1

GATE EE 1996

Subjective

+5

-0

The per unit voltage of two synchronous machines connected through a lossless line are $$0.95\,\,\angle \,{10^0}\,\,$$ and $$1.0\,\,\angle \,{0^0}\,\,$$. Match the two sides in the following

$$(a)$$ Real power of Machine $$1$$

$$(b)$$ Reactive power of machine $$1$$

$$(c)$$ Power factor of Machine $$1$$

$$(a)$$ Real power of Machine $$1$$

$$(b)$$ Reactive power of machine $$1$$

$$(c)$$ Power factor of Machine $$1$$

$$(P)$$ Positive real power

$$(Q)$$ Positive reactive power

$$(R)$$ Negative real power

$$(S)$$ Negative reactive power

$$(T)$$ Leading power factor

$$(U)$$ Lagging power factor

2

GATE EE 1995

Subjective

+5

-0

The distribution factor for a $$36$$ slot stator with three-phase, $$8$$-pole winding, having $${120^ \circ }$$ phase Spread, is _________

3

GATE EE 1992

Subjective

+5

-0

Figure depicts the load characteristics of an constant speed. Match the following sets of operating conditions with the given characteristics. Disregard the effects of saliency, saturation and stator resistance.

$$(a)$$ Constant excitation and non-zero leading power-factor

$$(b)$$ Constant excitation and zero power-factor, leading

$$(c)$$ Constant terminal voltage and zero power-factor, leading

$$(d)$$ Constant terminal voltage and non-zero leading power-factor

Questions Asked from Synchronous Machines (Marks 5)

Number in Brackets after Paper Indicates No. of Questions

GATE EE Subjects

Electric Circuits

Electromagnetic Fields

Signals and Systems

Electrical Machines

Engineering Mathematics

General Aptitude

Power System Analysis

Electrical and Electronics Measurement

Analog Electronics

Control Systems

Power Electronics