A) control the flux B) limit the armature current C) demagnetize the magnetic field partially D) increases the armature resistance. Ans : (A)
A) series with the armature B) parallel with the armature C) series with the field D) parallel with the field. Ans : (A)
A) to reduce armature resistance B) to increase field resistance C) to limit the starting voltage D) to limit the starting current. Ans : (D)
A) Eddy current losses B) Friction losses C) Stray losses D) Copper losses. Ans : (C)
A) Swinburne test B) Hopkinson test C) Leonard test D) Block rotor test. Ans : (A)
A) the fuse will blow off B) the motor will not start C) the motor will start with jerk D) the motor will run with vibrations and noise. Ans : (B)
A) series with the armature B) parallel across the armature C) parallel across the field winding D) series with the field winding. Ans : (A)
A) dc generators B) dc motors C) both dc motors as well as dc generators D) neither dc motors nor dc generators. Ans : (B)
A) dc motors B) dc generators C) both dc generators as well as dc motors D) none of the above. Ans : (A)
A) 111 N-m B) 248 N-m C) 156 N-m D) 396 N-m. Ans : (D)