Electrical Knowledge by Sachin Sir

Q) Routine tests are conducted on A. Bulk oil circuit breakers B. Minimum oil circuit breakers C. Air-blast circuit breakers D. All of the above

Reasoning 76, 23, 99, 122, 221, ?

Reasoning Q) L, G, B, ?, R, M.

The current in a 5 ohm resistor branch of a linear network is 5 A.If this branch is replace by a resistor of 10 ohm. The current in a branch will be

A light bulb draws 300mA when the voltage across it is 240V. The resistance of light bulb is

The resistance R of a conductor is Where E=Electric field intensity A=Cross sectional area J=Current density L=Length of conductor

Q) Buchholz relay is A. Located in the conservator tank B.Located in the transformer tank itself C. Connected in the pipe connecting main tank of transformer and conservator D. Installed in the circuit breaker

Q) Buchholz relays are used on A. Air cooled Transformers    B. Instrument Transformers    C. Distribution transformers    D. Oil immersed power transformers of ratings above 500 kVA

Q) Buchholz relay is a.......relay  A. Oil immersed    B. Arc quenching    C. Gas actuated    D. None of the above

Q) Which value of flux is involved in the emf equation of the transformer ? A) Critical value B) RMS value C) Average value D) Maximum value.