The large diameter pipes that transport sewage to the treatment plant are called
A. trunk lines
B. lateral lines
C. local mains
D. interceptors
Answer: D
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The benefits of electric baseboard heating are that ____.
A. each room can be controlled individually B. they are inexpensive to install C. they operate on a 24-V power supply D. Both a and b.
Competitive livestock judging began with an organization now known as the ____________________.
Fill in the blank(s) with the appropriate word(s).
An electric company must decide between two options for managing the blowdown water from its cooling tower. Option 1 is to continue the lease on 50 acres of land for another 5-year period and dispose of the water by spray irrigation. The landowner will move the pipe around as necessary and maintain the spray nozzles and valves. The previous lease cost $125,000 per year with payments due midway through each year. Now the landowner will require beginning of year payments of $180,000 each year. Option 2, which releases the 50 acre tract of land, involves purchasing a treatment system that will allow the recycling of most of the blowdown water. This system will have an initial cost of $1,600,000 and an AOC of $58,000 per year. However, the company will save $220,000 per year
because it will not have to purchase as much make-up water as with option 1. At the end of 5 years, the company will be able to sell the equipment back to the local equipment supplier for 30% of the first cost. If the electric company uses a MARR of 15% per year, should it continue to lease (defender) or purchase the treatment system (challenger)? What will be an ideal response?
Open loop water source systems normally draw the water from
A) a nearby lake or pond B) city water C) a shallow well D) a deep well