2)a)(10%) Define the following terms: Phase, Microstructure, Solid solution, Metal forming, Annealing. b)(10%) 1060 steel heated to ? region slowly cool to just above eutectoid temperature. What phases/structures are present? What is the expected hardness, BHN for the 1060 steel after (OQ, AC and WQ)?

a)(5%) Briefly explain the difference between hardness and hardenability.b)(5%) What is the main difference between eutectic, eutectoid and peritectic reactions? c)(10%) A cylindrical piece of 5140 steel heated to γ region and OQ. If the hardness at the surface must be ≥ 35HRC, what is the maximum allowable dia.? Explain.

A single-effect evaporator generates a distillate product at a flow rate of 2 kg/s. The system operating temperatures are as follows: • The boiling temperature, Tb is 90 ºC. • The feed temperature, Tf, is 85 ºC. • The steam temperature, Ts, is 100 ºC. • Boiling Point Elevation is neglected. • The Temperature of cooling Water, Tcw, is 25 ºC.

Determine the heat transfer areas in the evaporator and the condenser, the thermal performance ratio, the flow rates of feed seawater and reject brine, and the flow rate of cooling seawater.

Assume that the specific heat of seawater is constant and equal to 4.2 kJ/kg.ºC, and assume the over all heat transfer coefficeint for evapporater and condenser is 2 kW/m2 .ºC ,and assume the salinity of the feed is 42,000 ppm and rejected brine salinity is 84,000 ppm.

Question 3: Explain pressure. ( it is advised to look at the supplied materials and explain from them)

Supplied Materials:

-For static fluids, consider the force balance. Fluid statics.
is there. In the case of liquids, the change in pressure due to height is large, and it must be handled. Also, even when the container is in a relatively stationary state, for example, when the container is operating at high speed, it is possible to think of the motion of the fluid in the target system fixed to the container as if it were the stationary fluid.
  

3.1 Pressure p.22~

p expressed as p=P/A is called Pressure and P is called total pressure. When the pressure is not uniform, the pressure at one point is p=lim ΔA→0 (ΔP/ΔA)=dP/dA
Is displayed.

3.1.1 Unit of pressure p.22~
・In SI unit, the unit of pressure is often expressed as Pascal (Pa) or Bar (bar) or Water column meter (mH2O, mAq). Refer to Table 3.1 on page 23 of the textbook for pressure unit conversion. Of these, remember the following three in particular. 1Pa=1N/m2
1atm=101325Pa
1mHg=1/0.76atm
Pa is the basic unit of pressure, atm is 1 atm, and 1 mHg is used for conversion when measuring mercury column.

3.1.2 Absolute pressure and gauge pressure p.23~
・There are the following two methods to express the pressure. Be careful not to be confused.
(See Figure 3.1 in textbook p.23.) Absolute pressure: A method based on perfect vacuum. Gauge pressure: A method based on atmospheric pressure. (Gauge pressure) = (Absolute pressure)-(Atmospheric pressure) In other words, the gauge pressure indicates whether or not there is a pressure difference from atmospheric pressure. Therefore, the pressure measuring instrument usually shows gauge pressure, so it is necessary to consider the atmospheric pressure.

3.1.3 Properties of pressure p.23~
・Pressure has the following three properties. (1) The pressure of the fluid always acts vertically on the wall surface in contact with the fluid. (2) The pressure at one point in the stationary fluid is the same in both directions. (3) The pressure applied to the fluid in the closed container is transmitted to all parts with the same strength. Pascal principle: F2/A2 = F1/A1
∴ F2 = F1 × (A2/A1)

End of supplied materials. Thank you so much, and I hope you are able to deliver this. The explaination shouldnt be short but not too long either is thats not a bother

The vanes of a helicopter has an angular speed of 60r/min. There are three vanes with a length of 4.2 m and a width of 0.25m each. The air is at a temperature of 15ºC. Transition takes place at R_ecr = 3.2 e5 . Calculate the aerodynamic torque required to overcome skin friction.

Completely and thoroughly explain how an analysis of Process Variation was used by any company that makes any type of Soap Product

If you designed a Tennis ball collecting robot

Explain:

a) Which sensor(s) would you use. Why?

b) Which computing unit would you use? Why?

c) Which actuator would you use? Why?

d) Draw the block diagram of the system.

e) Draw the flow chart of the control software.

1. What is screw pump?

2. working principle of screw pump.

3. screw pump test rig

4. procedure

5. general use

6. identify its accuracy, precision and time respond in getting a reading.

7. the advantage and disadvantage of screw pump.

A pump operating at steady state receives 1.5 kg/s of liquid water at 50^oC, 1.5 MPa. The pressure of the water at the pump exit is 14 MPa. The magnitude of the work required by the pump is 25.2 kW. Stray heat transfer and changes in kinetic and potential energy are negligible.

Determine the work required by a reversible pump operating with the same conditions, in kW, and the isentropic pump efficiency.

Design a chain drive for a Centrifugal Pump to be driven by a Steam Turbine. The input speed will be 1100 RPM, and the desired output speed is 350 RPM. The conveyor requires 20.0 hp. What type of lubrication will be needed?

Inside a boiler with a volume of 0.5 m, there is wet steam with a half volume of water at 140 kPa pressure. As a result of giving heat at constant pressure, after half of the water is vaporized, heat is continued until the pressure in constant volume is 1 MPa. Then, after giving heat at constant pressure, according to the temperature is 400 ° C; Show the temperature, pressure, volume, internal energy, enthalpy and dryness levels in a table during state changes.

b) Show the state changes in P-v and T-v diagram.
c) Find the work and heat transition after the state changes.
d) Find the required amount of fuel (natural gas, coal, fuel oil) for the heat given after the state changes by making the necessary assumptions.

Exhaust gases having properties similar to dry air enter a thin-walled square duct exhaust stack at 500 ºC. The stack is made of galvanized iron and is 20 m tall and 0.25 m side. If the gas flow rate is 0.5 kg/s and the stack surface has the outside ambient temperature of 10 ºC estimate:

a) the outlet temperature of the exhaust gas

b) the heat transfer coefficient

c) the rate of heat transfer

d) the pressure drop

A gas turbine air- standard cycle operates between a low pressure of 14.7 Psia and a high pressure of 60 Psia. The temperature of the gas at the inlet to the compressor and turbine are 60 and 1000 respectively. If 40,000 ft3 /min. of air enter the compressor and assuming k=1.41, compute:

a) The theoretical net power output, and

b) The air – standard thermal efficiency