d) bandwidth is low

Best EXPLANATION: When the bandwidth required is low, USUALLY digital ACQUISITION SYSTEMS are made use of. For higher accuracy and lower per channel cost, digital data acquisition systems are used.

29.

Data acquisition systems are not widely used.(a) True(b) FalseThis question was addressed to me in quiz.The query is from Digital Data Acquisition System in division Data Acquisition System of Electrical Measurements

Answer»

Correct answer is (b) False

The explanation is: In digital RECORDERS, DATA ACQUISITION systems are USED WIDELY in industries, space applications, medical and telephony.

30.

For lower accuracies _________(a) digital acquisition system is used(b) both digital and analog acquisition systems are used(c) analog acquisition system is used(d) mechanical data acquisition system is usedThis question was addressed to me in an interview.Asked question is from Digital Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer»

Right OPTION is (c) analog acquisition SYSTEM is USED

The best explanation: When LOW values of accuracy is required, analog data acquisition system is used. This includes a wide frequency bandwidth as well.

31.

What is a digital recorder?(a) records digital data(b) records analog data(c) does not record data(d) records both analog and digital dataI got this question in a job interview.This interesting question is from Digital Data Acquisition System in division Data Acquisition System of Electrical Measurements

Answer» CORRECT ANSWER is (a) records digital data

Explanation: A digital RECORDER is used for the purpose of recording the digital data. PUNCHED cards, magnetic tape recorders, type written PAGES, etc make use of digital recorders.
32.

Output of A/D converter is _________(a) given to an analog display(b) given to a digital display(c) given to a CRO(d) given to a voltmeterThe question was posed to me during an internship interview.Asked question is from Digital Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer» RIGHT CHOICE is (B) given to a digital display

Explanation: OUTPUT from the analog to digital converter is given to a digital display device or to a digital recorder for the purpose of displaying or RECORDING.
33.

What are auxiliary equipments?(a) equipment(b) guard rings(c) devices(d) voltage sourceThe question was asked in my homework.This question is from Digital Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer»

The CORRECT CHOICE is (c) DEVICES

Explanation: Auxiliary equipments are basically devices used for system PROGRAMMING functions and digital data processing applications.

34.

What is the main function of auxiliary equipment?(a) unit step response(b) ramp response(c) non-linear response(d) linear responseI had been asked this question during a job interview.This is a very interesting question from Digital Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer»

Right choice is (d) linear response

To ELABORATE: The typical functions of auxiliary equipments INCLUDE LINEARIZATION and limit COMPRESSION for the input signals. Individual instruments or a digital computer is used to perform these functions.

35.

A/D converter is used for __________(a) converting analog to digital(b) converting digital to analog(c) converting digital to mixed signal mode(d) converting analog to mixed signal modeI got this question in an internship interview.I'd like to ask this question from Digital Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Correct ANSWER is (a) converting analog to digital

Easiest explanation: In a digital DATA ACQUISITION SYSTEM, an A/D converter is used for the purpose of converting analog SIGNALS to digital.

36.

Output signal is captured using _________(a) CRO(b) plotter(c) recorder(d) voltmeterThis question was posed to me in an online interview.This intriguing question comes from Analog Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

The correct option is (C) recorder

Explanation: In an analog data acquisition SYSTEM, the output signal is recorded by means of an analog recorder. It includes the likes of strip chart recorder, magnetic TAPE recorder, ETC.

37.

Before and after each test, calibration is carried out.(a) True(b) FalseThis question was addressed to me by my college director while I was bunking the class.The above asked question is from Analog Data Acquisition System in chapter Data Acquisition System of Electrical Measurements

Answer» CORRECT option is (a) True

The explanation: In an analog data acquisition system, CALIBRATION carried out before each TEST is KNOWN as pre-calibration. The test carried out after calibration is known as post-calibration.
38.

Analog computers have __________(a) zero cost(b) intermediate cost(c) more cost(d) less costThis question was posed to me in my homework.My enquiry is from Analog Data Acquisition System in portion Data Acquisition System of Electrical Measurements

Answer»

The correct CHOICE is (d) less cost

To explain: The ACCURACY of digital computers is more than that of analog computers. Analog computers are WIDELY USED when compared to digital computers because of their less cost.

39.

Multiplexers are used when the distance between source and destination is less.(a) True(b) FalseI had been asked this question in unit test.The origin of the question is Analog Data Acquisition System in portion Data Acquisition System of Electrical Measurements

Answer»

Correct option is (b) False

The explanation: Generally multiplexers are MADE use of only when the distance of separation between the TRANSMITTING END and the RECEIVING end is more.

40.

Signal conditioner is used for _________(a) attenuating the voltage(b) maintaining a constant voltage(c) keeping the voltage zero(d) boosting the voltageThis question was posed to me during an online exam.The origin of the question is Analog Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»

The correct CHOICE is (d) boosting the voltage

Easy explanation: Signal conditioner is an important part of an analog data acquisition SYSTEM. A signal conditioner converts the output voltage to the desired FORM which is accepted by the NEXT stage.

41.

A multiplexer is used for _________(a) accepting multiple inputs(b) accepting single input(c) accepting multiple outputs(d) accepting single outputThis question was posed to me in quiz.This is a very interesting question from Analog Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer» RIGHT choice is (a) accepting MULTIPLE inputs

To elaborate: A multiplexer forms an important CONSTITUENT of an analog data acquisition system. It takes multiple analog inputs. By MAKING use of a multiplexer many quantities can be transmitted.
42.

Sensors produce frequency which is counted by _________(a) a chemical counter(b) a mechanical counter(c) an electronic counter(d) a basic counterI got this question in homework.Query is from Analog Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»

The correct option is (c) an electronic counter

The BEST I can explain: TRANSDUCERS CONSIST of special sensors used to produce frequency that can be counted by MEANS of an electronic counter. This frequency forms an integral part of the frequency measured.

43.

Transducer produces a _________(a) proportional current(b) proportional voltage(c) proportional resistance(d) proportional powerThe question was asked during an interview for a job.Question is from Analog Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

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44.

Data acquisition system can be used in__________(a) 10 ways(b) 8 ways(c) 4 ways(d) 2 waysI have been asked this question during an online exam.I'm obligated to ask this question of Objectives of Data Acquisition System in division Data Acquisition System of Electrical Measurements

Answer»

Correct option is (d) 2 ways

The explanation is: A data acquisition system can be USED to measure and record the SIGNALS in two ways. In the first METHOD the signal can be directly MEASURED from electrical quantities such as a.c., d.c. voltage or current. In the second case the signal originates from transducers such as pressure TRANSDUCER, thermocouple, etc.

45.

Transducer is used to convert a _________(a) physical quantity into an electrical signal(b) electrical signal into a physical quantity(c) physical quantity into a mechanical quantity(d) physical quantity into a chemical quantityI had been asked this question by my college director while I was bunking the class.Question is taken from Analog Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Right answer is (a) physical quantity into an electrical signal

Easiest explanation: Transducer FORMS one of the most important components of an ANALOG data ACQUISITION system. It CONVERTS a physical quantity into an electrical signal. STRAIN gauge, thermocouples, piezoelectric devices are the most widely used transducers.

46.

Data acquisition system is mainly classified into __________(a) 2 types(b) 4 types(c) 6 types(d) 8 typesI had been asked this question in quiz.Enquiry is from Objectives of Data Acquisition System in portion Data Acquisition System of Electrical Measurements

Answer»

The CORRECT CHOICE is (a) 2 types

Easiest EXPLANATION: A data acquisition system is basically classified into TWO main types. They are analog and digital. While the analog data system deals with signals having analog input signals the digital data system consists of input signals in digital form.

47.

A data acquisition system provides __________(a) partial communication(b) ineffective communication(c) effective communication(d) complete communicationThe question was posed to me in an online interview.My enquiry is from Objectives of Data Acquisition System in section Data Acquisition System of Electrical Measurements

Answer»

Correct answer is (C) effective COMMUNICATION

To EXPLAIN I would say: The DATA acquisition system must be ABLE to provide proper human communication to minimize the unit availability and maximize the unit output at a lower cost.

48.

The data acquisition system can have any speed.(a) True(b) FalseThe question was asked during an interview for a job.I need to ask this question from Objectives of Data Acquisition System topic in chapter Data Acquisition System of Electrical Measurements

Answer»

The CORRECT answer is (B) False

Explanation: A data acquisition system must acquire the required speed at the correct time. It must also use the data efficiently to detect the STATUS of the PLANT.

49.

The data acquisition system implies input data collection __________(a) in mixed signal form(b) in analog form(c) in digital form(d) in the form of binary codesThis question was addressed to me in quiz.This key question is from Objectives of Data Acquisition System topic in section Data Acquisition System of Electrical Measurements

Answer»

The correct answer is (c) in digital form

To explain I WOULD say: In a DATA acquisition system, input data is COLLECTED in the form of digital SIGNALS. The digital signals are collected in a fast, economic, RELIABLE and accurate manner.

50.

Modern electronic instrumentation system is not complex.(a) True(b) FalseThe question was asked in homework.I'd like to ask this question from Objectives of Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer»

Right ANSWER is (a) True

The explanation is: INSPITE of significant development in the field of electronic instrumentation systems with the advent of OP amps, data converters, multiplexers, MICROPROCESSORS and microcontrollers, they are not complicated.