The single most important variable in soil compaction is the _____.


a. moisture content
b. type of soil
c. compacting equipment
d. compaction method


a. moisture content

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The coefficient of performance of the refrigeration cycle when operating as an air-conditioner is nearest:

A 5-ton ideal air-conditioner operates between 120 kPa and 800 kPa. The refrigerant is R134a.

A) 3.6
B) 3.9
C) 4.2
D) 4.6

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A "dedicated" geothermal well is part of a(n) ____________________ system.

Fill in the blank(s) with the appropriate word(s).

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The green revolution began with research in which two nations?

a. China and Japan c. Mexico and India b. United States and France d. South Korea and Pakistan

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What is one of the newest technologies to emerge from the research and development of the 42-volt system?

What will be an ideal response?

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