Define specific gravity.
What will be an ideal response?
the ratio of the density of a cubic foot of a material as compared to a cubic foot of water in liquid form
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Site dimensions are usually stated in ____.
A. whole inches B. tenths or hundredths of feet C. feet and inches D. meters
Why does an air-source heat pump system's heating capacity decrease as the outdoor temperature decreases?
A) The compression ratio decreases because the evaporator pressure increases. B) The compression ratio increases because the evaporator pressure decreases. C) The compression ratio increases because the evaporator pressure increases. D) The compression ratio decreases because the evaporator pressure decreases.
After disconnecting equipment to be serviced, it must be ___________________.
A. locked out B. tagged out C. labeled D. a and b
A professional driver should expect a train to come through a highway-rail grade crossing _____.
Fill in the blank(s) with the appropriate word(s).