Electrical Machines The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be 625 W 700 W 650 W 600 W 625 W 700 W 650 W 600 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to overheating of winding. uneven air gap. poor lubrication. overload. overheating of winding. uneven air gap. poor lubrication. overload. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of IM the torque is inversely proportional to √slip. inversely proportional to slip. directly proportional to slip2. directly proportional to slip. inversely proportional to √slip. inversely proportional to slip. directly proportional to slip2. directly proportional to slip. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following type of brush and their application is/are correct copper graphite → low voltage high current density electro graphite → large ratings carbon brush → normal ratings All of these copper graphite → low voltage high current density electro graphite → large ratings carbon brush → normal ratings All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A? 11% 41% 21% 10% 11% 41% 21% 10% ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS