Tests are performed to determine the Tool Life of a high-speed steel single-edge cutting tool. At cutting speeds (v) of 180 m/min and 110 m/min the corresponding tool life is 4.25 min and 35 min., respectively. Except for the cutting speed, the cutting conditions in both tests are the same. Calculate the value of n in the Taylor Tool Life Equation. Answers are rounded to three (3) decimal places (x. xxx).

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false