Which of the following statements about battery ratings is true?
A. The ampere-hour rating is defined as the amount of steady current that a fully charged battery can supply for 1 hour at 80ºF (26.7ºC) without the cell voltage falling bellow a predetermined voltage.
B. The cold cranking amperage rating represents the number of amps that a fully charged battery can deliver at 0ºF (-17.7ºC) for 30 seconds while maintaining a voltage above 9.6 volts for a 12 volt battery.
C. The cranking amperage rating expresses the number of amperes a battery can deliver at 32ºF (0ºC) for 30 seconds and maintain at least 1.2 volts per cell.
D. The reserve capacity rating expresses the number of amperes a fully charged battery at 80ºF can supply before the battery's voltage falls below 10.5 volts.
Answer: C
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The force F goes through the origin of the xy-coordinate system and makes an angle ???? with the horizontal, as shown in Figure 12.25. Points A and B are at the coordinates indicated on the figure in units of feet. Calculate the moment of F about points A and B, assigning positive values to counterclockwise moments.
F = 21.3(10)² lbf
???? = 90°
 FIGURE 1.png)
Which of the following measurement(s) demonstrated the growing inequality in America from the mid-1960s to 2012?
A. Some 46.5 million Americans or 15 percent of all Americas remained mired in poverty in 2012, and the poverty rate among Hispanics and African Americans was even higher in 2012. B. The top five percent of income earners saw their share of the national income grow from about 15 percent in 1968 to approximately 22 percent in 2012. C. The top one percent saw their share of national income increase from about eight percent to approximately 19 percent in 2012. D. The income earned by chief executives was 20 times as much as the average worker in their corporations; in 2012, they earned 273 times as much as the average company worker. E. All of these choices are correct.
Most fuel filters are designed to remove particles larger than ________
A) 10 to 20 microns B) 1 micron C) 100 microns D) 70 microns
When changing a low voltage transformer, service technician should:
A) Use a replacement transformer with a higher VA rating to make it last longer. B) Temporarily short across the secondary side of the transformer to test its output. C) Use a replacement transformer with a higher voltage primary winding to make it last longer. D) Check all low voltage controls for shorts and grounds.