List of top Questions asked in Telangana State Post Graduate Engineering Common Entrance Test

A narrowband FM does not have the following feature

The main advantage of TDM over FDM is

A DSB-SC signal can be demodulated using

The maximum permissible distance between two samples of a 2 kHz signal is

The image channel rejection in superheterodyne receiver comes from

Companding is used in PCM to

The plot of modulation index versus carrier amplitude yields a

The state model is _____, the transfer function of the system is ____

The positive RF peaks of an AM voltage rise to maximum value of 12V and drop to a minimum value of 4V. Assuming single tone modulation, the modulation index is

The limit cycles describe the ____ of non-linear systems

Thermal noise is independent of

The characteristic equation of a control system is given by \( s(s+1)(s^2+2s+1)+k(s+2)=0 \). The angles of asymptotes of the root loci are

Consider an open-loop unstable system with the transfer function \( G(s)H(s) = \frac{s+2}{(s+1)(s-1)} \) when the feedback path is closed, then the system is

If the contour of the open-loop transfer function G(s)H(s) corresponding to the Nyquist contour in the s-plane encircle to the point ____, the closed loop system is stable (The blank should be the critical point \((-1+j0)\) or just \(-1\).)

Which of the following is not correct with respect to Phase Lead Compensator?

The gain cross over frequency is the frequency at which the \(|G(s)H(s)|\) is (Note: s should be \(j\omega\) for frequency response magnitude) \(|G(j\omega)H(j\omega)|\)

The main advantage of Bode plot is to

Addition of a pole at the origin to a transfer function rotates the polar plot at zero and infinite frequencies by a further angle of

Impulse response for \(t \ge 0\) of a second order control system when damping ratio = 1 is

The equation for resonant peak of second order system whose transfer function \( \frac{\omega_n^2}{s^2+2\zeta\omega_n s + \omega_n^2} \) is given by (The question asks for the equation *for* the resonant peak \(M_r\), not the resonant frequency \(\omega_r\).)

The IC 8255 is a

The \(a_{ij}\) is the ___ of the branch directed from node \(x_i\) to \(x_j\) in signal flow graph. (Note: The blank is after "is the". Assuming it asks what \(a_{ij}\) represents.)

Position, velocity and acceleration errors of type 2 control system respectively, are

From the following Routh array table, which tells us that there are

\( S^n \)	Col 1	Col 2	Col 3
\( S^5 \)	2	1
\( S^4 \)	3	2	1
\( S^3 \)	\(-\frac{4}{3}\)	\(-\frac{2}{3}\)
\( S^2 \)	\(\frac{1}{2}\)	1
\( S^1 \)	2
\( S^0 \)	1