Important Electrical MCQ all exam Govnt previous paper Last year
Question:- A pole pitch in electrical machine is ?
Answer:- Equal to 180 degree electrical.
Question:- Slip test is performed to determine?
Answer:- direct axis reactant & quadrature axis reactant.
Question:- Why are shunt reactor connected at the receving end of long transmission line system?
Answer:- To compensate voltage rise caused by capacitor charging at light load.
Question:-Drop in alternator frequency is corrected by?
Answer:-Increase prime mover output.
Question:-Earth wire on EHV overhead transmission line provided to protect the line against?
Answer:-Lightning surge.
Question:- Traic is operated at?
Answer:- Power Frequency.
Question:- Open circuit test on a transformer always made on?
Answer:-L.V winding
Question:- What is used to protect a thyristor from high di/dt condition?
Answer:- inductor
Question:-The mobility of electrons in a material is expressed in unit of?
Answer:- m square/V-S
Question:------ motor never use belt connected loads ?
Answer:- series
