In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75â°c as it moves at 0.19 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter. a uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the tube. if the tube is 10 m long, what is the required heat flux? if fluid enters the tube with a fully developed velocity profile and a uniform temperature profile, what is the surface temperature at the tube exit? fluid properties may be approximated as 1000 kg/m3, 4000 j/kgâ·k, 2 ã 10-3 kg/sâ·m, 0.8 w/mâ·k, and 10.

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?

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms