A. Shunt generators
B. Series generators
C. Compound generators
D. None of the above
A. Self-excited generator
B. Separately excited generator
C. Level compounded generator
D. All of the above
Which of the following generating machine will offer constant voltage on all loads? Read More »
D.C. Generators A. reverse the field connections
B. increase the field resistance
C. increase the speed of primemover
D. check armature insulation resistance
A. their rising voltage characteristics
B. unequal number of turns in their series field windings
C. unequal speed regulation of their primemovers
D. unequal series field resistances
A. to increase the speed and hence generated e.m.f.
B. to increase the series flux
C. so that two similar machines will pass approximately equal currents to the load
D. to reduce the combined effect of ar-mature reaction of both machines
A. rising voltage characteristics
B. identical voltage characteristics
C. droog voltage characteristics
D. linear voltage characteristics
A. 40 percent
B. 25 percent
C. 10 percent
D. 5 percent
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