1. A premixed stoichiometric methane-air flame has a laminar flame speed of 0.33 m/s and a temperature of 2200 K. The reactants are initially at 300 K and 1 atm. Find the velocity of the combustion products relative to the flame front and the pressure change across the flame. Assume that the reaction goes to completion and there is no dissociation.

2. Repeat Problem 1 for a premixed stoichiometric methanol-air flame. The flame speed is 0.48 m/s and the flame temperature is 2000 K.

3. For methane, the maximum laminar flame speed in pure oxygen is 11 m/s, whereas in air the maximum flame speed is 0.45 m/s. Explain what causes this increase in the flame speed.

Need help please.

1. The material removal rate of EDM process increases with (select all that apply):

a.Decrease in the melting temperature of the workpiece material, T_m

b.Increase in the discharge current, I

c.Voltage

d.Increase in the melting temperature of the workpiece material, T_m

e.Decrease in the discharge current, I

2. The volume between teeth in saws and broaches is called:

a.Relief

b.Kerf

c.Pitch

d.Gullet

3. Final dimensions of machined features are not the same as dimensions of the tool (or mask) in the following process/processes (select all that apply):

a. Electrical discharge machining (EDM)

b.Photochemical machining (PCM)

c.Electrochemical machining (ECM)

4. What is called a tooth set in saws?
a.The shape of the cutting teeth (their profile).

b.Orientation of the blade (teeth): vertical, horizontal, angled.

c.The way the insert teeth are seated and fixed in the blade.

d.The way in which the teeth are offset from the centerline in order to make the cut be wider than the thickness of the back of the saw blade (or gage)

5.What must be taken into account when using electrochemical machining for parts that need good dynamic strength and fatigue resistance? Select all choices that apply.

a.Chemicals may etch material around grain boundaries at a higher rate. These small cracks represent stress concentrators so additional treatment is needed to remove them, or special care should be taken to avoid grain boundary attack during ECM.

b.There are no negative aspects of ECM on fatigue strength.

c.Splatters that occur at edges.

d.Absence of residual stresses. Subsequent treatment is needed to introduce compressive residual stresses.

6. When using push broaches, one should pay attention to what?

a.velocity at the end of the cut

b. chipping

c. nothing special compared to broaches

d. buckling

e. alignment

7. Which machining operations are capable of making rectangular-shaped keyseats in hubs (holes)?

a. Boring

b.Broaching

c.Turning

d.Shaping

e.Milling

8. In general, nontraditional machining (NTM) technologies have these advantages over traditional machining (select all that apply):

a. Materials that are otherwise difficult to machine do not represent special difficulty for NTM processes.

b.Dimensional accuracy of machined parts is better.

c. Surface finish of machined features is better.

d. It is possible to drill holes with extremely small diameter and very high depth-to-diameter aspect ratio.

e. Residual stresses are smaller or absent.

9. What is used to degrease the pull (or push) force in broaches and/or help easier chip breaking? Select all that apply.

a. Progressive teeth design for flat broaches

b.Push/pull force cannot be reduced in broaches

c.Notched teeth

d.None of the above

e.Rotor or jump teeth

What is Standard Work? What are the benefits of a one-piece flow versus batch manufacturing? What examples have you seen which are either good or bad examples of Standard Work? If bad, what could have made it better? What is the key Lean Tool to have a successful Standard Work Kaizen?

What is Standard Work? What are the benefits of a one-piece flow versus batch manufacturing? What examples have you seen which are either good or bad examples of Standard Work? If bad, what could have made it better? What is the key Lean Tool to have a successful Standard Work Kaizen?

Your scenario: You are a member a small engineering firm with a staff of 8. Your team meets every Wednesday morning for a meeting to review projects and activities.Engineers provide updates on projects and discuss problems they are having; the boss throws out new project ideas, and everyone enjoys some social time, chatting about hobbies and families.

Frequently, these meetings run well over an hour and don't always get very much accomplished. What to do? Your employer, the owner of the firm, seeks you out because of your strong writing ability and asks you to solve a problem. These folks are all highly paid, and meetings that don't accomplish much are still costing the firm a lot of money...like the equivalent of one 8 hour day a week! (over 400 expensive man and woman hours a year)!

Your task:

1. Find out how to conduct effective meetings and write up a policy/procedure (i.e. directive) memo to the staff about how meetings will be conducted in the firm to be efficient and cost-effective. Consider as well what communications should/could be handled outside the meetings or in other ways. Here's a link to how to conduct a meeting that may be helpful! This is only one of many that are available to you just by searching.

2. Create a meeting agenda/minutes template for conducting and recording minutes...be creative and use the table tools in Word, NOT a template you find!!!!! Remember, you are creating the guidelines for the meeting rules YOU are setting.

The following link might be helpful...

http://projectmanagementhacks.com/meeting-tips/

Fundamentals of Engineering Thermodynamics By Michael J.Moran 8th edition

5.83)Two kilograms of air within a piston-cylinder assembly execute a Carnot power cycle with maximum and minimum temperatures of 750 K and 300 K, respectively. The heat transfer to the air during the isothermal expansion is 60kJ. At the end of the isothermal expansion the volume is 0.4m^3. Assuming the ideal gas model for the air, determine

(a) the thermal efficiency (b) the pressure and volume at the beginning of the isothermal expansion, in KPa and m^3, respectively. (c) the work and heat transfer for each of the four processes, in kJ. (d) Sketch the cycle on P-V coordinates.

Determine the temperature rise in the specimen for each case in Problem 6.75 (Open-die forging of a cylindrical, annealed copper specimen 10 mm high and 25 mm in diameter, up to a reduction of 50%, for the cases of (a) no friction between the flat dies and the specimen, (b) ? = 0.10, and (c) ? = 0.30. Ignore barreling.), assuming that the process is adiabatic and the temperature is uniform throughout the specimen. Given: K=315 MPa; n=0.54 from table 2.2 p.38. ?=8970 Kg/m3 ; CP=380J/KgK from inner cover page.

3) Derive the matrix equation used to solve for the coefficients for least-squares polynomial regression for a quadratic model.

4) Derive the matrix equation used to solve for the coefficients for least-squares multiple linear regression for a function of 2 variables.

break down of the system in sub system?

when we are adding spring and damper in series and parallel in second order system

write a “quiz” program on a topic, about which you are knowledgeable. this quiz can be work related, general knowledge or any set of questions where there is a specific answer. ignore questions where long descriptions or general answers needed. the program should display the questions, one at a time, and possible answers, and accept an answer from the user. if the answer is correct, the program should go on to the next question. if it is incorrect, store the question for the second attempt and go on to the next question. when the list of questions has ended, the questions that were missed previously, or answered incorrectly, should be displayed again, in their original order. keep a count of the correct answers for each category of questions and display the final count after two attempts. also, display the correct answer, when necessary, in the second round of questioning. limit the quiz to ten (10) questions. include questions from both true/false and multiple-choice categories. four (4) possible answers should be listed in multiple-choice questions.

Write an ESSAY on what you understand about:

1. Anti- Ice and De-ice

2. Type of Ice

3. Type of ice accretion detectors

4. Areas need for protections

5. 4 principle of Anti-ice

6. Rain protection.

MAKE YOUR OWN WORDINGS. Same content 60%

Explain the importance of mechanical engineering in today’s society. 800 words.

A 20 kg block of iron and a 50 kg block of lead are sealed together in a tank with 5 kg of air. Initially the iron, lead, and air are at 200°C, 150°C, and 20°C, respectively. The air is initially at 100 kPa. After some time, the final system reaches thermal equilibrium and the air pressure inside the tank is 141 kPa. How much heat transfer occurred between the tank and the surrounding 20°C air? How much total entropy has been generated? There is air inside and outside of the tank.

Mark Each One True (T) or False (F)

33. Polymers have only covalent bonding and no other type of bonding.

34. Weight average molecular weight and number average molecular weight are the same.

35. Teflon is the same structure as polyethylene but with one out of every four H replaced by F.

36. Organic polymers have C-C bonding.

37. Thermoset plastics are easily melted to form recycled products.

38. Ceramics at room temperature can have both elastic and plastic deformation in tension if the stress is high enough.

39. The lowest density structural metal is Mg.

40. Ti is used in biomedical implants.

41. Wrought iron has less than 0.008 wt.% C and is very soft and easy to form.

42. Cast iron has high amounts of carbon (2-4.5 wt.%) are is relatively hard and brittle.

43. Stainless steels contain Cr to prevent corrosion.

44. The higher the hardenability, the more difficult it is for a steel to transform to martensite when quenched from an annealing temperature.

45. Ceramics can have mixed ionic-covalent bonding.

46. In general, polymers are more ductile than metals.

47. The fracture stress for most polymeric materials is lower than most metals.

48. Polyvinyl chloride (PVC) is made with only Cl and C atoms.

49. SiO2 based glasses have an amorphous structure.

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are at 300 K. The pipe of 125-mm diameter has an emissivity of 0.85 and an outer surface temperature of 373 K. Calculate the rate of heat loss per unit length from the pipe.

Answer should be close to 384W/m

Please show all work neatly