1. A cylindrical work bar with 15 mm in diameter and 150 mm length is chucked in an engine lathe and supported at the opposite end using a live center. A 125 mm portion of the length is to be turned to a diameter of 14 mm one pass at a speed of 150 m/min. The metal removal rate should be 125 cm3/min. Determine (a) the required depth of cut, (b) the required feed, and (c) the cutting time.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?