A slab-milling operation is carried out on a high-strength steel block that has a specific energy of 1.3 hp*min/in3, a length of 20 in, and a width of 6 in, at a feed of 0.01 in/tooth and a depth of cut of 0.15 in. The cutter rotates at 150 rpm and has a diameter of 3 in with 8 straight cutting teeth. Calculate the material removal rate and the cutting time, and estimate the power required.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

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?