Engineering Health and Safety Principles

Engineering Health and Safety Principles 1. What are the main responsibilities of the employer and the employee under Health and Safety Act 1992? Answer : Duties of employers: Every employer shall take all practicable steps to ensure that no action or inaction of any employee while at work harms any other person. Duties of employees Every employee shall take all practicable steps to ensure- (a) the employees safety while at work (including by using suitable protective clothing and suitable protective equipment provided by the employer (b) that no action or inaction of the employee while at work causes harm to any other person. (health and sefatey in employment act 1992, 2014) 2. In marking the choice of which type of cutting fluid to use, many factors have to be considered. Name two of the important factors? Answer: selection of the cutting fluid generally depends on the types of machining process whether coolant, lubricant or both are required. Though selection for the effective cutting fluid depends the various factors which are type of machining , tool and workpiece materials, cutting speed, and the method of application. For example: machining process with slower cutting operation and where tools are exposed to high pressure in such cases fluid with good lubricating characteristics is required. Whereas, selection for the fluid is changed in high speed operation as in high speed operation temperature rises significantly so that fluid which has good cooling capacity and with some lubricity is required. (manufacturing engineering and technology, 2014, p. 617) 3. What is the purpose of chip breakers in the Turning Process? Answer: purpose of chip breaker in turning process: chip breaker controls the flow of the chip during machining. Eliminates the long chips as it can be hazard. Also reduce the heat. Reduce the intendancy of the vibration. (manufacturing engineering and technology, 2014, p. 607) 4. What effect would decrease the cutting speed have on tool life of a milling cutter? Answer: Because high cutting speed increases the temperature which results into the shorting of the tool. (manufacturing engineering and technology, 2014, p. 585) 5. Name two ways work can be held on a cylindrical grinder? Answer: Universal grinding: In universal grinding, both the workpiece and the wheel axes can be moved and swivelled around a horizontal plane, thus permitting the grinding of tapers and other shapes Thread grinding: thread grinding is done cylindrical grinders, using specially dressed wheels matching the shape of the thread. (manufacturing engineering and technology, 2014, p. 748) 6. how is feed specified on a drilling machine? Answer: Diameter of Drill Inches Feed Inches per Revolution Under 1/8 .001 to .003 1/8 to 1/4 .002 to .006 1/4 to 1/2 .004 to .010 1/2 to 1 inch .007 to .015 1 inch and over .015 to .025 (drill feeds and speeds, n.d.) 7. What is the difference between truing and dressing a grinding wheel? Answer: dressing is the process of a conditioning, producing sharp new edges on worn grains on the grinding surface of a wheel Truing: truing is the process of producing a true circle on a wheel that has become out of round. (manufacturing engineering and technology, 2014, p. 744) 8. In wire cut EDM, why does electrode wear not affect the accuracy of the cut? Answer: Because electrode doesnt touches the workpiece. (manufacturing engineering and technology, 2014, p. 781) 9. What is concurrent engineering? Answer: Concurrent engineering also known as integrated product development (IPD) its methodology is based on the parallelisation of task which means preforming the task concurrently. Concurrent engineering prefers to an approach to new product development in which all other engineering functions like design engineering, manufacturing engineering and other functions are integrated together in order to reduce the elapsed time required to bring new product to the market. (concurrent engineering , 2017) 10. In welding, what do the letters GTAW stand for? Answer: Gas tungsten arc welding (GTAW, 2017) 11. Define break-even point when comparing two types of machines making the same part? Answer: Break-even perspective are the purpose which offers precisely disguise its costs. Therefore these methods not lead to any benefit or reduction. When two different machines are making same part, the purpose of which is to offers disguise costs. 12. In machining operations, how does forming differ from generating? Answer: generating: generating machining operations of the workpiece are dependent on the feed or the movement of the cutting tool which involves different turning operations such as straight cutting, taper turning, peripheral milling and profile milling. Whereas forming machining operations is based workpiece geometry dependent on the tool geometry. Cutting edge of the tool and surface of the work part has the reverse shape example: form turning, broaching, drilling. (Forming and Generating Method in Lathe Machine Operations, 2016) 13. What are the two forms of broaching and what types of machine is used for each form? Answer: surface broaches: surface broches which generally used for cutting flat surface. Broches includes slab, slot, contour, dovetail, pot ( for precision external shapes) and straddle. Internal broaches: internal broaches which is generally used for close-tolerance hole. Broches includes hole keyway, internal gear, rifling (for gun barrels). (manufacturing engineering and technology, 2014, p. 684) 14. What is difference between a CNC machining centre and a universal milling machine? Answer: cnc machining centre is computer controlled program, which takes the instruction from the computer to select and control tools that used for cutting or shaping the metal to new product. Whereas universal milling machine is fitted with table so that it can have motion in all direction and also diving head which has ability to change gears so they can perform milling operation in all the direction. (manufacturing engineering and technology, 2014, pp. 703,705,669) 15. State an essential requirement for a lathe, which is intended to be used with diamond tooling Answer: diamond tooling is done when we have to give good surface finish and critical dimension for example: for polishing granite (manufacturing engineering and technology, 2014, p. 614) 16. What type of machining process would be used to cut an external keyway in a shaft? Answer: machining process used to cut keyways in a shaft is keyway broaching also known as spline broaching (coupling answers, 2014) 17. Define what is meant by CAD CAM? Answer: CAD: computer aided design CAD, which basically based on the principle of creating a technical drawing using different software like AUTOCAD, SOLIDWORKS, and PRO-E CAM: computer aided manufacturing Whereas CAM is referred as an software use to control manufacturing process like controlling machining tool which gives high precision. Machine used on the principle of CAM is known as CNC computer numerical control machine. (wikipedia , 2017) 18. Name two materials used to produce EDM electrodes for a sink type machine Answer: The materials which are commonly used for the making sinker EDM electrode are graphite, brass or copper tungsten. Graphite is used because of its superior machining capabilities and wearability, and copper is used because of its fine finish requirements. (qualitty EDM, 2008) 19. What feature controls the cutting speed of a milling centre? Answer: As we know the cutting speed V in peripheral milling is the surface speed of the cutter V = à Ã¢â€š ¬DN Where D is the cutter diameter and N is the rotational speed of the cutter. Thus cutting speed is directly dependent on the diameter and as well as the rotational speed of the cutter. (serope kalpakjian, 2014) 20. What is the main difference in the type of materials that can be machined when using either EDM or Water Jet cutting process? Answer: water jet cutting process: non-conductive material such as glass. Wood, plastic, ceramic EDM: material needs to be electrical conductive as EDM cuts through sparks such as graphite and metal (advanced manufractruring , 2005) 21. Compare 2 of the following casting processes on surface finish, accuracy, type of pattern and cost a. Sand moulding b. Shell moulding c. Gravity die casting d. Pressure die casting Answer: Sand moulding Shell moulding Surface finish Not good machining, forging, may required to obtain the required shape followed by the quality control Good surface finish Accuracy Dimensionally accurate High precision Type of pattern Match plate pattern Many pattern Cost Low cost Low cost (manufacturing engineering and technology, 2014, pp. 705,711) 22. Explain the purpose for which the investment casting process is used. Indicate the type of material that can be cast and some general estimate of the finish and accuracy obtained Answer: Purpose: knee replacement Type of material: ferrous and non-ferrous metal alloys. Surface finish: good surface finish Accuracy: high precision (manufacturing engineering and technology, 2014, pp. 271-272) 23. Explain clearly the difference between the HOT and COLD chamber die casting processes, giving the types of material casting in each process Answer: Hot-chamber process use a piston to forces a certain volume of metal into the die cavity through a gooseneck and nozzle 2.Cold-chamber process is where molten metal is poured into the injection cylinder (shot chamber) (manufacturing engineering and technology, 2014, pp. 278-279) 24. Giving examples of each show the difference between injection moulded and compression moulded plastic parts Answer: Injection moulded plastic Compression moulded plastic in injection moulded is used with thermoplastic polymers Compression moulding is used with thermosetting plastics for example: injection moulding is used for making chair. machine has three main parts i.e. injection unit, mould and clamp. process starts when plastic is poured into hopper from where plastic pallet moves to the barrel of injection unit inside, a screw transports the pallets forward t. heater bands wrapped around the barrel warms up the plastic pallets. as the pellets are moved forward by the screw, they gradually melt, and are entirely molten by the time they reaches the front of the barrel. once enough molten plastic is in the front of the screw it rams forward like the plunger of a syringe. in a matter of seconds, the screw injects the molten plastic into the empty part of the mould called the cavity image. the plastic solidifies in under a minute the mould opens and the part is ejected. for example: compression moulding is used to make rubber boots for which plastic is pre heated and then poured into the mould and held there for few minutes at fixed temperature and then finished product is then removed from the mould and then can be machined for further better finish or removal of the waste (plastic injection molding , 2015) (manufacturing engineering and technology, 2014, pp. 512,520) 25. What is the main difference between Hot Rolling and Cold Rolling, Giving examples of each process? Answer: Hot rolling Cold rolling Low tolerance High tolerance More Malleable Increase strength of material through strain Harding as much as 20% High temperature up to 1000F Low temperature equal to room temperature Sink when cooled down More precise dimensions Hot rolled steel is used in situations where precise shapes and tolerances are not required For example: used in welding and I-beam cold rolled steel is used in situations where precise shapes and tolerances are required. For example: used in production of metal furniture or desks. (n.d.). Retrieved from https://www.metalsupermarkets.com/difference-between-hot-rolled-steel-and-cold-rolled-steel/ administration, n. z. (2014, april 4). health and sefatey in employment act 1992. Retrieved from new zealand legislation: http://www.legislation.govt.nz/act/public/1992/0096/latest/DLM278829.html concurrent engineering . (2017, march 7). Retrieved from wikipedia : https://en.wikipedia.org/wiki/Concurrent_engineering coupling answers. (2014, december 2). Cutting Keyways Broaching, Keyseating, Wire-Cut EDM, Shaping, Milling . Retrieved from coupling answer: http://www.couplinganswers.com/2014/12/cutting-keyways-broaching-keyseating.html crayons, s. (Director). (2015). plastic injection molding [Motion Picture]. drill feeds and speeds. (n.d.). Retrieved from viking drill and tool : http://www.vikingdrill.com/viking-Drill-FeedandSpeed.php Forming and Generating Method in Lathe Machine Operations. (2016, februray 17). Retrieved from mechaenical engineering: https://basicmechanicalengineering.com/forming-and-generating-method-in-lathe-machine-operations/ government, n. z. (1992, jan 1). health and safety employment act 1993. Retrieved from New Zealand legislation : http://www.legislation.govt.nz/act/public/1992/0096/latest/DLM279232.html GTAW. (2017, march 11). Retrieved from wikipedia : https://en.wikipedia.org/wiki/Gas_tungsten_arc_welding metalsupermaket. (2014, septemeber 14). difference between hot rolled and cold rolled steel . Retrieved from metal supermarket : https://www.metalsupermarkets.com/difference-between-hot-rolled-steel-and-cold-rolled-steel/ qualitty EDM. (2008). Electrical discharge machining (EDM). Retrieved from qualitty EDM: http://www.qualityedm.com/sinkeredm.html serope kalpakjian, s. R. (2014). manufacturing engineering and technology. new york: pearson. sme. (2005, october 1). Retrieved from advanced manufractruring : http://advancedmanufacturing.org/waterjet-vs-edm/ wikipedia . (2017, march 24). cad/cam. Retrieved from wikipedia : https://en.wikipedia.org/wiki/Computer-aided_manufacturing

Alas, Babylon :: essays research papers

Alas, Babylon Essay   Ã‚  Ã‚  Ã‚  Ã‚  In the book Alas, Babylon, the author, Pat Frank, discusses the condition of the human race. Mainly, his view differs from others because rather than write about the countries in a nuclear war, he writes about people living in the countries that are involved in that war. His discusses these peoples’ progress, both technological and moral, as well as their use of power. These topics make the book as intriguing as it is to read.   Ã‚  Ã‚  Ã‚  Ã‚  Frank, rather than talk about all mankind’s technological advances, talks about how they have hindered man. He says that we have become dependant on these discoveries. He shows this when Dan Gunn and Mark take turns telling Randy all these things that he has, such as a nice car and a refrigerator, are useless when nuclear fallout occurs. It seems that man cannot function for even one minute without using things that were not even available fifty or one hundred years ago. Frank is warning us that there may be a time when we will need to retain the lifestyle of the nineteenth century, and only the people who have the knowledge of this way of life will be fine.   Ã‚  Ã‚  Ã‚  Ã‚  Frank has an interesting view on the way man has progressed morally. I think that he says that we don’t really know our morals until we have them truly questioned. In this he implies that the people who have strong morals, not only will stay true to them, but will survive. An example of this is Randy Bragg. Randy, on the day of nuclear fallout, stopped on the side of the road to help a woman. This shows that he has respect for the human race as a whole. The opposite of this was Edgar Quisenbury. Edgar valued nothing but money. In the end, the absence of money caused Edgar to become an example of Darwin’s â€Å"Only the strong† theory as he shot himself.   Ã‚  Ã‚  Ã‚  Ã‚  Power is addressed in the book as something that Americans do not take seriously. The use of this power is not shown so much as who is in power. I will use three examples of this. Bubbah Offenhouse was in charge of making everyone aware of what to do in case of fallout. However, he chose not to even hand out information on this because he didn’t want to think about it.

My Summer Vacation in Florida Essays -- Summer Vacation Essays

Have you ever been on a vacation? To me a vacation is a time to be with friends or family. When I think of vacations, I think of packing, the flight or drive, and relaxation. Not only is it very exciting to go on a vacation, but you get closer to the people that go with you. Linda, my best friend's mom had asked me if I would want to go with their family to Florida. When she asked me I thought she was kidding, but when she said, "I need to know because if you are I need to get you a airplane ticket," I knew she was serious. I was so excited I could have kissed her. I was going to Florida with my best friend, Lisa, and her family. The people from Lisa's family that were going were Tina, Randy, Ashley, and Linda. Tina is Lis'?s sister, Randy is Tina?s husband and Ashley is Tina?s daughter. Linda is Lisa?s mom and she was the only one out of all Lisa?s family I knew. Going on a trip packing is defiantly a priority. The whole week before the trip I had began packing. I didn?t realize how many things I was going to need until I started packing. I packed two suit cases full of clothes, but I figured I?d rather have more clothes because you never know what the weather will be like. I packed cards, connect four, guess who, I pod, and food so we wouldn't be bored on the flight. When I was done packing my mom asked ? Are you moving out?? The night before leaving I couldn't sleep. When I woke up that morning it was a beautiful spring day. The sun was shining brightly, and the clouds in the sky looked like giant marshmallows. I was so excited because this was my first time going on a vacation. I had already put my suitcases and bags in my car the night before. After I said my goodbyes to my family, I was on my way. I met with Lisa a... ...icking because we didn?t want to miss our flight. Randy called the company where he had rented the van from and they came to pick us up. We made it to the airport just in time because when we walked in the airport they called our flight. This made us very relieved. The flight home went just as well as the flight there except this time I didn't have the butterflies. Overall going on a vacation is something I want to do more in the future. I learned many things from this vacation such as even though you go with some people you don't know as well, you get to know them and by the end of the vacation it's like you have known them your whole life. This vacation brought my friend Lisa and I closer because we experienced things together. Going on a vacation with someone makes your relationship stronger and you find out many different likes and dislikes about each other.

Issues of Youth in Pakistan

ISSUES FACED BY YOUTH IN PAKISTAN Youth, in this era of modern technology, is facing problem all over the world. But especially in developing countries of the world like Pakistan our youth is helpless and are growing up without clear goals and ideals. Of the 15 largest countries in the world in terms of population size, Pakistan has the largest population of the youngest people. In one’s mind this question may arise whether such a large population be regarded as a burden or an asset for country. But in my view such a large population could prove itself an asset towards the country.This demographic situation provides our Pakistan’s youth with an extra ordinary opportunity that because of such a large young population our country could compete even with the developing countries of the world, then how could this population be designated as a burden. Particularly when we talk about the young people of Pakistan then we will get to know that our youth counter through number o f issues from their education period up till their settlement in life. Hardest of all the time is the duration of their career making. Unemployment is the major issue confronted by our youth. Today 12% of our youth is unemployed.Most of the educated students such as degree holders of Bachelors and Masters have no value in national or international market now. These unlucky guys are delivering pizzas and doing other door to door services. Some of them are so unlucky that they don’t even get such kinds of job too. Another prejudice being done every day to our youth is favoritism. It is processed in every organization of our country from lowest to highest level. Students who belong to any political parties or are far relatives of any high post officials they get job easily within few hours without any struggle.Although they are impotent for that job, and because of this brilliant students are deprived of their right. Another problem being faced by our youth is flawed education s ystem in our country. There is no unification in education system. 3 to 4 systems are running at a parallel level. Students of private educational institutions such as NUST and LUMS are being taught entirely in different way as students of government institution are taught. Most of the students are misfit in their positions. They are not satisfied with their careers and jobs. Those who wanted to become engineers they are in medical colleges and vice versa.The reason behind this is improper education counseling. They are not guided properly and many of them are enforced by their parents to join particular field. In developed countries students are being counseled after regular intervals for their better future but there is no such system in our country which could recognize the true talent of our own students. Our youth has lost its identity. Western and Indian culture has submerged gradually deep in our roots and are targeting our youth. They are easily targeted because they are far away from their own religion and culture and due to this they are lost in the blind end of street.Dilemma of our youth is that they are talented and are capable enough to compete with the students of other countries but they are getting no chance to show their inner talents. Their talent is not being utilized in proper way. Their energies are used by political parties for their own sake. Negative role of media is another factor which is exploiting our youth. Youngsters are running in a race to copy the latest fashion as soon as possible. For this youngster especially young girls waste several hours in watching channels such as STYLE 360 to keep an eye on latest fashion. To look cool they smoke, drink wine etc. nd all this they learn by media, imitating their favorite TV actors. Computers and mobile phones instead of using them in a positive way they are being used to boast off. Message packages and late night packages provided by different phone companies like TELENOR, UFONE, WARID , JAZZ etc. and our youth instead of concentrating on their studies they are involved in such activities talking and texting all night and sleeping at day time during the class which in the end affect their grades. All of these problems are leading towards the mother of all problems which is FRUSTRATION.Our youth is frustrated because of poverty, unemployment and injustice to them in society. Consequence of this is abundantly drug usage, suicide attempts, terrorism in some cases, rape and increase in crime rates. Depressed youngsters indulge themselves in unhealthy activities which not only harm the society but themselves too. They are either captured by corrupt company of gangsters or they themselves inhabit the company of bad boys who entangle these depressed one’s and spoil their whole life. And if he is the sole earner of family then we could imagine the destruction of lives of his whole family.In this whole scenario youth need health resources, awareness, time for relaxa tion and affordable healthy entertainment but we are lacking all these things. Our youth should be engaged in such activities which enhance their talent and also contribute towards the development of country. Ministry of youth affairs take such initiatives so that youth is benefited in some way or other. But if the government properly support youth as in developed countries then we will gradually see the progress in economy of our country which will ultimately lead us to prosperity. INSHALLAH.