Answer / dpk_1fj

DC Machine output is smooth dc voltage and rectifier output
is a pulsating dc voltage.

Answer / saurabh bhardwaj

IT DEPENDS UPON THE POLES IN THE D.C. MACHINE IF THERE ARE TWO
POLES IN D.C. MACHINE IT WORKS AS THE FULL WAVE RECTIFIER
IF WE INCREASE NUMBER OF POLES MORE THAN 2 THEN THERE IS A MORE
DC POWER IN COMPARISON TO FULL WAVE RECTIFIER
THE GENERATOR OUTPUT IS MORE SMOOTH THAN RECTIFIER

Answer / masoom raza

if rectifier is half-wave type then there is difference . in case of dc machine the output will same like full-wave rectifier.as we know that inside dc machine emf induced as sinusoidal but due to commutator the output becomes like full-wave rectifier type.

State the points to be considered for selecting a particular type wiring.

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We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

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Difference between MCC and PDB

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y we are used signal conditioner in capacitive transducer

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What motor is used in ceiling fans and what motor is used in table fan.? why table fan is costlier than ceiling fan?

6 Answers   Bhel,

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HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com

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