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).
In electric discharge lamps, light is produced by
Which of the following bulbs operates on least power?
The gas used in sodium vapour lamp is
In capacitor start single-phase induction motor, the current in the
A 3-phase induction motor is operating at slip $s$. If the two supply leads are interchanged, then its slip at that instant will be
For precision work, the illumination level required is of the order of
The deflecting torque of a moving iron instrument is
The range of an electrostatic voltmeter can be extended by using
The RC circuit shown in fig. is fed from an ac source of frequency $\omega\text{ rad/s}$. The power factor of the circuit is
In a shaded pole motor the phase splitting is achieved by placing a shading coil at the slot cut around the
For instruments with very weak magnetic field, we use
Speed of a dc shunt motor beyond the rated speed can be increased by
While performing the open-circuit and short-circuit tests on a transformer to determine parameters, the status of low voltage (LV) and high voltage (HV) winding will be such that
Two holes are drilled in the disc of energy meter on the opposite sides of the spindle
The purpose of providing compensating winding in a dc motor is to
The fall in terminal voltage of a loaded dc shunt generator is mainly due to
The voltage regulation of an over compounded dc generator on full-load is
In the circuit of fig. below, $R_{eq}$ is given by
In a dc shunt motor, if the terminal voltage is reduced to half, torque remaining the same, the
In an alternator, the distribution factor $k_{d}$ is given by
The operation of a 3-phase synchronous motor operating on constant excitation across infinite bus will not be stable if power angle $\delta$
The dc motor used for intermittent high torque loads is
A cumulative dc compound motor runs at 1500 r.p.m. on full load. If its series field is short-circuited, its speed
The following instrument is not a current operated instrument:
A synchronous motor is delivering 80% of its rated output and is operating at UPF. If its excitation is increased, then