Too much traffic on lawns causes _____________ of the soil

A) aeration
B) compaction
C) drainage
D) an infestation


B

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One welded steel tank holds 350 gallons. Another holds twice as much. What is the average amount held by the tanks, in gallons?

What will be an ideal response?

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The only advantage to grooving a lap joint is ____.

A. to give additional clearance B. to strengthen the weld C. to increase penetration D. to improve the design

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What is the purpose of the heat exchanger?

A) To separate the combustion gas from the circulating air while transferring heat from the combustion gas to the circulating air B) To exchange the combustion gas for the circulating in order to transfer heat into the house C) To mix the combustion gas and the circulating to transfer heat from the combustion gas to the house D) To separate the combustion gas from the circulating air while transferring heat from the circulating air to the combustion gas

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This seal is used most frequently in bearings

A. stuffing box B. lip seal C. mechanical seal D. labyrinth seal

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