DC Motors For constant torque drive which speed control method is preferred? Mechanical loading system Field control Armature voltage control Shunt armature control Mechanical loading system Field control Armature voltage control Shunt armature control ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? Rheostat braking None of these Regenerative braking Plugging Rheostat braking None of these Regenerative braking Plugging ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? C. shunt motor C. series motor Induction motor Reluctance motor C. shunt motor C. series motor Induction motor Reluctance motor 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 Less than 50% Around 90% 1 Anywhere between 75% and 90% Less than 50% Around 90% 1 Anywhere between 75% and 90% 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 None of these Dynamic braking Plugging Regenerative None of these Dynamic braking Plugging Regenerative ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following law can be used to determine the direction of rotation of dc motor? Fleming's left hand rule Faraday's law Lenz's law Coloumb's law Fleming's left hand rule Faraday's law Lenz's law Coloumb's law ANSWER DOWNLOAD EXAMIANS APP
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