The current in armature conductors of a dc machine is ______ Ac Pure dc plus pulsating dc Pure dc Pulsating dc TRUE ANSWER : ? YOUR ANSWER : ?
The main drawback of a dc shunt generator is that Shunt field circuit has high resistance Generated voltage is small Terminal voltage drops considerably It is expensive TRUE ANSWER : ? YOUR ANSWER : ?
In dc generator, the constant losses is equal to Stray losses plus shunt cu loss None of the listed here Mechanical losses Stray losses TRUE ANSWER : ? YOUR ANSWER : ?
In a commutator Mica and copper are equally hard Mica is harder than copper None of the listed here Copper is harder than mica TRUE ANSWER : ? YOUR ANSWER : ?
In dc generator, the generated voltage depend upon Both speed and flux None of the listed here Flux only Speed only TRUE ANSWER : ? YOUR ANSWER : ?
The overall efficiency of a dc generator is maximum when its variable loss is equal to Iron loss Constant loss Mechanical loss Stray loss TRUE ANSWER : ? YOUR ANSWER : ?
For the same rating, a dc machine has_______ an ac machines. More weight than The same weight as Less weight than None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
In D.C. generators on no-load, the air gap flux distribution in space is Flat topped Sinusoidal Triangular Pulsating TRUE ANSWER : ? YOUR ANSWER : ?
A triplex wave winding will have parallel paths. 2 4 None of the listed here 6 TRUE ANSWER : ? YOUR ANSWER : ?
The efficiency of a dc generator means its Mechanical efficiency Overall efficiency None of the listed here Electrical efficiency TRUE ANSWER : ? YOUR ANSWER : ?