A) 1.5 V B) 15.6 V C) 32.2 V D) 64 V. Ans : (B)
A) DC shunt motor B) DC series motor C) DC differential compound wound motor D) DC cumulative compound would motor. Ans : (D)
A) small horse power motors B) open frame type motors C) variable speed motors D) high speed motors. Ans : (A)
A) R1 is minimum and R2 is maximum B) R1 is maximum and R2 is minimum C) R1 and R2 both are minimum D) R1 and R2 both are maximum. Ans : (A)
A) variable power drive B) variable torque drive C) constant torque drive D) constant power drive. Ans : (C)
A) armature copper losses B) friction and windage losses C) iron losses in core D) all of the above. Ans : (D)
A) mechanical losses vary directly as the rotor speed B) decreases in flux due to increases in shunt resistance by heating is negligible C) windage losses remain constant at a particular speed D) all of the above. Ans : (B)
A) 10 A B) 20 A C) 80 A D) 160 A. Ans : (C)
A) zero B) less than 480 rpm C) 480 rpm D) more than 480 rpm. Ans : (B)
A) no load B) low load C) part load D) full load. Ans : (D)