Exam Details
| Subject | Electrical Machine - I | |
| 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 | June, 2016 | |
| City, State | new delhi, |
Question Paper
Explain the constructional features and working principle of a DC generator.
How are ratings of electrical machines expressed Describe briefly various parts of a DC machine.
Sketch the following types of DC generators
Shunt
Series
Compound
State with reasons where each is used.
What do you mean by armature reaction in DC machines? Show on a diagram its effect on the flux distribution.
Explain the term 'commutation' in DC machines. How can commutation be improved?
A separately excited generator, when running at 1000 r.p.m. supplied 200 A at 125 V. What will be the load current when the speed drops to 800 r.p.m., if it is unchanged Given that the armature resistance 0·04 ohm and brush drop 2V.
Enumerate the three most important characteristics of DC generators.
Explain speed -current and torque current characteristics of a DC series motor.
Compare an autotransformer with a two-winding transformer.
Compare lap and wave windings. Also write their advantages.
What are the conditions for parallel operation of two 3-phase transformers?
Distinguish between power and distribution transformers.
The no load ratio required in a single phase, 50 Hz transformer is 6600/600 V. If the maximum value of flux in the core is to be about 0.08 Wb, find the number of turns in each winding.
Outline the procedure for performing the open-circuit test. What useful information is obtained from the open-circuit test?
8. Write short notes on any two of the following:
E.M.F. generation in DC machines
Equivalent circuit of a transformer
Tap changing transformers
How are ratings of electrical machines expressed Describe briefly various parts of a DC machine.
Sketch the following types of DC generators
Shunt
Series
Compound
State with reasons where each is used.
What do you mean by armature reaction in DC machines? Show on a diagram its effect on the flux distribution.
Explain the term 'commutation' in DC machines. How can commutation be improved?
A separately excited generator, when running at 1000 r.p.m. supplied 200 A at 125 V. What will be the load current when the speed drops to 800 r.p.m., if it is unchanged Given that the armature resistance 0·04 ohm and brush drop 2V.
Enumerate the three most important characteristics of DC generators.
Explain speed -current and torque current characteristics of a DC series motor.
Compare an autotransformer with a two-winding transformer.
Compare lap and wave windings. Also write their advantages.
What are the conditions for parallel operation of two 3-phase transformers?
Distinguish between power and distribution transformers.
The no load ratio required in a single phase, 50 Hz transformer is 6600/600 V. If the maximum value of flux in the core is to be about 0.08 Wb, find the number of turns in each winding.
Outline the procedure for performing the open-circuit test. What useful information is obtained from the open-circuit test?
8. Write short notes on any two of the following:
E.M.F. generation in DC machines
Equivalent circuit of a transformer
Tap changing 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)
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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