1. In squirrel cage induction motor,rotor has—–winding a) field b) armature c)no d)none of these Ans:c 2. In squirrel cage induction motor,stator has—–winding a) single phase field b) 2 phase armature c)no d) 3 phase winding Ans:d 3. In slip ring induction motor,stator has—–winding a) single phase field b) 2 phase armature c)no d) 3 phase winding Ans:d 4. In slip ring induction motor,rotor has—–winding a) single phase field b) 2 phase armature c)no d) 3 phase winding Ans:d 5. In squirrel cage induction motor,stator is—–part a) rotating b) stationary c)dynamic d) none of these Ans:b 6. In squirrel cage induction motor, rotor is —–part a) rotating b) stationary c)either (a)&(b) d) none of these Ans:a 7.The function of centrifugal switch in single phase induction motor a) to disconnect starting winding after 75%speed b) to connect starting winding after 75%speed c) to disconnect starting winding below 75%speed d) to disconnect starting winding after 50%speed Ans:a 8.Staring torque is proportional to a) power factor b) speed c) slip d) none of these Ans:a 9.In domestic applications which motor is used a) single phase IM b) 3phase IM c) D.C motor d) none of these Ans:a 10. In 3 phase squirrel cage IM ,rotor should be —–circuited a) open b)short c)open or short d)none of these Ans:b 11.When 3 phase supply is given to stator winding,—–magnetic field is produced a) rotating b) crossing c) both (a)&(b) d)none of these Ans:a 12.The rotor speed never equals to a) Relative speed b) running speed c) Synchronous speed d) None of these Ans: c 13.Rotor conductors are short circuited by means of a) iron bars b)copper bars c)Aluminium bars d)end rings Ans:d 14.In 3 phase IM,stator conductors are connected in a)series b)parallel c)series or parallel d)none of these Ans:a 15.In transformer,Emf is—-to the no of turns a) linear b) inversely proportional c) not proportional d) proportional Ans:d 16. Transformer ratio is defined as a)E2/E1 b)E1/E2 c)E1.E2 d)none of these Ans:a 17..In transformer,core is made up of a)silicon steel b)aluminum c)copper d)none of these Ans:a 18.Transformer works on the principle of a)Electro magnetic induction b)Gauss law c)ohms law d)none of these Ans:a 19.In transformer, primary and secondary conductors are coupled by a)Electrically b)mechanically c)magnetically d)none of these Ans:c 20..Main function of starter is a)to control temperature b) to control starting current c) to disconnect load d)none of these Ans:b 21. Voltage control of D.C motor is a)flux control b)armature control c)ward Leonard control d)none of these Ans:c 22.Armature control method is a)flux control b)armature resistance control c)ward Leonard control d)none of these Ans:b 23. Flux control method is a)field control b)armature control c)ward Leonard control d)none of these Ans:a 24 Speed above rated speed which control is preferred a)flux control b)armature control c)ward Leonard control d)none of these Ans:a