The United States changed to standard time zones when

A. Congress passed a law establishing this system.
B. the major rail lines decreed common fixed times so that they could keep schedules and avoid wrecks.
C. factories demanded standard time schedules.
D. long-distance telephones required standard time coordination.
E. All of these choices are correct.


Answer: B

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Piles. Because piles are driven into ground, they are slender members. Therefore, the load-bearing capacity of an individual pile is small. A (concrete) pile cap integrates multiple piles into one foundation element.In placing concrete into the drilled hole for a pier, special equipment is used. What is that equipment and what function does it serve?

What will be an ideal response?

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To create proper scale in floral design, flowers used when designing toward the focal point should be _____

A) bud stage B) medium bud stage C) full bloom D) none of the above

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According to ASME, the key to effective communication on electrical drawings is the use of standardized symbols so that anyone who uses the diagram makes the same interpretation.

Answer the following statement true (T) or false (F)

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The maximum installed length of a flexible air connector is

A) 14 feet B) 25 feet C) 10 feet D) Unlimited

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