The speed of an AC servo motor is controlled by the __________.
A. frequency of the AC supply
B. amplitude of the signal supplied to the main winding
C. amplitude of the signal supplied to the auxiliary winding
Answer: C
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Which 12V lead acid battery would likely have the highest internal resistance?
A. A fully-charged battery at 32°F (0°C) B. A battery with an open circuit voltage measurement of 12.6V C. A battery that has electrolyte with a specific gravity of 1 D. A fully-charged battery at 72°F (22°C)
All vitamins contain _____
a. sodium c. nitrogen b. carbon d. all answers are correct
In response to stock market crashes, what type of mechanisms evolved to temper risk in the eighteenth century?
a. limited liability companies b. national banks c. insurance firms d. chartered companies
Which of the following is a non-infectious disease?
A. Bloat B. Mineral deficiency C. Plant poisoning D. All of these