We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
Name two reasons why most motor-generator sets have an a.c. motor...
Why is a d.c. motor-generator installation inadvisable where d.c. at 110 volts is available from power lines?
CURRENT RECTIF1CATIOX 271
77. What is a shunt ?
78. What is a shunt wound field ?
79. Describe a shunt motor, a ■.
» 80. Describe a squirrel cage winding. +W~«*«
■* 81. What is meant by a shunt wound dynamo?
82. What is a synchronous motor? 9 • ,
^ S3. What is a synchronous polyphase motor ?^
84. What is an undercut?
85. What is the current producing element of a motorgenerator set?
86.
87.
d
88. What double purpose does the motor generator set serve?
89. What efficiency should a good motor-generator set have?1'
90. How should the motor and generator be mounted ?
91. What two types of generator are generally employed ?
92. What are the facts of the development of the generator in motion picture work?
93. Why is the once popular series type generator no longer employed ?
94. What is meant by ballast resistance?-^ • . . v .<^&tl"
95. Name the conditions that exist when parallel type gent erators are used. lV> y.S".
96. What must ballast resistance do without over-heatingTj
97. What are the limitations of ballast resistance capacity??
To Parallel CompoundWound Generator, page 306
98. Why is it necessary to use an "equalizer" between two compound-wound generators ?
99. What is an equalizer ? . _ ^w . .* 100. If one cold compound generator is cut into the circuit of
another already in operation, what happens ?
;
Alignment of Mom and Generator, page 307
101. Must the motor and generator be very carefully aligned?
102. How can the alignment of shafts be tested ?