What precautions should be taken if direct burial cable is used?
What will be an ideal response?
If direct burial cable is used, care must be taken to protect the cable from damage. For example, the cable can be installed in the ground to a greater depth than that at which normal digging takes place. Added protection is obtained by placing a treated board over the cable to provide a shield against digging and probing near the cable. The cable should also be surrounded by a layer of sand to prevent any abrasion of the cable by sharp stones and other objects in the soil.
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The standard spacings of framing members in wood light-frame construction (such as studs, floor joists, and rafters) are 12 in., 16 in., or 24 in. What is the rationale behind these spacings?
What will be an ideal response?
What two functions does the evaporator of a domestic refrigerator perform?
A. Filters and cools the air. B. Absorbs and dissipates heat. C. Humidifies and cools the air. D. Dehumidifies and cools the air.
The resistance of an AC magnetic device will have ________ resistance than Ohm's law predicts
A) a much lower B) the same C) a much higher
The term __________ is used to describe voltage levels between 50 Volts and 600 Volts.
A. average voltage B. high voltage C. line voltage D. low voltage