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

The characteristic equation of a system is given by, \[ s^5 + 10s^3 + 5s^2 + 2 = 0 \] This system is:
Consider the following statements:
A system is said to be stable if its output is bounded for any input.
A system is stable if all the roots of the characteristic equation lie in the right half of the s-plane.
A system is stable if all the roots of the characteristic equation have negative real parts.
A second order system is always stable for finite positive values of open loop gain. Which of the above statements are correct?
The Servo motor differs from standard motor principally in that, it has:
Which of the following types of faults does a bus differential relay NOT effectively detect?
Consider a feedback system with gain margin of about 30. At what point does the Nyquist plot cross the negative real axis?
In a 220kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 micro Farads. The value of the resistor required to be connected across the breaker contacts which will give no transient oscillations is:
In a bode magnitude plot, which one of the following slopes would be exhibited at high frequencies by a 4th order all-pole system?
In a multi-machine interconnected power system, subsequent to a 3-phase fault, the transient stability is examined by:
The Y-bus matrix of a 100-bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be:
An alternator having an induced emf of 1.6 p.u. is connected to an infinite bus of 1 p.u. If the busbar has reactance of 0.6 p.u. and alternator has reactance of 0.2 p.u., what is the maximum power that can be transferred?
Which of the following circuit breakers take minimum time in installation?
For a given power system, its zero and maximum regulation will occur at the impedance angle of:
A protection system engineer is planning to provide complete protection for a 3-phase transmission line. He can achieve this by:
Which of the following is not a requirement for site selection of a hydroelectric power plant?
Efficient Line-Commutated Converter (LCC) HVDC converters generally use:
Fault calculations using computer programs are usually done by:
Which component of gas turbine power plant is the main cause of its low efficiency?
If all the sequence voltages at the fault point in a power system are equal, then the fault is:
A 100 kVA Generator has 10% reactance. Its short circuit kVA is:
The incremental cost characteristics of two generators delivering a total load of 200 MW are as follows: \[ C_1 = 4.01 + 0.1P_1 \, \text{Rs/MWh} \quad \text{and} \quad C_2 = 1.60 + 0.2P_2 \, \text{Rs/MWh} \] What should be the values of \(P_1\) and \(P_2\) for economic operation?
The magnitude of zero sequence current of a generator for LG fault is 2.4 p.u. The current through the neutral during fault in p.u. is:
The main objective of Load Frequency controller is to apply control of:
Two insulator discs of identical capacitance value C make up a string for a 22kV, 50Hz, single-phase transmission line. If the pin-to-earth capacitance is also C, then the string efficiency is:
Starting torque in the case of a 3-phase synchronous motor is:
Breakdown torque in a 3-phase induction motor of negligible stator impedance is: