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This is EIT question, PM General. I found this in NCEES online exam

Question goes like this. Air is flowing through a horizontal duct with a cross sectional area of 0.5m2 at a location along the length of the duct. Cp=1000J/Kg.K R=287J/KgK K=1.4 If the air is slowed down adiabatically and reversibily from 150m/s and 300 K to 50m/s . How to calculate the...

If a austenitized bar of AISI 1060 with ASTM 2 -grain size quenched in agitated oil , how can we calculate the surface and center hardness ( assume tha bar diameter as 100mm) I have no idea of how to do this type of quetion, Please some one help me, I could not find any study materal...