DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? Windage loss Armature copper loss None of these Field copper loss Windage loss Armature copper loss None of these Field copper loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Hopkinson's test Swinburne's test Field's test Brake test Hopkinson's test Swinburne's test Field's test Brake test ANSWER DOWNLOAD EXAMIANS APP
DC Motors Usually wide and sensitive speed control is desired in case of Colliery winders Centrifugal pumps Steel rolling mills Elevators Colliery winders Centrifugal pumps Steel rolling mills Elevators ANSWER DOWNLOAD EXAMIANS APP
DC Motors In variable speed motor None of these A stronger commutating field is needed at low speed than at high speed A weaker commutating field is needed at low speed than at high speed Same commutating field is needed at low speed than at high speed None of these A stronger commutating field is needed at low speed than at high speed A weaker commutating field is needed at low speed than at high speed Same commutating field is needed at low speed than at high speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ? Differentially compound motor Series motor Shunt motor Cumulative compound motor Differentially compound motor Series motor Shunt motor Cumulative compound motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The rheostatic speed control method is very Economical Unsuitable for rapidly changing loads Suitable for getting speeds above the normal Efficient Economical Unsuitable for rapidly changing loads Suitable for getting speeds above the normal Efficient ANSWER DOWNLOAD EXAMIANS APP
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