GATE EE 2014 Set 1 | GATE EE Year Wise Previous Years Questions

GATE EE 2014 Set 1

Numerical

-0

A star connected 400 V, 50 Hz, 4 pole synchronous machine gave the following open circuit and short circuit test results:
Open circuit test: V_OC = 400 V (rms, line–to–line) at field current, I_f = 2.3 A
Short circuit test: I_SC = 10 A(rms, phase) at field current, I_f =1.5 A
The value of per phase synchronous impedance in Ω at rated voltage is __________.

Your input ____

GATE EE 2014 Set 1

MCQ (Single Correct Answer)

-0.6

A three phase synchronous generator is to be connected to the infinite bus. The lamps are connected as shown in the figure for the synchronization. The phase sequence of bus voltage is $$R$$-$$Y$$-$$B$$ and that of incoming generator voltage is $$R'$$ - $$Y'$$ - $$B'.$$ GATE EE 2014 Set 1 Electrical Machines - Synchronous Machines Question 22 English

GATE EE 2014 Set 1 Electrical Machines - Synchronous Machines Question 22 English

It was found that the lamps are becoming dark in the sequence $${L_a} - {L_b} - {L_c}.$$ It means that the phase sequence of incoming generator is

opposite to infinite bus and its frequency is more than infinite bus

opposite to infinite bus but its frequency is less than infinite bus

same as infinite bus and its frequency is more than infinite bus

same as infinite bus and its frequency is less than infinite bus

GATE EE 2014 Set 1

MCQ (Single Correct Answer)

-0.6

The following four vector fields are given in cartesian coordinate system. The vector field which does not satisfy the property of magnetic flux density is

$$y^2{\widehat a}_x\;+\;z^2{\widehat a}_y\;+\;x^2{\widehat a}_z$$

$$z^2{\widehat a}_x\;+\;x^2{\widehat a}_y\;+\;y^2{\widehat a}_z$$

$$x^2{\widehat a}_x\;+\;y^2{\widehat a}_y\;+\;z^2{\widehat a}_z$$

$$y^2z^2{\widehat a}_x\;+\;x^2z^2{\widehat a}_y\;+\;x^2y^2{\widehat a}_z$$

GATE EE 2014 Set 1

MCQ (Single Correct Answer)

-0.3

Given a system of equations $$$x + 2y + 2z = {b_1}$$$ $$$5x + y + 3z = {b_2}$$$
Which of the following is true its solutions

The system has a unique solution for any given $${b_1}$$ and $${b_2}$$

The system will have infinitely many solutions for any given $${b_1}$$ and $${b_2}$$

Whether or not a solution exists depends on the given $${b_1}$$ and $${b_2}$$

The system would have no solution for any values of $${b_1}$$ and $${b_2}$$

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