Exam Details
| Subject | Electrical Machines And Electronics | |
| Paper | ||
| Exam / Course | B.Tech. VIEP- Electrical Engineering III (BTCSVI/BTECVI/BTELVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
1. Explain in detail the effect of power factor on the wattmeter readings in case of power measurement of a 3-phase load by two-wattmeter method for all possible values of power factor.
2. Three identical impedances of 12 L30° ohms In delta connection and three identical impedances of 5 L45° ohms in star connection are on the same three-phase 3-wire 173/100 volt system. Find the line current and total power.
3. The efficiency of a 400 kVA single phase transformer is 98·77%, when delivering full load at 0·8 power factor and 99·13% at half load and unity power factor. Calculate the
iron loss, and
the full load copper loss.
4. Derive the emf equation of a transformer and define voltage regulation of a transformer.
5. Explain the construction and working of a 3-phase induction motor with the help of neat sketches.
6. Give the applications of d.c. series, d.c. shunt, 3-phase induction and synchronous motors. Justify their uses with the help of their speed -torque characteristics.
7. Justify the use of chopper and inverters in the control of electric drives. Give their advantages over conventional methods of control of electric drives.
What are the factors affecting the selection of motors for a drive?
What are the different types of loads
9. Why is single phase induction motor not self-starting What are the different ways to make it self-starting Explain anyone method in brief.
10. Write short notes on any two of the following:
Testing of 3-phase induction motors
Characteristics of thyristors
Welding transformers
2. Three identical impedances of 12 L30° ohms In delta connection and three identical impedances of 5 L45° ohms in star connection are on the same three-phase 3-wire 173/100 volt system. Find the line current and total power.
3. The efficiency of a 400 kVA single phase transformer is 98·77%, when delivering full load at 0·8 power factor and 99·13% at half load and unity power factor. Calculate the
iron loss, and
the full load copper loss.
4. Derive the emf equation of a transformer and define voltage regulation of a transformer.
5. Explain the construction and working of a 3-phase induction motor with the help of neat sketches.
6. Give the applications of d.c. series, d.c. shunt, 3-phase induction and synchronous motors. Justify their uses with the help of their speed -torque characteristics.
7. Justify the use of chopper and inverters in the control of electric drives. Give their advantages over conventional methods of control of electric drives.
What are the factors affecting the selection of motors for a drive?
What are the different types of loads
9. Why is single phase induction motor not self-starting What are the different ways to make it self-starting Explain anyone method in brief.
10. Write short notes on any two of the following:
Testing of 3-phase induction motors
Characteristics of thyristors
Welding transformers
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Active Filter Design
- Advanced Control System
- Advanced Power Electronics
- Applied Electromagnetics
- Basics Of Electrical Engineering
- Computer Process Control
- Control System
- Digital Electronics
- Electric Energy Utilization
- Electrical And Electronics Engineering Materials
- Electrical Instrumentation
- Electrical Machine - I
- Electrical Machines - Ii
- Electrical Machines And Electronics
- Electrical Measurements And Measuring Instruments
- Electro Mechanical Energy Conversion - I
- Electro-Mechanical Energy Conversion - Ii
- Electro-Mechanical Energy Conversion-Iii
- Electromagnetic Theory
- Energy Auditing And Analysis
- High Voltage Engineering
- Industrial Drives
- Micro Controllers
- Microprocessor And Applications
- Network Theory
- Power Quality Issues And Remedial Measures
- Power System
- Power System - I
- Stochastic Control Systems
- Switchgear And Protection