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 | December, 2015 | |
City, State | new delhi, |
Question Paper
1. Write short notes on any two of the following:
Four-point starter
Compound d.c. generator
Auto-transformer
2. Discuss the cross-magnetising and demagnetising effects of armature reaction in d.c. machine. Also, explain the methods of decreasing the effects of armature reaction in detail.
Why is d.c. series motor not started at no load Justify your answer With suitable characteristic.
A 250 V compound generator has armature, series-field and shunt-field resistances ·0·4 ohms, 0·2ohms and 125 ohms, respectively. If this generator supplies 10 kW at rated voltage, determine the emf generated In the armature when the machine is connected as long shunt.
Discuss the speed control of .d.c. motor using Ward-Leonard method.
Explain the significance of back emf in a d.c. motor.
Explain the open circuit test of a single-phase transformer with the help of a connection diagram.
A 200 kVA 11000/400 delta-Y transformer, gave the following no-load test:
Test Voltage 400 V
Test Current 9A
Power Consumed =1·5 kW.
Determine the equivalent circuit parameter referred to high voltage side.
Establish the condition for determining maximum efficiency ofa transformer.
A 10 kVA, 2500/250 single phase transformer gave the following test results:
Open-circuit test: 250 50 W
Short-circuit test: 60 3 45 W.
Calculate the efficiency at half full load at 0.8 pf
Explain the working of a tap changer transformer using schematic diagram.
Explain power and distribution transformers in detail.
Four-point starter
Compound d.c. generator
Auto-transformer
2. Discuss the cross-magnetising and demagnetising effects of armature reaction in d.c. machine. Also, explain the methods of decreasing the effects of armature reaction in detail.
Why is d.c. series motor not started at no load Justify your answer With suitable characteristic.
A 250 V compound generator has armature, series-field and shunt-field resistances ·0·4 ohms, 0·2ohms and 125 ohms, respectively. If this generator supplies 10 kW at rated voltage, determine the emf generated In the armature when the machine is connected as long shunt.
Discuss the speed control of .d.c. motor using Ward-Leonard method.
Explain the significance of back emf in a d.c. motor.
Explain the open circuit test of a single-phase transformer with the help of a connection diagram.
A 200 kVA 11000/400 delta-Y transformer, gave the following no-load test:
Test Voltage 400 V
Test Current 9A
Power Consumed =1·5 kW.
Determine the equivalent circuit parameter referred to high voltage side.
Establish the condition for determining maximum efficiency ofa transformer.
A 10 kVA, 2500/250 single phase transformer gave the following test results:
Open-circuit test: 250 50 W
Short-circuit test: 60 3 45 W.
Calculate the efficiency at half full load at 0.8 pf
Explain the working of a tap changer transformer using schematic diagram.
Explain power and distribution transformers in detail.
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