GATE EE topic:electrical-machines PYQs & Answers — Page 10

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Questions 91–100 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 10 of 72

The operating region of the developed torque (

) and speed (

) of an induction motor drive is given by the shaded region OQRE in the figure. The load torque (

) characteristic is also shown. The motor drive moves from the initial operating point O to the final operating point S. Which one of the following trajectories will take the shortest time?

Diagram for Electrical Engineering question 26

Your answerChoose one option.

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The input voltage

and current

of a converter are given by,

where,

. The input power factor of the converter is closest to

Your answerChoose one option.

0.845

0.867

0.887

1.0

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Instrument(s) required to synchronize an alternator to the grid is/are

Your answerSelect all correct options. You can choose more than one.

Voltmeter

Wattmeter

Synchroscope

Stroboscope

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The open loop transfer function of the system shown in the figure, is

. For

, which of the following real axis point(s) is/are on the root locus?

Diagram for Electrical Engineering question 29

Your answerSelect all correct options. You can choose more than one.

−1

−4

−6

−10

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A continuous time periodic signal

. If

is the period of

, then

______ (round off to the nearest integer).

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The maximum percentage error in the equivalent resistance of two parallel-connected resistors of 100

and 900

with each having a maximum 5% error is ______ % (round off to nearest integer value).

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Consider a distribution feeder, with

ratio of 5. At the receiving end, a 350 kVA load is connected. The maximum voltage drop will occur from the sending end to the receiving end, when the power factor of the load is __________ (round off to three decimal places).

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The bus impedance matrix of a 3-bus system (in pu) is

. A symmetrical fault (through a fault impedance of

pu) occurs at bus 2. Neglecting pre-fault loading conditions, the voltage at bus 1, during the fault is ______ pu (round off to three decimal places).

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In the circuit with ideal devices, the power MOSFET is operated with a duty cycle of 0.4 in a switching cycle with

and

. The power delivered by the current source, in W, is __________ (round off to the nearest integer).

Diagram for Electrical Engineering question 34

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The induced emf in a 3 kV, 4 pole, 3-phase star connected synchronous motor is considered to be equal and in phase with the terminal voltage under no load condition. On application of a mechanical load, the induced emf phasor is deflected by an angle of 2° mechanical with respect to the terminal voltage phasor. If the synchronous reactance is

, and stator resistance is negligible, then the motor armature current magnitude, in ampere, during loaded condition is closest to, __________ (round off to two decimal places).

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GATE EE topic:electrical-machines PYQs

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35