List of top Questions asked in Andhra Pradesh Post Graduate Engineering Common Entrance Test

The DC and RMS components of currents in a half-wave rectifier are given by the relations?
Penalty factors in economic dispatch with losses are used to:
Which method is preferred for solving the power flow problem in small to medium-sized power systems?
The advantage of hydro-electric power station over thermal power station is:
Fourier transform of \( a_1 f_1(t) + a_2 f_2(t) \) is ________.
A long two-wire line composed of solid ground conductors is 0.5 cm and the distance between their centres is 2 m. If this distance is doubled, then the inductance per unit length _______.
Loading effect is primarily caused by instruments having _______.
A transistor has \( I_E = 10\, \text{mA} \) and \( h_{FE} = 0.98 \). The base and collector currents respectively are _______.
Fourier transform of \( f(t) = 1 \) is ________.
Which of the following systems is time invariant?
A single-phase full bridge inverter is connected to a load of 24 \( \Omega \). The DC input voltage is 48 V. What is the rms output voltage at fundamental frequency?
The maximum reverse bias voltage that can be applied to a reverse biased PN junction diode without damaging the junction is called _______.
The main advantage of IGBT over MOSFET is _______.
Which of the following is NOT a part of the typical speed-time curve for train movement?
Variable frequency drives (VFDs) are used in ________.
The initial value of \( x[n] \) is _______, if \[ X(z) = \frac{3z^2}{(z+3)(z-3)} \]
A DC chopper operates on 230 V DC and frequency of 400 Hz, feeds an R-L load. If the output voltage of chopper is 150 V, the ON time of the chopper is _______.
A transformer has no-load voltage of 220 V and full-load voltage of 210 V. Find voltage regulation.
When the firing angle \( \alpha \) of a single phase, fully controlled rectifier feeding a constant DC current into a load is \( 30^\circ \), the displacement power factor of the rectifier is _______.
In a three-phase full wave AC to DC converter, the ratio of output ripple frequency to the supply voltage frequency is _______.
A 100 km long, three phase, 110 V, 50 Hz overhead transmission line has three conductors each diameter 1.5 cm. The conductors are spaced 2 m at the corners of equilateral triangle. The capacitance of the line is _______.
Determine the fundamental period of the signal \( \cos\left(\frac{\pi}{4}t\right) + \sin\left(\frac{\pi}{3}t\right) \).
A discrete-time signal \( x[n] = \sin(\pi^2 n) \), \( n \) being an integer, is ________.
If \( R_1 \) is the region of convergence of \( x(n) \) and \( R_2 \) is the region of convergence of \( y(n) \), then the region of convergence of \( x(n) * y(n) \) is _______.
Two binary signals ‘a’ and ‘b’ are to be compared. When two signals are equal, then output expression is _______.