A. same kW rating
B. the same operation r.p.m.
C. the same droog voltage characteristics
D. same percentage regulation
A. to increase the series flux
B. to increase the generated e.m.f.
C. to reduce the combined effect of ar-mature reaction of both the machines
D. so that the two identical machines will pass approximately equal cur¬rents to the load
When two D.C. generators are running in parallel an equilizer bar is used______________? Read More »
D.C. Generators A. The direction of that generator is reversed
B. The speed of that generator is increased
C. The field of that generator is weakened
D. That generator takes large of loads
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
