GATE EE: 2018 Mini Mock 13 for ESE & GATE EE Exams

Question 1

The locked rotor current in a 3-phase, star connected 15 kW, 6 pole, 220V, 45 Hz induction motor at rated conditions is 40 A. Neglecting losses and magnetizing current, the approximate locked rotor line current drawn when the motor is connected to a 260V, 48 Hz supply is

Question 2

The feedback configuration and the pole-zero locations of

are shown below. The root locus for negative values of k, i.e. for –∞< k < 0, has breakaway/break in points and angle of departure at pole P (with respect to the positive real axis) equal to

Question 3

The voltage regulation of an auto-transformer is superior than that of a 2-winding transformer. It is because:

Question 4

Let x(t) be a periodic signal whose exponential Fourier series coefficients are given as

Which of the following is true?
(i) x(t) is a real signal
(ii) x(t) is even signal
(iii) d_^.x(t)/dt is not even

Question 5

After execution of last arithmetic instruction of a certain program, the content of flag register was found to be 95 H. The contents of accumulator can be

Question 6

For the given rectifier circuit, determine the value of ωt at which the gate signal should be applied to produce an average output voltage of 60 V from a 160 Vrms ac source.

Question 7

The signal x(t) and h(t) shown in the figures are convolved to yield y(t).

Which one of the following figures represent the output y(t).

Question 8

In an inverting OP–AMP, the input bias current is -1μA, and the input and the feedback resistances are both 1MΩ. What will be the output voltage for an input voltage of 2.5V?

Question 9

In a transmission line each conductor is at 20 kV and is supported by a string of 3 suspension insulators. The air capacitance between each cap pin junction and tower is one fifth of the capacitance of each insulator unit. A guard ring, effective only over the line end insulator unit is fitted so that the voltages on the two units nearest the line end are equal. The voltage on the line end unit is ------ kV.

Question 10

A Direct Form Implementation of an LTI system with is shown in figure

The value of a_o,a₁ & a₂ are respectively

Question 11

The equivalent rotor resistance, r₂’ components in the equivalent circuit of a single-phase induction motor, based on two-revolving field theory, at any slip, s are

Question 12

The angle δ in the swing equation of a synchronous generator is the