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Previous Question Papers
Academic year: 2021

- 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

Page 1 of 1 Code No: R15A0012 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Supplementary Examinations, July 2021 Engineering Physics-II

(Common to all branches) Roll No Time: 3 hours Max. Marks: 75 Answer Any Five Questions All Questions carries equal marks.

*** 1 Calculate atomic packing factor for SC, BCC and FCC structures [15M] 2 Derive an expression for the cohesive energy of a diatomic molecule [15M] 3 Discuss how X -ray powder method can be used for the determination of crystal parameters [15M]

4 Derive an expression for concentration of Schottky defects in an ionic crystal [15M] 5 Derive expressions for electronic and ionic polarizabilites [15M] 6 Describe with a neat diagram about the generation of ultrasonic wave by piezoelectric method [15M] 7 Explain the properties of Dia, Para, Ferro, Anti Ferro, Ferri Magnetic properties

[15M] 8 Describe the process of “sol -gel” method in the fabrication of Nano materials [15M] ****** R15 *** Code No: R15A0022

MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Supplementary Examinations, July 2021 Mathematics-II (Common to all branches)

Roll No Time: 3 hours Max. Marks: 75 Answer Any Five Questions All Questions carries equal marks.

**** 1 a) b) 2a) b)

Using Regula - falsi method, find approximate root of the equation x3-x-4 =0 Find y(1.6) using Newton’s forward interpolation formula from the table x 1 1.4 1.8 2.2 y 3.49 4.82 5.96 6.5 Find a real root of the equation xlog 10(x) = 1.2 which lies between 2 and 3

by Bisection method. Using Gauss backward difference formula, find y(8) from the following data:

x 0 5 10 15 20 25 y 7 11 14 18 24 32 [7M] [8M] [8M]

[7M] 3 4 Evaluate∫11+𝑥𝑥1

0𝑑𝑑𝑑𝑑 i) ByTrapezoidal Rule ii) By Simpson’s 1/3rd Rule iii)By Simpson’s 3/8 th Rule Solve dy/dx = x + y, given y(1) = 0.Find y(1.1) and y(1.2) by Taylor’s series method [15M] [15M]

5 6 Expand f(x) = x sin x, as a Fourier series in (0 ,2 𝜋𝜋) Find the half range sine series for f(x) = x ( 𝜋𝜋 – x) in 0

1/13 - 1/ 33 + 1 /53 - 1/ 73 + … = 𝜋𝜋3 / 32 [15M] [15M] 7 Solve a) p2 + q2 = x + y

b) x (y -z)p + y (z -x)q = z(x -y) [7M] [8M] 8 Verify Green’s theorem for ∮(3𝑑𝑑2−8𝑦𝑦2)𝑑𝑑𝑑𝑑+(4𝑦𝑦−6𝑑𝑑𝑦𝑦)𝑑𝑑𝑦𝑦 where C is

bounded by y = √𝑑𝑑 and y = x [15M] R15 Page 1 of 1 Code No: R15A0502 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India)

I B.Tech II Semester Supplementary Examinations, July 2021 Object Oriented Programming (Common to all branches) Roll No Time: 3 hours Max. Marks: 75

Answer Any Five Questions All Questions carries equal marks.

*** 1 List the drawbacks of conventional programming. Explain how object oriented programming overcome them. [15M] 2 Explain structure of a C++ Progra m with suitable example? [15M] 3 What is an object? How is it different from an ordinary variable and a class?

Explain with an example. [15M] 4 Write a program for calculating the total marks and Grade of the 60 students in a class. [15M] 5 How will you destroy the objects initialized by the constructor in the program?

Explain? [15M] 6 What are different types of inheritance supported by C++? Give an example for each. [15M] 7 Explain Run time polymorphism with suitable example? [15M] 8 Define template . What is the need for templates in programming? Write C++ code

that declares a Template class. [15M] ****** R15 Page 1 of 2 Code No: R15A0201

MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Supplementary Examinations, July 2021 Electrical Circuits (ECE, CSE & IT)

Roll No Time: 3 hours Max. Marks: 75 Answer Any Five Questions All Questions carries equal marks.

**** 1 Find the power absorbed by each element in the following circuit.

[15M] 2 Use Kirchhoff’s laws to determine ‘v x’ in the following circuit [15M] 3 Derive the necessary equations for star to delta and delta to star transfomration [15M]

4 Determine the mesh currents in the following circuit [15M] 5 Calculate effective values and average value of the following voltage waveform shown in Figure. [15M] R15

Page 2 of 2 6 Find the equivalent impedance for a given network at an operating frequency of 5 rad/sec.

[15M] 7 Find the maximum power transferred to load in the following circuit.

[15M] 8 Explain the working of transformer and derive the emf equation of a transformer. [15M] *** Page 1 of 1

Code No: R15A0013 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Supplementary Examinations, July 2021 Engineering Chemistry

(ME & AE) Roll No Time: 3 hours Max. Marks: 75 Answer Any Five Questions All Questions carries equal marks.

*** 1 Derive the Nernst equation for single electrode . [15M] 2 Discuss about construction, functioning, advantages and applications of Hydrogen -Oxygen fuel cell [15M] 3 What are the factors affecting the rate of corrosion with respect to nature of metal

and environment? [15M] 4 Describe (a) sacrificial anodic protection (b) impressed current cathodic protection [7M]

[8M] 5 Explain the preparation, properties and use s of PVC in detail [15M] 6 Write about preparation and applications of Poly vinylacetate and Poly lactic acid [15M] 7 How is the softening of water carried out using the Zeolite process? Explain with a neat labelled diagram. [15M]

8 Give the significanc e of ultimate analysis and proximate analysis. [15M] ****** R15 Page 1 of 2 Code No: R15A0302

MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech II Semester Supplementary Examinations, July 2021 Engineering Drawing (ME & AE)

Roll No Time: 3 hours Max. Marks: 75 Answer Any Five Questions All Questions carries equal marks.

*** 1 Construct parabola when the distance of the focus from the directrix is equal to 50 mm, using general method and also draw normal and tangent at convenient location. [15M] 2 Draw a cycloid of a cir cle of radius 30 mm. Also draw tangent and normal of the

cycloid. [15M] 3 A point P is 50 mm from both the reference planes. Draw its projections in all possible positions. [15M] 4 A line PQ of length 80 mm is 15 mm above HP and 20 mm infront of VP The line

is inclined at angle of 300 to HP and 450 to VP. Draw the projections of the line and find the final views.

[15M] 5 A regular hexagon of 25 mm side has one side on the ground. Its plane is inclined at 30° to the H.P and perpendicular to the V.P. Draw its projections.

[15M] 6 Draw the projections of a square pyramid, base 30 mm side and axis 60 mm long, having its base on the H.P. and one of the edges of the base inclined at 30 ° to the V.P.

[15M] 7 Draw the isomet ric view of the following (All Dimensions are in mm) [15M] R15 Page 2 of 2 8 Draw the following views

(i) Front view. (ii)Top view.

(All Dimensions are in mm) [15M] **********