DC Motors For a D.C. shunt motor if the excitation is changed Torque, power and speed, all will change Torque will remain constant Torque will change but power will remain constant Torque and power both will change Torque, power and speed, all will change Torque will remain constant Torque will change but power will remain constant Torque and power both will change ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To reduce eddy current loss To support the field coils To spread out flux for better uniformity To reduce the reluctance of the magnetic path To reduce eddy current loss To support the field coils To spread out flux for better uniformity To reduce the reluctance of the magnetic path ANSWER DOWNLOAD EXAMIANS APP
DC Motors The variable resistor shunting the field of a dc series motor is called a Armature divertor Voltage regulator Potential divider Field divertor Armature divertor Voltage regulator Potential divider Field divertor ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking Regenerative Dynamic braking None of these Plugging Regenerative Dynamic braking None of these Plugging ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens This will make armature to take heavy current, possibly burning it Nothing will happen to motor This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Motor will come to stop This will make armature to take heavy current, possibly burning it Nothing will happen to motor This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Motor will come to stop ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Swinburne's test Hopkinson's test Field's test Brake test Swinburne's test Hopkinson's test Field's test Brake test ANSWER DOWNLOAD EXAMIANS APP
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