Master official APPSC Assistant Executive Engineer previous years' solved question papers with comprehensive step-by-step derivations across Electric Circuits & Network Theory, Electromagnetic Fields, Electrical Machines, Power Systems (Transmission, Distribution & Protection), Control Systems, Electrical & Electronic Measurements, Power Electronics & Drives, and Analog & Digital Electronics.
Marking pattern: +1.00 positive, -0.33 negative marking (Official APPSC 1/3rd Negative Marking Scheme; 150 Questions, 150 Marks).
When a cable is to cross a road, it should
If power cable and communication cable are to run parallel, the minimum distance between the two, to avoid interference, should be
When the diameter of the core and cable is doubled, the value of capacitance
In a 3-core cable, the colour of the neutral is
In cables, the charging current
Commonest type of 3-phase unsymmetrical fault is
Which of the following statements is true?
Which sequence component is always more than the negative sequence component in asymmetrical fault?
In a double line to ground fault (LLG) the positive, negative and zero sequence networks are
A balanced 3-phase system consists of
To reduce short circuit fault currents ________ are used in substations.
In symmetrical component analysis,
Which of the following figures indicate the zero sequence network of alternator whose star point is grounded through an impedance $X_n$?
In the adjoining figure, find the fault level at F.
The ________ sequence network does not contain any voltage source.
While calculating the fault current, the reactances of the machines connected to the power system are taken to be
The fault MVA is given by
Maximum short circuit current occurs due to
From sequence component voltages $E_{R_{1}}$, $E_{R_{2}}$ and $E_{R_{0}}$ the phase voltages of the lines will be (Pick up false relation)
A 11 kV, 10 MVA alternator has p.u. impedance of 0.1 when referred to its ratings as bases. The new value for base as 110 kV, 20 MVA will be
In a transmission line having negligible resistance, the surge impedance is
Which distribution system is more reliable ?
Alternating current power is transmitted at high voltage
Any voltage surge travelling on the transmission line, first enters
As the height of transmission tower is increased, the line capacitance and line inductance respectively