A 13-tooth spur pinion has a module of 5 mm and runs at a speed of 1250 rev/min. The driven gear has 25 teeth. Find the speed of the driven gear, the circular pitch, and the theoretical center-to-center distance.

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