DC Motors Excessive sparking at brushes may be caused due to Dirt on the commutator Worn bearings Loose coupling Misaligment of machine Dirt on the commutator Worn bearings Loose coupling Misaligment of machine ANSWER DOWNLOAD EXAMIANS APP
DC Motors During rheostat braking of dc series motor Motor is run at reduced speed None of the listed here Motor is run as a generator Motor is reversed in direction Motor is run at reduced speed None of the listed here Motor is run as a generator Motor is reversed in direction ANSWER DOWNLOAD EXAMIANS APP
DC Motors For constant torque drive which speed control method is preferred? Mechanical loading system Shunt armature control Armature voltage control Field control Mechanical loading system Shunt armature control Armature voltage control Field control ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? Windage loss Field copper loss Armature copper loss None of these Windage loss Field copper loss Armature copper loss None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors A direct on line starter is used for starting motors Upto 10 HP Upto 5 HP Upto 20 HP Upto 15 HP Upto 10 HP Upto 5 HP Upto 20 HP Upto 15 HP ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. shunt motors as load is reduced The speed will remain almost/constant The speed will increase in proportion to reduction in load The speed will reduce The speed will increase abruptly The speed will remain almost/constant The speed will increase in proportion to reduction in load The speed will reduce The speed will increase abruptly ANSWER DOWNLOAD EXAMIANS APP
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