DC Motors D.C. series motors are used Where constant operating speed is needed Where load changes frequently Where load is constant None of these Where constant operating speed is needed Where load changes frequently Where load is constant None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Anywhere between 75% and 90% 1 Around 90% Less than 50% Anywhere between 75% and 90% 1 Around 90% Less than 50% ANSWER DOWNLOAD EXAMIANS APP
DC Motors A direct on line starter is used for starting motors Upto 20 HP Upto 5 HP Upto 15 HP Upto 10 HP Upto 20 HP Upto 5 HP Upto 15 HP Upto 10 HP ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity? Field test Brake test Swinburne's test Hopkinson's test Field test Brake test Swinburne's test Hopkinson's test ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine None of the listed here To control the speed of machine To reduce armature reaction To improve commutation None of the listed here To control the speed of machine To reduce armature reaction To improve commutation ANSWER DOWNLOAD EXAMIANS APP
DC Motors The dirction of rotation of a dc series motor can be changed by Interchanging field terminals Either of Interchanging field or Interchanging supply None of the listed here Interchanging supply terminals Interchanging field terminals Either of Interchanging field or Interchanging supply None of the listed here Interchanging supply terminals ANSWER DOWNLOAD EXAMIANS APP
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