A strut is made up by rigidly joining two 140 mm x 60 mm x 16.2 kg/m taper flange channels rigidly joined to form a rectangular tube section, 6 m long. The strut may buckle due to an axial
compressive load. The pin-fixed end supports may be assumed for buckling about the stronger
axis but fixed-fixed end supports may ​

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.