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4 RICHARDSON'S DLUEBOOK OF PROJECTION
69. How is 2-phase current secured?
70. How is two-phase current transmitted?
71. Does 3-phase form an ideal current from the viewpoint of
distribution ?
Electrical Terms and Their Meaning, page 21
72. What is polarity?
73. How many times per second is each wire positive and nega
tive when charged with 60 cycle a.c. ? — v?^>
74. What is voltage? What does it represent?
75. Will wires attached to a power source have its voltage or
pressure at all points of their length?
76. A wire attached to positive of one battery cell and negative
of another would represent what kind of a connection ? \3j^ What would be its result in voltage and amperage?
77. Explain series and parallel (multiple) connections and their
effect, susuuss s* *~^**A Tmn
78. What does the term "ampere" mean? What does an ampere
represent ? ' ■ s\ ■ • ^ ,vw^ t
79. Explain the manner in which work is performed by electric
current.
80. What effect has added voltage (pressure) on amount of
work current performs?
81. What is the difference between 10 amperes at 50 volts and
10 amperes at 100 volts?
82. What does a watt represent?^ i
83. What function does an ampere perform ?^v-o^
84. What is consumed in the production of power?
85. How is the horse power of work performed by an electric
current calculated?
86. How many watts in one H.P. (horsepower) ? ; .-. .;_
The Ohm, page 25
87. Why does water encounter resistance when flowing through
a pipe ? . w^Avo >
88. Explain the difference between a good conductor and a poor
one. } -i.^Jy
89. What is the effect of resistance?
90. What becomes of the power used in overcoming resistance?