Describe the grounding connections in a lightning protection system.
What will be an ideal response?
The grounds are usually copper-clad steel rods at least 10 feet long and 1/2 inch in diameter. However, where the topsoil is very shallow, groundplates may be used. In general, grounding connections should be:
| ? | made with rods driven into the earth, at least 2 ft (600 mm) from the protected object so that the rod top is 1 ft (300 mm) under grade; |
| ? | made to underground metal water pipes or well casings; and |
| ? | interconnected with driven ground electrodes for the electric or telephone system. |
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A certain sport utility vehicle is equipped with 17” rims (which correspond to a tire diameter of 25.7”). The vehicle is later upgraded to the 19” rims (which correspond to a tire diameter of 28.2”). If the onboard computer is not reset for the new tires, the odometer will not be accurate. When the odometer indicates that you have driven 1000 miles on the new tires, how many miles have you actually driven? (Round your answer to the nearest mile.)
What will be an ideal response?
Soil colloids are too small to be seen with an ordinary light microscope
Indicate whether the statement is true or false
Sites with 25% or less of the property boundary adjacent to existing development are considered ____ developments.
A. edge B. Greenfield C. Bluefield D. bordered
What is the break-even chart?
What will be an ideal response?