Briefly describe the simplest heat treatment procedure that would be used in converting a 0.76 wt% c steel from one microstructure to the other, as follows: (a)spheroidite to tempered martensite (b)tempered martensite to pearlite (c)bainite to martensite (d)martensite to pearlite (e)pearlite to tempered martensite (f) tempered martensite to pearlite (g)bainite to tempered martensite (h)tempered martensite to spheroidit

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.

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]