How much water is contained in an inch of rainfall on an area one acre in size?
What will be an ideal response?
That volume of water is referred to as an acre inch. An acre inch of water equals 3,630 cubic feet of water or just
over 27,152 gallons.
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Nitrates cause plant life in streams and lakes to flourish
Indicate whether the statement is true or false.
The shaft seal on an open compressor is more complicated than the gaskets and seals on other parts of the compressor because:
A) It must seal against a higher pressure. B) It must seal a shaft that is turning. C) It must seal in a vacuum. D) It is subjected to both refrigerant and oil while other seals and gaskets are not.
__________ controls are desirable for efficient system operation.
A. Dual-pressure B. Electronic C. High-pressure D. Low-pressure
Give an overview of four-step switching.
What will be an ideal response?