1. An annealed aluminum alloy slab with a thickness of 12 mm and width of 1m is to be cold rolled to a thickness of 9 mm using 2-high rolls with roll diameter of 1m. The rolls have a coefficient of friction of 0.08 and they are rotating with a speed of 18 RPM. The aluminum has an entrance speed of 50 m/min and a width that does not change as a result of drawing. The strength coefficient K =240 and strain hardening exponent n =0.15. Please answer the following:

1. Is the proposed reduction possible?
2. Calculate the rolling forward slip.
3. Calculate the rolling force (N).
4. Find the total power (W) consumed by the process.

The mass-spring-damper system has a 2 kg block is displaced by an amplitude of 50 mm and
released. Ifthc phase angle ofrcsponse is 84.17o, how many cycles (m) will be executed beforc
the amplitude is reduced to I mm. What are the undamped natural frequency m« and spring
constant k ifthc period ofdamped oscillation rs is 0.3 scc.

Blood flows through a ventricular assist device (a pump) at a rate of 100 mL/s. It enters at a pressure of 110 kPa, temperature 36.50°C, and speed 0.25 m/s. It leaves at 125 kPa, temperature 36.52°C, and speed 0.40 m/s. Heat transfer from the blood in the pump is negligible. The outlet is 40 mm above the inlet. (Note: the thermophyhsical properties of blood may be approximated by properties of liquid water at 37°C.) (a) Calculate the rate of work done on the fluid by the pump. [13] (b) Calculate the fraction of pump work converted to enthalpy, kinetic energy, and potential energy. Comment on the relative importance of these effects. [4] (c) What fraction of pump work is used to raise the temperature of the blood? [3] (d) Calculate the minimum power required to pump the blood with the flow rate and pressure rise given here. Why is higher power required in practice? [5]

3) A torsion spring is used in a hand-held spring clamp. The jaws of the clamp are 1.5 inches from the pivot. The spring angle is 45° when the clamp is closed and 0° when the clamp is open. Determine torsional spring constant, clamping force when closed and clamping force when open. Use units of torque/rev for torsional spring constant. Include leg length in Na calculations.

d = 0.078 in OD = 0.396 in Nb = 3.25 θfree = 90° music wire legs L1 = L2 = 1.5 in

kθ _____________ Fclosed _____________ Fopen _____________

A 400-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 33 percent. (i) Sketch an appropriate illustration for this heat engine clearly showing the heat source and sink. (ii) Determine the rate of heat transfer to the river water. (iii) Will the actual heat transfer rate be higher or lower than this value? Why?

How applied mechanics terminologies such as moment, moment of inertia and frictional matters are involved to theoretically design hydro power and wind mills for renewable energy supply? Define the terminologies in their usual applications

A rigid tank contains a saturated liquid-vapour mixture of water in an equilibrium state. The volume of the tank is 110 m3 and the temperature of the water in the tank is 115°C. In the tank, 70% of the mass is liquid and 30% of the mass is vapour. Please calculate the total mass of water in the tank.

Steel Structures: The rolling process is one of the most frequently used forming processes for producing steel sections. Nonetheless, other forming and fabrication processes can be used to create a range of section shapes in the steel production process. For this assignment, you are required to review the other four types of steel forming/fabricating processes including drawing (manufacturing), extrusion, casting and forging

Task 1: (IN YOUR WORDS)

Write (250 words), Review the extrusion process and mention the type of section(s) produced from this process. You should also mention the limitation(s) of this process.

Please be accurate in your answer

A turbine blade of solution annealed INCOLOY alloy 800 is 18 in long and operates at 1400 degrees Fahrenheit. If the tip clearance is 0.2 in and centrifugal forces induce an average longitudinal stress of 10 ksi. After how many hours is expected the blade to interfere with the turbine stator due to creep?

A fire-tube boiler made from carbon steel in which fuel gas flows within the tube while the boiler feed-water along with condensate from the plant flows on the shell-side. Visual inspection revealed heavily localized tubercles were seen on the outside surface of several tubes. After about 11 months of operation, the pipe was leaked and visual inspection found pin holes outside surface contain loose brownish rust. The rust contained chloride and was acidic in nature. Select appropriate corrosion prevention to apply and identify types of corrosion happen.

Give five examples and show how phychiometry play an important role in your daily life routine.

1) Saturated liquid water at a pressure of 10 kPa is sent to a steam boiler with a pressure of 4MPa with a reversible adiabatic pump and heated up to 500oC at constant pressure in the boiler. The mass flow of the steam is 4.2 kg / s. Transactions are carried out continuously.

a) Show the processes on the T-v or T-s diagram with saturated vapor and liquid curves.

b) Calculate the required pump power

c) Calculate the amount of heat spent per unit time in the boiler

i) A series of cold rolling operations are to be used to reduce the thickness of a metal plate from 50 mm to 20 mm in a reversing two-high mill. Roll diameter is 600 mm, and coefficient of friction between rolls and work is 0.15. The specification is that the draft is to be equal on each pass. Determine:

(a) Minimum number of passes required

(b) Draft for each pass

ii) Suppose that the percent reduction rather than the draft were specified to be equal for each pass.

(a) Determine the minimum number of passes required

(b) Determine the draft and exiting stock thickness for each pass