CL wadhwa bits solutions (110-114)

Lesson 19 of 21 • 36 upvotes • 7:34mins

Anvesh Sameer

110. If δ is the loss angle of the cable, its power factor is: (a) sin δ (b) cos δ (c) Power factor is independent of δ (d) Power factor depends upon δ but it is not as per (a) and (b). 111. The effect of bonding the cable is: (a) To increase the effective resistance and inductance (b) To increase the effective resistance but reduce inductance (c) To decrease the effective resistance and inductance (d) To decrease the effective resistance but increase the inductance. 112. In order to eliminate sheath losses, a successful method is: (a) To transpose the cable along with cross bonding (b) Transpose the cables only (c) Cross bonding the cables is enough (d) None of the above is effective. 113. The sending end voltage of a feeder with reactance 0.2 p.u. is 1.2 p.u. If the reactive power supplied at the receiving end of the feeder is 0.3 p.u., the approximate drop of volts in the feeder is: (a) 0.2 p.u. (b) 0.06 p.u. (c) 0.05 p.u. (d) 0.072 p.u. 114. If a synchronous machine is overexcited, it takes lagging vars from the system when it is operated as a: (a) Synchronous motor (b) Synchronous generator (c) Synchronous motor as well as generator (d) None of the above.