ministry of manpower nizwa college of technology engineering · pdf filequality sub-manual for...

For Electrical and Electronics Section Laboratories &

Workshops

Revised November 2017

Version 4

Version Control Summary Sheet

As on November 2017

Ministry of Manpower

Nizwa College of Technology Sultanate of Oman

Nizwa College of Technology | Quality Sub–Manual for E&E Section Labs and Workshop 2

Version Amendment Author Date

1 New Developed Dr.Marichamy September

2008

2

Laboratory staff details Laboratory Resources and Materials Appendices

Mr.Bernard September

2013

3

Laboratory staff details Health & safety Policy Included Laboratory Resources and Materials Appendices Lab procedures to be followed

Mr.Bensujin, Mr.Jijinlal,

Mr.Sudheer & Mr.Byron

December 2015

4

Laboratory staff details Health & Safety Policy updated Laboratory Resources and Sample Manuals & Reports Forms used in Labs. and workshops Appendices

Dr.Bensujin, Mr.Muthukumar S,

Mr.Aleem, Mr.Muneer & Mr.Zephyrin

November 2017


PREFACE

The Quality sub-manual prepared for the Electrical and Electronics Section

Engineering Laboratories and Workshops of the Engineering department forms a part of the

main quality assurance manual of the college. The primary objective of this sub manual is to

ensure use of quality procedures in learning and teaching.

The objectives of this quality sub-manual are:

a. To ensure the desired level of quality and effective use of the resources.

b. To ensure the desired level of accuracy for the activities performed in the laboratories

and workshops.

c. To minimize errors in the activities and to observe deviations, if any from the quality

policy point of view so that necessary corrective measures may be taken.

d. To maintain reliability in the conduct and results of the experiments to the desired

extent.

e. To ensure safety of man power and machineries involved in the various operations

thereby reducing/preventing risks and hazards.


CONTENTS

Chapter Title Page No.

1. Introduction 05

2. The Laboratory staff 05

3 Laboratory Teaching- Learning Process 11

4 Health and Safety 12

5 Maintenance and Testing 16

6 Up-gradation and Improvement 17

7 Laboratory Resources and Materials 17

8 Laboratory structure and Amenities 19

9 Inspection and Internal Auditing 22

10 Conclusion 23

11 Appendix I – Procedures to be followed in Labs &

Workshop 24

12 Appendix II – Sample lab/WS manual 29

13 Appendix III – Sample lab/WS report 45

14 Appendix IV – Forms used in Labs & Workshop 66


1.0 INTRODUCTION

The Quality sub manual is a part of the main quality manual of the college. The

Primary aim of the manual is to ensure quality and achieve uniformity in the following

major activities related to the laboratories:

1. Conducting practical classes.

2. Assessment and evaluation of the performance of the students in the

laboratories and workshops.

3. Procuring and receiving materials.

4. Erection and commissioning of the new equipments and machines.

5. Maintenance of equipments and machines.

6. Ensuring health and safety.

This quality sub manual aims to achieve the following objectives:

1. Desired level of quality and effective use of the resources are ensured.

2. All activities performed in the laboratories and workshops will be to the desired

level of accuracy.

3. Errors in the activities can be minimized and deviations from the quality

policy can be detected and necessary corrective measures can be taken.

4. The experiments conducted and results of the activities can be made reliable

to the desired extent.

5. Risks and Hazards can be prevented ensuring Safety of Human being,

equipment and Machineries involved in the various operations.

2.0 THE LABORATORY STAFF

The college has a policy of keeping qualified, experienced and skilled staff. The

qualification, experience and skills of the laboratory staff shall be in compliance with the

requirement of the Quality Assurance system envisaged by the Ministry of Manpower.

Minimum number of staff suggested for each laboratory session of not exceeding 15

students is

1 Lecturer + 1 Technician/Instructor/Trainer


2.1 TEACHING STAFF

One member of teaching staff from the concerned specialization shall be in charge of

overall supervision and control of each laboratory.

Duties and Responsibilities of Lecturer in-charge of the laboratory/workshop

Preparing teaching materials related to experiments that can be performed

using the equipment in the lab.

Scheduling and conducting Practical Classes/Examinations

Assessment and Evaluation of student activities

Finding out the requirements for the development and informing the HOS

Helping in internal auditing and inspections

Carrying out any other task assigned by the concerned head of department or

staff in charge.

Faculty Members in charge of the Laboratories & Workshop

Sl No.

Name of the Laboratory

Courses Conducted Lecturer in-charge

Qualification

1

Electrical Machines Lab & Power Systems Lab

Electrical Power Technology/ Electrical Power Systems/ Electrical Technology/ Power Distribution Systems/ Power System Analysis/ Machines and Drives/ Energy Conversion Systems

Mr.Muthu Kumar M.E.

2 Electrical Principles Lab Electrical Principles/Electronics Skills

Mr. Srinivasan M.E.

3 Computer Networks & Hardware Lab

Operating Systems/ Computer Networks/ Unix Systems and Administration

Dr. Bensujin M.Tech

4 Electronics Lab Electronics 1/ Electronics 2

Dr.Ravichandran.M

Ph.D

5 Instrumentation & Control Lab

Instrumentation and Measurements Tech/ Engg Instrumentation and Industrial Control/ Instrumentation and Control/ Power Electronics/ Control Systems

Mr. Gobinathan M.Tech

6 Digital Signal Processing Lab

Digital Signal Processing/ Digital Control Systems/ Numerical Methods/ Transient System Stability

Dr.Varghese Ph.D.

7 Digital & Microprocessor Lab

Fundamentals of Digital Electronics/

Mr. Abdul Nasser M.Tech


Digital Electronics/ Logic Circuits and Techniques/ Microprocessor Systems and Interfacing/ Data Communication

8 Electrical Workshop Engg Workshop/

Mr Mohammed Farooq

M.Tech

9 Electrical Skills Electrical Skills/ Electrical Installation and Wiring

Dr.Vimalakeerthi Ph.D

10 Electronics Skills Electronics Skills Dr.Rajkumar Ph.D

11 Computer Aided Design Lab-1

CAD Mr.Mohammed Aleem

M.Tech


Data Structures and Algorithms / Software Engineering

Mr.Mohammed Aleem

M.Tech


Computer Programming for Engg

Mr Zafar Iqbal M.Tech


Computer Programming for Engg

Mr Zafar Iqbal M.Tech

15 Physics Lab-1 Physics 1 Dr.Rajesh Ph.D

16 Physics Lab-2 Physics 2 Dr.Preethy Ph.D

17 Project Lab Project Work Mr.Muneer Mhamdi

M.Tech

2.2 SUPPORTING STAFF

Efficient and smooth functioning of laboratories and workshops requires adequate

number of technical supporting staff backed by necessary specialized qualification and

experience.

2.2. a Trainer /Instructor

Teaching and carrying out the practical training for the set syllabi and

keeping its records, as well as participating in setting up practical

examinations.

Keeping a record of student results, activities and attendance

Carrying out the equipment maintenance schedule

Participating in the practical training activities

Ensuring that health and safety procedures are followed by the students.

Carrying out any other task assigned by the concerned head of department

or staff in charge.


2.2. b Assistant Trainer

Ensuring that health and safety procedures are followed by the students.

Assisting the trainer in organizing and conducting the laboratory practical classes /

workshop practices and practical examinations.

Assisting the trainer in implementing the equipment maintenance schedule.

Ensuring that health and safety procedures are followed in laboratories and

workshops.

Carrying out any other task assigned by the concerned head of department / Section

/ staff in charge.

2.2. c Laboratory/ Workshop Technician

Organizing laboratories and workshops in coordination with the heads of center,

department or section and with lecturer lab in charge

Keeping and updating inventory records of all the materials and equipment in the

laboratories and workshops, in addition to implementing the equipment

maintenance schedule

Cooperating with teaching and technical staff in the preparation, presentation and

production of course materials.

Receiving materials from suppliers, making sure of their compliance with the

specifications and making entries.

Ensuring that health and safety procedures are followed in laboratories and

workshops

Carrying out any other task assigned by the concerned head of department /

Section / staff in charge.

Laboratory Technicians

Sl No. Name of the Laboratory Technician in-charge Qualification

1 Electrical Principles Lab Mr.Reddy M. Tech

2 Electrical Machines Lab & Power Systems Lab

Mr.Sagayanathan B.E.

3 Electrical Workshop Mr.Reddy B.S.EE M.Tech

4 Instrumentation & Control Lab & Power Electronics Lab

Mr.Byron B.S.EE

5 Digital Signal Processing Lab Mr Jijinlal B.Tech.

6 Digital & Microprocessor Lab Mr.Reddy B.S.ECE

7 Electrical Skills Mr.Humaid B.Tech

8 Electronics Skills Mr.Basker M.Tech

9 Electronics Lab Mr.Sudheer M.Tech

10 Computer Networks & Hardware Lab Mr Jijinlal B.Tech.

11 Physics Labs-I Mr. Shamsudeen Mala M.Sc.

12 Physics Labs-II Ms. Deseria

MAE

13 Computer Aided Design Lab-1 Ms.Amira B.Tech.

14 Computer Aided Design Lab-2 Ms.Amira B.Tech.

15 Computer Aided Design Lab-3 Mr. Zephyrin M.E.

16 Computer Aided Design Lab-4 Mr. Zephyrin M.E.

17 Project Lab Mr.Nanthakumar Dr.Suresh

DECE Ph.D


2.3 STAFF TRAINING

Both teaching as well as technical supporting staff shall be conversant with all

equipment and machines. They shall have adequate knowledge on all experiments and

training programs conducted in the lab. Necessary training materials related to the

laboratory operations, equipment and machineries shall be made available in each

laboratory for making the operations and function easier, efficient and systematic.

Necessary training programs shall be arranged for the staff, whenever new equipment or

machineries are installed in the labs, in association with technical experts of the

supplier/manufacturer. The college does conduct an intensive induction program to new

staff joining in each laboratory and workshop.

2.4 INDUCTION PROGRAM FOR THE NEW STAFF

An induction program for a minimum period of one week is to be conducted

for the newly appointed staff before taking charge of any new laboratories so as to

get acquainted with the entire operations and functions of the laboratory. The

activities of the induction program shall include

Safety work practices, safety rules and precautions to be observed in the


Familiarization of the laboratory operations and functioning (including the

overall lab setup, equipment organization, tests and experiments, storage

system, record keeping and updating , indenting methods etc.)

Study and understanding of operations and maintenance procedures of

different equipments and instruments.

Study and identification of the laboratory supply system, power control points,

switches and breakers for emergency operation etc.

Overall understanding of the academic structure, rules and regulations,

examination and students evaluation schemes.

2.5 TIME MANAGEMENT POLICY

The time schedule of the laboratories and workshops is to be arranged in such a

way that a maximum and effective utilization of the laboratory facilities can be

achieved. The student activities and participation in experiments shall be arranged in

such a way that each student will get good exposure to the complete practical aspects

of the experiment. A user’s log book shall be maintained in each laboratory and

workshop to record the daily activities of the students. Daily activities of each


laboratory shall be counter signed by the concerned lecturer/Instructor (see Appendix

A1 for the samples). Such records shall be made available for the internal quality

control and auditing activity. Further these records will help in finding the percentage

utilization of the laboratories as well as the equipment.

3.0 LABORATORY TEACHING – LEARNING PROCESS

Laboratories and workshops shall be equipped and organized with the objective

of giving intensive practical training to students in synchronization with the

principle and laws covered in classrooms. Experiments and inside shop practices

shall be organized according to the course outcomes with a view point of matching

with the global technological developments and information interchange. List of

training programs and experiments conducted shall be displayed in each lab.

3.1 ORIENTATION PROGRAM TO NEW STUDENTS

An intensive and effective orientation program is to be devised in a suitable manner to

the new students before they begin the laboratory or workshop classes. The objective of

the orientation program shall contain the following:

To make them aware of the risks and hazards involved in laboratory works and

shop practices.

To enable them to understand and apply necessary safety rules and precautions.

To familiarize with the laboratory setup, operational methodology and general

procedures involved in the performance of experiments and workshop practices.

3.2 THE ORIENTATION PROGRAM – ACTION PLAN

Familiarizing and Practicing the safety rules and precautions.

Studying and Displaying charts and posters related to Health and Safety

Understanding and use of safety equipment and dress code to be used in


Conducting group discussions and presentations.

Power Point Shows and video shows emphasizing the risks and hazards in

electrical works and safe way of preventing them.

Familiarization and identification of different equipment and supply sources.

Creating awareness strategies about the, dangers involved and precautions needed

in handling the different voltage levels and sources.


Identifying the locations of control points and main switches and breakers for

emergency operations.

Familiarization and practicing of making drill to assembly point in the case of

emergencies.

Practicing the safe evacuation process in hazardous situations such as fire.

Letting them to know the locations of first aid box, fire extinguishers and other

safety equipment.

4.0 ENSURING HEALTH & SAFETY ( Please refer to college Health and

Safety policy for more details)

Safety is the prime requisite in all work places. A safe and healthy working

atmosphere is a basic necessity and has to be ensured in all the laboratories without

failure. A simple mistake may lead to severe hazards and accidents and may even lead to

irrecoverable damage to human lives, equipment and machineries. Strict adherence to

safety rules, practices and precautions can facilitate and ensure a safe onsite working

environment.

Necessary charts, posters and pictures emphasizing the importance of safety,

precautions to be taken, first aid methods etc, shall be displayed in the laboratories and

workshops in addition to necessary instructions and training programs. All the

laboratories and Workshops must provide the safety instructions both in English and

Arabic. The posters on different types of fire extinguisher is displayed on all laboratories

and workshops. The First Aid box is checked randomly to any of the laboratories and

workshops in order to check the expiry date of the medicines by the Health and Safety

committee members of engineering department.

Some of the Do’s and Don’ts are as follows:

Do’s

1. Do the necessary preliminary preparations for the experiment.

2. Do the connections neatly and firmly tightened.

3. Do only the experiment assigned to you.

4. Do the experiment carefully following the correct procedure.

Don’t s

1. Don’t run or play in the laboratory.

2. Don’t eat, drink or smoke in laboratories.

3. Don’t keep unwanted materials in the work table.


4. Don’t touch live conductor or wire with bare hands.

5. Don’t clutter floor and tables with books, bags or cases.

The following safety precautions and guidelines shall be strictly followed in each laboratory:

• Always wear a protective lab coat/overall and safety shoes.

• Locate and identify the positions of main switches, circuit breakers and

emergency switches.

• Make sure of the availability and access to first aid kits, fire extinguishers and

Other safety equipment.

• Identify the emergency exit ways and assembly points to be used in case of fire or similar hazards

4.1 FIRST AID PREPARATIONS

The following first aid preparations shall be done in advance:

• Provide adequate number of first aid kits in each laboratory at locations

which are easily accessible.

• Keep necessary fire extinguishers, sand buckets, and fire blankets in all the


• Ensure their compliance and working condition in accordance with the

specified standards envisaged.

• Install fire alarm cum detector circuits and ensure their proper working

condition periodically.

4.2 TYPES OF HAZARDS

• Regardless of the type of hazard they are all risks and therefore it should be

minimized, if not totally eliminated.

• Hazards include but not limited to the following: Fire, Smoke, natural

calamities, toxic gas release or explosions are examples of the various

hazards which may happen during office hours or in class.

4.3 MEDICAL EMERGENCY

• Contact the college clinic in case of any medical emergency.

• Posters with emergency numbers of college clinic and nearby hospitals shall

be displayed in laboratories and workshops.


4.4 HEALTH AND SAFETY AWARENESS

• The presentation on Health and Safety policy and procedures must be

delivered to the students for the first class of every semester.

• Conduct two mock Evacuation drill to ensure proper preparedness under

emergency conditions.

• Conduct Health and Safety Audit for the laboratories and workshops on every

semester.

• Ensure that safety Procedures are followed by staff and students

4.5 EVACUATION PROCEDURE

• Instruct and direct the students to evacuate the building immediately through

the nearest building exit when notified of an emergency.

• Proceed to the assembly point.

• Proceed to the alternative assembly point decided upon by the college

authority if the designated assembly point is blocked.

• Report the unaccounted or missing persons to the health and safety officers

immediately.

• Remain at the designated assembly point until all -clear signal has given by

the designated health and safety officers.

4.6 PROCEDURE IN THE EVENT OF FIRE

• Raise the alarm immediately if a fire is confirmed or discovered.

• Break the Glass of the nearest location of the fire extinguisher.

• Inform the civil defense on 999.

• Shutdown emergency switches, operation of all machines, equipment and

other electrical devices.

• Turn off gas supplies and gas cylinders.

• Go immediately to the assembly point.






4.7 PROCEDURE IN THE EVENT OF ACCIDENT WORK OR CLASS/LAB

• Provide appropriate first aid treatment.

• Seek help from nearest staff member, for serious cases.

• Take the person to the college clinic for further treatment.

• Report the incident immediately to the Head of unit.

• Inform the family of the injured person.

• Ensure that the insured person is well assisted.

4.8 ELECTRICAL HAZARDS PROCEDURE

(I) MINOR SITUATION

• Report any electrical problems such as faulty wiring, electrical shock,

flickering lights, busted electrical fixtures (switches, lamps etc.) to the college

maintenance department immediately.

• Fill in a maintenance form which is available in the portal for action by the

maintenance department.

• Report the case to the health and safety officer for further action.

(II) SERIOUS AND IMMEDIATE SITUATION

• Instruct and direct the students to evacuate the building immediately through

the nearest building exit when notified of an emergency.

• Proceed to the assembly point.



• Report the unaccounted or missing persons to the health and safety officers

immediately.



4.9 ANNUAL EVALUATION OF EFFECTIVENESS IN HEALTH AND SAFETY COMMITTEE

• The Quantitative Evaluation is estimated by number of activities evolved at

start and end of the academic year as per the ADRI format.

• Online survey will be recorded from the staff for the improvement in

Health and Safety aspects in Engineering Department.


5.0 MAINTENANCE AND TESTING

Strict adherence to the Routine and preventive maintenance schedule is a must for smooth

and reliable operation of all equipment and machineries.

5.1 EQUIPMENT MAINTENANCE SCHEDULE

A proper schedule shall be maintained for the maintenance of each equipment

and machinery. Necessary entries shall be made in the schedule on completion of every

maintenance work, with the signature of technician and supervisor attending the job.

A sample format of maintenance schedule is shown below:

Eq.

No.

Scheduled Date of

Maintenance /service

Actual Date of

maintenance/service

Signature

of

Technician

Signature

of

Supervisor

5.2 MAINTENANCE ACTIVITIES

Following are the various maintenance activities to be carried out in labs and workshops.

Routine and periodic checking and inspections.

Ensuring proper functioning of different parts and elements and equipment.

Cleaning and lubrication of contacts and bearings.

Corrective actions against loose connections and contacts.

Calibration at required periodicity and performance tests.

5.3 REPLACEMENT OR REPAIR

Faulty equipment and machineries shall be repaired or replaced on periodic

basis depending on the type and nature of the defect. All sorts of repair work shall be

carried out only by skilled and authorized service representatives. Equipment which

cannot be repaired shall be replaced for reliable and continuous functioning of the

labs.

5.4 CLEANING OF LABS AND EQUIPMENTS

All laboratory equipment, machines and instruments along with the working premises

including tables, boards etc. shall be kept neat and clean from dust and dirt for safeguarding

human health and durability of the equipment. Only permissible cleaning materials shall be

used for the equipment cleaning.


Keep all the work tables, equipment and machines, instruments, racks and

cabinets from dust, dirt and oil spills.

Periodic Cleaning of the entire laboratory hall shall be carried out without fail.

6.0 UPGRADATION AND IMPROVEMENT

The various activities and operations of the laboratories shall be continuously

monitored and studied for evaluating the performance and necessary corrective actions.

Suitable proposals and suggestions for up gradation and improvement of facilities may be

prepared by taking into consideration the increasing demand and technological growth.

7.0 LABORATORY RESOURCES AND MATERIALS

Modern equipment, machineries and other facilities are to be made available in the

laboratories so that the practical demonstration and experimental verification of laws and

theorems, testing and study of performance characteristics of various devices and practicing

recent ways of installations can be carried out in accordance with developments and

outbreaks in technology.

Detailed list of all the equipment, apparatus, instruments, materials and components etc.

shall be prepared and kept in the laboratory / workshop. The list shall contain all relevant

information with suitable classifications, sub- titles, coding and other important details.

7.1 STORAGE

A proper and well organized store keeping system has to be followed for each

laboratory. Suitable cup-boards, shelves, racks, and cabinets shall be used in the store

for keeping portable equipment, instruments and materials like consumables. Locations

of the different items shall be properly arranged so that each item can be easily

accessed. Technicians in charge of the lab - stores shall keep the stock register and

update the data timely.

7.2 LABELING

All equipment, machineries, instruments and different classes of consumables

shall be provided with suitable labels showing the item name, code and specifications

for easy identification and analysis. Also the storage shelves, cup boards, racks and

cabinets of all materials including consumables are to be properly numbered and

labeled to provide an easy access.


7.3 LABORATORY INDENTING

The technician in charge of the laboratory shall see that any portable instruments,

tools and consumable item issued to students or other user only through proper intends

approved by the staff in charge. Intends shall be kept in the concerned file to ensure the

safe return of all items issued. Items issued for long term use for projects and fabrication

work shall be recorded in the concerned register. Necessary data backup shall be made

periodically in the stock register for all addition and deletion of materials including

consumables.

7.4 LABORATORY PURCHASES

Purchase of materials required for the laboratories (including equipment,

machineries instruments and consumables etc.) shall be made in advance, forecasting the

future needs. All requirements prepared in specified lab requisition form, approved and

countersigned by concerned HoD shall be forwarded to the purchase section for further

processing.

The final purchase order shall be placed after considering the quality of the product,

delivery time, Warranties and provisions for after sale servicing and training.

7.5 RECEIVING AND INSTALLATION OF EQUIPMENTS

New equipment and materials being supplied to the laboratories shall be received by

technician or store keeper after verification of specified quality and working condition

in presence of the staff in charge and suppliers representative. It must be ensured that all

the specifications of the machines supplied are matching exactly as per the purchase

order.

All assembly, installation and commissioning works of sophisticated equipment shall

be carried out by technical experts authorized by the supplier.

The newly purchased equipment shall be tested and certified for proper functioning

in the presence of the supplier's representative.

Operating manuals, catalogs, test certificates and other documents shall be collected

and kept in concerned files.

Necessary entries shall be made in stock registers and records.


8.0 LABORATORY STRUCTURE AND AMENITIES

The Laboratories shall be suitably designed and structured by taking into account the

following key factors:

Proper ventilation and air conditioning

Proper lightning

Main door and emergency exit door

Store room with shelves and cabinets

Supervisors Cabin

First Aid Kit

Fire Fighting equipment

Non Slippery Floor

8.1 UTILIZATION OF LABORATORIES / WORKSHOP RESOURCES

Resource Name: Electrical Machines Lab

Resource Location:EE 101

Staff-in-Charge: Mr.Muthukumar

Technician-in-Charge:Mr.Sagayanathan

S.No Course Code Course Name

1. EEPW 2251 Electrical Power Technology

2. EEPW 3258 Machines and Drivers Lab

3. EEPW 3300 Energy Conversion System

4. EEPW 3142 Electrical Installation and wiring

Design

5. EEPW 4256 Power Stations

6. MIEE 2110/MIOG

2120 Electrical Technology

Resource Name: Electrical principles Lab

Resource Location : EE 102

Staff-in-Charge: Mr.Srinivasan

Technician-in-Charge:Mr.Reddy


1. EEPW 2252 Electrical Power System

2. EEPW 3150 Power Distribution System

3. EEPW 2150 Electrical Principles


Resource Name: Computer Aided Design Lab-1


Staff-in-Charge:Mr.Aleem

Technician-in-Charge:Ms.Amira


1. EECP 1290 Computer Programming For Engineering

2. EECP 2280 Data Structures

3. EECP 4192N Software Engineering

4. EECP 4238 Internet Technology

5. EETE 4212 Telecommunication Networks

6. EECP 3171 Microprocessor systems and interfacing

7. EECP 4282 Computer Aided Digital Design

Resource Name: Computer Aided Design Lab-2


Staff-in-Charge: Mr.Aleem

Technician-in-Charge:Ms.Amira







6. EECP 3171 Microprocessor systems and interfacing

Resource Name: ECAD-1

Resource Location: AD 205

Staff-in-Charge:Mr.Zafar Iqbal

Technician-in-Charge:Mr.Zephyrin







6. CECE 1100 Engineering Graphics

7. MIME 2220 Machine Drawing


Resource Name: ECAD-2

Resource Location: AD 209

Staff-in-Charge:Mr.Zafar Iqbal

Technician-in-Charge:Mr.Zephyrin







6. CECE 1100 Engineering Graphics

7. MIME 2220 Machine Drawing

Resource Name: DSP Lab


Staff-in-Charge:Dr.Varghese

Technician-in-Charge:Mr.Jijinlal


1. EEPW 4153 Transient Stability Power System

2. EEPW 4254 Switchgear and protection

3. EEPW 4259 High Voltage Engineering

4. EEPW 4355 Power System operation and

Reliability

5. EEPW 3200 Control Systems

6. EEPW 3125 Power System Analysis

7. EEPW 4180 Numerical Methods in power

system

8. EETE 3110 Signals and System

9. EETE 3220 Digital Signal Processing

10. MIEE 4210 Control Engineering

11. EECP 3275 Digital Control System


Resource Name: Electrical Skills Lab

Resource Location: New Engineering Building

Staff-in-Charge:Dr.Vimal

Technician-in-Charge:Mr.Humaid


1. EEPW 3142 Electrical Installation & Wiring Design

2. EEPW 2241 Electrical Skills

Resource Name: Electrical Workshop

Resource Location: New Engineering Building

Staff-in-Charge:Mr.Mohd.Farooq

Technician-in-Charge:Mr.Reddy


1. EEPW 1240 Electrical Workshop

Resource Name: Computer Hardware and Networks Lab

Resource Location: EE-103

Staff-in-Charge:Dr.Ben Sujin

Technician-in-Charge:Mr.Jijinlal


1. EECP 2291 Operating Systems

2. EECP 3180 Computer Networks

3. EECP 3283 Computer Architecture

4. EECP 3281 Unix System Administration

5. EETE 4212P Telecommunication Networks

6. EECP 4231 Micro Computer Engineering

7. ITSE 3103 Advanced Operating System

9.0 INSPECTION AND INTERNAL AUDITING

Necessary inspection and auditing activities are to be conducted by the college

internal auditing committee to check the daily activities of the lab, performance of the

staff, material inventory, maintenance and cleaning activities, documentation,

recordings etc. Necessary feedback information shall be collected from students as the

end-users of the laboratory about the facilities, effectiveness of the training and staff

performance.

Periodic Inspection and Internal Auditing will help:


Monitoring and follow up of all the activities in the laboratories

Optimizing the utility of the laboratory and workshop

Improving the quality of services

Formulating an effective time management schedule

Planning for annual improvement and up gradation policies

10. CONCLUSION

The quality sub manual for mechanical laboratories and workshops has been

prepared with the aim of achieving an effective Total Quality Management system

(TQM); which when implemented will ensure the credibility and reliability of the

training and learning activities in the laboratories. Also effective utilization of the

resources, time and space can be achieved. Strict adherence to have HSE rules and

regulations will help in maintaining safety and health of end-users and equipment.

Proper follow-up and monitoring activities based on the manual will help to bring

up the laboratories and workshops in all respect to the desired degree of quality

performance and higher standards.


APPENDIX I

Procedures To Be Followed In Labs & Workshop


MINISTRY OF MANPOWER

NIZWA COLLEGE OF TECHNOLOGY ENGINEERING DEPARTMENT

GENERAL INSTRUCTIONS

PROCEDURES TO BE FOLLOWED IN ENGINEERING MATERIALS LAB

LIST OF DO’s & DONT’s

LIST OF EQUIPMENTS

LIST OF EXPERIMENTS

ASSESSMENT METHOD FOLLOWED

GENERAL SAFETY PRECAUTIONS AND GUIDELINES

LAB LAYOUT DIAGRAM


Procedure to be followed at Machine shop/Workshop

Students need to be given the appropriate overalls and safety shoes, after getting the

signatures for the receipt of the same. At the same time they need to be informed about the

safe handling and maintenance of those items as it will not be given again during their study

in the college, irrespective of the level unless the situation warrants in the opinion of the

HoS or HoD.

Then Instructions need to be given to the students by the lecturer regarding the Health and

Safety Practices in the workshop and the proper code of conduct inside the workshop which

are given below

Students and staff should wear the overalls and safety shoes when they are in the workshop

without which the entry is prohibited.

While working, all the safety items required for the work should be used.

Incase of an accident, the people involved should be given the first aid and the medical

attention immediately. Then an accident report need to be prepared by the labs & workshop

in charge and submitted to the higher authorities.

All near miss incidents need to be recorded and reported.

After the work, students should clean their workplace and have to return all the tools and

safety items that were borrowed, before they leave. Proper follow up is the responsibility of

the lecturer and technician of that class.

It is the technician’s duty to make sure that all the tools and equipments that are required to

handle the class is ready, before the starting of the class.

Littering inside the workshop is an offense.

Students should concentrate in their work when they are inside the workshop. Playing,

shouting, Joking and not obeying the instructions will invite punishments.

After the work, the machines and the equipments need to be switched off.

Malfunctioning of the equipment and the breakage of the tools need to be immediately

reported by the students to the technicians they in turn should record the report and should

take measures to correct the failure.

Eating and drinking inside the workshop is strictly prohibited

All malfunctions of the equipment and the misbehaviors of people need to be immediately

brought to the notice of the workshop in charge in turn to the HoS and HoD.

Following are the various maintenance activities which are to be carried out in the

workshops by the technicians in charge of that workshop

Routine and periodic checking and inspections.


Ensuring proper functioning of different Parts and elements in the equipment.

Cleaning and lubrication of contacts and bearings.

Corrective actions against failures and malfunctioning

Maintaining the stock register, equipment maintenance register and the accident report file

is the responsibility of the technician in charge of the workshop.

The duties of the lecturers who are handling the workshop classes are as follows

Lecturers should prepare the required teaching materials.

Lecturers should teach the students about the concepts, theory and procedures related to the

job before they start the work.

Students shall be taught to understand the circuit diagrams, components and tools required

connection procedures etc.

Detailed description of the procedural steps of the skill /practice shall be given to the students

before they start working on the machines.

Special precautions to be taken while doing a particular job shall be stated with stress and

emphasis.

The quality of the work done by the students shall be checked in real time when they work.

They must ensure that the machines/work tables are cleaned neatly by the students.

Overall performance of the students and reports of the skill/ practice presented by the

students along with the results shall be evaluated and respective grades/mark shall be entered

in the assessment record.

Scheduling, conducting the examinations and assessment is the responsibility of the lecturers.

Maintenance of attendance records and reporting the absentees when they cross 10%, 20%

and 30% limits is also the responsibility of the lecturers.

At the end of the day/week, the technician in charge should lock all the doors after ensuring

the equipment shutdown.

LIST OF DO’s & DONT’s

Do’s

Always pay attention to the work don’t pool around in the lab

Never work in the lab without the supervision of teacher

Always perform experiments precisely as directed by the teacher

Beware of what to do in the event of an emergency

Always wear appropriate PPE


Students are expected to bring laboratory report and the necessary things required to

complete the lab exercise

Maintain the lab clean. After the experiment is finished return the items borrowed.

Don’ts

Don’ts use Mobile phones inside the laboratory.

No food or beverages are allowed in the laboratory

Do not transfer equipment’s from one table (Machine to Machine) to another without

informing the lab in charge.

Do not attempt to repair or modify any lab equipment’s.

Do not touch the equipment’s that are not part of your experimental setup.

LIST OF EQUIPMENTS

List of equipment at Welding Shop

LIST OF EXPERIMENTS

Sl.

No.

Name Quantity


APPENDIX II

Sample Lab / Workshop Manual


Advanced Diploma (Electrical Power Engineering)

EEPW 3300 Energy Conversion System

STUDY OF SOLAR PANEL

Aim:

To study about the Solar Panel.

Theory:

Four types of PV cells

• Selective – Emitter Cell (SEC)

• Emitter wrap- through cells (EWC)

• Thin Film Photovoltaic

• Single Crystal Silicon Cells

Single-Crystal Silicon Cell Construction

• The majority of PV cells in use are the single-crystal silicon type.

• Silica (SiO2) is the compound used to make the cells. It is first refined and

purified, then melted down and re-solidified so that it can be arranged in

perfect wafers for electric conduction. These wafers are very thin.

• The wafers then have either Phosphorous or Boron added to make each wafer

either a negative type layer or a positive type layer respectively. Used together

these two types treated of crystalline silicon form the p-n junction which is the

heart of the solar– electrical reaction.

• Many of these types of cells are joined together to make arrays, the size of each

array is dependent upon the amount of sunlight in a given area.

How does a cell become a module

• A solar cell is the basic building block of a PV system.

• A typical cell produces .5 to 1V of electricity.

• Solar cells are combined together to become modules or if large enough,

known as an array.


• A structure to point the modules towards the sun is necessary, as well as

electricity converters, which convert DC power to AC.

• All of these components allow the system to power a water pump, appliances,

commercial sites, or even a whole community.

• The photoelectric effect relies on the principle that whenever light strikes the

surface of certain metals electrons are released.

• In the p-n junction the n-type wafer treated with phosphorus has extra electrons

which flow into the holes in the p-type layer that has been treated with boron.

• Connected by an external circuit electrons flow from the n-side to create

electricity and end up in the p-side.

The Photoelectric Effect:

The photoelectric effect relies on the principle that whenever light strikes the

surface of certain metals electrons are released.


In the p-n junction the n-type wafer treated with phosphorus has extra electrons

which flow into the holes in the p-type layer that has been treated with boron.

Connected by an external circuit electrons flow from the n-side to create

electricity and end up in the p-side.


A picture of an typical silicon PV cell

• Sunlight is the catalyst of the reaction.


• The output current of this reaction is DC (direct) and the amount of energy

produced is directly proportional to the amount of sunlight put in.

Cells only have an average efficiency of 30%

How PV Systems Work

Stand-Alone Photovoltaic Systems

Grid system

• PV systems are like any other electrical power generating systems, except the

equipment used to generate the power is different.

• Specific components required, and may include major components such as a

DC-AC power inverter, batteries, auxiliary energy sources, sometimes the

specified electrical load (appliances), wiring, surge protection and other

hardware.

• Batteries are often used in PV systems for the purpose of storing energy

produced by the PV array during the day, and to supply it to electrical loads as

needed (during the night and periods of cloudy weather). Also to keep the

system at full operational power

Stand-Alone PV Systems


• Stand-alone PV systems are designed to operate independent of the electric

utility grid

• Supply DC and/or AC electrical loads

• The simplest type of stand-alone PV system is a direct-coupled system, where

the DC output of a PV module or array is directly connected to a DC load

• Since there are no batteries involved in direct load systems, stand-alone PV

systems are suitable for such processes as heating and pumping water,

ventilation fans, etc…Although they can only work in the day.

• Stand-Alone systems may also power AC loads such as batteries. Like the AC

adapter which powers your laptop.


Advanced Diploma (Electrical Power Engineering)

EEPW3257 Power Electronics

SCR CHARACTERISTICS AND ITS APPLICATIONS Aim:

To a) Determine V-I Characteristics of SCR

b) Study the Phase Control using SCR

Apparatus Required:

S.

No. Name of the Apparatus Type / Description Range / Value Qty

Theory:

The acronym SCR means "Silicon Controlled Rectifer". This is a thyristor enabling

the current flowing only in one direction. The bistable action of this component can

be explained through the analysis of its structure.The figure.a shows the symbol of a

SCR with PNPN structure and the circuit equivalent to two transistors coming from

the equivalent structure of the thyristor.

Figure a

If the circuit of two transistors is powered with the circuit shown in the figure b,the

rest current IA is equal to zero because the base of T2 is not powered.


Figure b

If a positive pulse is sent to the emitter base of the transistor TI, this transistor starts

turning on enabling T2 to turn on; the emitter base of T2 is already biased by the

voltage VAK. When T2 turns on, the base of T1 is powered by the same transistor.

Thus, even when the voltage pulse has disappeared from the base of T1,the SCR goes

on turning on if the current IA ensures a sufficient holding "level". In this case the

operation of the two transistors is described by the following formulae: IB1 = IC2;

and IC1 = IB2N.From a theoretical point of view, this switch should be kept closed

until the main current is reduced to zero, but it opens at a value of current intensity

higher than zero; this value is determined by the regeneration limit. The model with

two transistors explains three characteristics of SCRs:

1. a gate current is necessary to control the starting of turn-on process;

2. this process can be held by a minimum current called "holding current";

3. reducing the main current below the holding value will turn the device off.

The figure c shows the main voltage-vs-current characteristic of a SCR without Gate

signal.

Figure c

As it is shown in this figure, the operation of a SCR in conditions of negative voltage

is analogous to that of a standard diode.


When the polarization is positive (anode positive with respect to cathode), the SCR in

open-circuit condition is crossed by a faint leakage current having the same value of

the inverse current (intensity of approximately 1 µA). As the forward voltage rises, an

avalanche point called VBO (breakover) is reached; from this point the current starts

rising quickly and the voltage across SCR suddenly decreases to a very low value

called forward ON voltage (VAKO). When the thyristor turns on, it has a very low

impedance, the voltage across it is very low and it does not depend on current very

much (approximately I or 2 V). Using the gate will enable to control the breakover

voltage. The figure d shows the breakover curves versus the gate current.

Figure d

a) To Determine V-I characteristics of SCR

Circuit Diagram-1:

Procedure:

1) Connections are made as per the circuit diagram.

2) Set the VAK supply to 10 V.

3) Vary the Vgk voltage slowly and note down the anode current. i.e Latching

current,the point at


which SCR fires, gives the value of Forward blocking voltage.

4) Remove the Vgk supply.

5) Reduce the Vak voltage and note down the point at which the SCR is turned off,

that current is

called Holding current.

6) Again make the device ON by using the gate voltage, Vgk.

8) Vary the Vak voltage and note down the Ia current and plot the characteristics as

shown in the

model graph.

9) The On‐state resistance can be calculated by using the formula

10) Plot VI Characteristics of SCR ON Graph sheet and find Ron.

Observation Table:

IH =

IL =

VAK

IA

b) Study the Phase Control of SCR

Circuit Diagram-2:

Procedure:

1. Turn the switch 12 of the modulator to INHIBIT.


2. Connect the probe A of the channel CHI of the oscilloscope across the resistor REI

between the jacks 23 and 24. Thus the triggering pulses of the SCR generated by

the modulator, can be displayed. As it can be verified, they are synchronized with

the line voltage and they have an amplitude of approximately 800 mv.

3. Now turn the switch 12 of the· modulator to ENABLE and shift the probe across

the load between the jacks 24 and ground.

4. Act on the potentiometer P4 and analyze how the trigger varies on the positive

half-period.

Observation Table:

Phase

Angle

(α)

Output

Voltage

Using Multimeter

Number of Y Div(a) X Div Per Volt(b)

= Peak Value(c)

Calculated Value

Calculations:

Draw on graph sheet by proper scale input voltage, output voltage and gate pulse for

a) α = 200

b) α = 450

c) α = 800

Also Calculate Value of output voltage from Waveforms.

Conclusion & Comments:

Write what you understood from the Experiment or comments


ADVANCED DIPLOMA

EECP 3281 - UNIX System Administration (LINUX)

Objective:

Purpose of this lab is to Expertise in Hard disk partition through text mode

Question:

Do the following activity:

List all partition

Find the free space

Create a new partition and format it.

Steps and commands to be followed: 1 Open the new terminal by going to the applications tab on the RHEL desktop.

2 Type the following commands one after another for required experiment to be performed.

parted

p free

fdisk HD Name

n For creating new partition

First Cylinder - Press Enter and continue to the next step

Last Cylinder Enter the size required for new partition in GB or MB (+5G)

w For saving the changes made.

parted HD name To avoid reboot of system and updated the changes

fdisk HD Name To see the new partition created

mkfs.ext3 Partition name For formatting the partition

mkdir DIR name To make a new directory for mounting

mount Partition name Dir name For mounting new partition on the file system

parted HD name To update changes made without rebooting.


BACHELOR

EECP 4192N Software Engineering and High Level Programming UML – Class Diagram - Solution

Objectives:

a. To be familiarized in UML diagrams.

b. To draw a class diagram for relating the real world objects.

Question:

To draw an UML class diagram for a health Care System

Problem statement:

It is decided by the Badr Al Sama hospital to develop a health care system in order to enable

the patients, doctors, nurses and pharmaceutical staff to make the process easily. Automated

machines can be installed to help the patient to diagnose the disease.

The class diagram should contain behavior and property.

Identify minimum of seven classes.

Apply any inheritance technique

Provide different access specifiers for the attribute used

STEPS FOLLOWED:

1. In Star UML select default approach and set Java profile from Model menu

2. Create class diagram inside design model

3. Add different classes with attributes and operations

4. Provide different datatypes for all attributes added

5. Provide the visibility for all the attributes and methods

6. Use Generalization relation for providing inheritance relationship


CLASS DIAGRAM: (Sample with different relationship)


APPLICATION & ADVANTAGES OF CLASS DIAGRAM

Applications:

1. Illustrate data models for information systems.

2. Understand the general overview of an application's schematics.

3. Express the needs of a system and disseminate that information throughout the business.

4. Create detailed charts that focus on the programming code needed to implement the

described structure.

5. Provide an implementation-independent description of types used in a system and passed

between its components.

Advantages:

1. It forces the programmer to think out the structure of his/her classes and how they will interact

with each other before actually writing any code. This may lead to a more robust application.

2. It provides a blueprint for maintenance programmers to get an overview of how the application is

structured before examining the actual code. This may reduce maintenance time.


APPENDIX III

Sample Lab Reports


DIPLOMA (Computer Science)

EECP 2280 - Data Structures and Algorithm

Bubble Sorting using Array

Objective: The purpose of this lab is to apply Bubble sort algorithm for sorting the values in an

array

Question: Write a C program to sort the values in an array using bubble sort algorithm

Procedure:

1. Write the given code in Borland C++

2. Save the file as BubbleSort .c

3. Compile the code

4. Correct errors if you have any

5. Study the given code

6. Run/ Execute the code

Algorithm:


PROGRAM:

Sample input and output:

Input:

Enter number of elements

5

Enter 5 integers


20

31

10

60

22

Output:

Sorted list in ascending order:

10

20

22

31

60

Input and Output:

Sl No: Assessment Process Description Mark(s)

1 Algorithm ( 1 Mark)

2 Program ( 4 Mark)

3 Program Testing ( 3 Marks)

4 Viva ( 2 Marks)

Total (10)

Date Completed: __________ Date Submitted: __________

Signature of Course Tutor: __________


Diploma Second Year

EERE 2201- Introduction to Renewable Energy

V-I Characteristics of Solar PV module

Aim:

To determine the V-I characteristics of solar PV module

Apparatus Required: (0.5 Mark)

S. No. Name of the Apparatus Qty

Block Diagram: (1 Mark)


Procedure: (2 Marks)

Observation: (1 Mark)

Case (i): ___________________________

S.N Output Voltage Output Current

Output Power

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

Case (ii): ___________________________


Output Power

1.

2.

3.


4.

5.

6.

7.

8.

9.

10.

Case (iii): ___________________________


Output Power

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

Case (iv): ___________________________


Output Power

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.


Graph: (2 Marks)

Draw a graph between

(a) Output Current Vs Output Voltage

(b) Output Current Vs Output Power

Model Calculation: (0.5 Mark)

Output Power, P = Output Voltage * Output Current

P = V * I

Conclusion & Comments: (1 Mark)

Marks split-up details:

S.N Description Max.Marks Marks

Obtained

1 Apparatus Required 0.5

2 Block Diagram 1.0

3 Procedure 2.0

4 Observations 1.0

5 Model Calculations 0.5

6 Graph 2.0

7 Comments & Conclusion 1.0

8 Viva 2.0

Total 10


BACHELOR (Computer Science Engineering)

EECP 4192N Software Engineering and High Level Programming

Objectives:

c. To be familiarized in UML diagrams.

d. To draw a class diagram for relating the real world objects.

Question:

To draw an UML class diagram for a health Care System

Problem statement:

It is decided by the Badr Al Sama hospital to develop a health care system in order to enable

the patients, doctors, nurses and pharmaceutical staff to make the process easily. Automated

machines can be installed to help the patient to diagnose the disease.

The class diagram should contain behavior and property.

Identify minimum of seven classes.

Apply any inheritance technique

Provide different access specifiers for the attribute used

STEPS FOLLOWED:

CLASS DIAGRAM:


APPLICATION & ADVANTAGES OF CLASS DIAGRAM

CONCLUSIONS:

Sl No: Assessment Process Description Mark(s)

1 Steps ( 1 Mark)

2 Class Diagram , Inheritance and access specifier representation ( 5

Marks)

3 Application and advantages ( 2 Marks)

4 Viva ( 2 Marks)

Total (10)

Date Completed: __________ Date Submitted: __________

Signature of Course Tutor: ______ ____



EETE 2102:: electronics-1

Rectifiers

Name:

Max : 10 Marks

Student ID:

Section:

Date of Experiment :

OBJECTIVE:

1. TToo ssttuuddyy hhaallff aanndd ffuullll wwaavvee rreeccttiiffiieerrss wwiitthh aanndd wwiitthhoouutt ccaappaacciittoorr ffiilltteerr..

EQUIPMENTS / COMPONENTS REQUIRED:

SL. No.

COMPONENTS

QTY

SPECIFICATION

1 Multimeters 2 MY-69 & FLUKE-115

2 Diodes 4 1N 4007

3 Signal Generator 1 Topward 8150

4 CRO 1 EZ-OS-5060A

5 Resistor 1 1KΩ

6 Transformer 1 500/1000

7 Capacitor 2 2.2µF & 100 µF

Criteria Marks Participation( performance and

discipline) 2

Drawing circuits & curves 2

Connections and Adjustment 2

Measurements 3

Questions , calculation 1

Total


SET up: 1

HALF WAVE RECTIFIER PROCEDURE

Connect the circuit using plug in board. Use sinusoidal input with 10 Vpp and 1 KHz

Display the input and output waveforms using Oscilloscope. Sketch the output waveform. (Figure -1)

Connect an electrolytic capacitor across the resistor and sketch the output waveform. (Figure -2)

CCiirrccuuiitt ddiiaaggrraamm ooff HHWWRR((wwiitthhoouutt CCaappaacciittoorr))::

OOuuttppuutt wwaavveeffoorrmm((FFiigguurree--11))

CCiirrccuuiitt ddiiaaggrraamm ooff HHWWRR((wwiitthh CCaappaacciittoorr))::


OBSERVATIONS Measured Value Theoretical Value

WITHOUT CAPACITOR

DC voltage(VDC)

DC current(IDC)

WITH CAPACITOR ( Measured value)

DC voltage(VDC)

DC current(IDC)

Ripple Factor(r) =

TIME/DIV

VOLT/DIV

TIME/DIV

VOLT/DIV


SET up: 2

FULL WAVE BRIDGE RECTIFIER PROCEDURE

Connect the circuit using plug in board. Use sinusoidal input with 10 Vpp and 1 KHz

Display the input and output waveforms using Oscilloscope. Sketch the output waveform. (Figure -3)

Connect an electrolytic capacitor across the resistor and sketch the output waveform. (Figure -4)

CCiirrccuuiitt DDiiaaggrraamm ooff FFWWRR



TIME/DIV

VOLT/DIV

TIME/DIV

VOLT/DIV


OBSERVATIONS

Measured Value Theoretical Value

WITHOUT CAPACITOR

DC voltage(VDC)

DC current(IDC)

WITH CAPACITOR ( Measured value)

DC voltage(VDC)

DC current(IDC)

Ripple Factor(r) =

CONCLUSION:

QUESTIONS:

1. What difference you notice when you connect (i)47µF, (ii)470 µF & (ii)4700 µF capacitors across the output resistor of rectifiers?

47 µF

470 µF

4700 µF

2-What are the advantages of FWR when compared to HWR?



EETE 3102:: electronics-II

MOSFET AMPLIFIER

Name:

Max : 10 Marks

Student ID:

Section:


OBJECTIVE: 1 . To design and construct a MOSFET amplifier and to study its frequency response.

Components required:

No Name Specifications


discipline) 2



Measurements 3


Total


Circuit diagram

PROCEDURE 1. Draw the circuit diagram of the MOSFET amplifier and connect the circuit. 2. Measure VGS and VDS for the above circuit. 3. Set input voltage in function generator as 0.02 V ( 20 mV). 4. Vary the input frequency from 10 Hz to 10 MHz . 5. For each frequency find the output voltage. 6. Calculate Gain = Vo/ Vi, then Gain in dB = 20 log Vo/ Vi 7. Plot the log frequency Vs Gain (dB) curve. 8. Measure 3 dB lower and upper cutoff frequencies.

OBSERVATIONS:

(i) VGS = _________ ; VDS = __________ (Write the measured values) (ii) The MOSFET used in this experiment is ______ channel __________MOSFET. Frequency Response: Vi = ---------- mV

No Frequency Vo Vo/Vi Gain in dB = 20 log Vo/ Vi

1

Draw the graph of Gain in dB Vs log frequency and obtain the band width. Bandwidth = __________________


Questions

1. From the available measurements and component values, calculate the drain current ID in the circuit.

2. Compare FET amplifiers over BJT amplifiers?

3. List the differences between D-MOSFETs and E-MOSFETs.

4. With the help of circuit diagrams, list the different biasing methods for D-MOSFET and E-MOSFET amplifiers. Which type of biasing is used in this experiment?

Conclusion:



Bachelor Degree

EETE 4140:: LINEAR INTEGRATED CIRCUIT

ADDER, SUBTRACTOR & COMPARATOR USING IC741

OP-AMP

Name:

Max : 10

Marks

Student ID:

Section:


OBJECTIVE: To study the circuit of adder , substractor and comparator using 741

Components required:

No Name Specifications


discipline) 2



Measurements 3


Total


I - ADDER Circuit diagram

PROCEDURE: 1. Connect the components/equipment as shown in the circuit diagram.

2. Switch ON the power supply.

3. Apply dc voltages at each input terminal for V1 and V2 from the dc supply and check the

output voltage Vo at the output terminal.

4. Tabulate different sets of readings by repeating the above step.

5. Compare practical Vo with the theoretical output voltage Vo =V1+V2.

II - SUBSTRUCTOR

Circuit Diagram


PROCEDURE 1. Connect the components/equipment as shown in the circuit diagram.

2. Switch ON the power supply.

3. Apply dc voltages at each input terminal for V1 and V2 from the dc supply and check the

output voltage Vo at the output terminal.

4. Tabulate 3 different sets of readings by repeating the above step.

5. Compare practical Vo with the theoretical output voltage Vo =V2-V1.

III- Comparator:

PROCEDURE 1. Connect the components/equipment as shown in the circuit diagram.

2. Apply 1 KHz sine wave with 5 Vpp at the non-inverting input terminal of IC741 using a function generator.

3. Apply 1V dc voltage as reference voltage at the inverting terminal of IC741.

4. Observe the input sinusoidal signal at channel-1 and the corresponding output square wave at channel-2 of CRO. Note down their amplitude and time period.

5. Overlap both the input and output waves and note down voltages at positions on sine wave where the output changes its state. These voltages denote the Reference voltage. 6. Plot the output square wave corresponding to the sine input with Vref = 1V.


Comparator: Theoretical Reference voltage

(from circuit)

Practical Reference voltage (from output

QUESTIONS: 1.Draw the circuit diagram of 3 input adder.

2. What is the other name for adder?

3. Which amplifier acts as a Subtractor?

4. How many basic input parameters are required for a comparator?

5. Draw the circuit diagram of a non-inverting comparator and inverting comparator.

6. What are the differences between the Inverting and Non–Inverting comparator?

7. What is the name of the comparator if the reference voltage is 0V?

8. Draw the circuit diagram and the output waveform of a Zero Crossing Detector if the

input is sinusoidal?

TIME/DIV

VOLT/DIV

TIME/DIV

VOLT/DIV


APPENDIX IV

Forms used in Labs and Workshop

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