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Previous Question Papers
Academic year: 2020.0

- 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, December 2019
- R17 I Year I Sem Supplementary, February 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 , October 2020

Computer Programming with C (EEE, ME, ECE, CSE, IT & AE) Roll No Time: 2 hours Max. Marks: 70 Answer Any F our Questions

All Questions carries equal marks .

*** 1 a) Draw a flowchart to compute compound interest for the given values .

b) State and explain various looping statements in c.

2 a) Explain about list o f operators supported by C language .

b) Construct a C Program to find whether the given number is Armstrong or not .

3 Describe about types of functions and write pass by value mechanism with example.

4 Explain about various pre -processor directives in C with examples.

5 Brief about creation, storing and accessing of a rray elements in 1 DA.

Prepare a C program to search an element in the array or not using binary search.

6 a) List and e xplain various string i/o functions with ex amples.

b) Write a C Program to check given string is palindrome or not 7 Describe the following with examples:

a) pointer arithmetic b) void pointer 8 State and explain the following keywords with an example:

a) enum b) typedef c) union ********** R17 Code No: R17A0013 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY

(Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , October 2020 Engineering Chemistry (EEE, ECE, CSE& IT ) Roll No

Time: 2 hours Max. Marks: 70 Answer Any F our Questions All Questions carries equal marks .

*** 1 a)What is fuel Cell? Construct H 2-O2 fuel cell. What are the disadvantages and applications of the cell?

b)What are ion selective electrodes? Write the working principle and application of glass electrode.

2 a)What is a concentration cell? Explain the working of an electrolyte concentration cell.

b)Explain the construction and functioning of Ni -Cd cell.

3 Define corrosion of metals. What are different types of corrosion? Explain the mechanism of electrochemical theory of wet corrosion.

4 a)What are the various factors affecting the rate of corrosion. Explain in brief.

b)Corrosion of water filled steel tanks occur below the waterline. Give reason 5 a) What are the various methods for the synthesis of fibre reinforced plastics? Write their applications.

b)What biodegradable polymers? Explain preparation and applications of polylactic acid.

6 a)Explain the classification, mechanism and applications of conducting polymers by taking polyacetylene as an example.

b)Write the structure of natural rubber. What are its disadvantages? Explain how this can be removed by vulcanization. What are the advantages of vulcanization of rubber?

7 What are the types of hardness? Explain the estimation of hardness of water by EDTA complexometric method.

8 a)What is cracking?Discuss the method of fixed bed catalytic cracking.

b)What is Octane number and Cet ane number? What is their significance?

********** R17 Page 1 of 1 Code No: R17A0302 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations , October 2020

Engineering Drawing (EEE, ECE, CSE, IT ) Roll No Time: 2 hours Max. Marks: 70 Answer Any F our Questions

All Questions carries equal marks .

**** 1 Draw an ellipse when the distance of its focus from its directrix is 50 mm and eccentricity is 2/3. Also draw a tangent and a normal to the ellipse at a point 70 mm away from the directrix .

2 If 1 cm long line on a map represents a real length of 4 m. Calculate the R.F. and draw a diagonal scale to measure up to 50 m. Show a distance of 44.5 m on it.

3 A straight line PQ has its end P 20 mm above HP and 30 mm in front of VP and the end Q is 80 mm above H.P. and 70 mm in front of the V.P. If the end projectors are 60 mm apart, Draw the projections of the line. Determine its true length and true inclinations with the reference planes.

4 An 80 mm long line AB is inclined at 300 to the H.P. and 450 to the V.P. The end A is 20mm above the H.P. and lying in the V.P. Draw the projections of the line.

5 A hexagonal plane of sid e 30mm has an edge on the H.P. Its surface is inclined at 450 to the H.P., and the edge on which the plane rests is inclined at 300 to the V.P.

Draw its projections.

6 A pentagonal prism of base side 30mm and height 60mm rests on one of its base side on the H.P. inclined at 300 to the V.P. Its axis is inclined at 450 to the H.P.

Draw its projections.

7 A hexagonal prism of base side 30mm and an axis 50mm has an axially drilled square hole of side 25mm. One of the faces of the square hole is parallel to a face of the hexagon. Draw the isometric projection.

8 Draw Front View, top view and side view for the part shown in figures. All dimensions are in mm.

********** R17 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 , October 2020 Engineering Mechanics (ME & AE) Roll No

Time: 2 hours Max. Marks: 7 0 Answer Any F our Questions All Questions carries equal marks .

*** 1 State Principle of moments. Compute the moment 1500N shown figure about points A and B.

2 Determine the resultants of four forces shown below:

3 Determine the resultant of the system of concurrent forces having the following magnitudes passing through the origin and the indicated points: P = 300 N (+12, +6, −4), T = 500 N (−3, −4, +12) and F = 250 N (+6, −3, −6) .

4 Find the least force P required to move the block in a wedge shown in following figure.

5 Derive expression to Locate the centroid of the triangle along height h from the base of length b.

6 Calculate Centroid of the geometry shown in Figure. R17 Page 2 of 2 7 Consider a rectangle plane with base b and height h. Take origin of x -y-z coordinate system at CG and Derive the expressions for second moment of about both about X and Y axis and Polar moment of Inertia about Z axis is

perpendicular to plane.

8 A car is driven along a straight track with position given by s(t) = 150t – 300 m (t in seconds). Find (a) velocity v(t) (b) acceleration a(t) and (c) the displacement and total distance travelled over the time interval [1, 4].

**** 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 , October 2020 Engineering Physics-I (EEE, ME, ECE, CSE, IT & AE) Roll No Time: 2 hours Max. Marks: 70

Answer Any F our Questions All Questions carries equal marks .

.*** 1 Describe interference in thin films by reflected light and deduce the conditions for bright and dark fringes.

2 a) Describe Newton’s rings experiment to determine wave length of light b) Explain the theory of double refraction.

3 a) Describe the construction, principle and working of He - Ne laser.

b) What do you understand by Population i nversion.

4 a) Derive an expression for numerical aperture of an optical fibe r.

b) Write a brief note on different losses in optical fib ers.

5 a) Derive time independent of Schrodinger’s wave equation for a free particle.

b) Calculate the de Broglie wave length of neutron of energy 28.85 eV .

6 a) Show that t he particle trapped in a potential box possesses discrete energy levels .

b) An electron is bound in one –dimensional infinite well of width 1 x 10-10 m.

Find the energy value of an electron in the ground state and first two exited states .

7 a) Distinguish Maxwell, Boltzmann, Bose – Einstein, Fermi Dirac Statistical distributions b) Distinguish between conductors, semiconductors and insulators on the basis of energy bands.

8 a) Derive an expression for Hall coefficient for a n - type semiconductors .

b) Wr ite few applications of Hall effect .

********** 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 , October 2020 Environmental Studies (ME&AE ) Roll No

Time: 2 hours Max. M arks: 7 0 Answer Any F our Questions All Questions carries equal marks .

*** 1 Explain various energy flow models with neat sketch?

2 Describe structural and functional characteristics of ecosystem?

3 Write about hydrological cycle with neat sketch and explain the impacts related to surface water resources?

4 Describe briefly any four renewable and four non renewable resources?

5 a. Define biodiversity and write about various levels of biodiversity?

b. What is hotspot of biodiversity and explain various methods to conserve biodiversity?

6 Explain the values of biodiversity and threats to biodiversity?

7 Write about the classification, sources, effects and control methods of water pollution?

8 Briefly explain various laws to protect enviro nment?

********** 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 , October 2020 Mathematics-I (EEE, ME, ECE, CSE, IT & AE) Roll No

Time: 2 hours Max. Marks: 70 Answer Any F our Questions All Questions carries equal marks .

1 a) Reduce the matrix to normal form and hence find its rank

543115322321b) Inves tigate for what values of λ and µ the equations ,6=++ zyx µλ=++=++ z y x z y x 2 ,10 3 2 have (i) No solution (ii) Unique solution (iii) An infinite number of solutions 2 a) Verify Cayley -Hamilton theorem for the following matrix and find its inverse

−−−−

21 11 2111 2 b) Find the eigen values and the eigen vectors of the matrix

−−−− −02 16 1 23 223 a) Verify Rolle’s theorem for x xf=)( in []1,1− b) Using Maclaurin’s series, expand xSin .

4 a) If ba<, prove that 21 121tan tan1 aaba bbab

+−<−<+−− −. Using Lagranges mean value theorem deduce: 61434

25341+<<+−π πTan b) Find the maximum and minimum values of 0 ,33 3> −+ a where axy yx 5 a) Define ordinary differential equation and s olve the differential equation 0 tan sec tan sec2 2= + dyx y dxy x

b) Solve()()dyxy dxy −=+−1 2tan 1 6 a) The number N of bacteria in a culture gr ew at a rate pr oportional to N. The value of N was initially 100 and increased to 332 in one hour. What was the value of N after 211 hours R17

Page 2 of 2 b) Show that the family of parabolas ) (42aya x+= is self orthogonal 7 a) Solve () x ey Dx2sin 42+=+ b) Solve () .2sin 8 4 422 2x ex y D Dx=+− 8 a) Find div F and curl F, where F = grad (x3+y3+z3-3xyz)

b) Show that div(grad r m ) = m(m + 1)r m−2 , where r = │r│, r = xi + y j + zk **********