Friday, 20 April 2012

Electrical titbits

Q) What is efficiency of Electric Locomotive compared to Steam?

Ans) Steam loc 6 %, Electric Loco 45 %

Q) Which load forms sizeable base load for grid?

Ans) Electric Traction

Q) What is effect of low frequency on motor?

Ans) It improves commutation of DC machines and p.f. and efficiency is also increased.

Q) What is advantage of DC series motor vs ac series motor?

Ans) DC series motor develops more starting as well as running torque for same size than ac motor.

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