GATE EE 2005 | GATE EE Year Wise Previous Years Questions

GATE EE 2005

MCQ (Single Correct Answer)

-0.3

In relation to the synchronous machines, which one of the following statements is false?

In salient pole machines, the direct-axis synchronous reactance is greater than the quadrature-axis synchronous reactance

The damper bars help the synchronous motor self-start

Short circuit ratio is the ratio of the field current required to produce the rated voltage on open circuit to the rated armature current

The V-curve of a synchronous motor represents the variation in the armature current with field excitation, at a given output power

GATE EE 2005

MCQ (Single Correct Answer)

-0.6

A $$1000$$ $$kVA,$$ $$6.6$$ $$kV,$$ $$3$$-phase star connected cylindrical pole synchronous generator has a synchronous reactance of $$20\Omega .$$ Neglect the armature resistance and consider operation at full load and unity power factor.

The induced $$emf$$ is close to (line to line)

$$5.5$$ $$kV$$

$$7.2$$ $$kV$$

$$9.6$$ $$kV$$

$$12.5$$ $$kV$$

GATE EE 2005

MCQ (Single Correct Answer)

-0.6

The power angle is close to

$$13.9$$ degrees

$$18.3$$ degrees

$$24.6$$ degrees

$$33.0$$ degrees

GATE EE 2005

MCQ (Single Correct Answer)

-0.3

In the matrix equation $$PX=Q$$ which of the following is a necessary condition for the existence of atleast one solution for the unknown vector $$X.$$

Augmented matrix $$\left[ {P|Q} \right]$$ must have the same rank as matrix $$P.$$

vector $$Q$$ must have only non-zero elements.

matrix $$P$$ must be singular

matrix $$P$$ must be square

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