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

If \( \bar{x} = 4 \), \( \bar{y} = 8 \), \( \sigma_x = 2 \), \( \sigma_y = 3 \), and \( r = 0.3 \), then the line of regression of \( y \) on \( x \) is
If \( f(z) \) is analytic at \( z_0 \), then it is
If \( \text{div}~\vec{F} \) of any vector \( \vec{F} \) is zero, then it is
The general solution of \( z = px + qy + p^2q^2 \) is
Matrix \( A \) has \( x \) rows and \( x + 5 \) columns. Matrix \( B \) has \( y \) rows and \( 11 - y \) columns. Both \( AB \) and \( BA \) exist, then
Particular integral of the partial differential equation \( \frac{\partial^2 z}{\partial x^2} - 2 \frac{\partial^2 z}{\partial x \partial y} + \frac{\partial^2 z}{\partial y^2} = 2x \cos y \) is
The minimum value of the function \( x^2 + y^2 + z^2 \) if \( x + y + z = 3a \)
The speed time curve of the urban service has no
Which type of load can give load commutation in a single-phase thyristor bridge inverter
Which motor is preferred for electric traction purpose?
Calculate the velocity of the bottom point of the wheel for perfect rolling using the data: r = 20 cm, \( \omega = 100 \text{ rad/sec} \)
A train moving at a speed of 63 km/hr enters a railway station and crosses the platform in 20 sec. If the length of the train is 100 m, what is the length of the platform?
The value of area under a velocity-time graph is
The wheels of a train, engine as well as bogies, are slightly tapered to
In _____ type of modulation method, the pulse width is not equal for all the pulses.
A single-phase voltage controller has input voltage of 210V and load R = 10 ohm. For 4 cycles on and 5 cycles off, the rms output voltage is
In a single-phase full converter, if output voltage has peak and average voltage values of 325V and 133V respectively, then the firing angle is
In a single pulse width modulated inverter, to eliminate the third harmonic, pulse width must be
The shape of the output voltage waveform in a single PWM is
In the rotor voltage injection method, when an external voltage source is in phase with the main voltage then speed will
What is the average value of output of a chopper with duty ratio 0.5 and source voltage of 50V?
When the gate signal from a thyristor is removed, it will remain in its forward conduction mode. This characteristic of thyristor is called
On which of the following does the scale current not depend upon?
The classic multivibrator circuit is known as:
In a half wave bridge inverter circuit, the power delivered to the load by each source is given by