Correct Answer:- Option-C
Question43:-The corona effect can be minimized by increasing
A:-The length of the conductors
B:-Spacing between conductors
C:-Diameter of conductors
D:-Both (2) and (3)
Correct Answer:- Option-D
Question44:-The sr, circuit breakers are preferred for substations with
A:-220 KV
B:-110 KV
C:-33 KV
D:-11 KV
Correct Answer:-Question Cancelled
Question45:-For the protection of extra high voltage lines, protective relay used is
A:-Overcurrent with extremely inverse characteristics
B:-Percentage differential relay
C:-Reactance type distance relay
D:-Mho type distance relay
Correct Answer:- Option-D

Question46:-The power system is subjected to a fault which makes zero sequence
component of current to zero. The nature of the fault is

A:-Double line to ground fault
B:-Double line fault

C:-L-G fault

D:-Three phase to ground fault
Correct Answer:- Option-B

Question47:-With the use of high speed CBs which among the following stability is
increased

A:-Steady state stability
B:-Frequency stability
C:-Transient stability
D:-All of the above
Correct Answer:- Option-C

Question48:-Two identical synchronous machines with equal inertia constants are
connected in parallel and oscillating simultaneously. The effective inertia constant
is 4MJ/MVA. What will be the inertia constant of each machine?

A:-2 MJ/MVA