LAXMI INSTITUTE OF TECHNOLOGY · 4 AText Book of Electrical Power Dr. S. L. Uppal Khanna Publications 5 Modern Electric Traction H.Partap Dhanpat Rai & Sons 6 Utilization of Electrical

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LAXMI INSTITUTE OF TECHNOLOGY SARIGAM

COURSE FILE

Faculty Name : PATEL PINKAL RAGHUBHAI

Subject Name : UTILIZATION OF ELECTRICAL

ENERGY AND TRANCTION

Subject Code : 2160907

Course Name : B.E (Electrical Engineering)

Semester : 6TH

Session : Dec-April 2019

DEPARTMENT OF ELECTRICAL ENGINEERING

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Institutional Vision To educate the unreached talents to beacon the nation through research and

innovative technology

Institutional Mission ● To impart seamless education to individual scholars for delivering the highest

quality professionalism and cutting edge research for the benefit of society on a

national and global scale.

● To foster and maintain mutually beneficial partnerships with our alumni,

friends, industry, and local, state, and central governments through public

services assistance and collaborative research.

● To be the centre of excellence for creating holistic citizens inculcated with

ethical, moral and social values in diverse culture of Indian environment.

Departmental Vision

To become a trailblazer in providing education and training in the field of

Electrical Engineering to the ambitious graduates to be proficient in their career.

Departmental Mission

To provide education of high global standards with the able guidance of

dedicated professionals and a state of art ambience.

To motivate the electrical engineers to focus on the eco-friendly renewable

sources of energy.

To impart quality education for enhancing opportunities

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DEPARTMENT OF ELECTRICAL ENGINEERING

CLASS TIME-TABLE

SEM: 6th

CLASS ROOM-(C-244) TERM PERIOD: Dec - April 2019 W.E.F:

17/12/2018

DAY↓ TIME→

08:20

to

09:10

09:10

to

10:00

10:10

to

11:00

11:00

to

11:50

12:00

to

12:50

12:50

to

01:35

Monday SUBJECT

FACULTY

EPS-

2(SS) HVE(PRP)

DDMT(SK)1(C 245)

HVE(PRP)2(SGP LAB)

CED(RA)3( IT LAB 1)

UEET(PNP) DDMT(SK)

Tuesday SUBJECT

FACULTY

EPS-

2(SS) PE-2(VP)

PE2(VP)2(C 248)

HVE(PRP)1(SGP LAB)

DDMT(SK)3(C 245)

EPS-2(SS) CED(RA)

Wednesd

ay

SUBJECT

FACULTY

UEET(P

NP) DDMT(SK) PE-2(VP) CED(RA)

PE2(VP)1(C 248)

EPS2(SS)3(IT LAB 2)

CED(RA)2(C 249)

Thursday SUBJECT

FACULTY

UEET(P

NP) DDMT(SK) CED(RA) HVE(PRP)

PE2(VP)3(C 248)

EPS2(SS)2(IT LAB 2)

CED(RA)1(C 249)

Friday SUBJECT

FACULTY

HVE(PRP)3(SGP LAB)

EPS2(SS)1(IT LAB 2)

DDMT(SK)2(C 245)

PE-2(VP) HVE(PRP) DDMT(SK) EPS-2(SS)

Saturday SUBJECT

FACULTY

CED(R

A) HVE(PRP) PE-2(VP) UEET(PNP) DESIGN ENGG. (BPD)

Laxmi Institute of Technology , Sarigam Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University, Ahmadabad

Academic Year : 2018-2019

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SCHEME

SYLLABUS

Unit Topics Teaching

Hours

Module

Weightage

1 ELECTRIC DRIVES:

Advantages of electric drives, Characteristics of different

mechanical loads, Types of motors used in electric drive,

Electric braking, Plugging, Rheostat braking, Regenerative

braking, Methods of power transfer by direct coupling by using

devices like belt drive, gears, pulley drives etc. Examples of

selection of motors for different types of domestic loads

Selection of drive for applications such as general workshop,

textile mill, paper mill, steel mill, printing press, crane, lift etc.

Application of flywheel. Specifications of commonly used

motors e.g. squirrel cage, slip ring induction motors, AC series

motors, FKW motor

10 15

2 ILLUMINATION:

Nature of light, visibility spectrum curve of relative sensitivity

of human eye and wave length of light, Different type of

lamps, construction and working of incandescent and discharge

lamps – their characteristics, fittings required for filament

lamp, mercury vapour lamp, fluorescent lamp, metal halide

lamp, neon lamp General ideas bout street lighting, flood

lighting, monument lighting and decorative lighting, light

characteristics etc.,LED Lighting

4 12

3 ELECTRIC HEATING:

Advantages of electrical heating, Heating methods , Resistance

heating – direct and indirect resistance heating, electric ovens,

their temperature range, properties of resistance heating

elements, domestic water heaters and other heating appliances

and thermostat control circuit, Induction heating; principle of

core type and coreless induction furnace, Electric arc heating,

12 25

Semester Course Title Course Code Theory Paper

L T P

6 Utilization of

electrical energy

and traction

2160907 4 0 0 70

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direct and indirect arc heating, construction, workingand

applications of arc furnace, Dielectric heating, applications in

various industrial fields, Infra-red heating and its applications,

Microwave heating, Simple design problems of resistance

heating element

4 ELECTRIC WELDING:

Advantages of electric welding, Welding methods, Principles

of resistance welding, types – spot, projection seam and butt,

welding and welding equipment used, Principle of arc

production, electric arc welding, characteristics of arc,carbon

arc, metal arc, hydrogen arc welding and their applications,

Power supply required, Advantages of using coatedelectrodes,

comparison between AC and DC arc welding, welding

controlcircuits, welding of aluminium and copper, Introduction

to TIG, MIG welding

8 13

5 ELECTROLYTIC PROCESSES:

Need of electro-deposition, Laws of electrolysis, process of

electrodeposition - clearing, operation, deposition of metals,

polishing, buffing, Equipment and accessories for

electroplating, Factors affecting electrodeposition, Principle of

galvanizing and its applications, Principle of anodising and its

applications, Electroplating on non-conducting materials,

Manufacture of chemicals by electrolytic process and

electrolysis process

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6 ELECTRICAL CIRCUITS USED IN REFRIGERATION,

AIR CONDITIONING AND WATER COOLERS:

Principle of air conditioning, vapour pressure, refrigeration

cycle, ecofriendly refrigerants, Description of Electrical circuit

used in refrigerator, air conditioner and water cooler

4 13

7 ELECTRIC TRACTION:

Electric traction, Advantages of electric traction, Different

systems of electric traction, DC and AC systems, diesel electric

system, types of services – urban, sub-urban, and main lines

and their speedtime curves, Different accessories for track

electrification such as overhead capacitor wire, conductor rail

system, current collector-pantograph, Factors affecting

scheduled speed, Electrical block diagram of an electric

locomotive with description of various equipment and

accessories, Types of motors used for electric traction, Starting

and braking of traction motors, Introduction to EMU and metro

railways

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List of Reference Books

S.No Book Title Author Publication

1 Generation and Utilization of Electrical Energy S.

Sivanagaruju

Pearson

2 Art and Science of Utilization of Electrical Energy H.Partap Dhanpat Rai &

Sons

3 Utilization of Electrical Energy J. B. Gupta Kataria

Publications

4 AText Book of Electrical Power Dr. S. L. Uppal Khanna

Publications

5 Modern Electric Traction H.Partap Dhanpat Rai &

Sons

6 Utilization of Electrical Energy O. S. Taylor Pitman

Publications

7 Generation, Distribution and Utilization if Electrical

Power

C. L.Wadhwa Wiley Eastern

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Department of Electrical Engineering Academic Year : 2018 -2019

ASSIGNMENT – I

Name of the Subject: Utilization of Electrical Energy and Traction

Date: 15.01.2019


S. No Question Remarks

1. Explain electric drives and it's classification in detail.

2. Explain factor affecting for selection of drive.

3. Explain four quadrant operation of drive with suitable diagram.

4. State the type of electric bracking. Explain any one in detail.

5. Derive the expression for temperature rise of an electric motor.

6. What do you understand by load equilazation? Derive the

expression for instantaneous motor torque, MOI of the flywheel

and the motor slip. State the assumption made if any.

7. State and explain the law of illumination.

8. Discussed the factor affecting in designing in lighting scheme.

9. Define following term with respect to illumination:

(A) lux, (B) MHCP, (C) lamp efficiency, (D) solid angle,(E)

luminous intensity, (F) ilumination.

Date of Submission: 23.01.2019

Name & Sign of Subject In-charge: Pinkal Patel

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ASSIGNMENT – II


Date: 28.02.2019



1. State different methods of electrical heating and explain

resistance heating

2. What are the essential requirements of good heating element

3. Explain dielectric heating.

4. Discuss the process of electric arc welding

5. Discuss advantages of electric welding and give classification

of electric welding

6. Write principle of resistance welding. Explain Butt welding.

7. State Faraday’s Laws of electrolysis.

8. What is electro plating? Describe it in detail

9. Write and explain the various accessories used for

electroplating plant



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ASSIGNMENT – III


Date: 07.03.2019



1. Draw and explain electrical circuit used in domestic refrigerator

2. With the help of schematic diagram explain the working

principle of air conditioner

3. Draw and explain typical speed time curve for electric traction.

Explain what you understand by Crest speed, Average speed

and Scheduled speed.

4. What do you understand by tractive effort? Derive the

expression for the same.

5. Discuss factors affecting scheduled speed.

6. Compare AC and DC traction system

7. Discuss track electrification in detail



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QUESTION BANK

CHAPTER 1

1. Explain electric drives and it's classification in detail.

2. Explain factor affecting for selection of drive

3. Explain four quadrant operation of drive with suitable diagram

4. State the type of electric bracking. Explain any one in detail.

5. Derive the expression for temperature rise of an electric motor

6. What do you understand by load equalization? Derive the expression for instantaneous

motor torque, MOI of the flywheel and the motor slip. State the assumption made if any.

7. Suggest suitable A.C. & D.C. drives for following applications. Give reasons for the

same. (i) Pump (ii) Hoist (Crane)

8. Distinguish between individual drive & group drive

9. Explain the DC series traction motor control system

10. State the methods of speed control of three phase induction motor and explain any two

methods.

CHAPTER 2

1. State and explain the law of illumination.

2. Discussed the factor affecting in designing in lighting scheme

3. Define following term with respect to illumination:

(A) lux, (B) MHCP, (C) lamp efficiency, (D) solid angle,(E) luminous intensity, (F)

ilumination.

4. Explain working of LPMV lamp with necessary diagram.

5. The illumination in a drawing office 30 m x 10 m is to have a value of 250 lux and is to

be provided by a number of 300-Watts filament lamps. If the coefficient of utilization is

0.4 and depreciation factor is 0.9, determine the number of lamps required. The luminous

efficiency of each lamp is 14 lm/W.

6. List out the drawback of discharge lamps

7. Explain the working of low pressure mercury vapour lamp with necessary circuit

diagrams.

8. State and explain inverse square law and Lambart’s cosine law for illumination.

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CHAPTER 3

1. Explain applications of high frequency eddy current heating.

2. Explain dielectric heating.

3. State different methods of electrical heating and explain resistance heating.

4. Explain concept of microwave heating.

5. List different methods of electrical heating. Explain resistance heating.

6. Explain Ajax Wyatt type induction furnace with diagram.

7. List out the different types of electrodes used in the arc furnaces.

8. What are the essential requirements of good heating element

9. Explain dielectric heating with its applications.

CHAPTER 4

10. Compare Resistance and Arc welding

11. Write principle of resistance welding. Explain Butt welding.

12. Compare AC and Dc arc welding

13. Discuss the process of electric arc welding

14. Discuss advantages of electric welding and give classification of electric welding

CHAPTER 5

15. State Faraday’s Laws of electrolysis.

16. Explain the faraday’s first law of electrolysis

17. What is electro plating? Describe it in detail

18. Write and explain the various accessories used for electroplating plant

19. Write short not on anodizing.

20. Calculate the ampere hours required to deposit a coating of sliver 0.05 mm thick on

sphere of 5 cm radius. Assume electrochemical equivalent of sliver = 0.0001118 and

density of sliver to be 10.5.

CHAPTER 6

21. Draw and explain electrical circuit used in domestic refrigerator.

22. With the help of schematic diagram explain the working principle of air conditioner.

23. Explain principle of air conditioning.

CHAPTER 7

1. State various types of current collectors in common use for overhead contact system.

Describe with a neat diagram the pantograph collector.

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2. Deduce the expression for the total tractive effort for propulsion of train considering

acceleration, up the gradient, to overcome resistance.

3. Discuss factors affecting scheduled speed.

4. What is the requirement of an ideal traction system

5. Draw and explain Speed–time curve for suburban service

6. Briefly explain the factors affecting the schedule speed of a train

7. Define the mainly three types of services used in traction system

8. The distance between two stops is 1.2 km. A schedule speed of 40 kmph is required to

cover that distance. The stop is of 18-s duration. The values of the acceleration and

retardation are 2 kmphp and 3 kmphp, respectively. Then, determine the maximum speed

over the run. Assume a simplified trapezoidal speed–time curve

9. Draw and explain typical speed time curve for electric traction. Explain what you

understand by Crest speed, Average speed and Scheduled speed.

10. What do you understand by tractive effort? Derive the expression for the same.

11. Explain different ways of current collection in Electric traction.

12. Compare AC and DC traction system

13. Discuss track electrification in detail

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Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–VI (NEW) - EXAMINATION – SUMMER 2016

Subject Code:2160907 Date:21/05/2016 Subject Name: Utilization of Electrical Energy and Traction Time: 10:30 AM to 01:00 PM Total Marks: 70 Instructions:

1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks.

Q.1 (a) Discuss rheostatic braking applied to DC motor with neat sketch 07

(b) State the methods of speed control of 3-∅ induction motor and explain any one method in detail.

07

Q.2 (a) Compare AC and DC traction system. 07 (b) Explain following term (1) co-efficient of adhesion (2) schedule speed (3) specific

energy consumption. 07

OR (b) Explain four quadrant operation of a drive with suitable diagrams. 07 Q.3 (a) Define average speed, crest speed and schedule speed and discuss the factors

which affect schedule speed of a train. 07

(b) Discuss advantages of electric welding and give classification of electric welding. 07 OR

Q.3 (a) Discuss the process of electric arc welding. 07 (b) Explain dielectric heating. 07 Q.4 (a) Discuss track electrification in detail. 07 (b) Discuss factors affecting in designing in lighting scheme. 07 OR

Q.4 (a) State and explain square law of illumination. 07 (b) Explain laws of electrolysis. 07 Q.5 (a) Explain operation of an electrical drive in all the four quadrants 07 (b) Explain Ward-Leonard system of speed control with diagram. Also state the

advantages & disadvantages of this method. 07

OR Q.5 (a) What do you understand by Tractive efforts? Derive the expression for the same. 07

(b) Explain factors affecting for selection of drive. 07

*************

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GUJARAT TECHNOLOGICAL UNIVERSITY BE – SEMESTER – VI (NEW).EXAMINATION – WINTER 2016

Subject Code: 2160907 Date: 27/10/2016

Subject Name: Utilization of Electrical Energy and Traction

Time: 02:30 PM to 05:00 PM Total Marks: 70 Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) What do you mean by electric drive? What are the various factors which decide

the choice of an electric drive for industrial application? Explain with example.

07

(b) Draw and explain typical speed time curve for electric traction. Explain what do

you understand by Crest speed, Average speed and Scheduled speed.

07

Q.2 (a) Explain the method of series-parallel starting of DC series motors. What are its

advantages?

07

(b) A 500 tonnes goods train is to be hauled by a locomotive up a gradient of 1 in

40 with acceleration of 1.5 kmphps. Determine the weight of locomotive and

number of axles, if axle load should not exceed 24 tonnes. Coefficient of

adhesion is 0.31, track resistance is 45 N/ton and effective rotational mass is

10% of dead weight

07

OR

(b What do you understand by tractive effort? Derive the expression for the same. 07

Q.3 (a) State the methods of speed control of three phase induction motor and explain

any two methods.

07

(b) Enlist different types of electric braking. Explain in brief along with an

application the regenerative braking of induction motor.

07

OR

Q.3 (a) Explain running characteristics of three phase induction motor. 07

(b) Explain different ways of current collection in Electric traction. 07

Q.4 (a) State and explain inverse square law and Lambart’s cosine law for illumination. 07

(b) Define the following terms with its range w.r. to illumination. (a) Co-efficient

of utilization, (b) Depreciation factor, (c) Waste light factor, (d) Space-height

ratio

07

OR

Q.4 (a) State different methods of electrical heating and explain resistance heating. 07

(b) Explain dielectric heating with its applications. 07

Q.5 (a) Describe the construction and working of an induction furnace suitable for

melting and refining of nonferrous metals.

07

(b) Compare resistance welding and arc welding. 07

OR

Q.5 (a) State and explain Faraday’s Laws of electrolysis. 07

(b) Explain principle of air conditioning. 07

*************

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GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–VI (NEW) EXAMINATION – WINTER 2017

Subject Code: 2160907 Date: 28/11/2017 Subject Name:Utilization of Electrical Energy and Traction Time:02:30 PM TO 05:00PM Total Marks: 70 Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Distinguish between individual drive & group drive. 03

(b) Explain the DC series traction motor control system 04

(c) A 220 V D C shunt motor has an armature resistance of 0.062 ohms and

with full field has an emf of 215V at the speed of 960 rpm. The motor is

driving an over hauling load with torque of 172 N-m. Calculate the

minimum speed at which the motor can hold the load by means of

regenerative braking.

07

Q.2 (a) What is the requirement of an ideal traction system 03

(b) Compare AC and Dc arc welding 04

(c) Explain the different factors to be considered for selection of electrical

drives for specific application. 07

OR

(c) The illumination in a drawing office 30 m x 10 m is to have a value of 250

lux and is to be provided by a number of 300-Watts filament lamps. If the

coefficient of utilization is 0.4 and depreciation factor is 0.9, determine the

number of lamps required. The luminous efficiency of each lamp is 14

lm/W.

07

Q.3 (a) Write a short note on polar curves. 03

(b) List out the drawback of discharge lamps 04

(c) Explain the working of low pressure mercury vapour lamp with necessary

circuit diagrams. 07

OR

Q.3 (a) Draw and explain Speed–time curve for suburban service 03

(b) Briefly explain the factors affecting the schedule speed of a train 04

(c) Determine the diameter and length of the wire, if a 17-kW, 220-V, and

1-Φ resistance oven employs nickel-chrome wire for its heating elements.

The temperature is not exceeding to 1,100°C and the temperature of the

charge is to be 500°C. Assume the radiating efficiency as 0.5 and the

emissivity as 0.9, respectively

07

Q.4 (a) Comparison between resistance and arc welding 03

(b) Define the mainly three types of services used in traction system 04

(c) A high-frequency induction furnace that takes 20 min to melt 1.9 kg of

aluminum, the input to the furnace being 3 kW, and the initial temperature

is 25°C. Then, determine the efficiency of the furnace.

The specific heat of aluminum = 0.212., Melting point = 660°C., The latent

heat of the fusion of aluminum = 76.8 kcal/kg.

07

OR

Q.4 (a) List out the different types of electrodes used in the arc furnaces. 03

2

(b) What are the essential requirements of good heating element 04

(c) The distance between two stops is 1.2 km. A schedule speed of 40 kmph

is required to cover that distance. The stop is of 18-s duration. The values

of the acceleration and retardation are 2 kmphp and 3 kmphp, respectively.

Then, determine the maximum speed over the run. Assume a simplified

trapezoidal speed–time curve.

07

Q.5 (a) Explain the faraday’s first law of electrolysis 03

(b) Six resistances, each of 60 ohms, are used in a resistance; how much

power is drawn for the following connections. With Supply is 400 V,

AC, and single phase and the connections are:

1. Three groups in parallel, each of two resistance units in series.

2. Six groups are in parallel, each of one resistance unit.

3. With the same three-phase supply, they are connected in delta .

04

(c) Write and explain the various accessories used for electroplating plant 07

OR

Q.5 (a) Write short not on anodizing.

03

(b) With the help of schematic diagram explain the working principle of air

conditioner. 04

(c) Calculate the ampere hours required to deposit a coating of sliver 0.05 mm

thick on sphere of 5 cm radius. Assume electrochemical equivalent of

sliver = 0.0001118 and density of sliver to be 10.5.

07

*************

1


GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–VI (NEW) EXAMINATION – WINTER 2018

Subject Code:2160907 Date:15/12/2018 Subject Name:Utilization of Electrical Energy and Traction Time: 02:30 PM TO 05:00 PM Total Marks: 70 Instructions:

1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Attempt all: 03

1 Justify : DC shunt motor should never be started on load.

2 Draw labelled typical speed-time curve for main line service.

3 Write principle of dielectric heating.

(b) Attempt all :

04

1 List main causes of failure of heating elements.

2 State and explain in brief Lambert’s cosine law.

Q.2 (a) Write classification of electrical drive in detail. 03

(b) Write detail specifications of squirrel cage induction motor. 04

(c) Explain different braking methods used for DC series motor. 07

OR

(c) State various types of current collectors in common use for overhead

contact system. Describe with a neat diagram the pantograph collector. 07

Q.3 (a) Explain applications of high frequency eddy current heating. 03

(b) Suggest suitable A.C. & D.C. drives for following applications. Give

reasons for the same. (i) Pump (ii) Hoist (Crane) 04

(c) Explain working of LPMV lamp with necessary diagram. 07

OR

Q.3 (a) Explain concept of microwave heating. 03

(b) List different methods of electrical heating. Explain resistance heating. 04

(c) Draw and explain electrical circuit used in domestic refrigerator. 07

Q.4 (a) State Faraday’s Laws of electrolysis. 03

(b) Compare Resistance and Arc welding. 04

(c) EMU has an average speed of 42 kmph on level track between stops

1400m apart. It is accelerated at 1.7 kmphps & braked at 3.3 kmphps.

Draw speed-time curve for run indicating all numerical values.

07

OR

Q.4 (a) Explain principle of air conditioning. 03

(b) What is electro plating? Describe it in detail. 04

(c) Explain Ajax Wyatt type induction furnace with diagram. 07

Q.5 (a) Define: (i) Candle power (ii) Luminous intensity (iii) Utilization factor 03

(b) State and explain laws of illumination. 04

(c) Deduce the expression for the total tractive effort for propulsion of train

considering acceleration, up the gradient, to overcome resistance. 07

OR

Q.5 (a) Discuss factors affecting scheduled speed. 03

(b) Write different steps for design lighting scheme considering various

parameters. 04

(c) Write principle of resistance welding. Explain Butt welding. 07

************

Documents

LAXMI INSTITUTE OF TECHNOLOGY · 4 AText Book of Electrical Power Dr. S. L. Uppal Khanna Publications 5 Modern Electric Traction H.Partap Dhanpat Rai & Sons 6 Utilization of Electrical