SRM University 2007 B.Tech Electronics and Communications Engineering BANK - Question Paper

157. List out the applications of synchronous motor.
158.What is a V-Curve?
159. Draw the phasor diagram of a synchronous motor operating on leading p.f.
160. elaborate damper windings?
161. discuss the action of damper bars when the load on synchronous motor fluctuates.
162. What is a synchronous condenser?
163. Under what condition synchronous motor will fail to pull in to step?
164. State the applications of synchronous condenser.
165. What is an inverted V-curve?
166. How does the change in excitation affect the p.f. of a synchronous motor.
167. List the methods of starting a synchronous motor.
168.What is hunting?
169. A synchronous motor is connected to TNEB supply. State whether its speed can be variable. cause your ans.
170. Can the shafts of 2 synchronous motors with various poles be coupled? Substantiate your ans.
171. Where are damper bars placed in a synchronous motor? Why?
172. How is the speed of a synchronous motor varied?
173. Why is the synchronous motor not self-starting?
174. What is phase swinging?
175. provide any 4 differences ranging from a three-phase induction motor and synchronous motor.
176. How will you reverse the direction of rotation of a synchronous motor?
176. Does change of excitation affect the synchronous motor speed and p.f.?
177. Why a synchronous motor considered being a constant speed motor?
UNIT – V Design considerations of Electric supply system

178. provide the wiring diagram for looping in system of wiring.
179. provide the wiring diagram for joint box system.
180. How can system voltages can be classified.
181. Draw the structure of electric power systems.
182. What is the relationship ranging from phase and line voltage and current in a 3phase system.
183. What is the necessity of earthing.
184. Draw the wiring diagram of a 3F IM.
185. discuss any 1 kind of earthing.
186. What is the range of voltage fluctuation under Indian Electricity rules.
187. describe cable.
188. How will you assign rating to cables.

Earning:   Approval pending.