A) 1 : 3 B) 1 : 2 C) 3 : 1 D) 2 : 1. Ans : (A)
A) line leads B) armature connections C) series field connections D) shunt field connections. Ans : (B)
A) winding B) commutator C) size of conductor D) yoke. Ans : (B)
A) less turns and a smaller cross-section of wire B) more turns and a large cross-section of wire C) less turns and a large cross-section of wire D) more turns and a smaller cross-section of wire. Ans : (D)
A) Produce unidirectional torque B) Produce unidirectional current in the armature C) Help in changing the direction of rotation of the armature D) Reduce sparking. Ans : (A)
A) shunt field B) series field C) armature D) any of the above. Ans : (C)
A) Hopkinson’s test B) Brake test C) Field’s test D) All of the above. Ans : (B)
A) separately excited generator B) series generator C) differentially compound generator D) cumulatively compound generator. Ans : (A)
A) mechanical losses of both machines equal B) total losses of both machines equal C) copper losses of both machines equal D) make iron losses of both machines equal. Ans : (D)
A) Core loss B) Friction and windage loss C) Brush contact loss D) None of the above. Ans : (D)