GTU BE 2019 Summer Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
E - SEMESTER-III (NEW) EXAMINATION - SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code: 2130105 Date: 11/06/2019
Subject Name: Electrical Machines & Electronics
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
| Q.1 | (a) Mention all parts of D.C. generator. | 03 |
| (b) Explain working principle and construction of single phase transformer. | 04 | |
| (c) Write different speed control method for D.C. shunt motor. Explain any one of them. | 07 | |
| Q.2 | (a) Draw and explain the rotor construction of 3-phase squirrel cage induction motor. | 03 |
| (b) Draw and explain salient pole and cylindrical rotor used in an alternator. | 04 | |
| (c) Draw and explain the Torque-Armature current, Speed-Armature current and Speed-Torque characteristics of D.C. series motor. | 07 | |
| OR | ||
| (a) Explain the double field revolving theory. | 07 | |
| Q.3 | (a) Mention all methods to self-start 1-phase Induction motor. | 03 |
| (b) Draw and explain open circuit characteristics of D.C. shunt generator. | 04 | |
| (c) Write different starters used for 3-phase induction motor. Explain any one of them. | 07 | |
| OR | ||
| (a) Mention all necessary condition for parallel operation and synchronization of alternator. | 03 | |
| (b) Explain the difference between ‘core type and shell type transformer. | 04 | |
| (c) Explain internal and external-characteristic of DC generator. | 07 | |
| Q.4 | (a) Explain the advantage of ‘high voltage transmission. | 03 |
| (b) With diagram explain typical layout of AC supply scheme. | 04 | |
| (c) What is tariff? Explain it’s types. | 07 | |
| OR | ||
| (a) Explain Importance of Power factor improvement. | 03 | |
| (b) Draw Key diagram of 66/11 KV substations. | 04 | |
| (c) What is sub-station? Explain the classification of sub-station. | 07 | |
| Q.5 | (a) Explain merits and demerits of underground system for electric supply. | 03 |
| (b) Explain De-Morgen’s theorem | 04 | |
| (c) Draw truth table of AND, OR, NOT, NAND, NOR, EX-OR, EX-NOR gate along with its symbols. | 07 | |
| OR | ||
| (a) Draw and explain pin diagram of IC 741 OPAM. | 03 | |
| (b) Draw the pin diagram of 8085. | 04 | |
| (c) Explain full wave rectifier in detail with the help of circuit diagram and waveforms. | 07 | |
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University