List of top Electrical Engineering Questions asked in TS PGECET

A travelling wave of 500/1/55 means a crest value of
The quantities to be obtained at slack bus with usual notations are
Choose the correct one:
Typical values of time constants of a load frequency control system in case of thermal power generation system are related as (Tsg: speed governor, Tps: power system, Tt: turbine)
By using bundle conductor ______
The typical values of voltage regulation and efficiency of a medium transmission line respectively are
_____ is a voltage restrained directional relay.
If short pitch angle of a 3-$\phi$, 2 pole synchronous machine is \(30^\circ\), then pitch factor is
Speed of 3-$\phi$ synchronous motor can be controlled by varying frequency at constant torque at
If voltage of a d.c. servo-motor increases, then the Torque-speed characteristic and slope respectively are
The step angle of a stepper motor is given by
On two sides of a 3-\(\phi\) star / delta transformer the
The input of a 98% efficiency, 2000 rpm separately excited dc motor is 5 kW. The torque output is
The speed of a d.c. series motor at an armature current of 10 A is 800 rpm. If load torque is proportional to square of speed, then at 5 A the speed will be
If \( R_1, R_2, R_3, R_4, R_5 \) are resistances of each of five sections of starter of d.c. shunt motor, then these resistances are
Dummy coils are used in wave wound d.c. machines to reduce
Choose a wrong choice on d.c. machine regarding compoles or compensating winding
Swinburne’s test measures the following on a 200 V, 15 kW dc shunt motor:
Input current = 7 A; Field current = 2 A. Estimate field copper loss and iron \& frictional losses. Assume \( R_a = 0.04 \Omega \)
The current and power factor of a 3–\(\phi\) induction motor at no-load are respectively
A 3-\(\phi\), 400 V, 50 Hz, 4 pole induction motor has rotor resistance and standstill reactance of 0.08 Ω and 0.4 Ω respectively. What is its approximate speed at maximum torque?
The external rotor resistance of a 3-\(\phi\) induction motor is increased more than the resistance required to get maximum starting torque. Then maximum torque occurs in \underline{\hspace{2cm} of Torque (y-axis) – Speed (x-axis) characteristic plot.
A 1-\(\phi\), 230 V, 50 Hz transformer is operated at 230 V, 60 Hz. Then its
Indicate a correct choice on currents during open circuit (OC) and short circuit (SC) tests of transformer
A 11kV/3.3kV, 100 MVA, 3-phase transformer has equivalent impedance seen from LV side of (1.2 + j4.8) Ω. The per unit impedance of the transformer is
If R and X are equivalent resistance and equivalent reactance of a transformer respectively, then at maximum voltage regulation, the power factor is