VALLIAMMAI ENGINEERING COLLEGE
SRM Nagar, Kattankulathur – 603 203
DEPARTMENT OF
ELECTRONICS AND INSTRUMENTATION ENGINEERING
QUESTION BANK
VI SEMESTER
EI6601–Modern Electronic Instrumentation
Regulation – 2013
Academic Year 2017 – 18
Prepared by
Ms. Z.Jenifer, Assistant Professor/EIE
Mr. I.Andrew Xavier Raj, Assistant Professor/EIE
VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur – 603 203.
DEPARTMENT OF ELECTRONICS AND INSTRUMENTATION
ENGINEERING
QUESTION BANK
SUBJECT : EI6601 –MODERN ELECTRONIC INSTRUMENTATION
SEM / YEAR:V SEMESTER / III YEAR
UNIT I -ELECTRONIC INSTRUMENTS
SYLLABUS
Electronic Voltmeter and their advantages – Types, Differential amplifier, source follower,
rectifier – True rms reading voltmeter – Electronic multimeter and ohmmeter – Current
measurement – Power measurement - Microprocessor based DMM with auto ranging and self
diagnostic features.
PART - A
Q.No Questions BTLevel Competence
1. Define instrument. BTL1 Remember
2. What are the advantages of electronic voltmeters over
conventional ones? BTL1 Remember
3. What are the general characteristics of digital voltmeter? BTL1 Remember
4. Show the practical applications of multi meter. BTL3 Apply
5. State the limitations of true RMS meter. BTL1 Remember
6. Generalize the use of true RMS meter. BTL6 Create
7. List the advantages and disadvantages of an electronic
multi meter. BTL1 Remember
8. Give the essential parts of a rectifier type electronic volt
meter. BTL2 Understand
9. Discuss about electronic voltmeters. BTL2 Understand
10. Differentiate between a series type ohmmeter and a shunt
type ohmmeter. BTL5 Evaluate
11. Point out the advantages of differential amplifier. BTL4 Analyze
12. Formulate the closed loop gain equation for source
follower type of electronic voltmeter. BTL6 Create
13. Summarize the advantages of true RMS meter. BTL5 Evaluate
14. Discuss about the multi meter. BTL2 Understand
15. List the elements present in an electronic ohmmeter. BTL1 Knowledge
16. Classify electronic voltmeters. BTL3 Apply
17. Compare the current measurement and power
measurement. BTL4 Analyze
18. Give the salient features measurement of power at audio
frequencies. BTL2 Understand
19. Show the applications of digital multi meter (DMM). BTL3 Apply
20. Analyze the automatic ranging in DMM. BTL4 Analyze
PART –B
1. (i) Describe the construction, working principle of True
RMS reading voltmeter with neat sketch (10)
(ii)What are the applications of True RMS reading
voltmeter? (3)
(3)
BTL1 Remember
2. Describe the various methods of measurement of power
at radio frequencies.(13) BTL1 Remember
3. (i)Describe the working of electronic Ohmmeter with the
help of neat diagram.(8)
(ii) What are the advantages, disadvantages and
application of electronic Ohmmeter.(5)
BTL1 Remember
4. (i) What are the advantages of electronic voltmeter.(5)
(ii) Examine the operation of differential amplifier with a
neat circuit diagram.(8)
BTL1 Remember
5. (i) Discuss in detail about the circuit diagram and
operation of a source follower type voltmeter.(8)
(ii) Infer the advantages, disadvantages and application of
source follower type voltmeter.(5)
BTL2 Understand
6. (i) Discuss the working of electronic voltmeters which use
rectifiers with its circuit diagram.(7)
(ii) Describe the AC/DC voltmeter and ammeter section
of a multimeter.(6)
BTL2 Understand
7. Explain with the help of a block diagram, the various parts
of an electronic multimeter. (13) BTL2 Understand
8. (i) Illustrate electronic voltmeter with neat sketch. (6)
(ii) Classify the various types of electronic voltmeter in
detail with neat sketch. (7)
BTL3 Apply
9. Illustrate the operation of microprocessor based digital
multimeter (DMM) with auto ranging and self diagnostic
features, with necessary diagram. (13)
BTL3 Apply
10. Explain the hardware and flowchart of a microprocessor
based digital multimeter with auto ranging and Self
diagnostic features. (13)
BTL4 Analyze
11. Explain the circuit diagram and operation of differential
electronic Voltmeter. (13) BTL4 Analyze
12. Explain the construction , working principle and
applications of True RMS reading voltmeter with neat
sketch.(13)
BTL4 Analyze
13. Explain the various components and methods for current
measurement. (13) BTL5 Evaluate
14. Generalize the various methods of measurement of
power at audio frequencies.(13) BTL6 Create
PART-C
1. A difference amplifier type electronic voltmeter shown in
below Fig has the following data. Voltage applied to left
FET v1 = 1 V
a.c drain resistance , rd = 100 kΩ
transconductance , gm = 0.005 mho
RD = 10 kΩ
Resistance of PMMC Meter , Rm = 50 Ω
(i) Evaluate the value of current through
ammeter.(10)
(ii) How it can be calibrated as electronic voltmeter.
(5)
BTL5 Evaluate
2. The electronic voltmeter shown below has the following
data :
Rs = 1050Ω , rd = 100kΩ and , gm = 0.005 mho
A PMMC ammeter with an iternal resistance of 50Ω is
used as the detector. If the input voltage is 1V , Evaluate
the approximate value of current through the ammeter.
BTL5 Evaluate
3. Design the circuit of a d.c voltmeter using a direct coupled
amplifier and how small values of voltages and current
can be measured with it.(15)
BTL6 Create
4. Design the circuit of true rms reading voltmeter using
thermocouples and how these voltmeters are free from
waveform errors.(15)
BTL6 Create
UNIT II - CATHODE RAY OSCILLOSCOPE AND SIGNAL ANALYZERS
SYLLABUS
General purpose cathode ray oscilloscope – Dual trace, dual beam and sampling oscilloscopes
– Analog and digital storage oscilloscope - frequency selective and heterodyne wave analyzer
– Harmonic distortion analyzer – Spectrum analyzer.
PART - A
Q.No Questions BTLevel Competence
1. Why storage scopes are necessary in measurements? BTL1 Remember
2. Define Cathode ray oscilloscope. BTL1 Remember
3. What information is provided by the spectrum analysis of
a signal? BTL1 Remember
4. Point out the advantages of dual trace oscilloscope. BTL4 Analyze
5. Analyze dual beam oscilloscope. BTL4 Analyze
6. Give some applications of sampling oscilloscope. BTL2 Understand
7. Illustrate why is a triggering circuit provided in a CRO? BTL3 Apply
8. How does the sampling CRO increase the apparent
frequency response of an oscilloscope? BTL2 Understand
9. List the applications of storage oscilloscope. BTL1 Remember
10. List the advantages of analog storage oscilloscope. BTL1 Remember
11. Generalize the modes of operation in digital storage
oscilloscope. BTL6 Create
12. Discuss the purpose of Automatic Frequency Control
(AFC) in heterodyne wave analyser. BTL2 Understand
13. Mention the different types of distortion. BTL3 Apply
14. Point out the frequency range of different types of signal
analyzers. BTL4 Analyze
15. Summarize about frequency selective wave analyzer. BTL5 Evaluate
16. Deduce the difference between a wave analyzer and a
harmonic distortion analyser. BTL5 Evaluate
17. Formulate an equation for the measured value of total
harmonic distortion (THDM). BTL6 Create
18. List the various applications of hetero dyne wave
analyzer. BTL1 Remember
19. How does a wave analyser functionally differ from a
spectrum analyser? BTL2 Understand
20. How are spectrum analyzers classified? BTL3 Apply
PART – B
1. Develop an expression for deflection D in CRO, which is
the deflection of the electron beam.(13) BTL6 Create
2. Explain in detail about the working of various parts of
Cathode Ray Tube with its internal structure.(13) BTL4 Analyze
3. (i)Describe the principle of General purpose oscilloscope
with neat block diagram.(10)
(ii)Mention the advantages of storage oscilloscopes.(3)
BTL2 Understand
4. (i) With block diagram and various waveforms at each
block, Explain the operation of sampling oscilloscope.
(7) (ii) Infer the advantages, disadvantages of dual trace over
dual beam CROs for multiple trace. (6)
BTL4 Analyze
5. Discuss in detail about the following types Oscilloscopes
with neat diagram.
a. Dual Trace Oscilloscope.(5)
b.Dual beam Oscilloscope. (4)
c. Sampling Oscilloscope.(4)
BTL2 Understand
6. (i) What is the principle of secondary emission ratio.(3)
(ii) Describe in detail about the Analog Storage
Oscilloscopes.(10)
BTL1 Remember
7. Sketch the basic block diagram for a DSO. Sketch the
system wave forms and explain its operation.(13) BTL3 Apply
8. (i)Compare and explain analog storage oscilloscopes with
digital storage oscilloscopes.(10)
(ii) Summarize the applications of a wave analyzer.(3)
BTL5 Evaluate
9. Define waveform analyzer and explain in detail about
frequency selective type wave analyzer with block
diagram.(13)
BTL1 Remember
10. (i)Label the parts and explain the working of a heterodyne
type wave analyzer circuit. (10)
(ii)List the applications of a Spectrum analyzer. (3)
BTL1 Remember
11. Describe the circuits and working of wave analyzers used
for audio frequency and megahertz range. (13) BTL2 Understand
12. Describe briefly about
a. Types of distortion.(4)
b. Total harmonic distortion.(4)
c. Harmonic distortion analyser.(5)
BTL1 Remember
13. Explain with neat block diagram about the operation of
heterodyne wave analyzer. (13) BTL4 Analyze
14. Sketch and explain in detail about the Spectrum analyzer.
(13)
BTL3 Apply
PART-C
1. Formulate an expression for vertical deflection of an
electron beam in a CRT. (15) BTL6 Create
2. An electrically deflected CRT has a final anode voltage of
2000V and parallel deflecting plates 1.5 cm long and 5
mm apart . If the screen is 50 cm from the centre of
deflecting plates , Evaluate
(i) Beam speed. (5)
(ii) The deflection sensitivity of the tube(5)
(iii)The deflection factor of the tube.(5)
BTL5 Evaluate
3. The deflection sensitivity of an oscilloscope is 35 V/cm.
If the distance from the deflection plates to the CRT
screen is16 cm , the length of the deflection plates is 2.5
cm and the distance between the deflection plates is 1.2cm
. Evaluate the acceleration anode voltage?.(15)
BTL5 Evaluate
4. How attenuators are designed with particular reference to
frequency compensation?(15) BTL6 Create
UNIT III- WAVEFORM GENERATOR
SYLLABUS
Wien’s bridge and phase shift oscillators – Hartley and crystal oscillators – Square wave and
pulse generators – Triangular wave-shape generator - Signal and function generators – Q meter
–Electronic Counters.
PART – A
Q.No Questions BTLevel Competence
1. Write the expression for frequency of oscillation of phase
shift oscillator. BTL1 Remember
2. Name the essential parts of an oscillator. BTL1 Remember
3. Distinguish between Wien’s bridge and phase shift
oscillators. BTL2 Understand
4. Give the condition of oscillation for Hartley oscillator. BTL2 Understand
5. Examine how oscillations occur in a crystal oscillator? BTL3 Apply
6. Classify the different sinusoidal oscillators. BTL3 Apply
7. Discuss about square wave generator. BTL2 Understand
8. Compare square wave generator and pulse generator. BTL4 Analyze
9. Differentiate an oscillator and an amplifier. BTL4 Analyze
10. Define triangular wave-shape generator. BTL1 Remember
11. Name two low frequency and High frequency oscillators. BTL1 Remember
12. Infer the Difference between an oscillator and an
amplifier. BTL4 Analyze
13. Express the range of RF, VHF and UHF. BTL2 Understand
14. Classify signal generator. BTL3 Apply
15. Which oscillator uses both positive and negative
feedback? Justify? BTL5 Evaluate
16. Crystal oscillators are superior to other oscillators.
Justify? BTL5 Evaluate
17. Generalize a resonant circuit oscillator. BTL6 Create
18. Rewrite the functions of a frequency counter. BTL6 Create
19. List the applications of function generator. BTL1 Remember
20. Define Q meter. BTL1 Remember
PART – B
1. (i) With a neat circuit diagram, describe the working of a
Wien bridge oscillator.(7)
(ii) Derive an expression for the resonant frequency of the
Wien Bridge Oscillator. Give its advantages and
disadvantages.(6)
BTL2 Understand
2. With neat circuit diagram explain the operation of an RC
phase shift oscillator and develop the condition for
oscillation and resonant frequency with BJT.(13)
BTL6 Create
3. (i) Describe the operation of Hartley oscillator with a neat
diagram.(7)
(ii)Derive the expression for frequency of oscillation and
condition of oscillation of Hartley oscillator.(6)
BTL2 Understand
4. Explain in detail about
a. Pulse generators.(8)
b. Square wave generators.(8)
BTL5 Evaluate
5. Explain the operation of crystal oscillator with neat
diagram and write the expression for its frequency of
oscillation.(13)
BTL4 Analyze
6. (i)Write in detail about various types of feedback
oscillators.(10)
(ii)Define oscillator and what are the classifications of
oscillator? (3)
BTL1 Remember
7. (i) Design a square wave generator for generating 1 KHZ
signal.(6)
(ii) Describe with block diagram, how different standard
waveforms are generated in a typical function
generator.(7)
BTL6
BTL1
Remember
8. Write shorts notes on
(i) Triangular wave shape generator.(7)
(ii) Signal generator. (6)
BTL1 Remember
9. (i) Develop a circuitry to generate triangular wave of 2
KHZ frequency.(10)
(ii) List the factors that causes error in Q meter.(3)
BTL6
BTL1
Create
Remember
10. (i) Examine the working of a Function generator with neat
sketch. How can you vary the Amplitude and Frequency
of the output wave form? (10) (ii) Distinguish between the signal generator and function
generator.(3)
BTL3 Apply
11. What is Q meter? Explain about its application and discuss
in detail about any one method of measurement using a Q
meter.(13)
BTL4 Analyze
12. (i) Discuss in detail about the principle of Q meter.(5)
(ii) Obtain an expression for series Q meter circuit. (5)
(iii) Explain about its various applications. (3)
BTL4 Analyze
13. A circuit having an effective capacitance of 160pF is
tuned to a frequency of 1.2MHz. In this the current falls
to 70.7% of its resonant value when the frequency of an
emf of constant magnitude injected in series with the
circuit deviates from the resonant frequency by 6KHz.
Calculate the Q factor and effective resistance by 6KHz.
(13)
BTL3 Apply
14. (i)Describe with circuit diagram the various electronic
counters. (10)
(ii) Summarize the advantages, disadvantages and
applications of electronic counter.(3)
BTL2 Understand
PART-C
1. Deduce how Barkhausen criteria is met with wein bridge
oscillator.(15) BTL5 Evaluate
2. Design a wein bridge oscillator around the following
specifications, f = 15kHz, VCC = ±10V, Iin = 1 µA, IR4 =
100 Iin.(15)
BTL6
Create
3. Prove that in a R.C.phase shift oscillator the gain of the
amplifier should be atleast 29 to sustain oscillations.(15) BTL5 Evaluate
4. Design a signal generator using envelope feedback for
amplitude modulation.(15) BTL6
Create
UNIT IV- VIRTUAL INSTRUMENTATION
SYLLABUS
Virtual instrumentation (VI) – Definition, flexibility – Block diagram and architecture of virtual
instruments – Virtual instruments versus traditional instruments – Software in virtual
instrumentation -VI programming techniques – DAQ cards for VI applications – DAQ modules
with serial communication
PART – A
Q.No Questions BTLevel Competence
1. Define virtual instrumentation BTL1 Remember
2. Describe flexibility. BTL1 Remember
3. Define clusters. What is the use of clusters? BTL1 Remember
4. What are the advantages of graphical display? BTL1 Remember
5. Differentiate between virtual instruments and traditional
instruments. BTL2 Understand
6. Distinguish Chart and graph BTL2 Understand
7. Compare virtual instruments and traditional instruments. BTL4 Analyze
8. Illustrate what does replace operation do to a file? BTL3 Apply
9. Do string operations require special operators? BTL3 Apply
10. Classify the tools available in control palette. BTL3 Apply
11. Point out the types of loops available for VI. BTL4 Analyze
12. Conclude why is virtual instrumentation necessary? BTL5 Evaluate
13. Explain sequence structure. BTL5 Evaluate
14. Create sub VI. BTL6 Create
15. Compose the use of formula node. BTL6 Create
16. Give the types of signals that can be acquired by DAQ. BTL2 Understand
17. Discuss a plug in DAQ device. BTL2 Understand
18. Point out the components of DAQ Cards. BTL4 Analyze
19. Describe about DAQ. BTL1 Remember
20. Identify few popular serial communication protocols
supported by DAQ modules. BTL1 Remember
PART – B
1. Write short notes on:
a. Virtual instrumentation programming techniques.(5)
b. Performance comparison of virtual instruments and
traditional instruments.(5)
c. Flexibility of virtual instruments.(3)
BTL1 Remember
2. (i)Briefly describe the case structure, event structure and
sequence structure operations.(7)
(ii)Write a short notes on various application of virtual
instrumentation.(6)
BTL1 Remember
3. With a neat block diagram describe the architecture of a
Virtual instrumentation system. Also state its advantages
and disadvantages over conventional instruments. (13)
BTL2 Understand
4. Explain in detail about conventional and virtual
instrument with its block diagram.(13)
BTL2 Understand
5. (i) Write a VI programme to read the data from a file and
to write data in another file using I/O operations. (7)
(ii) Write a VI to check if a number is positive or negative.
If yes, then the VI should calculate and display the square
root. Otherwise it should display a message and give a
value of -9999.00 as output. Solve using (a) case structure
(b) select function and (c) formula node.
(6)
BTL1 Remember
6. Discuss the essential requirements of DAQ cards for
virtual instrumentation systems. (13) BTL2 Understand
7. (i) Examine how labVIEW can be used to acquire,
analyze and present a measurement and automatic
application. (7)
(ii) Illustrate the operation of shift register showing the
front panel and block diagram to find the current count,
previous count, count two iterations ago and count three
iterations ago and explain.(6)
BTL3 Apply
8. (i) Explain in detail about software in virtual
instrumentation system.(10)
(ii) Explain virtual instrumentation system.(3)
BTL4 Analyze
9. (i) Explain arrays and clusters operations in detail. (7)
(ii) Explain modular programming and show how to
create a Sub VI using an example. (6)
BTL5 Evaluate
10. (i) Develop VI using for loop and while loop for
counting.(4)
(ii) Obtain the function of a shift register using VI.(3)
(iii) Develop VI to find N factorial.(3)
(iv) Discuss in detail about case structure of VI with
example. (3)
BTL4 Analyze
11. (i)Sketch and explain the block diagram of a PC based
DAQ card that can be used for VI applications.(7)
(ii)Give an example for VI programming.(6)
BTL3 Apply
12. Write in detail about loops and charts. Explain them with
an example. Explain in detail about local variables with
examples. (13)
BTL4 Analyze
13. List the various DAQ cards used for virtual
instrumentation applications and explain any one of DAQ
module with serial communication in detail. (13)
BTL1 Remember
14. Create a VI to realize digital voltmeter by acquiring the
data using DAQ. (13)
BTL6 Create
. PART – C
1. Create a VI to develop a bottle filling system with neat
diagram. (15) BTL6 Create
2. Explain the R232 connections for DAQ modules with neat
diagram. (15) BTL5 Evaluate
3. Explain with a neat VI diagram how temperature is
controlled? Use appropriate DAQ cards for obtaining real
time data. (15)
BTL5 Evaluate
4. Develop Signal Generator using DAQ Card with neat
diagram. (15)
BTL6 Create
UNIT V- TELEMETRY
SYLLABUS
General telemetry system – voltage, current and position telemetry systems – Radio frequency
telemetry – Frequency modulation, pulse-amplitude modulation and pulse-code modulation
telemetry– Frequency and time multiplexing.
PART – A
Q.No Questions BT
Level
Competence
1. Define telemetry. BTL1 Remember
2. Rewrite the applications of position telemetry system. BTL6 Create
3. List the merits and demerits of voltage telemetry system. BTL1 Remember
4. Name the components of telemetry system. BTL1 Remember
5. Compile the merits and demerits of current telemetry
system. BTL6 Create
6. List the advantages of radio frequency telemetery system. BTL1 Remember
7. Discuss about land line telemetery system. BTL2 Understand
8. Give the types of telemetry system. BTL2 Understand
9. Discuss about frequency modulation. BTL2 Understand
10. Give the principle of FM Telemetry System. BTL2 Understand
11. Examine PAM and its applications. BTL3 Apply
12. Classify the advantages of FM over AM. BTL3 Apply
13. Classify the advantages and Disadvantages of frequency
division multiplexing. BTL3 Apply
14. Analyze the different types of land line telemetering
system. BTL4 Analyze
15. Point out the disadvantages of radio telemetry system. BTL4 Analyze
16. Point out the need for modulation. BTL4 Analyze
17. Summarize radio frequency telemetry system. BTL5 Evaluate
18. Summarize time division multiplexing. BTL5 Evaluate
19. Define PWM. BTL1 Remember
20. Define PCM. BTL1 Remember
PART – B
1. (i) What is radio frequency telemetry? (3)
(ii) List and explain the various types of modulation
methods.(10)
BTL1 Remember
2. Describe the working principle and operation of following
multiplexing methods:
(i) Frequency multiplexing. (7)
(ii) Time multiplexing. (6)
BTL1 Remember
3. (i) Tabulate the comparison between frequency
modulation and amplitude modulation.(7)
(ii) Write shorts notes on Frequency Modulation and
amplitude modulation.(6)
BTL1 Remember
4. (i) Define and explain the radio frequency telemetry
system with its block diagram.(7)
(ii)Write the basics of frequency and time division
multiplexing. (6)
BTL1 Remember
5. Describe the torque balance telemetering system. (13) BTL2 Understand
6. Discuss in detail about the following.
(i) Pulse Amplitude Modulation (PAM) telemetry. (7)
(ii) Pulse Code Modulation (PCM) telemetry. (6)
BTL2 Understand
7. Describe the different methods of data transmission.
Explain the block diagram of general telemetry system.
(13)
BTL2 Understand
8. (i) Classify the different types of telemetering systems.
(3)
(ii) Explain in detail about the voltage telemetering
system.(10)
BTL3 Apply
9. Examine the position telemetering system and mention its
disadvantages.(13) BTL3 Apply
10. Explain with block diagram, merits and demerits of any
one analog and digital pulse telemetry system. (13) BTL4 Analyze
11. Explain in detail about various types of land line telemetry
system. (13) BTL4 Analyze
12. Explain in detail about various types of pulse modulation
telemetry system. (13)
BTL4 Analyze
13. Explain the frequency modulation telemetry system.(13)
BTL5 Evaluate
14. Generalize the following current telemetering system. (i) Basic current telemetering system. (3)
(ii) Motion balance current telemetering system.(5)
(iii)Force balance current telemetering system.(5)
BTL6 Create
PART-C
1. Explain why it is essential to use radio frequency
telemetry. Summarize it with some relevant examples.
(15)
BTL5 Evaluate
2. Formulate the expressions for modulation index, the
power conveyed by the carrier and the power transmitted
by upper and lower frequency bands . Find the condition
for maximum power in the A.M wave(15)
BTL6 Create
3. A data signal have a frequency component from d.c to 1
kHz is to be transmitted using a modulation method.
Evaluate the minimum carrier channel bandwidth using
the following mwthods of modulation:
(i) Amplitude modulation(5)
(ii) frequency modulation with maximum deviation in
carrier frequency being 1.5kHz(5)
(iii) pulse code modulation using an 8 digit code.(5)
BTL5 Evaluate
4. In a A.M system the carrier has a frequency of 1 MHz .
The permissible width is ±5 kHz . The intelligence which
modulates the carrier , has a bandwidth of 1 kHz . Deduce
the number of transmission channels for efficient use of
transmission media?(15)
BTL5 Evaluate
