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Previous Question Papers
Academic year: 2019.0

- 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, February 2021
- R17 I Year I Sem Supplementary, July-August 2021

Page 1 of 1 Code No: R17A0501 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019 Computer Programming with C

(EEE, ME, ECE, CSE, IT & AE) Roll No Time: 3 hours Max. Marks: 70 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE Question from each SECTION and each Question carries 1 4 marks.

*** SECTION -I 1 a) Draw a flowchart to find the roots of quadratic equation.

b) State and explain various jumping statements in c. [7M] [7M] OR 2 a) Explain about operator precedence and associativity . Write the precedence table for various operators in C.

b) Differentiate between entry control and exit control statem ents with examples. [7M] [7M] SECTION -II 3 Define function? List out various categories of functions with examples. [14M] OR

4 Describe about storage classes in c with examples. [14M] SECTION -III 5 Explain about creation , storing and accessing of array elements in 2DA.

Prepare a C program to find multiplication for the given two matrices. [14M] OR 6 List and e xplain about string manipulation functions with examples. [14M] SECTION -IV 7 Compare static memory allocat ion with dynamic memory allocation. List and

explain dynamic memory allocation functions with example program. [14M] OR 8 Distinguish between actual arguments and formal arguments. Explain about call by reference mechanism with an example. [14M] SECT ION -V

9 Define a structure .How do you create structure objects? Construct a c program which contains an employee structure ,assume the suitable fields and find out the average salary of 10 emplo yees using array of structures. [14M] OR 10 a) Write a C program to copy the content of one file to another file.

b) Define a file? List and explain about the various files input/output functions. [7M] [7M] ********** R17 Code No: R17A0013

MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019 Engineering Chemistry (EEE, ECE, CSE & IT)

Roll No Time: 3 hours Max. Marks: 70 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE Question from each SECTION and each Question carries 1 4 marks.

*** SECTION -I 1 a)Define electrode potential. Derive Nernst equation.

b)What is electrochemical series? Give its five applications. [7M] [7M] OR 2 a)Define battery. Write the composition, discharging , recharging cell reaction of lead -acid battery.

b)What is an electrochemical cell? Explain the construction and working of Galvanic Cell with a neat diagram. [7M] [7M] SECTION -II 3 Explain with neat diagram how corrosion can be minimized by cathodic protection, hot

dipping, metal cladding and electro less plating. [14M ] OR 4 a)What is dry corrosion? State Pilling -Bedworth rule.

b)Explain Electro chemical corrosion. [7M] [7M] SECTION -III 5 a)Write preparation, properties and engineering applications of Buna -s and Thiokol rubber.

b)What is vulcanization of rubber? Mention its uses. [7M] [7M] OR 6 a)Give preparation, properties and applications of PVC & Bakelite.

b) What are the characteristics of a good refractory? How they are classified? [7M] [7M] SECTION -IV 7 a)How water is softened by Ion exchange process? Write its advantages and disadvantages.

b) Explain EDTA method for estimation of hardness of water. [7M] [7M] OR 8 a)Illustrate the process of disinfection of potable water by Ozone treatment and Reverse osmosis.

b)What are boiler troubles? Describe the causes, effects and preventive measures of scales and sludges [7M] [7M] SECTION -V 9 a)What is petrol? How is it synthesized by Fischer – Tropsch’s process? [7M] R17

b)Write the composition, calorific value and applications of LPG and CNG. [7M] OR 10 a)How does carbon and hydrogen determine in the ultimate analysis of coal.

b)Describe the determination of calorific value of fuel by Junker‘s gas calorimeter. [7M] [7M] ********** Page 1 of 2 Code No: R17A0302

MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019 Engineering Drawing (EEE, ECE, CSE & IT)

Roll No Time: 3 hours Max. Marks: 70 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE Question from each SECTION and each Question carries 1 4 marks.

*** SECTION -I 1 Construct a parabola, with distance of the focus from the directrix as 60 mm and also draw normal and tangent to the curve at a point 40 mm from the directrix.

Also draw a tangent & normal to the curve at a point 55mm from the directrix.. [14M ] OR 2 Draw the locus of a point on the circumfe rence of a circle of a radiu s 25 mm which rolls on a straight line for one revolution of the circle. Take the initial position of the point on the straight line. [14M ]

SECTION -II 3 The projectors of the ends of a line AB are 60 mm apart. The end A is 30 mm above the H.P. and 40 m m in front of the V.P. The end B is 20 mm below the H.P.

and 50 mm behind the V.P. determine the true length and its inclinations with two planes using trapezoidal method. [14M ] OR 4 A line PQ, 64 mm long has one of its end 20 mm in front VP and 35 mm above

HP. The line is inclined at 400 to HP and 250 to VP. Draw its top and front views. [14M ] SECTION -III 5 A hexagonal plate of side 40mm is resting on a corner in VP with its surface making an angle of 300 with the VP. The front view of the diagon al passing through that corner is inclined at 450 to the line HP. Draw the projections of the

plate. [14M ] OR 6 A hexagonal prism, having a base with a 30mm side and an 80mm long axis ,rests on one of its base edges in the H.P such that the axis is inc lined at 300 to the H.P and 450 to the V.P Draw its projections? [14M ]

SECTION -IV 7 Draw an isometric view of a pentagonal pyramid having a base , with a 40 mm side and 70mm long axis (a) when the its axis is vertical (b) when the its axis is horizontal? [14M ] OR

8 Draw an isometric view of Cone with a 60 mm base diameter, and 60mm long axis, resting on its base on the HP? [14M ] SECTION -V 9 Draw Front View, top view and side view for the part shown in figures. All dimensions are in mm. [14M ] R17

Page 2 of 2 OR 10 Draw the isometric view of the given orthographic projections of the object .

[14M] ********** Page 1 of 2 Code No: R17A0301 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY

(Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019 Engineering Mechanics (ME & AE) Roll No

Time: 3 hours Max. Marks: 70 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE Question from each SECTION and each Question carries 1 4 marks.

*** SECTION -I 1 Compute the resultant force for the system shown figure.

[14M ] OR 2 Determine the couple of three forces about Point P for the force system shown below:

[14M ] SECTION -II 3 Determine the resultant of the system of concurrent forces shown below:

[14M ] R17 Page 2 of 2 OR 4 Two rollers of the same diameter are supported by an inclined plane and a vertical

wall as shown in figure. The upper and the lower rollers are respectively 200N and 250N in weight. Assuming smooth surfaces, find the reactions induced at the points of supports A, B, C and D.

[14M ] SECTION -III 5 Locate the centroid of the I section given below:

[14M ] OR 6 Derive the expression to locate Centroid of the semi circle geometry from the centre taking diagnol as reference pla ne. R is the radius of semi circle. [14M ] SECTION -IV

7 Draw an hallow rectangular section with width 100mm ,height 150mm and thickness 10mm. Calculate the moment of inertia with respect to horizontal and vertical axis.Also calculate product of inerti a. [14M ] OR 8 Determine the mass moment of inertia of right angled triangle about base and

centre of gravity. Its base dimension b and height h. [14M ] SECTION -V 9 The rectilinear motion of a particle is defined b y the displacement –time eaquation x=x0(2ekt –e-2kt). Find maximum velocity of the particle.x 0 and k are constants. [14M ] OR

10 A shaft of radius r rotates with constant speed w in bearings for which the coefficient of friction is µ. Through what angl e Ɵ will it rotate after driving torque is removed? [14M ] ********** Page 1 of 1

Code No: R17A0011 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019 Engineering Physics-I

(EEE, ME, ECE, CSE, IT & AE) Roll No Time: 3 hours Max. Marks: 70 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE Question from each SECTION and each Question carries 1 4 marks.

**** SECTION -I 1 a) With a ray diagram discuss the interference in thin f ilms by reflected light b) Write the difference between Interference and diffraction. [10M] [4M]

OR 2 a) What is the polarization of light? Explain the types of polarization of light b) Explain the principles, construction and working of a Nicol pri sm with a neat diagram [4M] [10M ]

SECTION -II 3 a) What are Einstein’s coefficients? Derive relation between them.

b) Write few applications of lasers. [10M ] [4M] OR 4 a) Draw the block diagram of an optical fiber communication system and explain

the function of each block.

b) Describe the graded index optical fiber and explain the transmission of signal through it. [8M] [6M] SECTION -III 5 a) What are matter waves? Derive an expression for de – Broglie wavelength

b) Calculate the velocity and k inetic energy of an electron of wave length 1.66 A0 [10M ] [4M] OR 6 a) Describe Davisson and Germer’s experiment to verify the wave nature of electrons .

b) State and explain Heisenberg’s uncertainity principle. [10M ] [4M] SECTION -IV 7 Explain the K ronig penny model in detail. [14M ] OR

8 a) On the basis of band theory how the crystalline solids are classified into metals, semiconductors and insulators.

b) Derive an expression for density of states. [4M] [10M ] SECTION -V 9 a) Distinguish bet ween intrinsic and extrinsic semiconductors b) Derive an expression for the carrier concentration of electrons in N – type

semiconductors. [4M] [10M ] OR 10 a) Explain the construction and working of a Solar cell.

b) Distinguish between direct and indir ect band gap semiconductors. [10M ] [4M] ********** R17 Page 1 of 1 Code No: R17A0014

MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019 Environmental Studies (ME & AE)

Roll No Time: 3 hours Max. Marks: 7 0 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE Question from each SECTION and each Question carries 1 4 marks.

*** SECTION -I 1 Differentiate food chain and food web and explain any two biogeochemical cyc les with neat sketch? [14M ] OR

2 Define biomagnification and bioaccumulation with examples and describe multidisciplinary nature of environmental studies? [14M ] SECTION -II 3 a. Classify aquifers and write the impacts related to ground water depleti on?

b. What are the causes and consequences of deforestation? [7M] [7M] OR 4 a. Explain the upstream and downstream impacts by big dams?

b. Write a note on renewable energy sources. [7M] [7M] SECTION -III 5 a. Define endemic and endangered specie s and list out any four species to each category?

b. How can we conserve biodiversity? [7M] [7M] OR 6 Briefly explain the values of biodiversity and threats to biodiversity?

[14M ] SECTION -IV 7 Write about the classification, sources, effects and control measures of air pollution? [14M ] OR

8 Explain solid waste management and e -waste management?

[14M ] SECTION -V 9 Explain the concept, threats and strategies of sustainable development?

[14M ] OR 10 Explain EIA methodology and EMP plannin g strategies. [14M ] ********** R17

Page 1 of 2 Code No: R17A0021 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , December 2019

Mathematics-I (EEE, ME, ECE, CSE, IT & AE) Roll No Time: 3 hours Max. Marks: 70 Note: This question paper Consists of 5 Sections. Answer FIVE Questions, Choosing ONE

Question from each SECTION and each Question carries 1 4 marks.

*** SECTION -I 1 a) Reduce the matrix to echelon form and hence find its rank

5786312323420321 [7M] b) Test for consistency and solve

.32 47 192,13 3 3,5 7 3 2 =−+=−+=+− z y x z yx z y x [7M] OR 2 a) Verify Cayley -Hamilton theorem for the following matrix and find its inverse

−−−−1 2 621 62 2 7 [7M]

b) Find the eigen values and the eigen vectors of the matrix

−− −−34 24 7626 8 [7M] SECTION -II 3 a) Verify Lagrange’s mean value theorem for ()()()()3 2 1 −−−= x x x xf in ()4,0 [7M]

b) Using Taylor’s series, expand ex up to the term containing .5x [7M] OR 4 a) Find ''c of the Cauchy’s mean value theorem on []ba,for xexf=)( and () )0 ,(;> =−ba exgx [10M]

b) Show that the rectangular solid of maximum volume that can be inscribed in a sphere is a cube. [4M] SECTION -III 5 a) Define linear differential equation and s olvexyxy

dxdysin+= [7M] R17 Page 2 of 2 b) Solve 0 1 1 =

−+

+ dyyxe dxeyxyx [7M]

OR 6 a) The temperature of the body drops from 1000C to 750C in 10 minutes when the surrounding air is at 200C .What will be the temperature after half an hour. When will be the temperature be 250C. [7M] b) Find the orthogonal trajectories of the family of cardioids ). cos1(θ+=ar [7M]

SECTION -IV 7 a) Solve ()21 D D yx++ = [7M] b) Solve x xeydxdydxydxsin 222=+− [7M]

OR 8 Solve 22Tandyyxdx+= by the method of variation of parameters [14M]

SECTION -V 9 a) Find the directional derivative of f= x 2 yz+ 4xz2 at the point (1,-2,1) in the direction of the vector 2 i – j- 2k [7M] b) If r= xi+yj+zk then find div r, curl r [7M] OR

10 a) By using Green’s theorem e valuate ()[ ] ∫++Cdyx dxy xy2 2, where C is bounded by y = x and y = x2 [7M] b) Evaluate by Stoke’s theorem [ ] ∫++Cxdz zdy ydx , where C is the curve of

intersection of x2+y2+z2 = a2 and x+z = a [7M] **********