How does an economizer reduce HVAC operating costs?
a. It reduces compressor speed.
b. It uses cool outdoor air for cooling.
c. It uses a variable-speed blower motor.
d. It runs during off-peak energy use hours.
b
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____ finishes may be made of brick, concrete block, or stone.
A. Masonry B. Stonework C. Layered D. Pitched
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Rootstocks can be used to enable plants to tolerate poorly drained soils
Indicate whether the statement is true or false
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A crystal might also vibrate at a frequency that’s a multiple of its fundamental frequency, which is called a ____ frequency, or overtone.
a. harmonic b. secondary c. primary d. serial
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OSHA standards require that when using a four-leg hitch you must size each leg as if it were a three-leg hitch
A. True B. False
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