You are an engineering technologist employed by the AOL Corporation. Due to a shipping accident 200 bars each of AISI 1020 and AISI 1040 hot-rolled carbon steel have become mixed during shipment to the organization’s warehouse and manufacturing facility in Alaska. It is essential that the bars be correctly identified. You have been selected by your engineering manager to travel to Alaska to sort the material so that manufacturing can begin producing customer product. The only equipment available at the warehouse that can be used to identify the material is a 60,000 pound tensile tester, a Brinell hardness tester, and the equipment in a small machine shop including a band saw, engine lathe, surface grinder, and other small tools.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

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