A. along neutral axis
B. along field axis
C. in any of the above positions
D. in none of the above positions
A. abrasion from dust
B. excessive spring pressure
C. rough commutator bars
D. high mica insulation between com-mutation bars
E. all of the above factors
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
A. Series generator
B. Shunt generator
C. Over compound generator
D. Flat compound generator
A. cumulatively compounded long shunt
B. deferentially compounded long shunt
C. cumulatively compounded short shunt
D. differentially compounded short shunt
A. 2 : 3
B. 3 : 1
C. 3 : 2
D. 1 : 3
A. graphite
B. paper
C. mica
D. insulating varnish