write 200 words (screw drivers )

To select materials based on properties, manufacturing, sustainability, available time, cost and performance.

Keywords:       properties, processing, performance, sustainability

Prerequisite Knowledge:          basic knowledge of general materials’ properties.

These factors can be broken down into the following areas.

Material Properties

The expected level of performance from the material

             Material Cost and Availability ?

             Processing - must consider how to make the part

Environment – the effect that the service environment has on the part The effect the part has on the environment. The effect that manufacturing/processing has on the environment.

Time available to make the component

A well-insulated rigid tank contains 3kg of saturated liquid vapour-mixture of water at 250kpa. Initially, three quarters of the mass is in the liquid phase. An electric resistance heater placed in the tank is turned on and kept on until all the liquid in the tank is vaporizer. Assuming the surroundings to be 25 degrees Celsius and 100kpa

Determine:
a) The exergy destruction and
b) The second law efficiency for the process.

A beam is subjected to equal bending moments M = 6.5 kip-ft, as shown. The cross-section of the beam is also shown. The top rectangular area (1) has cross-section dimensions b1 x d1, as shown, where b1 = 6.5 in. and d1 =1.50 in. The left and right rectangular legs (2) and (3) are of dimensions b2 x d2 as shown, where b2=0.75 in. and d2=6.0 in. Determine: (a) the centroid location, the moment of inertia about the z axis, and the controlling section modulus about the z axis. (b) the bending stress at point H, which is located yH = 1.0 in. below the z centroidal axis. State whether the normal stress at H is tension or compression. (c) the maximum bending stress produced in the cross section. State whether the stress is tension or compression. Calculate the cross-sectional areas A1, A2, and A3 for areas (1), (2), and (3), respectively. Answers: A1 = in.2. A2 = in.2. A3 = in.2.

Part 2 Determine the location of the y direction centroids of areas (1), (2), and (3) with respect to the reference axis at the bottom of the cross-section.

Part 3 Determine the centroid location in the y direction for the beam cross-section with respect to the reference axis at the bottom of the cross-section.

Part 4 Determine the moment of inertia Ic1 for area (1) about its own centroid, y1.

Part 5 Determine the moment of inertia Iz1 for area (1) about the z centroidal axis of the cross-section.

Part 6 Determine the moment of inertia Ic2 for area (2) about its own centroid, y2.

Part 7 Determine the moment of inertia Iz2 for area (2) about the z centroidal axis of the cross-section.

Part 8 Determine the moment of inertia Ic3 for area (3) about its own centroid, y3.

Part 9 Determine the moment of inertia Iz3 for area (3) about the z centroidal axis of the cross-section.

Part 10 Determine the moment of inertia Iz for the cross-section about the neutral axis.

Part 11 Determine the section moduli Stop and Sbot of the cross-section. Note which one is the controlling section modulus.

Part 12 Determine the bending stress at point H (positive if tensile, negative if compressive).

Part 13 Determine the maximum bending stress produced in the cross section. Make a note on paper of whether the stress is tension or compression. Note that the maximum bending stress is the bending stress with the largest absolute value. However, report the answer here using the correct sign according to the flexure formula.

5) Name the different types of thermal cutting and discuss designing tooling for thermal cutting.

8) Discuss tooling for adhesive bonding and describe how it is different from other tooling. What are the eight different type of loading that can be applied to a bond line?

A disk with outer radius ro = 150 mm and inner radius ri = 25 mm is press-fitted onto a shaft of radius 25.075 mm. Both members are steel with Young’s modulus, E = 205 GPa, Poisson’s ratio, ? = 0.29, and density, ? = 7845 kg·m-3. Determine and plot the radial and tangential stress distributions in the disk and shaft when it is rotating at 5000 rpm. Under the above conditions, what is the magnitude of the Von Mises stress at r = 100 mm?

4) Discuss laser fixtures and tooling for soldering and brazing and how these methods require some special considerations for making them.

3) Discuss some general design considerations when making welding fixtures and also discuss some general clamping considerations when making welding fixtures.

2) Name some types of resistance welding and discuss some design considerations when making them.

Discuss Arc Welding and Gas Welding fixtures and some considerations when making them

A heat pump uses groundwater at 12°C as an energy source. If the energy delivered by the heat pump is to be 60 MJ/h, estimate the minimum mass flow rate of groundwater if the compressor operates with R-134a between pressures of 100 kPa and 1.0 MPa. Calculate the minimum compressor power.

a.Below table shows the number of conforming products in 20 days. (a) Set up the fraction nonconforming control chart for this process. Plot the preliminary data in Table on the chart. Is the process in statistical control? B.Assume that assignable causes can be found for any out-of-control points on this chart. What center line and control limits should be used for process monitoring in the next period?

Write the procedure for steam purging

Problem Solve m x''+ kx = 0 for m=2 kg, k=18 N/m and the following initial conditions:

a) x0 =1 mm, v0 = 3 mm/s

b) x0 = -1 mm, v0 = 3 mm/s

c) x0 =1 mm, v0 = ?3 mm/s

d) x0 = ?1 mm, v0 = ?3 mm/s

e) x0 = 0, v0 = ?3 mm/s

f) x0 = 0, v0 = 3 mm/s

g) x0 = ?1 mm, v0 = 0

h) x0 =1 mm, v0 = 0

Write the procedure for fuel gas purging