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).
The gas used in sodium vapour lamp is
While calculating Thevenin's equivalent resistance
A synchronous machine connected to a power system grid bus-bar is operating as a generator. To make the machine operate as a motor, the
The speed of a synchronous motor depends upon
In the circuit of series RL given in fig., V is given by
Ward-Leonard method of speed control is basically a
Two dc series motors connected in series draw current I amps from supply and run at speed N. When the same motors are connected in parallel taking current I amps from the supply, the speed of each motor will be
The purpose of providing dummy coils in dc machine armature is to
In the circuit of fig. given, $v(t)$ for $t > 0$ is given by
If the back emf of a dc motor is doubled and its speed is also doubled, the torque developed in the machine will
The most efficient electrical machine is the
Oil in a transformer is used for
What percent of the input energy is radiated by filament lamps ?
The no-load current of a single phase induction motor is around ________ % of full load current.
For zero leading power factor, the effect of armature reaction on the main flux in an alternator is
Carbon arc lamps are commonly used in
Shaded pole induction motor does not have the advantage of
Which of the following need lowest level of illumination?
The distance between two coil sides which are connected to the same commutator segment is called as
In a dc shunt motor, if the speed is to be maintained constant irrespective of load variations, the method used is
In an autotransformer, the power transferred inductively to the load is proportional to
The hunting in synchronous motors is prevented by providing
The rotor power output of a 3-phase induction motor is $15\text{ kW}$. If the motor is operating at a slip of $4\%$, the rotor copper loss is
In an electrodynamometer type wattmeter, the fixed coils are known as
Buchholz relay cannot be used in