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Previous Question Papers
Academic year: 2021.0

- 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, July-August 2021

Page 1 of 1 Code No: R17A0013 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations, February 2021

Engineering Chemistry (EEE, ECE, CSE & IT) Roll No Time: 2 hours 30 min Max. Marks: 70 Answer Any F ive Questions

All Questions carries equal marks .

*** 1 a) What is Conductometric titration? How do you know the concentration of unknown strong acid using known strong base by conductometric titration?

b) Calculate the equivalent and specific conductance of 0.01N KCl solution which is offering a resistance of 400 ohms at 250C.The cell constant of conductivity cell used is 0.99cm-1. [10M ] [4M] 2 a) Determine the PH of unknown solution by using Glass electrode.

b) Write the construction and working of Lead–acid battery with neat diagram and chemical equations. [7M] [7M] 3 a) Define Corrosion. Write a note on causes and effects of corrosion.

b) Write in brief factors effecting the rate of corrosion. [7M] [7M] 4 a) Discuss the vari ous types of hot dipping method of metal coatings with neat diagram.

b) Write the procedure involved in electroless plating of Ni and write its advantages and applications. [7M] [7M] 5 a) Write the differences between thermoplastic and thermosetting resins.

b) Explain the preparation, properties and uses of the Nylon- 6, 6. [7M] [7M] 6 a) Explain the preparation, properties and uses of the Buna -S rubber.

b) Write a detailed note on application of Nano materials. [7M] [7M] 7 a) Discuss the Ion exchange process for the removal of dissolved impurities.

b) What are the specifications of potable water? How is it sterilized by chlorination [10M ] [4M] 8 a) Explain in detail Ultimate analysis of coal and its significance.

b) Write a short note on Octane number. [10M ] [4M] ******* *** R17 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, February 2021 Engineering Drawing

(EEE, ECE, CSE, IT ) Roll No Time: 2 hours 30 min Max. Marks: 70 Answer Any F ive Questions All Questions carries equal marks .

*** 1 Construct a parabola when the distance between focus and the directrix is 40mm.

Draw tangent and normal at any point P on your curve . [14M ] 2 Draw an epicycloid o f rolling circle 40mm, which rolls out side another circle of 150mm diameter for one revolution. D raw a tangent and normal at any point on the curve . [14M ] 3 Draw the projections of the following points on a common reference line

(i) 35mm above HP and 25mm in front of VP .

(ii) 40mm below HP and 15mm behind VP .

(iii)50mm above HP and 25mm behind VP .

(iv) 45mm below HP and 25mm behind VP . [14M ] 4 A line AB 120mm long is inclined 450 to HP and 300 to VP. Its mid - point C is in VP and 20mm above HP. The end A is in third quadr ant and B is in first quadrant.

Draw the projections of the line . [14M ] 5 A thin cylinder metal plate of 48mm diameter, having its plane vertical and inclined at 400 to VP. Its centre is 33 mm above HP and 25 mm in front of VP.

Draw its projections and lo cate its traces . [14M ] 6 A pentagonal prism, side of base 25 mm and axis 50 mm long, rests with one of its edges on HP such that the base containing that edge makes an angle of 300 to HP and its axis is parallel to VP. Draw its projections . [14M ] 7 A cyl inder disc of 20 mm diameter and altitude 20 mm is placed vertically at the

center of the rectangular face of a hexagonal prism of 28 mm sides and axis 60 mm. Draw the isometric projection of the combination .

[14M ] 8 Draw the sectional front view, top v iew and side view of a given object [14M ] R17 Page 2 of 2 ********** 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, February 2021 Engineering Mechanics

(ME & AE) Roll No Time: 2 hours 30 min Max. Marks: 70 Answer Any F ive Questions All Questions carries equal marks .

*** 1 a) What is couple? Explain with neat diagram b) Find the resultant of given system forces as shown in figure.

[2M] [12M ] 2 a) Find the resultant of the two forces whose magnitud es are 20KN and 50 KN acting an angle of 60 0 with each other, using Law of parallelogram of forces.

b) Define moment of forces and define Varignon’s theorem. [10M ] [4M] 3 a) Differentiate between equilibrium and resultant b) Determine tension in cables AB and AC t o hold 40kg load shown in figure.

[4M] [10M ] 4 a) Define angle of repose and coefficient of friction.

b) A block overlaying a 100 wedge on a horizontal floor and leaning against a vertical wall and weighing 15 kN is to be raised by applying a horizontal force to wedge. Assuming the coefficient of friction between all the surfaces in contact to be 0.3, determine the minimum horizontal force, to be applied to rise the block. [2M]

[12M ] 5 a) Derive an expression for center of gravity in the case of solid right cir cular cone b) Find the centroid of section shown below [7M] [7M] R17 Page 2 of 2

6 A square hole is punched out of a circular lamina as shown in the figure. The diagonal of the square which is punched out is equal to the radius of circle. Find the centroid of remaining la mina.

[14M ] 7 a. State the theorem of parallel axis and prove the same.

b. For a uniform thin square plate of mass m , determine its mass moment of inertia about the y axis, which passes through its gravitational center G.

[7M] [7M] 8 Define v x and v y of rectangular components in curvilinear motion.

A motorist is travelling on a curved road of radius 200 m at a speed of 72 km/hr. Find the normal and tangential components of acceleration. If he applies brakes to slow down his car uniformly to a speed of 36 km /hr in 10 sec find the normal and tangential components of deceleration just after the brakes are applied. [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, February 2021 Engineering Physics -I (EEE, ME, ECE, CSE, IT & AE)

Roll No Time: 2 hours 30 min Max. Marks: 70 Answer Any F ive Questions All Questions carries equal marks .

***** 1 a). Describe Newton’s rings experiment to determine wave length of light.

b). Write a short note on coherent sources. [10M] [4M] 2 Explain with necessary theory , the Fraunhofer diffraction due to single slit [14M] 3 a). What are Einstein’s coefficients? Derive the relation between them.

b). What do you understand by Population Inversion and Met a Stable State. [10M] [4M] 4 a). Derive Numerical aperture in terms of fractional difference in refractive indices.

b). Write any four applications of optical fibers. [10M] [4M] 5 a). Explain de -Broglie’s hypothesis of matter waves.

b). Describe Dav isson and Germer’s experiment. [4M] [10M] 6 a). Derive an expression for time independent Schrodinger’s wave equation.

b). Write about the physical significance of wave function. [10M] [4M] 7 a). Distinguish Maxwell -Boltzmann, Bose -Einstein, Fermi -Dirac statistical distributions.

b). Discuss Bloch theorem. [10M] [4M] 8 a). Distinguish between Direct and indirect band gap semiconductors.

b). Explain with neat diagram, the construction and working of Solar Cell. [6M] [8M] ********** R17 Page 1 of 1

Code No: R17A0021 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations, February 2021 Mathematics -I

(EEE, ME, ECE, CSE, IT & AE) Roll No Time: 2 hours 30 min Max. Marks: 70 Answer Any F ive Questions All Questions carries equal marks .

*** 1 Reduce the following matrix A in to normal form and hence find its rank

−−−−−−−7 0 362 3 134 2 1 11 1 32 [14M]

2 Find the Eigen values and the corresponding Eigen vector of the matrix A = [14M] 3 Prove that[14M]

4 Prove that the functions u=xy+yz+zx, v= ++, w=x+y+z are functionally

dependent and find the relation between them.

[14M] 5 a) Solve [7M] b) Solve

[7M] 6 A body is originally at and cools down to in 20 minutes. If the temperature of the air is

, find the temperature of the body after 40 minutes.

[14M] 7 a) Solve [7M] b) Apply the method of variation of parameters, Solve [7M]

8 State Green’s Theorem and Verify Green’s theorem for where c is bounded by y=x and y= [14M] ********** R17

Page 1 of 2 Code No: R17A0501 MALLA REDDY COLLEGE OF ENGINEERING & TECHNOLOGY (Autonomous Institution – UGC, Govt. of India) I B.Tech I Semester Supplementary Examinations, February 2021

Computer Programming with C (EEE , ME, ECE, CSE, IT & AE) Roll No Time: 2 hours 30 min Max. Marks: 70 Answer Any F ive Questions

All Questions carries equal marks .

**** 1 a) Sketch a neat diagram of digital computer organization and explain about its each unit.

b) Build an algorithm and draw flowchart for finding grea test among three given numbers. [7M] [7M] 2 a) Why C language supports many data types? Predict the effect of mixing types in C. Explain briefly the numeric types supported by C.

b) Write a program to check whether the given num ber is “Even” or “Odd”. [8M] [6M] 3 a) Write a function isprime(num) that accepts an integer argument and returns 1 if the argument is a prime or 0 otherwise. Write a program that invokes this function to generate prime n umbers between the given ranges.

b) Write short notes on nested functions. [9M] [5M] 4 a) Write a C program find the greatest common divisor (GCD) of two numbers using a recursive functions.

b) How many types of storage classes do C supports? Identify the necessity of each [8M] [6M] 5 Write a C program to read N integers into an array A. Perform the following operations and display the results with appropriate headings.

(i) sum of odd numbers, (ii) sum of even numbers, (iii) average of all numbers.

(iv) largest element in an array (v) smallest element in an array (vi) average of largest and smallest element . [14M] 6 a) Build a program to replace each constant in a string with the next one except letter „z‟ „Z‟ and „a‟ „A‟ . Thus the string “Programming in C is

fun” should be modified as “Qsphsannjoh jo D jt gvo”.

b) Write a C Program to implemen t string copy operation STRCOPY(str1,str2) [10M] [4M] R17 Page 2 of 2 7 a) Write a C program to swap two numbers using call by address (pointers or

reference) method .

b) Relate array with pointers and i llustrate with suitable examples. [7M] [7M] 8 a) Contrast an array with structures .

b) Write a program to read and display information [rollno, name, fees, DOB (dateofbirth)] of all students in the class.

[5M] [9M] **********