Match the type of solar energy collector with its description.
A. Low temperature
B. Medium temperature
C. Concentrators
A. flat panels that have unglazed glass fronts and are designed to heat water up to 110°F; generally used in swimming pools.
B. flat panels, but they have glazed glass and coatings that absorb higher amounts of solar energy, which enables them to heat water to between 120°F and 180°F; usually used for space heating and domestic hot water systems.
C. focus the sun's energy and provide water at temperatures above 250°F.
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The main purpose of a ground fault circuit interrupter (GFCI) is to ____.
a. determine the interrupting capacity b. calculate the available current c. protect a person from electrical shock d. gauge the ambient temperature
In many years, off-farm income at the national level is ________ than net farm income.
Fill in the blank(s) with the appropriate word(s).
Of the four phases listed below, which one is only performed on an "as-needed" basis?
A) Prestart check B) Routine maintenance C) Operation check D) Troubleshooting
The end of the box-end wrench is closed rather than open, for better holding power.
Answer the following statement true (T) or false (F)