A. field
B. brushes
C. armature
D. load
The critical resistance of the D.C. generator is the resistance of_____________? Read More »
D.C. Generators A. external current
B. armature current
C. shunt current
D. load current
The series field of a short-shunt D.C. generator is excited by_______________? Read More »
D.C. Generators A. is always present
B. is always absent
C. may be sometimes present
D. none of the above
In a separately excited generator supplying rated load the armature reaction. Read More »
D.C. Generators A. slots
B. armature conductors
C. winding elements
D. poles
A. any even number of conductors
B. any odd number of conductors
C. that even number which is exact multiple of poles + 2
D. that even number which is exact multiple of poles
Wave winding is composed of_______________? Read More »
D.C. Generators A. 2
B. 4
C. 6
D. 8
A. external resistance = internal char-acteristic – armature reaction
B. internal characteristic = magnetisation characteristic – ohmic drop
C. external characteristic = magnetisation characteristic – ohmic drop – armature reaction
D. magnetisation characteristic = external characteristic
In a D.C. generator:___________________? Read More »
D.C. Generators A. increasing its field resistance
B. decreasing its field resistance
C. increasing its speed
D. decreasing its speed
In a D.C. generator the critical resistance can be increased by_____________? Read More »
D.C. Generators A. Series generator
B. Shunt generator
C. Over compound generator
D. Flat compound generator
Which generator would you prefer for feeding long D.C. transmission lines ? Read More »
D.C. Generators A. Series field
B. Compensating field
C. Inter pole field
D. Shunt field
