CL wadhwa bits solutions (35-40)

Lesson 7 of 21 • 59 upvotes • 13:17mins

Anvesh Sameer

35. An overhead line with series compensation is protected using: (a) Impedance relay (b) Reactance relay (c) Mho relay (d) None of the above. 36. The typical value of SCR for modern alternators is: (a) 1.5 (b) 1.2 (c) 1.0 (d) 0.5 . 37. In case of a large size alternator the voltage control becomes serious if: (a) SCR is high (b) SCR is low (c) Voltage control is independent of SCR. 38. A large-size alternator is protected against overloads by providing: (a) Overcurrent relays (b) Temperature sensitive relays (c) Thermal relays (d) A combination of (a) and (b) (e) A combination of (b) and (c). 39. The impulse ratio of a rod gap is: (a) Unity (b) Between 1.2 and 1.5 (c) Between 1.6 and 1.8 (d) Between 2 and 2.2. 40. Shunt compensation in an EHV is resorted to: (a) Improve the stability (b) Reduce the fault level (c) Improve the voltage profile (d) As a substitute for synchronous phase modifier.