As a rule of thumb, for linear expansion of pipe per 100°F, assume _____ inch(es) per 100 feet.
a. 3/4
b. 2
c. 3
d. 4
a. 3/4
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Define hollow ground
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Microsurfacing is part of a pavement restoration and maintenance program that seals the surface of a street that has minor cracking to prevent water from penetrating into the base material. The annual cost of the equipment (truck, tank, valves, etc.) is $109,000 per year and the material cost is $2.75 per square yard. Alternatively, regular street resurfacing requires equipment that has a first cost of $225,000 with a 15-year life and no salvage value. The variable cost for regular resurfacing is $13 per square yard. At an interest rate of 8% per year, how many square yards per year must be resurfaced for the two methods to break even?
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Why should you apply water to plants in pots with drainage holes until it comes out the bottom?
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What does hygroscopic mean?
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