Prepare for the APPSC Inspector of Factories (Electrical) recruitment examination with official previous years' solved question papers across Electrical Circuits & Machinery, Power Generation, Transmission & Distribution, Industrial Substation Design, CEA (Measures Relating to Safety & Electric Supply) Regulations 2010, Indian Electricity Rules 1956, Factories Act 1948 (Electrical Safety Provisions), Earthing Practices (IS 3043), Flameproof Apparatus for Hazardous Explosive Atmospheres (IS/IEC 60079), Protection Relays, and Industrial Fire Safety Systems.
Marking pattern: +1.00 positive, -0.33 (1/3rd) negative marking (Official APPSC Technical CBT Scheme; 150 Questions, 150 Marks).
The most suitable motor for a desk fan is:
The function of compensating winding in a 1-phase series motor is to:
A poly-phase doubly fed commutator motor has:
A Schrage motor is running as a 3-phase induction motor, if brush shift is in the direction of rotor rotation, then:
In a 3-phase core type transformer, the exciting currents for:
A delta-star transformer 1 is operating in parallel with a star-delta transformer 2. If primary to secondary turns ratio per phase for transformer 1 is $k$, then for transformer 2 the primary to secondary turns ratio per phase would be:
For a sinusoidal magnetizing current in a single phase transformer the waveform of flux and induced emfs in both the windings are respectively:
In Scott-connected transformers, main transformer has unity turns ratio. For secondary balanced load current of 10A, the primary current in amperes in the main and teaser transformers are respectively:
If a transformer is switched on when the applied voltage is maximum positive, then there occurs:
The flux responsible for the development of mechanical forces in transformers is:
When primary and secondary windings are not placed symmetrically with respect to the transformer core, the mechanical forces developed are:
In the per unit system, the base values chosen first are:
Can a 50 Hz transformer be used for 25 Hz, if the input voltage is maintained constant at the rated value corresponding to 50 Hz :
For protection of parallel feeders fed from one end the relays required are:
A shunt fault is characterized by:
The most economical load on an underground cable is:
The rate of rise of restriking voltage depends upon :
Where voltages are high and current to be interrupted is low, the breaker preferred is:
A fault is more severe from the view point of RRRV, if it is a/an:
Shunt compensation in an EHV line is resorted to:
The size of conductor on modern EHV lines is obtained based on:
For stability and economic reasons we operate the transmission line with power angle in the range:
For a lumped inductive load with increase in supply frequency:
A voltage controlled bus is treated as a load bus in subsequent iteration when its:
The load flow solution is always assured in case of: