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Previous Question Papers
Academic year: 2022

- R15 I YEAR I SEM SUPPLEMENTARY, JUNE 2022
- R18 I Year I Sem Supplementary, June 2022
- R20 I Year I Sem Supplementary, October 2022
- R20 I Year I Sem Regular, July 2021
- R18 I Year Isem Supplementary, October 2020
- R18 I Year I Sem Regular-Supplementary, December 2019
- R18 I Year I Sem Supplementary, February 2021
- R18 I Year I Sem Supplementary, July-August 2021
- R17 I Year I Sem Supplementary, December 2019
- R17 I Year I Sem Supplementary, February 2021

Page1 Code No: R20A0401 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Analog and Digital Electronics

(CSE, IT, CSE -CS, CSE -AIML, CSE -DS, C SE-IOT, AIDS & AIML) Roll No Time: 3 hours Max. Marks: 70 Answer Any Five Questions All Questions carries equal marks.

*** 1 a) Write the differences between ideal and practical diode.

b) Write a short note on volt -ampere characterist ics of a Zener diode .

[7M] [7M] 2 Write a short note on Qualitative theory of P -N Junction and Explain one diode equivalent circuits.

[14M] 3 a) Explain with an example the working of Transistor as an amplifier.

b) Explain α and β Parameters and relat ionship between them.

[7M] [7M] 4 Explain in details the junction transistor. Along with input and output characteristics of common Emitter configuration .

[14M] 5 a) Describe MOSFET and How a FET can behave as a Voltage Variable Resistor.

b)Explain wi th example the principles of JFET Operations [7M] [7M] 6 a) Explain Principles of MOSFET Operation with an example.

b) Give comparison between BJT and FET.

[7M] [7M] 7 a)Convert the following i. (53) 10= ( )2 ii. (133) 8= ( )2

iii. (198) 16= ( )10 b) Explain all the b asic logic g ates with symbols and truth tables [7M] [7M] 8 a) Simplify the following Boolean function using K-Map method

F(A, B, C, D) = Σ m (0, 2, 3, 6, 7, 8, 9, 10, 12, 13) b)Explain De -Morgan’s law with the help of g ates [7M] [7M] **********

R20 Page1 Code No: R20A0011 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Regular/Supplementary Examinations, September 2022

Applied Physics (CSE, IT, CSE -CS, CSE -AIML, CSE -DS, CSE -IOT, AIDS & AIML ) Roll No Time: 3 hours Max. Marks: 70 Answer Any Five Questions

All Questions carries equal marks.

*** 1 A Explain the Construction and working of He -Ne laser.

[10M] B Explain the terms meta stable states and population i nversio n [4M] 2 A Define and derive the expression for acceptance angle and numerical aperture of an optical fiber

[10M] B Determine the numerical aperture, acceptance angle and fraction refractive index change if n 1=1.50 and n2=1.45 [4M] 3 A Derive an ex pression for one dimensional schrodinger time - independent wave

equation.

[10M] B Explain the significance of wave function.

[4M] 4 A Discuss in detail the Davisson and Germer’s experiment .

[10M] B Calculate the velocity and Kinetic energy of elec tron of wavelength 1.66 AO [4M] 5 Discuss in detail about the motion of an electron in a periodic potential by using Kronig -Penny model and its conclusions.

[14M] 6 A Derive the expression for density of state factor [10M] B Distinguish between con ductors, semiconductors and insulators based on their energy band structure.

[4M] 7 Derive an expression for concentration of electrons in intrinsic semiconductor [14M] 8 A If a current 10 mA is current is flowing a circular lop of radius 10 m ts then find the magnetic momentum developed in loop.

[3M] B Discuss the classification of dia, para and ferro magnetic materials based on the basis of magnetic moment [11M ] ********** R20

Page1 Code No: R20A0201 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Basic Electrical Engineering

(EEE & ECE ) Roll No Time: 3 hours Max. Marks: 70 Answer Any Five Questions All Questions carries equal marks.

*** 1 A Explain the number of ways in which the circuit elements can be classified and give examples? [7M] B State and explain Kirchhoff’s Laws.

[7M] 2 A What are the differences between practical and ideal sources? Draw the characteristics of practical sources. [7M] B What is source transformation? Explain how is it useful in reduction of an electric network? What are its limitations?

[7M] 3 A Find the current delivered by the source for the network shown in figure using network reductions technique.

[7M] B Find the Thevenin’ s equivalent for the following circuit.

[7M] 4 A Obtain the equivalent star network for a delta network.

[7M] B Find the current ‘i x’ for the following circuit using superposition theorem.

[7M] R20 Page2 5 A Determine Average value, form factor and peak factor for sinusoidal voltage of crest value V m [7M]

B Explain the terms: real power, reactive power and complex power [7M] 6 A Calculate impedance, current, power factor and real and reactive power consumed by following circuit.

[7M] B Calculate RMS value of the sinusoidal wave waveform.

[7M] 7 A Explain the principal of operation of a transformer ? What are the applications of transformer? Explain how a transformer can perform step -up and step-down operations. [7M] B Derive EMF equation of a generator.

[7M] 8 Explain how ELCB helps in protecting the equipment and operating personal? [14M] **** Page1 Code No: R20A0261 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY

(Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Basic Electrical and Electronics Engineering (ME & AE ) Roll No

Time: 3 hours Max. Marks: 70 Answer Any Five Questions All Questions carries equal marks.

*** 1 Explain the concept of Source transformation and show the procedure to convert Voltage source to Current source and vice -versa.

[14M] 2 A Wha t are the different t ypes of network elements ? Explain the active and passive elements with neat diagrams. [7M] B What are the different types of sources in electrical circuits and Explain Independent and Dependent sources with examples?

[7M] 3 State and Explain Superposition Theorem with one example.

[14M] 4 State and Explain Thevenin’s Theorem with one example.

[14M ] 5 A Explain the P rinciple of operation of transformer. [7M] B Derive the induced e.m.f. equation of transformer [7M] 6 Derive the T orque equation of DC Motor from the fundamentals.

[14M ] 7 What is meant by Diode? Explain the V -I characteristics of P -N junction diode and mention its applications.

[14M ] 8 Explain the A mplifying action Bipolar Junction Transistor (BJT) with Example. [14M ] ********** R20

Page1 Code No: R20A0302 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Computer Aided Engineering Graphics

(EEE & ECE ) Roll No Time: 3 hours Max. Marks: 70 Answer Any Five Questions All Questions carries equal marks.

*** Q1 A Divide a 100 mm long straight line in to eight parts. [7M] B Draw a Regular Pentagon having 35 mm side, using general method.

[7M] Q2 A Construct Pentagon and Hexagon in circle of 90 mm diameter? [7M] B Draw an ellipse with major axis of an ellipse is 100 mm and minor axis is 60 mm long. Use any suitable method [7M]

Q3 Draw the projections of the following points on a common reference line keeping the distance between their projectors 25 mm apart.

A. Point D is 40 mm above the H.P and 50 mm behind the V.P B. Point E is 30 mm below the H.P and 40 mm behind the V.P C. Point A is 30 mm below the H.P and 40 mm in front of the V.P D. Point G is 40 mm below the H.P and 30 mm in front of V.P E. Point F is 40 mm in front of V.P and on the H.P

F. Point B is in the H.P and 30 mm behind the V.P.

G. Point C is 40 mm in front of the V.P and in the H.P [14M] Q4 A line AB of 70 mm long, has its end A at 10 mm above HP and 15 m m in front of VP Its front view and top view measure 50 mm and 60 mm

respectively. Draw the projections of the line and determine its inclinations with HP and VP [14M] Q5 A hexagonal plane of side 30 mm has its surface parallel to and 20 mm in front of V.P. Draw its projections, when a side is Inclined at 45° to the H.P.

[14M] Q6 A hexagonal prism of base 25mm and 45mm long is positioned with one of its base edges on HP such that the axis is inclined at 30° to HP and 45° to VP.

Draw its projections.

[14M] Q7 A Draw the isometric view of a square of side 50 mm kept in Horizontal and Vertical Positions. [7M] B Make the isometric drawing of a cylinder of base diameter 30mm and axis 50mm long.

[7M] R20 Page2 Q8 Draw the (i) Front view (ii) Top View ( iii) Side view of the Following Isometric Drawing (Note: All dimensions are in mm) [14M]

********** Page1 Code No: R20A0301 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India)

I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Engineering Graphics (ME & AE) Roll No Time: 3 hours Max. Marks: 70

Answer Any Five Questions All Questions carries equal marks.

*** 1 Construct a parabola by using general method when the distance between the focus and directrix is 30mm. Also draw the tangent and normal to any point on the curve.

[14M ] 2 Construct an epicycloid of a circle 50 mm diameter which rolls outside of another circle of 100 mm diameter for one revolution. Draw tangent and normal to any point on the curve.

[14M ] 3 A line AB 65mm long has its end A, 10mm above HP and 25mm in front of VP. It is inclined at 65° to HP and 25° to VP. Draw its projections.

[14M ] 4 A line AB , 90 mm long , is inclined at 30 degrees to the H.P. and 20 mm in front of the V.P . Its front view measures 65 mm . Draw the top view of AB and determine its inclination with the V.P.

[14M ] 5 A pentagonal lamina of side 30mm rests on the ground with one of its sides inclined at 30° to VP while the surface of the lamina is inclined at 45º to HP.

Draw the projections of the lamina.

[14M ] 6 Draw the proj ections of a pentagonal prism of 30 mm base edges and axis 60 mm long when the axis is inclined at 75° to the H.P. and parallel to the V.P.

with an edge of the base on the H.P.

[14M ] 7 A hexagonal prism of base side 30mm and axis 60mm is resting on HP o n one of its bases with two of the vertical faces perpendicular to VP. Draw the isometric projection of the prism.

[14M ] 8 Draw the three orthographic views for the following fig [14M ] ********** R20 Page2

1 Code No: R20A0002 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Regular/Supplementary Examinations, September 2022

Professional English (Common to all branches ) Roll No Time: 3 hours Max. Marks: 70 Answer Any Five Questions

All Questions carries equal marks.

*** 1 A B Fill in the blanks with correct forms of verbs:

1. If you heat ice it (melt) 2. If she (study) Mandarin, she would have gone to China.

3. If I (be) the Prime Minister of India, I would make you my secretary.

Define the following Technical Vocabulary:

1. Agenda :

2. Bid :

3. Capital :

4. Conference Call : [3M] [4M] C D Fill in the blanks with correct forms of verbs:

1. The door (open) if you turn the knob.

2. If he (hit) a boundary we would have won the match.

3. I would inform the police if I (be) you.

4. We (be)late if we don’t hurry.

Briefly describe the 3 types of sentences to be written in a paragraph. [4M] [3M] 2 A Define a clause. How many types of ‘If’ clauses are there? Explain with apt examples. [7M] B Explain in detail the important features of a paragraph. Use appropriate

examples.

[7M] 3 A B Fill in t he blanks :

1. The pen I bought is lost.

2. The boy is lazy deserves punishment.

3. The reason he resigned is not known.

4. We were shown the hut in Gandhiji used to live.

Explain the transitive and intransitive verbs with examples : [4M] [3M] C What is abstract writing? Explain the features of abstract writing. [7M] 4 A

B Explain the following idioms:

1. Hit the Road 2. Kick the bucket 3. Call it a day 4. Once in a blue moon Explain the major components of an abstract. [4M]

[3M] R20 2 C D Combine the given sentences to form simple sentences.

1. He was tired of walking. He sat down to rest.

2. He finished his dinner. He went out for a walk.

3. I speak the truth. I am not afraid of it.

4. Health is very important. It must not be neglect ed.

Do as directed :

1. I met my old friend. He is now a Police Inspector. (Combine the sentences to form a Complex sentence).

2. Hari is my brother. Hari is a doctor. (Combine the sentences to form a Comp ound sentence).

3. Tagore was a painter. He was also a poe t. (Rewrite using ‘Besides…..) [4M] [3M] 5 A Write a Job application letter to the Director of a reputed company as you

had a glance at the advertisement in the news paper. [7M] B Expand the following abbreviations:

1. ATM 2. SIM 3. PIN 4. WHO 5. PAN

6. CBI 7. NASA [7M] 6 A B

C Write all the auxiliary verbs with example s.

Correct the following sentences using the appropriate auxiliary verbs.

1. My grandparents coming tomorrow.

2. We not go to the college yesterday.

3. They done the painting themselves last week.

4. Was the glass broked when you took it out?

Do as directed:

1. Kilimanjaro is the highest mountain in Africa. (Change into Comparative degree).

2. The Nile is longer than any other rivers in the world. (Change into Superlative degree).

3. Supriya is more i ntelligent than any other girls in the class. (Change into Superlative degree).

[7M] [4M] [3M] 7 Write an application for the post of ‘Systems Analyst’ in a reputed Company.

(Resume) [14M] 8 A What is report writing? Explain the components of a T echnical Report in detail. [7M] B Explain homonyms, homophones and homographs with three examples each. [7M]

***** Page1 Code No: R20A0022 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India)

I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Mathematics -II (Common to all branches ) Roll No Time: 3 hours Max. Marks: 70

Answer Any Five Questions All Questions carries equal marks.

*** 1 A Find the real root of the equation 𝑥3−𝑥−4=0 using Regula -Falsi method. [7M] B Findf(2.5)using Newton’s forward formula from the following table x 0 1 2 3 4 5 6

f(x) 0 1 16 81 256 625 1296 [7M] 2 A Find a positive root of the equation 𝑥3−𝑥−1=0 correct to two decimal places by Bisection method. [7M] B Using Lagrange’s formula, fit a polynomial to the below given table

x 0 1 3 4 f(x) -12 0 6 12 [7M] 3 A Fit a straight line to the following data by method of least squares x 0 5 10 15 20 25

y 12 15 17 22 24 30 [7M] B Find y(0.1), y(0.2) using RungeKutta fourth order method given that 𝑦′=𝑥+𝑥2𝑦,𝑦(0)=1 [7M] 4

A Fit a second degree polynomial to the following data by the method of least squares x 0 1 2 3 4 y 1 1.8 1.3 2.5 6.3 [7M]

B Solve 𝑑𝑦𝑑𝑥=𝑥+𝑦,𝑦(1)=0. Find y(1.1) and y(1.2) by Taylor’s series method. [7M] R20 Page2 5 A Solve 𝑥(𝑦−𝑧)𝑝+𝑦(𝑧−𝑥)𝑞=𝑧(𝑥−𝑦)

[7M] B Solve 𝑝𝑥+𝑞𝑦=𝑝𝑞 [7M] 6 A Form the partial differential equation by eliminating arbitrary function ∅ from: 𝑥𝑦𝑧 =∅(𝑥2+𝑦2+𝑧2) [4M] B Solve by Method of separation of variables,

𝑢𝑥=2𝑢𝑡+𝑢 , 𝑢(𝑥,0)=6𝑒−3𝑥 [10M] 7 A Evaluate ()xy x y dxdy+ over the region R bounded by 𝑦=𝑥2 and 𝑦=𝑥 [7M] B Evaluate the integral by changing to polar co -ordinates ()22

00xye dx dy−+ [7M] 8 A Prove that 𝑑𝑖𝑣 (𝑔𝑟𝑎𝑑 𝑟𝑚)=𝑚(𝑚+1)𝑟𝑚−2, 𝑟=|𝑟̅| [7M] B Evaluate by Green’s Theorem ∮(𝑦−sin𝑥) 𝑑𝑥+cos𝑥 𝑑𝑦 where 𝐶 is the region bounded by 𝑦=0,𝑥=𝜋

2 ,𝜋𝑦=2𝑥. [7M] ********** Page1 Code No: R20A0502 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India)

I B.Tech II Semester Regular/Supplementary Examinations, September 2022 Python Programming (Common to all branches ) Roll No Time: 3 hours Max. Marks: 70

Answer Any Five Questions All Questions carries equal marks.

*** 1 A Analyze Various Numeric Data Types in Python with examples. [7M] B Write a python script to perform swapping of two numbers [7M] 2 A Give a not e on each of the below Python language constructs:

(i) quotes (single, double and triple) (ii) multiline statements (iii) indentation [7M] B Discuss about Data Type conversions in Python with clear examples . [7M] 3 A What is if statement and explain about the if- else with examples . [7M] B Display the following pattern using python script.

1 12 123 1234 12345 [7M]

4 A Name Various operators in Python? Describe specifically about identity and membership operato r? [7M] B Write the syntax for chained conditional (if - elif -else) statement with program.

[7M] 5 A Differentiate Global and Local Variables. [7M] B State the looping control statements and give an example for each one. [7M] 6 A List and explain different arithmetic operators supported by Python. [7M] B Write a Python program to print all prime numbers less than 256. [7M]

7 A What is lambda function? What are the characteristics of a lambda function?

Give an example. [7M] B Write a Python P rogram to illustrate Exception Handling. [7M] 8 A What is Data Structure ? How Implement it? [7M] B Write a Python Program to Implement Queues? [7M] ***

R20