Thursday, 27 December 2012

Industrial Engineering S K Mondal’s Notes for gate ies and other public exams



S K Mondal’s

Industrial Engineering
Contents
Chapter 1: Forecasting
Chapter 2: Routing, Scheduling, etc.
Chapter 3: Line Balancing
Chapter 4: Break Even Analysis
Chapter 5: PERT and CPM
Chapter 6: Inventory Control
                 ABC Analysis
                 EOQ Model
Chapter 7: Materials Requirement Planning
                    Job design
                   Job Standards
Chapter 8: Work Study
                     Motion Study and Motion Economy
                       Work Measurement (Time Study)
                                 Predetermined Motion Time System
Chapter 9: Plant Layout
                     Type of Plant Layout
                    Product Layout
                        Functional Layout

                     Process Layout
                           Fixed Position Layout
                              Work Flow Diagram
                                 Flow Process Chart
                          Computerized Techniques for Plant Layout
                                 CORELAP, CRAFT, ALDEP, PLANET, COFAD, CAN-Q
Chapter 10: Quality Analysis and Control
                              Statistical Quality Control
                          Control Chart
                           Control Chart for Variables
                       X– Chat and R – Chart
                         Control Chart for Variables
                              C – Chart and P – Chart
Chapter 11: Process Capability
                             Operation Characteristic Curve (OC Curve)
                            Sampling Plan (Single, Double, Sequential Sampling Plan)
                       Work Sampling
                          Total Quality Management (TQM)
                             ISO
                        Just in Time (JIT)
                                   Operations Research
Chapter 12: Graphical Method
Chapter 13: Simplex Method
Chapter 14: Transportation Model
Chapter 15: Assignment Model
Chapter 16: Queuing Model
Chapter 17: Value Analysis for Cost/Value
Chapter 18: Miscellaneous
                Wages Plan, Depreciation
                Load Chart, Mass Production
                    Gantt Chart
                     Others



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IC Engine GATE, IES & IAS 20 Years Question Answers


IC Engine

GATE, IES & IAS 20 Years Question Answers


Contents
Chapter – 1: Gas Power Cycles
Chapter - 2 : SI and CI Engines
Chapter - 3 : Carburetion and Fuel Injection
Chapter - 4 : Fuels
Chapter - 5 : SuperCharging
Chapter - 6 : Jet Propulsion
Chapter - 7 : IC Engine Performances
Chapter - 8 : Engine Cooling
Chapter - 9 : Emission and Control

Er. S K Mondal
IES Officer (Railway), GATE topper, NTPC ET-2003 batch, 12 years teaching
experienced, Author of Hydro Power Familiarization (NTPC Ltd)

Click For Preview

Tags: GATE, IES IAS 20 Years Question Answers,IC Engine,Gas Power Cycles,SI and CI Engines,Carburetion and Fuel Injection,SuperCharging,Jet Propulsion,IC Engine Performances,Engine Cooling,Emission and Control

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Gate Study material List for Mechanical engineers

Gate Study material List for Mechanical engineers
Click Here to Download

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GATE-Mathematics-Questions-All-Branch-by-S-K-Mondal

GATE-Mathematics-Questions-All-Branch-by-S-K-Mondal
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Fundamentals of machine design and Brief overview of design and manufacturing


A machine element, after design, requires to be manufactured to give it a shape of a product. Therefore, in addition to standard design practices like, selection of proper material, ensuring proper strength and dimension to guard against failure, a designer should have knowledge of basic manufacturing aspects.
In this lesson, we will discuss briefly about some of the basic manufacturing requirements and processes.
First and foremost is assigning proper size to a machine element from
manufacturing view point. As for example, a shaft may be designed to diameter of, say, 40 mm. This means, the nominal diameter of the shaft is 40 mm, but the actual size will be slightly different, because it is impossible to manufacture a shaft of exactly 40 mm diameter, no matter what machine is used. In case the machine element is a mating part with another one, then dimensions of both the parts become important, because they dictate the nature of assembly. The allowable variation in size for the mating parts is called limits and the nature of
assembly due to such variation in size is known as fits.


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Statics and Dynamics

Statics and Dynamics

 Textbook: Instructor's notes
Engineering Mechanics, Volume 1 - Statics, by J. L. Meriam and L. G. Kraige, John Wiley and Sons, 2006.
Engineering Mechanics, Volume 2 - Dynamics, by J. L. Meriam and L. G. Kraige, John Wiley and Sons, 2006.Engineering Mechanics: Statics & Dynamics, 12/E, Russell C. Hibbeler, Prentice Hall, 2010.
Course Outcomes and Linkage to Course Objectives
Upon completion of this course, the student will be able to:
1. Construct free body diagrams.
2. Calculate reaction forces and moments for practical structures in static equilibrium such as
trusses, frames, and simple machines.
3. Construct and solve equations relating the applied forces to the resulting motion of a body
modeled as a particle, including projectiles, vehicles, pulley elements, and vibrations of a
mass-spring-damper system, etc.
4. Solve practical dynamics problems using impulse-momentum and work-energy concepts
including collisions, vehicle motion, and spring-mass systems.

Representative Lecture Topics and Coverage (50 Minute Lecture Periods)
Vector Algebra (pdf) [3 Lectures]
Distributed Properties: Centroids and Moments of Inertia [5 Lectures]
Centroids (pdf)    Sample Problems (pdf)
Moments of Inertia (pdf)  Sample Problems (pdf)
Friction [3 Lectures]
Sample Problems (pdf)
Kinematics of a Particle (pdf) [6 Lectures]
Sample Problems:
    Rectilinear motion (pdf)
    Projectile motion (pdf)
    Curvilinear and relative motion (pdf)
Exams [2 Lectures]
Solutions for video problems at: ftp://ftp.eng.auburn.edu/pub/marghdb
Exam I Sample (pdf)
Exam II Sample (pdf)EXAM I (pdf): problems 1, 2, 3, 4
EXAM II (pdf): problems  2, 3, 4, 5, 6, 7, 8 (html)
FINAL EXAM (pdf) problems 1, 2, 3, 4, 5, 6, 7, 8-14 (html)


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CENTRIFUGAL PUMPS In Detail By P.K.Nagarajan


Download The Lecture Notes: Click Here.
Centrifugal pumps, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. Centrifugal pumps are used to transport liquids/fluids by the conversion of the rotational kinetic energy to the hydro dynamics energy of the liquid flow. The rotational energy typically comes from an engine or electric motor or turbine. In the typical simple case, the fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits.
Common uses include water, sewage, petroleum and petrochemical pumping. The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy.

How it works

Like most pumps, a centrifugal pump converts mechanical energy from a motor to energy of a moving fluid. A portion of the energy goes into kinetic energy of the fluid motion, and some into potential energy, represented by fluid pressure (Hydraulic head) or by lifting the fluid, against gravity, to a higher altitude.


The transfer of energy from the mechanical rotation of the impeller to the motion and pressure of the fluid is usually described in terms of centrifugal force, especially in older sources written before the modern concept of centrifugal force as a fictitious force in a rotating reference frame was well articulated. The concept of centrifugal force is not actually required to describe the action of the centrifugal pump.

The outlet pressure is a reflection of the pressure that applies the centripetal force that curves the path of the water to move circularly inside the pump. On the other hand, the statement that the "outward force generated within the wheel is to be understood as being produced entirely by the medium of centrifugal force" is best understood in terms of centrifugal force as a fictional force in the frame of reference of the rotating impeller; the actual forces on the water are inward, or centripetal, since that's the direction of force need to make the water move in circles. This force is supplied by a pressure gradient that is set up by the rotation, where the pressure at the outside, at the wall of the volute, can be taken as a reactive centrifugal force. This was typical of nineteenth and early twentieth century writings, mixing the concepts of centrifugal force in informal descriptions of effects, such as those in the centrifugal pump.

Differing concepts and explanations of how centrifugal pumps work have long engendered controversy and criticism. For example, the American Expert Commission sent to the Vienna Exposition in 1873 issued a report that included observations that "they are misnamed centrifugal, because they do not operate by centrifugal force at all; they operate by pressure the same as a turbine water wheel; when people understand their method of operating we may expect much improvement." John Richards, editor of the San Francisco-based journal Industry, also downplayed the significance of centrifugal force in his in-depth essay.

"This extraordinary report stands printed in a Government publication, signed by men who were, or are, eminent in mechanics, and we can only deplore the stupidity, as well as presumption of the commission who thus disposed of a subject that had twenty years before been carefully investigated by such men as Sir John Rennie, Professor Cowper, Mr. Whitelaw, Dr. James Black, Professor Rankine, and many others. The most astonishing part is, however, that this report was passed and signed by men who we can hardly suppose would fail to perceive its absurdity."

Energy usage

The energy usage in a pumping installation is determined by the flow required, the height lifted and the length and friction characteristics of the pipeline. The power required to drive a pump (P_i), is defined simply using SI units by:

Single-stage radial-flow centrifugal pump
P_i= \cfrac{\rho\ g\ H\ Q}{\eta}
where:
P_i is the input power required (W)
\rho is the fluid density (kg/m3)
g is the standard acceleration of gravity (9.80665 m/s2)
H is the energy Head added to the flow (m)
Q is the flow rate (m3/s)
\eta is the efficiency of the pump plant as a decimal
The head added by the pump (H) is a sum of the static lift, the head loss due to friction and any losses due to valves or pipe bends all expressed in metres of fluid. Power is more commonly expressed as kilowatts (103 W, kW) or horsepower (kW = hp*0.746). The value for the pump efficiency, \eta_{pump}, may be stated for the pump itself or as a combined efficiency of the pump and motor system.
The energy usage is determined by multiplying the power requirement by the length of time the pump is operating.

Problems of centrifugal pumps
These are some difficulties faced in centrifugal pumps-
Open Type Centrifugal Pump Impeller
Cavitation—the net positive suction head (NPSH) of the system is too low for the selected pump
Wear of the Impeller—can be worsened by suspended solids
Corrosion inside the pump caused by the fluid properties
Overheating due to low flow
Leakage along rotating shaft
Lack of prime—centrifugal pumps must be filled (with the fluid to be pumped) in order to operate
Surge
Download The Lecture Notes: Click Here.
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