- 
DIRECT-CURRENT DYNAMOS AND MOTORS. 
116. 
117. 
118. 
119. 
120. 
121. 
122. 
1253. 
How is the final number of wires per layer in a smooth- 
core armature found? 
How is the arrangement of armature inductors adjusted, 
when the final number of wires per layer referred to in 
the preceding question is found about half-way between 
two whole numbers? : 
How can a given winding space be utilized to the best ad- 
vantage, electrically? 
Give average number of slots for toothed armatures of vae 
rious diameters. 
By means of formula 16, find the approximate number 
of No. 12 B. & S. wires that can be wound upon a 
smooth drum armature 44 inches in diameter, and 
verify result by use of Table 13, Instruction Book. 
How many No. 9 B. & 8S. wires can be placed on a 
smooth ring armature having an external diameter of 
30 inches? Use both formula (16) and Table 13. 
Determine the number of No. 5 B. & 8. wires which may ~ 
be put on a 60-inch smooth ring armature. 
Compute the approximate number of No. 7 B. & S. wires 
on a 32 inch toothed armature, using formula (17), In- 
struction Book. 
Check the result obtained in answer to the preceding ques- 
tion by means of the data given in Table 13. 
Check the answer to Question 118 by means of Tables 
14 and 15. 
State the fundamental relation between the rate of cutting 
magnetic lines and the voltage generated. 
What is the voltage generated per foot of armature in- 
ductor under unit conditions? 
What are termed the idle conductors on an armature, and 
what percentage does their number usually bear to the 
total number of conductors? 
