Which of the following statements is true of the process for forming a footing. The median measurement between high and low points becomes the grade for the footing.
The upside forms are set up first.
The inside forms are set up first.
The high point becomes the grade for the footing.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0