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, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 2
-VIEP,..
(BTELVI)
Term-End Examinlltion
00633
December, 2016
BIEE-020 aECTRICAL MACHINE$ AND ELECTRONICS
Time: 3 hour$ Maximum Marks: 70
Note: Attempt any Seven qUfstiQns. All questions carry equal marks. Use of Scientific calculator is permitted.
1. Explain how power can be measured by two-wattmeter method for a three-phase balanced load.
2. Draw and explain the phasor diagram of a 1-phase transformer on the following 5+5=10
Unity power factor load
Lagging power factor load
3. The full load voltage drops in a single-phase transformer are and due to resistance and leakage reactance respectively. The full load ohmic loss equal to the iron loss. Calculate
the efficiency on full load at unit p.f,
the load p.f. at which the voltage drop is zero. 5+5=10
4. A 4-pole, 50 Hz, 3-phase induction motor develops a maximum torque of 110 Nm at 1360 r.p.m. The resistance of the star-connected rotor is 0.25 ohm/phase. Calculate the value of resistance that must be inserted in series, with each rotor phase, to produce a starting torque equal to half the maximum torque. 10
5. What are the different types of single-phase induction motors Explain anyone of them in detail. 10
6. Describe steady and dynamic characteristics of electric drives. 10
7. What are the different types of load Explain in detail and also explain the importance of load equalization.
8. Describe the working principle of step-up chopper and also.explain how it is different from step-down chopper. 6+4=10
9. Write short notes on any two of the following: 2 x 5=10
Welding Transformers
Torque -Slip Characteristics of Three-phase Induction Motors
Routine Test of Transformers
-VIEP,..
(BTELVI)
Term-End Examinlltion
00633
December, 2016
BIEE-020 aECTRICAL MACHINE$ AND ELECTRONICS
Time: 3 hour$ Maximum Marks: 70
Note: Attempt any Seven qUfstiQns. All questions carry equal marks. Use of Scientific calculator is permitted.
1. Explain how power can be measured by two-wattmeter method for a three-phase balanced load.
2. Draw and explain the phasor diagram of a 1-phase transformer on the following 5+5=10
Unity power factor load
Lagging power factor load
3. The full load voltage drops in a single-phase transformer are and due to resistance and leakage reactance respectively. The full load ohmic loss equal to the iron loss. Calculate
the efficiency on full load at unit p.f,
the load p.f. at which the voltage drop is zero. 5+5=10
4. A 4-pole, 50 Hz, 3-phase induction motor develops a maximum torque of 110 Nm at 1360 r.p.m. The resistance of the star-connected rotor is 0.25 ohm/phase. Calculate the value of resistance that must be inserted in series, with each rotor phase, to produce a starting torque equal to half the maximum torque. 10
5. What are the different types of single-phase induction motors Explain anyone of them in detail. 10
6. Describe steady and dynamic characteristics of electric drives. 10
7. What are the different types of load Explain in detail and also explain the importance of load equalization.
8. Describe the working principle of step-up chopper and also.explain how it is different from step-down chopper. 6+4=10
9. Write short notes on any two of the following: 2 x 5=10
Welding Transformers
Torque -Slip Characteristics of Three-phase Induction Motors
Routine Test of 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)
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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