10.

11.

12

13.

14.

15.

Gain margin is the :

(ಸಿ) magnitude of |G(jw)| at the frequency at which the phase angle is —90°

(B) magnitude of |G{jw)| at the frequency at which the phase angle is —180°

(€) 1೮೦17೫೦೧೩1 01 the magnitude of (G(jw)| at the frequency at which the phase angle
ig =50

(D) reciprocal of the magnitude of [G(jw)| at the frequency at which the phase angle
is —180°

A bipolar transistor is specified to have forward current gain in the range of 8 to 40. The
load resistance is 11 {. The dc supply voltage V. =200 V and input voltage to the base
circuit is 10 V. If Ve, =1.0 V and Vg, =1.5 V, what is the collector saturation current ?

(മ) 1444 ಗಿ (B) 18.09 ۸ (©) 0.045 ^ (D) 1727 &

400
The current rating of a relay is 5 A and it is set at 150%. C.T. ratio is —. Fault current is

5
6000 A. PSM is :
(A) 75 (8) 15 (©) 10 (D) 20

A 11kV 100 MVA alternator is grounded through a resistance of 4 0. The C.T.s have a ratio

500
र्ण डु The relay is set to operate when there is an out of balance current of 2 A. What
percentage of the generator winding will be protected by the percentage differential protection
scheme ?

(^) 93.7 (8) 63 (€) 54.6 (D) 845

A generating station has a connected load of 500 MW and a maximum demand of 300 MW.
The units generated being 600 % 105 per annum. The load factor is :

(മ) 60% (ट) 13.7% © 40% (D) 22.83%

A 132 kV, 200 km long transmission line has a reactance of 0.2 £}/ phase/km. What is its
reactance/ phase in ந.ம on 100 MVA base ?

(ക) 0.2 (8) 0.23 (ಲ) 0.6 (2) 0.174

Which of the following is not true for a fault limiting reactor ?

(A) they limit the short circuit current to a safe value

(8) they protect the circuit breakers which have inadequate rating
(C) they improve the voltage regulation

(D) they avoid the fault from spreading

117/2014 4 A