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Make a short video  to talk about typical problems typical problems of plastic injection moulding and explain causes and solutions to these problems

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Make a short video  to talk about typical problems typical problems of plastic injection moulding and explain causes and solutions to these problems

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Make a short video  to talk about typical problems typical problems of plastic injection moulding

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Make a short video (1-3 minutes) to describe the following plastic moulding process using the diagram belowSuggested questions:

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Make a short video (1-3 minutes) to describe the following plastic moulding process using the diagram belowSuggested questions:

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Make a short video to describe the following plastic moulding process

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Make a video (1-3 minutes) to talk to your customers about maintaining a machine tool he/she bought from your company. Then give recommendations for maintaining the machine tool in short-term and long-term period

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Make a video (1-3 minutes) to talk to your customers about maintaining a machine tool he/she bought from your company. Then give recommendations for maintaining the machine tool in short-term and long-term period

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Make a video to talk to your customers about maintaining a machine tool he bought from your company

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Make a video (1-3 minutes) to present your understanding of plastic.

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Make a video (1-3 minutes) to present your understanding of plastic.

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Make a video (1-3 minutes) to present your understanding of plastic.

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Write a paragraph (120-140 words) about your understanding of plastic.You should mention the seven types of plastic and their codes, a common type of plastic with its properties and its applications.

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Write a paragraph (120-140 words) about your understanding of plastic.You should mention the seven types of plastic and their codes, a common type of plastic with its properties and its applications.

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Plastic is divided into seven types. They are polyethylene terephthalate (PET), high-density polyethylene (HDPE), polyvinyl chloride (PVC), low density polyethylene (LDPE), polypropylene ( PP ), polystyrene (PS) and others. PET that belongs to group member one is made out of polyethylene terephthalate. It holds the number one spot because of its widespread utility. It is mostly used for food and drink packaging purpose due to its oxygen prevention. Beverage bottles are among the main plastic items that come for PET. it has high mechanical strength, high tear and impact resistance, wear resistance and strong hardness. You can easily identify Polyethylene Terephthalate plastic by the number 1 symbol in the triangular "arrow", usually found on the bottom or side of the packaging. Also, PET bottles are the most widely recycled plastic in the word

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Make a short video (1-3 minutes) to talk about basic information of plastic (qualities and uses of plastic) using the following suggested questions.

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Make a short video (1-3 minutes) to talk about basic information of plastic (qualities and uses of plastic) using the following suggested questions.

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make a short video (1-3 minutes) to talk about basic information of plastic

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Make a video (1-3 minutes) to describe the manufacturing process of a gear using the following suggested questions and pictures.

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Make a video (1-3 minutes) to describe the manufacturing process of a gear using the following suggested questions and pictures.

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https://youtu.be/GtohOY_Z9xM

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Make a video to describe the manufacturing process of a gear

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Make a video (1-3 minutes) to describe the manufacturing process of the wheel

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Make a video (1-3 minutes) to describe the manufacturing process of the wheel

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https://youtu.be/ixNc9U-NJ4U

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Make a video (1-3 minutes) to describe the manufacturing process of the wheel

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Write a paragraph (120-140 words) to present maintenance schedule of machine tools using the following suggested questions.

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Write a paragraph (120-140 words) to present maintenance schedule of machine tools using the following suggested questions.

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What is the name of the machine tool?

What are its features/ functions?

What are some kinds of maintenance work and their schedule for the chosen machine tool?

Why do we need to carry out these kinds of maintenance work?
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This is the milling maintenance schedule. Milling machines are among the most versatile. Usually they are used for milling flat surfaces, but they can also be used to machine complex profiled surfaces. Renew oil need cleaning weekly to help the machine operate smoothly. If the engine oil changes are neglected, the internal parts of the machine will overheat and work ineffectively. You need to inspect the oil level daily to ensure engine efficiency. If the oil level was low, your engine would overheat, leading to expensive repair. You had better clean the guideways every day to avoid interruptions and control the line of motion of fluids. The lubricate machinery need to be cleaned every 3-4 months to cut down on friction and heat. You should clean the machine weekly to remove dust and dirt.

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Write a paragraph (120-140 words) to present maintenance schedule of a machine tool using the following suggested questions and information in the table

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Write a paragraph (120-140 words) to present maintenance schedule of a machine tool using the following suggested questions and information in the table

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What is the name of the machine tool?

What are its features/ functions?

What are some kinds of maintenance work and their schedule for the chosen machine tool?

Why do we need to carry out these kinds of maintenance work?
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This is the lathe maintenance schedule. Materials are turned on a machine called a lathe. Part of the materials is removed to make the correct shape. The guideways should be cleaned daily to avoid interruptions and control the line of motion of fluids. You need to inspect the oil level daily to ensure engine efficiency. If the oil level was low, your engine would overheat, leading to expensive repair. You should renew coolant to prevent damage, keep engine at the correct operating temperature, help it warm up quickly in cool weather and not get too when under stress. Renew oil need cleaning weekly to help the machine operate smoothly. If the engine oil changes are neglected, the internal parts of the machine will overheat and work ineffectively

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Write a paragraph (120-140 words) about typical problems typical problems of plastic injection moulding and explain causes and solutions to these problems

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Write a paragraph (120-140 words) about typical problems typical problems of plastic injection moulding and explain causes and solutions to these problems

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Plastic injection moulding have 5 problem, here are each type of problem and their solution. Firstly, Short shot, this is a phenomenon in which the mold cavity cannot be completely filled by molten plastic, resulting in a portion where there is no plastic. Secondly, Void, this is a phenomenon when pocket of air is trapped within or close to the surface of an injection moulded prototype. Thirdly, Sink mark, this is a phenomenon in which the surface of the finished part has holes in the thicker area of the injection molded. Next, Air trap, this is a phenomenon when the air is trapped in the cavity to create bubbles in the part. Finally, Flash, this is phenomenon when excess plastic is present on the mold parting or ejector part

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Write a paragraph (120-140 words) to describe the following plastic moulding process using the diagram belowSuggested questions:

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Write a paragraph (120-140 words) to describe the following plastic moulding process using the diagram belowSuggested questions:

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What is the name of process?

How many steps are there in the process? What are they?

Describe each step.
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As you can see in the figure, this is the process of plastic injection mouding process. There are 7 steps in this process. Firstly, Pellets of plastic are fed from the hopper into a cylinder. Secondly, the pellets are pushed along the cylinder by a using a rotating screw, and heated. Thirdly, the screw stops rotating and then a ram in front of the screw moves straight forward. Next, the soft, warm plastic is pushed toward a nozzle by the ram. Beside, the soft plastic is injected through the nozzle into a shaped cavity between the two halves of a mould. After that, the plastic is cooled by the mould, and becomes hard inside the cavity. Finally, the mould opens and the cold, hard, solid plastic shape is ejected

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Write a paragraph (120-140 words) about basic information of plastic (qualities and uses of plastic) using the following suggested questions.

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Write a paragraph (120-140 words) about basic information of plastic (qualities and uses of plastic) using the following suggested questions.

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What is plastic?

What are the properties of plastic?

What could/ couldn’t people do with plastic in the past? What can/ can’t people do with plastic now? What is the future of plastic?

What are the advantages/ disadvantages of plastic?

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Plastic is synthetic materials that use polymers as a main ingredient plastic is able to be moulded or shaped to any forms. Plastic has been chosen for many items because it's versatile, lightweight, durable and some kinds of plastic are safe to recycle or contain food. Nowadays, manufacturers can mould plastic into a variety of complex shapes and it possible to replace components in engines. In the future, we can save money and increase efficiency by using smart plastic coating on manufacturing components. And plastic is so convenient like shopping plastic bags, lightweight, cheap for packaging and wrappings. It's durable and resistant to all kinds of adverse outside factors like heavy rain, storms. Plastic also have some disadvantages like hurt the environment when we burn it and some kinds is not biodegradable and can't recycled

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Make a short video (1 - 3 minutes) to a specific CAD program using the following suggested questions:

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Make a short video (1 - 3 minutes) to a specific CAD program using the following suggested questions:

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Make a short video (1 - 3 minutes) to a specific CAD program

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Make a short video (1 - 3 minutes) to compare CAD and manual drafting using the suggested questions below:

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Make a short video (1 - 3 minutes) to compare CAD and manual drafting using the suggested questions below:

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What is CAD and manual drafting?

Compare CAD and manual drafting (functions, advantages and disadvantages)

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Make a short video (1 - 3 minutes) to compare CAD and manual drafting

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Make a video (1-3 minutes) to compare two types of drives using the suggested questions below

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Make a video (1-3 minutes) to compare two types of drives using the suggested questions below

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Make a video (1-3 minutes) to compare two types of drives

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Make a video (1-3 minutes) to talk about different types of gears using the following suggested questions.

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Make a video (1-3 minutes) to talk about different types of gears using the following suggested questions.

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Make a video (1-3 minutes) to talk about different types of gears

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Make a video to talk about different kinds of bearings

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Make a video to talk about different kinds of bearings

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How many kinds of bearings do you know?

What are they used for?

What are their components?

What are their main features?

What are their applications?

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Make a video (1-3 minutes) to talk about different kinds of bearings

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Make a video (1-3 minutes) to talk about different kinds of couplings using the following suggested questions

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Make a video (1-3 minutes) to talk about different kinds of couplings using the following suggested questions

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How many kinds of couplings do you know?
What are they used for?
What are their components?What are their main features?
What are their applications?

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Make a video to talk about different kinds of couplings

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Look at the diagram, write the manufaturing process of a check valve (120 - 140 words).Use some useful languages of sequence and the time clause when, as, before…… as followed.

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Look at the diagram, write the manufaturing process of a check valve (120 - 140 words).Use some useful languages of sequence and the time clause when, as, before…… as followed.

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There are six steps you need to follow when manufacturing a valve is made of cast iron.the first step is casting . In this stage means that hot liquid cast iron is poured into a container and cooled to make the correct shape . The second  step is turning.third , it is drilling. In this step, holes are made using a drill. Next, it is painting. In this stage, a surface is covered with paint.after the painting process,the next step  is punching .in this step holes are punched in  cast iron.the final step is inspection.in this step , a product is checked carefully. This is when we make sure that the part is made properly

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Write a paragraph (120 - 140 words) to describe a specific CAD program using the following suggested questions

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Write a paragraph (120 - 140 words) to describe a specific CAD program using the following suggested questions

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What is the name of the CAD program?

What are its features?

What are its functions?

What are its advantages and disadvantages?
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As far as i know, NX was released for the first time in 1973. It's simple, useful and powerful software. NX is used in aerospace and automotive companies. Using NX, designers can have many function. First, this software can drawings 2-D or 3-D models and edit data, link data from various source. NX have view the object from any angle, even from the inside looking out and NX is used to create preliminary design and layouts. There are a lot of pros of using NX to design like fast and flexible. It's can create a very high level of control and reduce the companies mistakes and maximize productivity. This software track your product through every phase of the production cycle easily. It's required professional training before using it and focused more on the layout of icons.

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Write a paragraph (120 - 140 words) to compare CAD and manual drafting using the suggested questions below:

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Write a paragraph (120 - 140 words) to compare CAD and manual drafting using the suggested questions below:

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What is CAD and manual drafting?

Compare CAD and manual drafting (functions, advantages and disadvantages)
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I would like to compare cad and manual drafting. Manual drafting is the practice of creating drawings by hand with pencil or ink on a media such as paper using drafting equipment.The problems of the manual drafting are these drawings are difficult to change or modify.we’ll be easy to misread because of ambiguity and drawing errors.And of course, this way will take a lot of time.Now we'll talk about CAD. Designing and changing models with cad are faster and easier than using traditional drafting. With CAD, designer don't need use paper to put their ideas solid shapes. CAD can product either 2D or 3D diagrams. CAD has the capability to generate the detailed drawings needed to start product manufacturing. Using CAD help reduce design time by allowing precise simulation rather than build and test physical prototypes. So, using CAD help save time, money and increase accuracy, efficiency. That's all about compare CAD and manual drafting.

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Write a paragraph (120 - 140 words) about different types of gears using the following suggested questions.

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Write a paragraph (120 - 140 words) about different types of gears using the following suggested questions.

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What is a gear?

What are its functions?

How many common types of gears are there? What are they?

What are their features?

What are their applications?
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A gear is a rotating circular machine part having cut teeth, which mesh with another toothed part to transmit torque and speed. There are 5 types of gears: spur gear, rack and pinion, helical gear, bevel gears and worm gears. The fist, Spur gear is the simplest type of gear they has teeth projocting towards or away from the centre. It is used in low-speed applications, as it cannot control noise at high speed. The next, helical gear is similar to spur gear except that their teeth are cut in a spiral shape. It is used in high-speed applications, large power strasmission because it can control noise. Then, bevel gear is a gear that has a conical from to transmit rotational power through shafts at an angle, normally. Moreover, worm and worm gear is type of gears with put one continuous tooth. It pais with a worm gear to reduce speed. Finally, rack and pinion gear consist of a circular gear engaing a linear gear. It is used to covert rotational motion into linear motion.

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Make a short video (1-3 minutes) following the situation below.

Situation: Your friend is going to make his/her first presentation in English. He/ She asks for advice. Make a short talk to show him/ her how to make an effective presentation using the following suggested questions:

What is the basic structure of a presentation?

What should you do before the presentation?

What should and shouldn’t you do during the presentation?

What should and shouldn’t you do after the presentation?

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Unit 1: Write a paragraph (120- 140 words) about how to make an effective presentation using the following suggested questions:

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Unit 1: Write a paragraph (120- 140 words) about how to make an effective presentation using the following suggested questions:

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What is the basic structure of a presentation?
What should you do before the presentation?
What should and shouldn’t you do during the presentation?What should and shouldn’t you do after the presentation?
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I think a presentation consisting of sections: greeting the audience, introducing speaker, expressing the purpose, giving the structure, giving the timing and handling questions. Before the presentation you should prepare the presentation well and turn off the phone. During the presentation you should dress well, communicate with the audience, use gestures during the presentation. You shouldn’t only read in the document. After the presentation you need to acknowledge everyone's opinions and say thank you at the end of the presentation.

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Write a paragraph (120 - 140 words) about different types of gears using the following suggested questions.

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Write a paragraph (120 - 140 words) about different types of gears using the following suggested questions.

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How many kinds of bearings do you know?

What are they used for?

What are their components?

What are their main features?

What are their applications?

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A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. There are two main parts: Rolling contact bearing and Journal bearing. The function of rolling contact  bearings is to support loads. It includes 3 main parts: roller, inner race which is used to rotate with the shaftand outer race which  is used to remain stable relative to the shaft) . Journal bearings has no rolling parts,it is a type of bearing that uses a lubricated sleeve. Rolling contact bearings has 4 main parts : Ball bearings, Straight roller bearings, tapered roller bearings, Thrust roller bearings. Ball bearing uses a spherical rolle .The function of it is used to support radial. Straight roller bearings use a cylindrical. it is used to support radial motion. Tapered roller bearing uses conical roller. It is used to support radial force and moderate thrust forces Thrust roller bearingusea a barrel - shaped roller which  is used tosupport thrust motion.Bearings are widely used in heavy industry such as forklifts, machinery, production tools.

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Write a paragraph (120 - 140 words) to compare two types of drives using the suggested questions below

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Write a paragraph (120 - 140 words) to compare two types of drives using the suggested questions below

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What are two types of drives?

What are the functions of each type?

What are the differences between them (materials, operation, slippage, efficiency, maintenance, etc.)?

What are some applications of each type?
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I know two types of drives. They are flat belt drives and Chains belt drives. Belt drive is one type of mechanical drive where motion and power are transferred from one shaft to another by means of friction between belt and pulleys mounted on each shaft. On the contrary, chain drive is one engagement type power transmission system that transmits motion and power by mains of successive chain with sprocket special toothed wheels. Chain is drive is most often made of metal, while belt is often rubber, plastic, urethane or other substances. Applications of open belt drive are flour mills, coolant, lubricant pump, AC,CAM shaft, alternator, lather machines and a lot of  other machines, belt conveyors, etc. Chain drive is used in bicycle, motorcycles and textile machinery.

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Write a short paragraph (120-140 words) about different kinds of couplings using the following suggested questions.

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Write a short paragraph (120-140 words) about different kinds of couplings using the following suggested questions.

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How many kinds of couplings do you know?

What are they used for?
What are their components?
What are their main features?
What are their applications?
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I will write about some couplings. The functions of couplings are to connect shafts together to transmit power and disconnect shafts for maintenance easily. There are two types of couplings including flexible couplings and rigids couplings. Beam coupling is a typical of flexible coupling and sleeve-style coupling is the most common rigid coupling. Beam coupling is used when there is a slight misalignment, it can accommodate several degrees of shaft offset. The features of beam coupling is that it is cut in a spiral shape  to reduce noise and unwanted vibration. The next, sleeve style coupling is used to maximize performance and efficiency of the machine and reduce wear on machine.