BARC-2018 EE: Full Syllabus Mock 2 for ESE & GATE EE Exams

Question 1

The overhead lines are connected in parallel to supply a load of 10 MW at 0.8 pf (lagging) and 30 kV. The resistance and reactance of one line (A) are 5.5 Ω and 13.5 Ω, respectively; those of the other line (B) are 6 Ω and 11 Ω respectively. The KVA supplied by line B is

Question 2

A unity feedback closed loop control system has

Its root locus technique will give
1) Stable system for K > – 4
2) GM = 1
3) PM = 180°
The correct statements are

Question 3

Below figure shows a full bridge inverter, employed for sinusoidal bipolar pulse width modulation.

Given below shows the sinusoidal wave as the reference and triangular wave as the carrier, and their corresponding output voltage. Which of the following pair of switches are on, when the instantaneous value of the sine reference is less than that of the triangular carrier.

Question 4

For the given n-channel MOSFET, determine the % decrease in the drain current at VGS = 1 V, if the n-channel between the two n-doped regions is removed.
Given that: I_DSS = 8 mA, V_P = -6 V, V_T = 4 V.

Question 5

Let s be a portion of a plane and

be a normal to the said plane. Suppose that the boundary of s is a circle c and the surface area of s is 1. Then the absolute value of line integral

is ________.

Question 6

Two transformers A and B are joined in parallel to the same load. _____ A is the current delivered by transformer A if open circuit voltage is 6600 V for A and 6400 V for B Equivalent leakage impedance in terms of secondary = 0.3 + j 3 for A and 0.2 + j1 for B. The load impedance is 8 + j 6.

Question 7

Consider an 8085-microprocessor system and that the following program starts from 0100H.
MVI C, 90H
MOV B, C
MOV A, B
What will be the contents of registers A and B and program counter value after execution of the above program?

Question 8

A unity feedback control system is characterized by the open-loop transfer function
G(s)=

The Nyquist path and the corresponding Nyquist plot of G(s) are shown in the figures below.

If 0 < K < 1, then the number of poles of the closed-loop transfer function that lie in the right – half of the s-plane is

Question 9

A separately excited DC motor runs at 1000 rpm on no load when its armature terminals are connected to a 200V DC source and the rated voltage is applied to the field winding. The armature resistance of this motor is 1 Ω. The no-load armature current is negligible. With the motor developing its full load torque, the armature voltage is set so that the rotor speed is 500 rpm. When the load torque is reduced to 50% of the full load value under the same armature voltage conditions, the speed rises to 520 rpm. Neglecting the rotational losses, the full load armature current (in Ampere) is _______.

Question 10

Find the total charge contained in an incremental square of a radius 1μm centred at P(3,3,3)
If D = 2

pc/

in free space?

Question 11

Consider the network shown In figure. This system may be represented in state space representation

Take the state variable indicated in the network, evaluate the matrix A and B is

Question 12

A 150MVA, 11kV, 50Hz, 4-pole generator is having inertia constant of 5MJ/MVA. If the acceleration of rotor is 850 elec. degree/s² for 4 cycles, then find the change in the speed of rotor at the end of transient period of 4 cycles?

Question 13

A 1500 kVA, 6600 V, 3 - ϕ, Y connected alternator with a resistance of 0.4 Ω and reactance 6 Ω/ph, delivers full-load current at power factor 0.8 lagging and normal rated voltage. Estimate terminal voltage for the same excitation and load current at 0.8 power factor leading.

Question 14

calculate the volume charge density

at point (3,5,4)mt if the potential field at any point in a space containing a dielectric material of relative permeability 3.2 is given by V= 5xy + 3y²z+5xz
Volts where x,y,z are in meters.

Question 15

A single phase ring distributor ABC is fed at A. The loads at B and C are 20 A at 0.8 pf lagging and 15 A at 0.6 pf lagging respectively, both expressed with reference to voltage at A. The total impedance of the section AB, BC and CA are (1 + j1), (1 + j2) and (1 + j3) ohm's respectively. The current in section BC, I_BC is