Select a solid, rectangular, Eastern hemlock beam for a 5m simple span carrying a superimposed uniform load of 4132 N/m

a. What is N-S equations for incompressible flows in cartesian coordinates in long form (in x,y,z coordinates)?

b. What is continuity equation and N-S equations for incompressible flows in polar coordinates in long form (in r,θ,z)

c. What is N-S equations in x direction for Planar Couette- Pouseille flow and derive an equation for velocity variation using boundary layer conditions

d. Assume an incompressible, steady, axissymmetric, fully developed Pouseille flow in a cylindrical pipe (infinitesimally long in z direction). The flow is in z direction, and radial and tangetial velocity is zero. Derive and simplify the N-S equation in z direction to find out the velocity in z direction. (need to use the boundary conditions to solve for integration constants)

Question 2

2.1       A brass rod of 25 mm in diameter is enclosed in a steel tube. The tube is 10 mm thick with an outside diameter of 50 mm. The bar and the tube are initially 1 m long and are rigidly fastened together at each end. Calculate the stresses in the two materials when the temperature is raised by 80 ⁰C.                               

2.2       If the composite bar is then subjected to an axial tensile load of 60 kN, find the resulting stresses.                                                                                                           

2.3       Calculate the final length of the composite rod. (use brass rod)                     

            E_st = 200 GPa; α_st = 12 x 10^-6 / ⁰C

            E_br = 100 GPa; α_br = 19 x 10^-6 / ⁰C

Case Study In Francisco Automotive Manufacturing Plant, a large number of engineering activities are carried out in a wide range of areas. These activities include design, production of parts, assembly, testing, and quality assurance. Many of the manufacturing processes in the plant are performed using automated technologies and equipment. People also perform some of the manufacturing tasks and the plant employs over 400 workers. The decision on whether people or machines will be used for a particular task is dependent on many factors, including costs, time, quality and worker health and safety. The plant considered here produces a many parts for vehicles and assembles them. Among the parts produced are engine materials and parts, pumps, fans, some exterior parts, and electronics components. The plant normally operates three shifts per day and has production lines including machining equipment, conveyers and overhead cranes, punch presses, and paint-spray booths. The plant utilizes electricity and natural gas extensively. A number of workers at the plant have over the last six months been subject to several different health problems. The following information has been received by the head engineer at the plant. a) In an assembly area that was installed recently, workers have to bend to the ground throughout the day to attach several small parts onto a large and heavy vehicle component. Some workers have begun to develop lower back pain, likely due to the repetitive bending. The problem has become so severe for one of the workers that he has been told by his doctor to stay off work for two weeks so his back can recover. The manufacturing engineers who designed the assembly operation had wanted to use an automated system, but that option was deemed not to be economic. So they used a manual operation, but did not take into account industrial ergonomics, as they had no expertise in that discipline. b) An increased incidence of respiratory illnesses has been reported over the last month by workers operating near the paint-spray booths. Many of the substances used in the booths (paints, solvents, etc.) are known to be causes of the observed respiratory illnesses. But the workers are not supposed to come into contact with any of the substances because the paint-spray booths are designed to ensure that all materials exit the plant through a high capacity ventilation system and that no materials can leak back into the plant. No tests had been carried out on the ventilation system, or on the air quality around the paint spray booths, so it is uncertain whether or not there have been any leaks into the plant from the paint-spray booths. c) In an area of the plant where metal cutting occurs and workers use protective eyewear, workers have reported minor eye injuries. The area in question is one where it is common knowledge that the workers do not routinely use the protective eyewear. It is often observed to be hanging on nearby hooks or to be loosely hanging around the necks of workers. Workers complain that they find the protective eyewear uncomfortable and do not think it is needed or important. The plant manager knows of this behavior but overlooks it, since enforcing the use of the protective eyewear seems may make the workers unhappy and, consequently, less productive. That, he feels, could render the plant non-competitive.

Question:

1) Should the head engineer endeavor to rectify the health problems on her own, or should she report the problems to the plant manager beforehand? The head engineer is not sure if she will receive the support of the plant manager in rectifying the problems; what should she do if support is not provided?

2) Do you feel that some of the health problems that have occurred are due to worker health and safety being unduly compromised to allow the plant to be more productive or profitable

3) Which of the unsafe conditions and acts identified in part b are (1) of a technical nature, or (2) related to human behavior or management

An open forging die used to forge a cylindrical part with the initial diameter is 45 mm and the initial height is 40 mm. The coefficient of friction at the die-work interface is 0.20. The height after forging is 25 mm. The yield strength of the work material is 285 MPa, and its flow curve is defined by a strength coefficient of 600 MPa and a strain-hardening exponent of 0.12. Determine the force in the operation (a) just as the yield point is reached (yield at strain = 0.002), (b) at a height of 35 mm, (c) at a height of 30 mm, and (d) at a height of 25 mm.

case study related to "lifting Hazards to human body in workplace"

Define the Reynolds number for pipe flow, film flow, annulus flow and particle

motion in a fluid.

A syngas fuel consists of these following volumetric composition: 75% methane and 25% butane. The syngas at 100 kg/hour and 25 C is mixed with 20% excess air at 30 C. Due to incomplete combustion mechanics, 10%v of the syngas carbon is partially oxidized and forms carbon monoxide.

If the products of combustion are at 600K, obtain the combustion heat transfer rate from the system.

A steam powerplant operating on an ideal Rankine Cycle is operating at a boiler pressure of 5.75MPa, steam enters the turbine at 500°C and expands to 147kPa. If the powerplant is producing 5MW of energy find the following:

1. Enthalpies at each point of the cycle 1,2,3,B (hint: you will have to interpolate horizontally for point 1 and interpolate for the f,g,fg values for point 2)
2. Net work in kj/kg
3. Mass flow rate of throttle steam used by the powerplant
4. Heat added in the boiler
5. Heat rejected in the condenser
6. Cycle Thermal efficiency

Q1.
a. List and discuss the three basic types of engineering production.
b. List the role of Quality Control and Inspection during the manufacture of a product.
c. List any two reasons why automation is preferred for a modern manufacturing concern.
d. List any two factors that compel industrial outlets to computers in design, manufacturing and
allied services.

A round composite bar is used to conduct heat. It is held at 600K at one end and 1000K at the other end but all other surfaces are insulated. The two end pieces of the bar are Stainless Steel (AISI304), and the middle piece is Copper. The length of each piece of the bar is 0.2m (total length is 0.6m) and the diameter is 0.07m.

A) Change the middle piece of the round bar to stainless steel to make the bar of uniform material. Change the boundary conditions to make this bar a fin with a constant base temperature and with an insulated end. Apply convection at all cylindrical surfaces except the base and the tip. The convection coefficient, h = 50 W/(m²·K), and fluid temperature of T_∞ = 300K. Plot the temperature

B) Plot the analytical solution of the temperature distribution for this fin versus the fin length (T vs x). Include your hand calculations.

The system has zero -3, poles -2 ± j and gain 5.

Please find the Transfer Function of the closed loop unity feedback system.

Discuss a technical problem you have experienced with a device, equipment or vehicle in form of a story (one paragraph).

Note: you have to follow the problem solving checklist as follows:

1. User's observations

- nature of fault

- circumstances of faults

external factors

2. Process of elimination

3 - Identify the failure

4 - Determine action and urgency

Please Solve As soon as
Solve quickly I get you two UPVOTE directly
Thank's
Abdul-Rahim Taysir

1. (USE MATLAB) Create a table using fprintf that shows the conversion from US Dollars to Yen, Euros, Mexican Peso, and Canadian Dollars. Use the internet to find the conversion factors. Prompt the user for the US Dollar amounts they want to see conversions for.