Paper - I : Industrial Engineering & Management …5) a) Explain the building blocks of a Thermal...

(DME 411)

B.Tech DEGREE EXAMINATION, MAY - 2015

(Examination at the end of Fourth Year)

MECHANICAL ENGINEERING

Paper - I : Industrial Engineering & Management

Time : 3 Hours Maximum Marks : 75

Answer question No.1 compulsory (5 × 3 = 15)

Answer ONE question from each unit (4 × 15 = 60)

1) a) Time Study.

b) Productivity

c) SIMO CHART

d) Joint Stock Company.

e) Product life cycle.

UNIT - I

2) a) Define Method Study. Discuss the use of fundamental hand motions (THERBLIGS).

b) Enlist work measurement objectives and Techniques.

OR

3) a) Explain in detail the management techniques to reduce work content and idle time.

b) Explain the methods to measure and improve productivity.

UNIT - II

4) a) Enlist the principles of Plant Layout.

b) Explain the procedure for a work sampling study.

OR

5) a) “Right selection of a plant layout confirms the success of an Enterprise”-Discuss.

b) Explain in detail the principles of Motion Economy.

UNIT - III

6) a) Enlist and explain various forms of Business Organization.

b) What are the various functions of a Personnel Manager.

OR

7) a) Explain the Job analysis and Job design in Personnel Management.

b) “Personnel Manager is the bridge between management and employees”- Justify.

UNIT - IV

8) a) Differentiate between Selling and Marketing.

b) Why market research is essential before launching a product?

OR

9) a) Enlist the functions of finance in an organization.

b) Explain in brief the common methods of depreciation.

(DME 412)

B.Tech. DEGREE EXAMINATION, MAY - 2015

(Examination at the End of Fourth Year)


Paper - II : Advanced Machine Design


Answer question No.1 compulsory (15)


1) a) List out different types of spring materials.

b) List out different types of Brakes.

c) Sketch the parallel reliability system.

d) What are the materials used for lining of friction surfaces?

e) What is the main function of a fly wheel in an engine?

f) Write short notes on Optimum design?

g) Discuss standardization of design process.

UNIT - I

2) a) Explain one method of avoiding the tendency of a compression spring to buckle.

b) A helical spring „B‟ is placed inside the coil of a second helical spring „A‟, having the same

number of coils and free length. The spring are made of the same material. The composite

spring is compressed by an axial load of 2300 N which is shared between them. The mean

diameter of the spring „A‟ and „B‟ are 100 mm and 70 mm respectively and wire diameters

are 13 mm and 8 mm respectively. Find the load taken and the maximum stress in each

spring.

OR

3) a) Classify springs according to their shapes. Draw neat sketches indicating in each case

whether stresses are induced by bending (or) by torsion.

b) A helical spring is to support a load of 1000N. The spring is guided by a rod of 50mm

diameter. The spring undergoes a deflection of 40mm under the load. Determine the diameter

of the wire and the number of turns required, Use C-60 steel with a factor of safety 2?

UNIT - II

4) A multi disc clutch consists of steel and bronze plates. It transmits 15 kW power at 1400 rpm. The

inner and outer diameters of contacting surfaces are 100 and 200 mm respectively. The coefficient

of friction is 0.15 and the permissible intensity of pressure is 0.5 N/mm2. Assume uniform wear

theory. Calculate the number of steel and bronze disks.

OR

5) A differential band brake acting on the 3/4th

of the circumference of a drum of 450mm diameter is

to provide a braking torque of 250Nm. One end of the band is attached to a pin 100mm from the

fulcrum of the lever and the other end to another pin 25mm from the fulcrum on the other side of it

where the operating force is also acting. If the operating force is applied at 500mm from the

fulcrum and the coefficient of friction is 0.2 find the two values of the operating force

corresponding to the two directions of rotation of the drum?

UNIT - III

6) a) Explain the considerations given in the design of pistons for IC Engines.

b) Design a trunk piston for an IC engine. The piston is made of cast iron with an allowable

stress of 38.5 MPa. The bore of the cylinder is 200 mm and the maximum explosion pressure

is 0.4 MPa. The permissible bending stress of the material of the gudgeon pin is 100 MPa,

The bearing pressure in the gudgeon pin bearing of the connecting rod is to be taken as 200

MPa.

OR

7) a) State how the size of the flywheel calculated?

b) Write down the design procedure for a flywheel?

UNIT - IV

8) a) Explain the importance of the reliability and life expectances.

b) Explain series, and parallel and series reliability analysis.

OR

9) Explain the following :

a) Human aspects of a design with a suitable example.

b) Optimum design with a suitable example.

(DME 413)

B.Tech. DEGREE EXAMINATION, MAY - 2015

(Examination at the end of Final Year)


Paper - III : Finite Element Analysis




1) a) Define potential energy and equilibrium. [2]

b) Write about Rayleigh-Ritz method. [2]

c) Define shape function. [2]

d) What do you mean by trusses. [2]

e) Von-mises stress. [2]

f) Discuss about boundary conditions of scalar field problem. [3]

g) Local and global co-ordinates with an example. [2]

UNIT - I

2) a) Derive an expression for principle stress calculation. [7]

b) Discuss in detail about the concepts of FEM formulations. Discuss in detail about the

application of finite element method. [8]

OR

3) Explain the following methods used for the formulation of element characteristics and load

matrices. [15]

a) Variational approach.

b) Weighted residual approach.

UNIT - II

4) a) Differentiate between BAR and TRUSS elements in FEM formulation using an example. [8]

b) Derive the stiffness of axial bar? [7]

OR

5) Consider a bar as shown in figure 1 an axial load of 200 kN is applied at point P. Take area of

element 1 A1 = 2400 mm2 and A2 = 600 mm

2. Young‟s modulus for element (1) & (2) E1 = 70 ×

109 N/m

2 and E2 = 200 × 10

9 N/m

2 respectively.

Calculate the following :

a) Nodal displacement at point P [8]

b) Stress in each material [4]

c) Reaction force [3]

UNIT - III

6) Determine the shape functions N1 , N2 and N3 at the interior point P for the triangular element

shown in figure 2. [15]

OR

7) For a beam of length 2 meters fixed at both ends, estimate the deflection at the centre of beam,

vertical load acting is10 kN. Divide the beam in to two elements. Compare the solution with

theoretical values. Young‟s modulus E = 2 × 1011

N/m2 moment of inertia I = 250 mm

4. [15]

UNIT - IV

8) a) Derive one dimensional steady state neat conduction equation. [7]

b) A metallic fin, with thermal conductivity K = 200 w/moC of 1 mm diameter 50 mm long is

used to enhance heat transfer from a wall maintained at 270oC, the ambient conditions are h

= 15 w/moC T = 25

oC. Compare the temperature distribution with two and three elements

compare with exact solution. [8]

OR

9) An axisymmetric triangular element is subjected to the loading as shown in figure the load is

distributed throughout the circumference and normal to the boundary. Derive all the necessary

equations and derive the nodal point loads. [15]

(DME 414)

B.Tech DEGREE EXAMINATION, MAY - 2015



Paper - IV : Computer Aided Manufacturing & Automation




1) Write a short note on the following :

a) Merits & Demerits of Automation.

b) Unconventional Machining.

c) Differences between CNC and DNC.

d) Punched tape.

e) Adaptive control machining.

f) Canned cycle.

g) MICLASS code.

UNIT - I

2) a) Explain types of transfer lines in automation.

b) What are multi-spindle automatic machines? How they classify?

OR

3) a) Explain working principle and construction of AJM.

b) Write the differences between ECM and EDM.

UNIT - II

4) a) What are the basic components of NC? Explain them.

b) How can you justify that NC machine tool is more accurate and precision that its

conventional counter part?

OR

5) a) Explain in brief about “Machining Centers” in CNC, and DNC‟s.

b) Describe the advantages of CNC over NC.

UNIT - III

6) a) Explain programming languages in CNCs.

b) What is cutter radius compensation? Explain.

OR

7) Write and list out different types of tape formats. Discuss briefly.

UNIT - IV

8) Discuss briefly the parts classification and coding benefits of GT.

OR

9) Distinguish between CAPP and FMS.

(DME 415)

B. Tech. DEGREE EXAMINATION, MAY - 2015



Paper - V : Mechatronics


Answer question No. 1 compulsory (15)

Answer ONE question from each unit (4 x 15 = 60)

1) Answer the following briefly :

a) Define the term sensor. (2)

b) Give two difference between open loop and closed loop systems. (3)

c) List out classification of transducers. (3)

d) Digital to Analog conversion. (3)

e) Discuss the classification of control systems. (2)

f) Name the different timers. (2)

Unit - I

2) a) Describe in detail about selection of sensors. (7)

b) What are the different data presentation elements? Explain any one of them in detail. (8)

OR

3) a) Why signals conditioning elements are necessary. Explain in detail about Quantizing theory.

(8)

b) Explain magnetic recording displays. (7)

Unit – II

4) a) Sketch and explain block diagram representation for 2 degrees of freedom mechanical

system model. (7)

b) Write comparison between Pneumatic and hydraulic actuation systems. (8)

OR

5) a) Explain the building blocks of a Thermal system and show the block diagram. (7)

b) Define system response. Explain the time response analysis of mechanical system. (8)

Unit – III

6) a) What are different types of closed loop controls? Explain PID and two step controller with

diagram? (8)

b) What are Karnaugh maps? Explain them in detail. (7)

OR

7) a) Distinguish between control and discrete process with an example. (8)

b) What are the different types of logic gates? Explain them with truth table. (7)

Unit – IV

8) a) What are the features of programming controllers? Explain. (8)

b) What are the different types of times? Explain any one of them. (7)

OR

9) a) Explain basic structure of (7)

i) PLC

ii) Ladder diagrams

iii) Counter

b) Explain pick and place robot in detail. (8)

(DME 416 C)




Paper - VI : Optimization Techniques




1) Write a brief note on :

a) Interpolation methods.

b) Define Hessian matrix of a function.

c) State limitations of classical methods insolving one-dimensional minimization problem.

d) Define a saddle point and indicate its significance.

e) Geometric programming.

Unit - I

2) a) State the linear programming problem in stand form and explain.

b) List the engineering application of optimization.

OR

3) Write detailed notes on classification of optimization problems.

Unit – II

4) Explain Random search method with an example.

OR

5) a) Explain any gradient search method using a flow chart.

b) Find the extreme points of the function.

f(x) = x13 + x2

3 + 2x1

2 + 4x2

2 + 6

Unit – III

6) Find the solution for the following problem using geometric programming method

Minimize Z = x1 x2 x3-2

+ 2 x1-1

x2-1

x3 + 5x2 + 3x1 x-2

x1, x2, x3 > 0

OR

7) Explain with an example stochastic programming. Give some application areas of stochastic

programming.

Unit – IV

8) a) Explain method of optimization used in design of simple linkage mechanism.

b) Derive the necessary conditions of optimality and find the solution for following problem.

Min f(x) = 5x1 x2

Subjected to 25 –x12 –x2

2 > 0.

OR

9) A closed cylindrical storage tank is required to hold a minimum of 3000 m3 of oil. Cost of material

is Rs. 50/- per square meter. Frame a constrained geometric programming problem for minimum

cost and solve.

(DME 416 D)




Paper - VI : Refrigeration & Air Conditioning


Answer question No. 1 is compulsory (15)


1) a) What do you understand by Dry Ice Refrigeration?

b) Distinguish Industrial Refrigeration from comfort Airconditioning.

c) Advantages over Reciprocating and centrifugal compressors.

d) What are the advantages of vortex-tube over other Refrigeration system?

e) Explain the following terms.

i) Specific volume of humid air.

ii) Density of humid air.

iii) Enthalpy of humid air.

f) Define the term bypass factor?

g) Explain the importance of “Throw” and “Drop” in locating the grill?

Unit - I

2) a) List out the advantages and disadvantages of liquid gas refrigeration and mention few

specific fields of applications?

b) Why Necessity of cooling the Aeroplane?

OR

3) a) Explain the working of Bell-Coleman–Air-Refrigeration?

b) A Bell–Coleman refrigeration cycle works between l bar and 5 bar. The adiabatic efficiency

of compression is 85% and expansion is 90%. Find out the C.O.P. of the system and its

tonnage when the air flow rate is 1 kg/sec. The ambient temperature is 27ºC and

Refrigeration temperature is 0ºC.

Unit - II

4) a) Explain the working principle of Vapour Compression Refrigeration System?

b) A Refrigerating machine using F–12 as working fluid works between the temperatures –18ºC

and 37ºC. The enthalpy of liquid at 37ºC is 78 kJ/kg. The enthalpy of F–12 entering and

leaving the compressor are 200 kJ/kg and 238 kJ/kg respectively. The rate of circulation of

refrigerant is 2 kg/min and efficiency of compressor is 0.85 determine.

i) Capacity of the plant in tons of Refrigeration.

ii) Power required to run the plant

iii) C.O.P. of the plant.

OR

5) a) Explain the working principle of cascade system?

b) Explain the types of Evaporators and Expansion devices and working principles with

suitable sketch?

Unit - III

6) a) Draw a neat diagram of Lithium – Bromide water absorption system and explain it‟s

working principle?

b) In a absorption Refrigeration System, the heating in generator is carried out by using steam

at 3 bar and 85% dry. The refrigeration temperature is -10ºC, The condensation of the

refrigerant is carried out at 30ºC using cooling water. Determine.

i) The maximum possible C.O.P. of the system?

ii) If the steam leaves the generator as saturated water at same pressure, determine the

quantity of steam required to run a plant of 20 tonnes capacity. Assume relative C.O.P.

= 0.4.

OR

7) a) Draw a neat diagram of the steam jet refrigeration system and it‟s working principle?

b) A steam jet refrigeration plant is designed to supply cooled water at 10ºC in a small industry.

The temperature of make-up water is 25ºC. The steam from the boiler in the same industry

at 8.5 bar and 190ºC is supplied to the refrigerant plant. The dryness fraction of vapour

leaving the flash chamber and entering the ejector is 0.95. A pressure of 60 cm of Hg is

maintained in the condenser when barometer reads 760 cm of Hg. Taking n = 93%, e =

65% and c = 75% determine the following.

i) Mass of steam required per ton of refrigeration per hour.

ii) C.O.P. of the system?

Unit - IV

8) a) Explain briefly Comfort and Comfort chart, effective temperature?

b) Explain ventilation systems?

OR

9) a) Explain briefly Air - Conditioning systems?

b) Explain with a neat sketches of centrifugal & axial fans?

(DME 421)




Paper – I : Mechanical Measurements


Answer question No. 1 is compulsory (15)


1) a) Draw a neat sketch of hydraulic load cell.

b) Explain the principle of LVDT.

c) Calibration.

d) Optical encoder.

e) Define gauge factor.

f) Curve fitting.

g) Dynamic measurements.

Unit - I

2) a) What are the different types characteristics of zero, first and second order systems? Explain

them with neat diagram.

b) Discuss elaborately about different types errors.

OR

3) a) Explain the statistical analysis of measured data with an example.

b) Explain in detail about the stability analysis of the system.

Unit – II

4) a) Sketch and explain the Ionization transduces.

b) Discuss the method of fixing and bridge circuits for measuring strain.

OR

5) a) Discuss in detail the working principle of strain measurement using photoelectric methods

with neat sketches.

b) Sketch and explain different Bonded type of strain gauges.

Unit – III

6) a) State the working principle of a Bourdan tube.

b) Sketch and explain the working principle of Bimetalic thermometers.

OR

7) a) List out few pressure measurement equipment and their importance.

b) What do you mean by “dynamic calibration” in flow measurement? Give the steps which

are necessary in performing a calibration.

Unit – IV

8) a) Explain any one of Elastic force meter.

b) Discuss the working principle of a mechanical Dynamometer Rope and Brake.

OR

9) a) Write in detail about importance of microprocessor based instrumentation and their

application.

b) Describe the principle and working of Vibrometers and Accelerometers.

(DME 422)




Paper - II : Computer Aided Design




1) Write a short notes on the following :

a) Design process.

b) CRT.

c) Parametric and Non parametric representation.

d) Secondary storage devices.

e) Viewing operation.

f) Constructive solid geometry.

g) Geometry and Topology.

UNIT - I

2) a) Explain the applications computers for design.

b) Discuss about the graphics terminals used in CAD.

OR

3) a) Define CAD? Give its applications and benefits?

b) Discuss about the following.

i) DVST

ii) Input Devices.

UNIT – II

4) Draw the flow chart and write the Bresenham‟s algorithm. Generate a line with points (4, 4) (8, 4)

get the slope.

OR

5) a) Explain about the different types of Wire frame modeling entities.

b) Explain about the representation of different curves.

UNIT – III

6) a) What are the different forms of representation of surface modeling? Explain.

b) Define surface modeling? Give it‟s applications.

OR

7) Briefly explain about the following :

a) B-rep (Boundary representation)

b) CSG (constructive solid geometry)

c) Sweep representation.

UNIT – IV

8) a) Explain the principles of Transformation.

b) Distinguish between 2-D and 3-D Transformations.

OR

9) Distinguish between viewing, windowing and clipping operations.

(DME 423)




Paper - III : Energy Resources Utilization




1) a) Write the factors affecting run off.

b) What are the classifications of Hydroelectric power plant?

c) What are high pressure boilers?

d) Explain the concept of Radiation shield.

e) Define collector efficiency.

f) What is a solar cell?

Unit - I

2) a) Describe the essential elements of hydroelectric power plant.

b) Explain with a simple sketch working of a pumped storage plant with its advantages and

disadvantages.

OR

3) a) What are the different fuels used for gas turbine power plant, what are the most suitable

fuels for gas turbine power plant?

b) Discuss the advantages and disadvantages of a gas turbine power plant.

Unit – II

4) a) Draw a block diagram to represent the various steps involved in coal handling.

b) Explain the construction and working of ESP.

OR

5) a) Explain with the help of neat sketch the LA Mont Boiler.

b) Describe the types of cooling towers used in steam power plant.

Unit – III

6) a) Explain with neat sketch working of Boiling Water Reactor BWR?

b) What do you understand by the term ozone layer depletion and what are the methods to

prevent ozone layer depletion.

OR

7) a) What is a moderator in nuclear reactor, explain the desirable properties of a good moderator.

b) Explain the method of disposal of low level solid nuclear waste.

Unit – IV

8) a) With a neat sketch explain the working of a solar pond?

b) Explain with neat sketches working of wind will.

OR

9) a) Stating advantages & disadvantages describe hydrogen oxygen fuel cell.

b) What are the advantages and disadvantages of geothermal energy over other energy forms?

(DME 424 C)




Paper - IV : Robotics


Answer question No. 1 compulsory (1 × 15 = 15)


1) Write a short note on the following :

a) Fixed automation.

b) Grippers.

c) Resolvers.

d) Force and torque sensors.

e) Steps in Trajectory planning.

Unit - I

2) a) Define the following terms :

i) Robotics

ii) Robot

iii) Industrial robot

iv) Automation

b) Explain common types of arms of robot.

OR

3) a) What are the specifications of robots?

b) What is Automation? Explain types of Automations with an examples.

Unit - II

4) a) Explain the degrees of freedom of a manipulator.

b) Explain with the help of a line diagram of a robot connected to a system.

OR

5) What are the considerations in the selection & design of remote centered devices? Explain.

Unit - III

6) Explain the following in brief :

a) Position sensors.

b) Velocity sensors.

OR

7) Define Actuator. Explain briefly types of actuators used in Robots.

Unit - IV

8) Derive the forward kinematics equation using the D-H convention for the three link planar

manipulator shown in figure.

OR

9) What do you mean by Jacobean? Derive the Jacobean matrix for a planar 2-link revolute jointed

manipulator.

(DME 424 D)




Paper - IV : Computational Fluid Dynamics




1) a) Explain how CFD use as a design tool.

b) What are the modern developments of grid generation?

c) Explain about the ADI.

d) Write any two applications of CFD.

e) Write Navier-stokes equation.

f) What is discretization?

g) Define mesh points and grid points.

Unit - I

2) a) Discuss in detail about, momentum and energy equations in 3 Dimensions.

b) Explain Naviour stokes equation in differential form.

OR

3) a) Enumerate the applications of CFD in heat transfer.

b) Write about single generic Integral form equations for continuity, momentum and energy

equations.

Unit – II

4) Explain the advantages and disadvantages of explicit and implicit approaches.

OR

5) Explain the finite volume discretisation and cell centre scheme.

Unit – III

6) a) Explain the governing equations suitable for CFD.

b) Explain any one concept of co-ordinate transformation in CFD.

OR

7) Explain the boundary fitted co-ordinate systems of adaptive grid generation.

Unit – IV

8) a) Explain in detail LAX-WEN droff Technique and their significance.

b) Explain about ADI Technique.

OR

9) a) Explain Mac cormark Technique.

b) Explain in detail about different aspects of numerical dissipation and dispersion and mention

their applications.

Paper - I : Industrial Engineering & Management …5) a) Explain the building blocks of a Thermal...

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