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).
If the span of a transmission is increased by 10%, the sag of line increases by about
Transposition of conductors is done when
For transmission line span of '2L', horizontal tension at tower supports is "T" and weight of conductor per unit length is 'w'. The maximum sag equals
Surge impedance $Z_{c}$ may be expressed in terms of ABCD parameters as below:
The following condition relates the line resistance 'R' and the line reactance 'X' for maximum steady state power transmission on a transmission line
Charging current due to capacitance 'C' when a single-phase line is transmitting power at voltage 'V' and angular frequency $\omega$ is
A short transmission line has equivalent circuit consisting of
Surge impedance of $400\;\Omega$ means
Guy is attached to a transmission pole to
The capacitance between the two conductors of a single-phase two wire line is $0.5\;\mu\text{F/km}$. The capacitance of each conductor to the neutral will be
The string efficiency of an insulator can be increased by
For high voltage applications, insulators used are of
On a transmission line, whenever the conductors are dead ended or there is change in the direction of transmission line, the insulators used are
During rains, the direct capacitance of suspension type insulator
In a string of suspension insulators, maximum potential will appear across the unit
Which insulator can be used either in horizontal or vertical position?
String efficiency being 100 percent means
By using a guard ring, string efficiency of suspension insulators will be
Porcelain insulators are glazed
If the voltage across the string of a string insulator assembly is 38 kV, number of insulation discs are 4 and voltage across the lowermost disc is 12 kV, the string efficiency is
Impurities in the insulator material decreases
Static shielding ________ string efficiency.
Petticoats are provided in the pin type insulators
Disc type insulators employed as suspension insulators have
Seven discs usually suggest that the transmission line voltage is