CL wadhwa bits solutions (66-71)

Lesson 12 of 21 • 35 upvotes • 10:37mins

Anvesh Sameer

66. Effect of increase in temperature in overhead transmission lines is to: (a) Increase the stress and length (b) Decrease the stress and length (c) Decrease the stress but increase the length (d) None of the above. 67. The Buchholz relay protects a transformer from: (a) All types of internal fault (b) A turn to turn fault (c) Winding to winding fault (d) None of them. 68. The Self GMD method is used to evaluate: (a) Inductance (b) Capacitance (c) Inductance and capacitance both (d) None of the above of the overhead transmission lines. 69. A voltage-controlled bus is treated as a load bus in subsequent iteration when its: (a) Voltage limit is violated (b) Active power limit is violated (c) Reactive power limit is violated (d) Phase angle limit is violated. 70. The voltage of a particular bus can be controlled by controlling the: (a) Phase angle (b) Reactive power of the bus (c) Active power of the bus (d) Phase angle and reactive power. 71. In case of a 3-phase short circuit in a system, the power fed into the system is: (a) Mostly reactive (b) Mostly active (c) Active and reactive both equal (d) Reactive only.