ssc junior engineer(mechanical engineering) exam syllabus 2014, ssc j.e (mechanical engineering )syllabus 2014

Mechanical Engineering Syllabus for SSC junior engineer exam 2014

                    (For both Objective and Conventional Type Papers)
the junior engineer exam is conducted by staff selection commission where the electrical/mechanical/civil engineering degree/diploma candidates can participate.it consists of two papers one objective and other conventional paper.
the objective paper simply consist of reasoning(50 questions) and technical aptitude questions of respective branches.the mechanical engineering candidates can go through the syllabus given below.

Theory of Machines and Machine Design 
Concept of simple machine, Four bar linkage and link motion, Flywheels and fluctuation of
energy, Power transmission by belts – V-belts and Flat belts, Clutches – Plate and Conical
clutch, Gears – Type of gears, gear profile and gear ratio calculation, Governors – Principles
and classification, Riveted joint, Cams, Bearings, Friction in collars and pivots.

Engineering Mechanics and Strength of Materials
Equilibrium of Forces, Law of motion, Friction, Concepts of stress and strain, Elastic limit and
elastic constants, Bending moments and shear force diagram, Stress in composite bars,
Torsion of circular shafts, Buckling of columns – Euler’s and Rankin’s theories, Thin walled
pressure vessels.

Thermal Engineering 
Properties of Pure Substances : p-v & P-T diagrams of pure substance like H2O,
Introduction of steam table with respect to steam generation process; definition of saturation,
wet & superheated status. Definition of dryness fraction of steam, degree of superheat of
steam. h-s chart of steam (Mollier’s Chart).

1st Law of Thermodynamics : Definition of stored energy & internal energy, 1st Law of
Thermodynamics for cyclic process, Non Flow Energy Equation, Flow Energy & Definition of
Enthalpy, Conditions for Steady State Steady Flow; Steady State Steady Flow Energy
Equation.

2nd Law of Thermodynamics : Definition of Sink, Source Reservoir of Heat, Heat Engine,
Heat Pump & Refrigerator; Thermal Efficiency of Heat Engines & co-efficient of performance
of Refrigerators, Kelvin – Planck & Clausius Statements of 2nd Law of Thermodynamics,
Absolute or Thermodynamic Scale of temperature, Clausius Integral, Entropy, Entropy
change calculation for ideal gas processes. Carnot Cycle & Carnot Efficiency, PMM-2;
definition & its impossibility.

Air standard Cycles for IC engines : Otto cycle; plot on P-V, T-S Planes; Thermal
Efficiency, Diesel Cycle; Plot on P-V, T-S planes; Thermal efficiency.
IC Engine Performance, IC Engine Combustion, IC Engine Cooling & Lubrication.
Rankine cycle of steam : Simple Rankine cycle plot on P-V, T-S, h-s planes, Rankine cycle
efficiency with & without pump work.
Boilers; Classification; Specification; Fittings & Accessories : Fire Tube & Water Tube
Boilers.
Air Compressors & their cycles; Refrigeration cycles; Principle of a Refrigeration
Plant; Nozzles & Steam Turbines

Fluid Mechanics & Machinery
Properties & Classification of Fluids : ideal & real fluids, Newton’s law of viscosity,
Newtonian and Non-Newtonian fluids, compressible and incompressible fluids.
Fluid Statics : Pressure at a point.
Measurement of Fluid Pressure : Manometers, U-tube, Inclined tube.
Fluid Kinematics : Stream line, laminar & turbulent flow, external & internal flow,
continuity equation.
Dynamics of ideal fluids : Bernoulli’s equation, Total head; Velocity head; Pressure head;
Application of Bernoulli’s equitation.Measurement of Flow rate Basic Principles : Venturimeter, Pilot tube, Orifice meter.

Hydraulic Turbines: Classifications, Principles.

Centrifugal Pumps : Classifications, Principles, Performance.

Production Engineering
Classification of Steels : mild steal & alloy steel, Heat treatment of steel, Welding – Arc
Welding, Gas Welding, Resistance Welding, Special Welding Techniques i.e. TIG, MIG, etc.
(Brazing & Soldering), Welding Defects & Testing; NDT, Foundry & Casting – methods,
defects, different casting processes, Forging, Extrusion, etc, Metal cutting principles, cutting
tools, Basic Principles of machining with (i) Lathe (ii) Milling (iii) Drilling (iv) Shaping (v)
Grinding, Machines, tools & manufacturing processes.

syllabus for b.tech 8th semester UPTU/MTU/GBTU

EME-064 : PRODUCTION & OPERATIONS MANAGEMENT
Unit –I (6 sessions)
Managing Operations
Operations Management – Function, Evolution, Definition, Systems view of P&OM;
Operations Strategies for Competitive Advantage;
Unit –II ( 9 sessions)
Planning (Designing) the conversion System
Designing Products, Services and Processes; Operations Capacity; Locating Production
and Service facilities; Layout Planning.
Unit-III (7 sessions)
Organizing the conversion System
Job design, Production and Operations standards, and work measurement; Project
Management.
Unit-IV (8 sessions)
Scheduling Production and Service System
Scheduling systems, Aggregate Planning for Production and service system; Operations
Scheduling.
Unit-V (10 sessions)
Material Requirements Planning
Planning for needs, applying MRP, Detailed capacity planning, MRP II.
Managing for World class Competition
World class Manufacturing practices; Managing for Quality; Conversion Process in
change.


EME-052 : MAINTENANCE ENGINEERING & MANAGEMENT
Unit-I
Introduction, operating life cycle, reliability, Failure data analysis, failure rate curve,
hazard models, elements in series, parallel, mix, logic diagrams, improving reliability,
redundancy-element, unit, standby, maintainability, availability, reliability and
maintainability trade off. 8
Unit-II
Maintenance Strategies: Break down maintenance, planned maintenance, strategies,
preventive maintenance, design out maintenance, planned lubrication, total productive
maintenance, zero break down, preventive inspection of equipment used in emergency. 8
Unit-III
Replacement planning maintain or replace decision, replacement of items that
deteriorate identical equipment, replacement of items that fail without deterioration
individual, group replacement, replacement in anticipation of failure. 8
Unit-IV
Break down maintenance planning, assignment model, waiting time models expected
waiting time, minimum cost service rate, PERT. 8
Unit-V
Maintenance Management, production maintenance system, objectives and functions,
forms, policy, planning, organization, economics of maintenance, manpower planning,
materials planning, spare parts planning and control, evaluation of maintenance
management.

EME-021 : NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION
UNIT-1
Energy resources and their utilization :
Indian and global energy sources, Energy exploited, Energy planning, Energy
parameters (energy intensity, energy-GDP elasticity), Introduction to various sources of
energy, Solar thermal, Photovoltaic, Water power, Wind energy, Biomass, Ocean
thermal, Tidal and wave energy, Geothermal energy, Hydrogen energy systems, Fuel
cells, Decentralized and dispersed generation. 3
Solar radiations:
Extra terrestrial radiation, Spectral distribution, Solar constant, Solar radiations on earth,
Measurement of solar radiations, Solar radiation geometry, Flux on a plane surface,
Latitude, Declination angle, Surface azimuth angle, Hour angle, Zenith angle, Solar
altitude angle expression for angle between incident beam and the normal to a plane
surface (no derivation), Local apparent time, Apparent motion of sun, Day length, Solar
radiation data for India. 4
UNIT-2
Solar energy:
Solar thermal power and it's conversion, Solar collectors, Flat plate, Performance
analysis of flat plate collector, Solar concentrating collectors, Types of concentrating
collectors, Thermodynamic limits to concentration, Cylindrical collectors, Thermal
analysis of solar collectors, Tracking CPC and solar swing . 2
Solar thermal energy storage, Different systems, Solar pond. 2
Applications, Water heating, Space heating & cooling, Solar distillation, solar pumping,
solar cooking, Greenhouses, Solar power plants. 2
Solar photovoltaic system:
Photovoltaic effect, Efficiency of solar cells, Semiconductor materials for solar cells,
Solar photovoltaic system, Standards of solar photovoltaic system, Applications of PV
system, PV hybrid system. 2
UNIT-3
Biogas:
Photosynthesis, Bio gas production Aerobic and anaerobic bio-conversion process, Raw
materials, Properties of bio gas, Producer gas, Transportation of bio gas, bio gas plant
technology & status, Community biogas plants, Problems involved in bio gas production,
Bio gas applications, Biomass conversion techniques, Biomass gasification, Energy
recovery from urban waste, Power generation from liquid waste, Biomass cogeneration,
Energy plantation, Fuel properties, Biomass resource development in India. 5
Wind energy:
Properties of wind, Availability of wind energy in India, wind velocity, Wind machine
fundamentals, Types of wind machines and their characteristics, Horizontal and Vertical
axis wind mills, Elementary design principles, Coefficient of performance of a wind mill
rotor, Aerodynamic considerations in wind mill design, Selection of a wind mill, Wind
energy farms, Economic issues, Recent development. 3
UNIT-4
Electrochemical effects and fuel cells:
Principle of operation of an acidic fuel cell, Reusable cells, Ideal fuel cells, Other types of
fuel cells, Comparison between acidic and alkaline hydrogen-oxygen fuel cells,
50
Efficiency and EMF of fuel cells, Operating characteristics of fuel cells, Advantages of
fuel cell power plants, Future potential of fuel cells . 3
Tidal power:
Tides and waves as sources of energy, Fundamentals of tidal power, Use of tidal energy
Limitations of tidal energy conversion systems. 2
Hydrogen Energy:
Properties of hydrogen in respect of it's use as source of renewable energy, Sources of
hydrogen, Production of hydrogen, Storage and transportation, Problems with hydrogen
as fuel, Development of hydrogen cartridge, Economics of hydrogen fuel and its use.. 3
UNIT-5
Thermoelectric systems:
Kelvin relations, power generation, Properties of thermoelectric materials, Fusion
Plasma generators.
Geothermal energy:
Structure of earth’s interior, Geothermal sites, earthquakes & volcanoes, Geothermal
resources, Hot springs, Steam ejection, Principal of working, Types of geothermal
station with schematic representation, Site selection for geothermal power plants.
Advanced concepts, Problems associated with geothermal conversion. 2
Ocean energy;
Principle of ocean thermal energy conversion, Wave energy conversion machines,
Power plants based on ocean energy, Problems associated with ocean thermal energy
conversion systems, Thermoelectric OTEC, Developments of OTEC, Economics . 2
Impact of renewable energy generation on environment, Kyoto Protocol, Cost of
electricity production from different energy sources, Energy options for Indian economy.

EME-801 : POWER PLANT ENGINEERING
Unit-I
Introduction
Power and energy, sources of energy, review of thermodynamic cycles related to
power plants, fuels and combustion calculations. 3
Load estimation, load curves, various terms and factors involved in power plant
calculations. Effect of variable load on power plant operation, Selection of power plant
units. 2
Power plant economics and selection
Effect of plant type on costs, rates, fixed elements, energy elements, customer
elements and investor’s profit; depreciation and replacement, theory of rates. Economics
of plant selection, other considerations in plant selection. 3
Unit-II
Steam power plant
General layout of steam power plant, Power plant boilers including critical and
super critical boilers. Fluidized bed boilers, boilers mountings and accessories, Different
systems such as coal handling system, pulverizers and coal burners, combustion
system, draft, ash handling system, Dust collection system, Feed water treatment and
condenser and cooling towers and cooling ponds, Turbine auxiliary systems such as
governing, feed heating, reheating , flange heating and gland leakage. Operation and
maintenance of steam power plant, heat balance and efficiency, Site selection of a
steam power plant. 8
Unit-III
Diesel power plant
General layout, Components of Diesel power plant, Performance of diesel power
plant, fuel system, lubrication system, air intake and admission system, supercharging
system, exhaust system, diesel plant operation and efficiency, heat balance, Site
selection of diesel power plant, Comparative study of diesel power plant with steam
power plant. 2
Gas turbine power plant
Layout of gas turbine power plant, Elements of gas turbine power plants, Gas
turbine fuels, cogeneration, auxiliary systems such as fuel, controls and lubrication,
operation and maintenance, Combined cycle power plants, Site selection of gas turbine
power plant 6
Unit-IV
Nuclear power plant
Principles of nuclear energy, Lay out of nuclear power plant, Basic components of
nuclear reactions, nuclear power station, Nuclear waste disposal, Site selection of
nuclear power plants. 3
Hydro electric station
Hydrology, Principles of working, applications, site selection, classification and
arrangements, hydro-electric plants, run off size of plant and choice of units, operation
and maintenance, hydro systems, interconnected systems. 4
Non Conventional Power Plants
Introduction to non-conventional power plants (Solar, wind, geothermal, tidal)etc. 2
Unit-V
Electrical system
Generators and generator cooling, transformers and their cooling, bus bar, etc. 2
Instrumentation
Purpose, classification, selection and application, recorders and their use, listing
of various control rooms. 3
Pollution
Pollution due to power generation

syllabus for b.tech final year, open elective -1 operation research ,UPTU/GBTU

EOE-073: OPERATIONS   RESEARACH

UNIT-I

Introduction:

Difinition and scope of operations research (OR), OR model, solving the OR model, art of

modelling, phases of OR study.

Linear Programming:

Two variable Linear Programming model and Graphical method of solution, Simplex method,

Dual Simplex method, special cases of Linear Programming, duality, sensitivity analysis.

UNIT-II

Transportation Problems:

Types of transportation problems, mathematical models , transportation algorithms, 

Assignment:

Allocation and assignment problems and models, processing of job through machines.

UNIT-III

Network Teachniques:

Shortest path model, minimum spanning Tree Problem, Max-Flow problem and Min-cost

problem.

Project Management:

Phases of project management, guidelines for network construction, CPM and PERT.

UNIT-IV

Theory of Games :

Rectangular games, Minimax theorem, graphical solution of 2 x n or m x 2 games, game with

mixed strategies, reduction to linear programming model.

Quality Systems:

Elements of Queuing model, generalized poisson queing model, single server models. (12)

UNIT-V

Inventory Control:

Models of inventory, operation of inventory system, quantity discount.

Replacement:

Replacement models: Equipments that deteriorate with time, equipments that fail with time.

GATE syllabus 2013 for mechanical engineering

        GATE 2013 - Syllabus for Mechanical Engineering (ME)

Linear Algebra:

Matrix algebra, Systems of linear equations, Eigen values and eigen vectors.

Calculus:

Functions of single variable, Limit, continuity and differentiability, Mean value theorems,
Evaluation of definite and improper integrals, Partial derivatives, Total derivative, Maxima and
minima, Gradient, Divergence and Curl, Vector identities, Directional derivatives, Line, Surface
and Volume integrals, Stokes, Gauss and Green's theorems.

Differential equations:


First order equations (linear and nonlinear), Higher order linear differential equations with
constant coefficients, Cauchy's and Euler's equations, Initial and boundary value problems,
Laplace transforms, Solutions of one dimensional heat and wave equations and Laplace
equation.

Complex variables:
Analytic functions, Cauchy's integral theorem, Taylor and Laurent series.

Probability and Statistics:


Definitions of probability and sampling theorems, Conditional probability, Mean, median, mode
and standard deviation, Random variables, Poisson, Normal and Binomial distributions.

Numerical Methods:


Numerical solutions of linear and non-linear algebraic equations Integration by trapezoidal and
Simpson's rule, single and multi-step methods for differential equations.
Applied Mechanics and Design

Engineering Mechanics:

Free body diagrams and equilibrium; trusses and frames; virtual work; kinematics and dynamics
of particles and of rigid bodies in plane motion, including impulse and momentum (linear and
angular) and energy formulations; impact.
Strength of Materials:
Stress and strain, stress-strain relationship and elastic constants, Mohr's circle for plane stress
and plane strain, thin cylinders; shear force and bending moment diagrams; bending and shear
stresses; deflection of beams; torsion of circular shafts; Euler's theory of columns; strain energy
methods; thermal stresses.

Theory of Machines:

Displacement, velocity and acceleration analysis of plane mechanisms; dynamic analysis of
slider-crank mechanism; gear trains; flywheels.

Vibrations:

Free and forced vibration of single degree of freedom systems; effect of damping; vibration
isolation; resonance, critical speeds of shafts.
Design:

Design for static and dynamic loading; failure theories; fatigue strength and the S-N diagram; pri
nciples
of the design of machine elements such as bolted, riveted and welded joints, shafts, spur gears,
rolling and sliding contact bearings, brakes and clutches.

Fluid Mechanics and Thermal Sciences

Fluid Mechanics:

Fluid properties; fluid statics, manometry, buoyancy; control-volume analysis of mass,
momentum and energy; fluid acceleration; differential equations of continuity and momentum;
Bernoulli's equation; viscous flow of incompressible fluids; boundary layer; elementary turbulent
flow; flow through pipes, head losses in pipes, bends etc.

Heat-Transfer:
Modes of heat transfer; one dimensional heat conduction, resistance concept, electrical
analogy, unsteady heat conduction, fins; dimensionless parameters in free and forced
convective heat transfer, various correlations for heat transfer in flow over flat plates and
through pipes; thermal boundary layer; effect of turbulence; radiative heat transfer, black and
grey surfaces, shape factors, network analysis; heat exchanger performance, LMTD and NTU
methods.

Thermodynamics:

Zeroth, First and Second laws of thermodynamics; thermodynamic system and processes;
Carnot cycle. irreversibility and availability; behaviour of ideal and real gases, properties of pure
substances, calculation of work and heat in ideal processes; analysis of thermodynamic cycles
related to energy conversion.

Applications:


Power Engineering: Steam Tables, Rankine, Brayton cycles with regeneration and reheat. I.C.
Engines
: air-standard Otto, Diesel cycles.
Refrigeration and air-conditioning
: Vapour refrigeration cycle, heat pumps, gas refrigeration, Reverse Brayton cycle; moist air:
psychrometric chart, basic psychrometric processes.
Turbomachinery:
Pelton-wheel, Francis and Kaplan turbines - impulse and reaction principles, velocity diagrams.

 Manufacturing and Industrial Engineering


Engineering Materials
Structure and properties of engineering materials, heat treatment, stress-strain diagrams for
engineering materials.

Metal Casting:

Design of patterns, moulds and cores; solidification and cooling; riser and gating design, design
considerations.


Forming:
Plastic deformation and yield criteria; fundamentals of hot and cold working processes; load
estimation for bulk (forging, rolling, extrusion, drawing) and sheet (shearing, deep drawing,
bending) metal forming processes; principles of powder metallurgy.


Joining:

Physics of welding, brazing and soldering; adhesive bonding; design considerations in welding.

Machining and Machine Tool Operations:

Mechanics of machining, single and multi-point cutting tools, tool geometry and materials, tool
life and wear; economics of machining; principles of non-traditional machining processes;
principles of work holding, principles of design of jigs and fixtures
Metrology and Inspection:


Limits, fits and tolerances; linear and angular measurements; comparators; gauge design;
interferometry; form and finish measurement; alignment and testing methods; tolerance analysis
in manufacturing and assembly.
Computer Integrated Manufacturing:
Basic concepts of CAD/CAM and their integration tools.

Production Planning and Control:


Forecasting models, aggregate production planning, scheduling, materials requirement
planning.

Inventory Control:

Deterministic and probabilistic models; safety stock inventory control systems.


Operations Research:

Linear programming, simplex and duplex method, transportation, assignment, network flow
models, simple queuing models, PERT and CPM.

program for spur and helical gear design

                                             
                                  #program for spur gear design#

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
float G,P,L,R,t,Y,Z,A,B,W,N,T,S,D,M,V,r,F;
clrscr();
printf("enter the value of endurence strength for gear=");
scanf("%f",&G);
printf("enter the value of endurence strength for pinion=");
scanf("%f",&P);
printf("enter the value of number of teeth on gear=");
scanf("%f",&L);
printf("enter the value of number of teeth on pinion=");
scanf("%f",&R);
printf("enter the value of form factor for gear=");
scanf("%f",&Y);
printf("enter the value of form factor for pinion=");
scanf("%f",&Z);
A=G*Y;
B=P*Z;



if(A>B)
{

 printf("the pinion is weaker ,the design should be done for pinion");

}
else
{
Printf(“the gear is weaker ,the design should be done for gear”)
}
               printf("enter the value of power=");
scanf("%f",&W);
printf("enter the value of rotational speed= ");
scanf("%f",&N);
t=(W*60)/(6.18*N);
printf("torque=%f\n",t);

printf("enter the value of induced stress =");
scanf("%f",S);
M=pow((1.037/S),0.333);
printf("module=%f\n",M);
D=R*M;
printf("diameter of pinion=%f\n",D);
printf("enter the value of radius=");
scanf("%f",&r);
V=r*(6.28*N)/60;
printf("velocity =%f\n",V);
F=M*3.374*3.14;
printf("face width=%f\n",F);

getch();
}


************************output**********************
enter the value of endurence strength for gear=60000000
enter the value of endurence strength for pinion=40000000
enter the value of number of teeth on gear=54
enter the value of number of teeth on pinion=26
enter the value of form factor for gear=.12
enter the value of form factor for pinion=.094
the pinion is weaker the design should be done for pinion
enter the value of power=14000
enter the value of rotational speed= 340
torque=399.771545
enter the value of induced stress =40000000
module=.002976
diameter of pinion=.07740
enter the value of radius=34
velocity =12.09946
face width=.03072




**********************************************************************************
                                      
                                               #program for helical gear design#

               

#include<stdio.h>
#include<math.h>
#include<conio.h>
#define y=0.107
void main()
{
float so,ses,m,b,ps,pa,ha,gs,tg,tp,vtp,vtg,s,k,v,f;
clrscr();

    printf("Enter the value of endurace strength=");
    scanf("%f",&so);
    printf("Enter the value of ses=");
    scanf("%f",&ses);
    printf("Enter the value of module=");
    scanf("%f",&m);
    printf("Enter the value of facewidth=");
    scanf("%f",&b);

    printf("Enter the value of speed of pinion=");
    scanf("%f",&ps);
    printf("Enter the value of speed of gear=");
    scanf("%f",&gs);
    printf("Enter the value of teeth of pinion=");
    scanf("%f",&tp);
    printf("Enter the value of pressure angle=");
    scanf("%f",&pa);
    printf("Enter the value of helix angle=");
    scanf("%f",&ha);

tg=(tp*ps)/gs;
    printf("teeth of gear=%f\n",tg);
k=(cos(ha))*(cos(ha))*(cos(ha))
vtp=tp/k;
    printf("virtual teeth for pinion=%f\n",vtp);

vtg=tg/k;
    printf("virtual teeth for gear=%f\n",vtg);

v=(2*3.14*ps*m*vtp)/(120);
    printf("velocity=%f\n",v);

s=so*((5.6)/((5.6)+(sqrt(v))));
    printf("enduced bending stress=%f\n",s);

f=(s*b*y*(3.14)*m*(cos(ha));
    printf("force=%f\n",f);

getch();
}


**********************output**************************

Enter the value of endurace strength=70000000
Enter the value of ses=630000000
Enter the value of module=0.003
Enter the value of facewidth=0.03
Enter the value of speed of pinion=600
Enter the value of speed of gear=300
Enter the value of teeth of pinion=25
Enter the value of pressure angle=0.34888
Enter the value of helix angle=0.40122
teeth of gear=50
virtual teeth for pinion=32.05248
virtual teeth for gear=64.10497
velocity=3.01
enduced bending stress=53442871.9
force=1487.55080

previous year question papers of advance welding technology for b.tech (UPTU/GBTU/MTU)

                                                                   B.Tech
                                            (SEM.6th )Examination ,2008-09 
                   ADVANCE WELDING TECHNOLOGY


NOTE:-  1.Attempt all five questions.
             2.all questions carry equal marks\
              3.be precise in your answer
Question no.-1 write short note on any four of the following:
(a)explosive welding
(b)modes of metal transfer
(c)hardfacing
(d)ultrasonic welding
(e)TIG vs MIG
(f)soldering and brazing


Question no.-2-write any two of the following:
(a)what is the schaeffler diagram? how it can be used for the selection of electrodes?
(b)explain the principle of electron beam welding with a neat sketch.what is the mechanism of high carbon peetration ?what do you understand by work accelerated and self accelerated electron gun?
(c)explain the laser beam welding with the help of diagram.what is the principle of laser generation ?


Question no.-3-answer any two of  the following:


(a)what do you mean by underwater welding ?describe in brief.how may arc stability could be improved in it?   what are the advantages and limitations of wet under water welding ?
(b)what is the principle behind ultrasonic welding ?describe ultrasonic welding with a neat sketch.
(c)what is metallising process ?how the surface of work must be prepared for this process also describe the nature of bond between sprayed metal and work.


Question no.-4-  -answer any two of the following:


(a)briefly describe the neat sketches the procedure commenly followed for the welding of pipelines on site .what is stove pipe technique or welding pipelines ?
(b)what are the similarities and differences between casting of metals and fusion welds?
(c)explain in brief the various defects and distortions in welding.


Question no.5-answer any two of the following:


(a)define weldability of materials and mention the factors on which weldability depends.
(b)what is weld decay ?how can weld decay be avoided?
(c)what are the characterstics of HAZ  ? also explain the factors affecting HAZ.



                                                 
                                               B.Tech
                                            (SEM.6th )Examination ,2007-08 
                   ADVANCE WELDING TECHNOLOGY



NOTE:-  1.Attempt all five questions.
             2.all questions carry equal marks\
              3.be precise in your answer
Question no.-1 write short note on any four of the following:
(a)electron beam welding
(b)arc blow in welding
(c)spray welding
(d)importance of schaeffler diagram
(e) electroslag welding
(f)under water welding
(g)life prediction of welded structures


Question no.2.answer any two of the following:


(a)what do you understand by polarity in welding .compare DC welding with AC welding .which polarity will you select while welding (1)aluminium (2)copper?what are the forces acting which transfer the metal from the metal electrode to the work piece in course of welding ?
(b)what do you understand by friction welding ?where is it suitable?discuss its principle .what are the diffrences amongst the homogeneous ,autogeneous and heterogeneous process?give example of each process.
(c)what do you understand by resistance welding ?what s the spot welding and how it defers from the projection welding ?what is to be done to join different thickness of same metals by spot welding?what must be done to joint same thickness of different metals?


Question no.3-answer any two of the  following:
(a)describe with the sketches ,the mechanism of explosive welding.also briefly write about weld interface and welding parameters .what are the applications of the explosive welding ?
(b)what is meant by hard facing ?how hard facing with electrical arc  is theoretically  considered as simultaneous alloy steel making in electrical arc furnace and heat treatment ?what welding process may be used for hard facing ?enumerate the advantages and applications of the hardfacing.
(c)explain the terms transferred mode and non transferred modes used in plasma arc welding .what is plasma?describe plasma acr weldimg and mention its advantages .

Question no.4-answer any two of the following:


(a)whats is meant by weld quality ?discuss the factors that influence it.
(b)explain why some joints may have to be preheated prior to welding?
(c)list the rules that must be followed to avoid cracking in welded joints.


Question no.5-answer any two of the following:


  (a)define weldability .discuss the weldability if carbon metals and explain why some metals are easier to weld than others .cast iron is generally difficult to weld .why?how does the weldability of steel changes as its carbon content increases ?
(b)describe the reasons that fatigue failures heat generally occurs in HAZ of welds instead of through the weld bead itself.
(c)define theoretical/empirical/semi-empirical approach for temperature distribution in welding.also ,draw temperature contours around the weld of arc during arc welding.


NOTE:- these questions are important for sessional tests as well as university point of view .the questions written in red colour are most important for the 1st sessional test
                                         

program to calculate gear parameters ,gear calculator program

#    program to calculate the gear parameters  #
#include<stdio.h>                                                          
#include<conio.h>                                                          
void main()                                                                
{                                                                          
        float t,d,c,s,a,k,m,w;                                              
        clrscr();                                                          
        printf("enter the value of t=");                                    
        scanf("%f",&t);                                                    
        printf("enter the value of diametral pitch=");                      
        scanf("%f",&s);                                                    
        c=3.14/s;              
                                          
        printf("Cirular Pitch=%f\n",c);                                    
                                                                           
        d=t/s;                                                              
        printf("pitch diameter=%f\n",d);                                  

         a=1/s;                                                              
        printf("addendum=%f\n",a);                                          
                                                                           
       k=1.157/s;                                                        
      printf("deddendum=%f\n",k);                                                                                                  
   
        m=(t+2)/s;                                                          
       printf("outside diameter =%f\n",m);                              
       w=2/s;                                                              
      printf("working depth=%f\n",w);                        
      getch();    
}
……………#Output#……..
enter the value of t=70
enter the value of diametral pitch=3.5
Cirular Pitch=0.897143
pitch diameter=20.000000
addendum=0.285714
deddendum=0.330571
outside diameter =20.571428
working depth=0.571429




guyz plz comment if you like this program.........