GATE EE 2006 | GATE EE Year Wise Previous Years Questions

GATE EE 2006

MCQ (Single Correct Answer)

-0.3

An HVDC link consists of rectifier, inverter transmission line and other equipments. Which one of the following is true for this link?

The transmission line produce/supplies reactive power

The rectifier consumes reactive power and the inverter supplies reactive power from/to the respective connected consumes

Rextifier supplies reactive power and the inverted consumes reactive power to/from the respective connected AC systems

Both the converters (rectifier and inverter) consume reactive power from the respective connected AC systems.

GATE EE 2006

MCQ (Single Correct Answer)

-0.6

A generator is connected through a $$20$$ MVA, $$13.8/138$$ kV step up transformer, to a transmission line. At the receiving end of the line a load is supplied through a step down transformer of $$10$$ MVA, $$138/69$$ kV rating. A $$0.72$$ p.u. load, evaluated, on load side transformer ratings as base values of $$10$$ MVA and $$69$$ kV in load circuit, the value of the load (in per unit) in generator circuit will be

$$36$$

$$1.44$$

$$0.72$$

$$0.18$$

GATE EE 2006

MCQ (Single Correct Answer)

-0.6

The discrete-time signal $$$x\left[n\right]\leftrightarrow X\left(z\right)={\textstyle\sum_{n=0}^\infty}\frac{3^n}{2+n}z^{2n}$$$ where $$\leftrightarrow$$ denote a transform-pair relationship, is orthogonal to the signal

$$y_1\left[n\right]\leftrightarrow Y_1\left(z\right)={\textstyle\sum_{n=0}^\infty}\left(\frac23\right)^nz^{-n}$$

$$y_2\left[n\right]\leftrightarrow Y_2\left(z\right)={\textstyle\sum_{n=0}^\infty}\left(5^n-n\right)z^{-\left(2n+1\right)}$$

$$y_3\left[n\right]\leftrightarrow Y_3\left(z\right)={\textstyle\sum_{n=-\infty}^\infty}2^{-\left|n\right|}z^{-n}$$

$$y_4\left[n\right]\leftrightarrow Y_4\left(z\right)=2z^{-4}\;+\;3z^{-2}+1$$

GATE EE 2006

MCQ (Single Correct Answer)

-0.6

A discrete real all pass system has a pole at $$z = 2\angle {30^ \circ };\,$$ it, therefore,

also has a pole at $$1/2\angle {30^ \circ }$$

has a constant phase response over the $$z$$-plane: $$\arg |H\left( z \right)| = const$$

is stable only if it is anticausal

has a constant phase response over the unit circle: $$\arg |H\left( {{e^{j\Omega }}} \right)| = const$$

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