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

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?

The maintenance schedule for machine tools is crucial to ensure their optimal performance and longevity. Let's take the XYZ-5000 CNC milling machine as an example. This advanced machine tool is equipped with a high-speed spindle, precise control system, and robust construction, enabling it to perform tasks such as milling, drilling, and contouring with exceptional accuracy. The maintenance work for the XYZ-5000 includes daily, weekly, monthly, and annual tasks. Daily maintenance involves cleaning the machine, checking coolant levels, and inspecting tool holders for wear. Weekly maintenance includes lubrication of moving parts and inspection of spindle bearings. Monthly maintenance entails checking backlash and squareness, while annual maintenance involves a comprehensive inspection, calibration, and replacement of worn components. Carrying out these maintenance tasks is essential to prevent breakdowns, minimize downtime, optimize cutting performance, and extend the machine's lifespan. Moreover, regular maintenance ensures the safety of operators and reduces the overall operating costs by preventing major repairs or replacements.

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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.

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?

The machine tool under consideration is a lathe, a versatile piece of equipment used for turning, facing, threading, and other machining operations. The lathe's features include a spindle, cutting tools, and a workholding device, enabling it to shape various materials with precision. To ensure its smooth operation and longevity, a maintenance schedule is recommended. Daily maintenance tasks for the lathe include checking water line pressure gauges, air pressure, warming the lip spindle at low speed for five minutes, and cleaning the chip filter. Weekly maintenance involves inspecting all filters, checking coolant levels, inspecting oil grease, and topping up oil levels. Semi-annually, it is crucial to inspect spindle bearings, drive belts, and change/inspect oil. Carrying out these maintenance tasks is necessary to identify and rectify any issues promptly, prevent excessive wear and tear, ensure optimal performance, and extend the lifespan of the lathe machine.

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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

Plastic is a versatile and widely used synthetic material that has revolutionized various industries and everyday life. It is categorized into seven types based on their chemical composition and physical properties, with each type assigned a specific code for identification. One common type of plastic is polyethylene terephthalate (PET), labeled with the code "1." PET is known for its transparency, lightweight nature, and excellent resistance to moisture and chemicals. It is commonly used for making beverage bottles, food containers, and polyester fibers for textiles. PET's properties make it suitable for packaging applications, as it provides a barrier against contaminants and retains the freshness of the contents. Its recyclability also contributes to its popularity. Overall, plastic, including PET, offers convenience, durability, and versatility in various industries, but responsible consumption and proper waste management are crucial to mitigate its environmental impact.

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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.

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?

Plastic is a synthetic material primarily derived from petrochemicals, and it has become an integral part of our modern lives. Its versatility and low cost make it highly desirable for various applications. Plastic possesses several key properties, including durability, lightweight nature, and resistance to moisture, chemicals, and degradation. In the past, people were limited in their ability to manipulate plastic and had fewer options for its utilization. However, advancements in technology have expanded the range of possibilities. Today, plastic is used extensively in industries such as packaging, construction, automotive, and electronics. It plays a crucial role in our daily lives, from food storage to medical equipment. However, the overuse and improper disposal of plastic have led to significant environmental concerns, including pollution and harm to wildlife. The future of plastic lies in finding sustainable alternatives and implementing effective recycling and waste management systems. While plastic offers convenience and functionality, its drawbacks highlight the need for responsible consumption and eco-friendly solutions.

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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.

This is the process of injection moulding of plastic. There are six steps in the process. First, plastic pellets are fed from the hopper into a cylinder. Then, the pellets are pushed along the cylinder by a rotating screw and heated to molten plastic. After that, the soft, warm plastic is pushed toward a nozzle by the ram. The fourth step is soft plastic injected through the nozzle into a shaped cavity between the two halves of a mould. Next, the plastic is cooled by the mould and becomes hard inside the hole. Finally, the mould opens and the plastic product is ejected.

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

Suggested questions:

What is the name of process?

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

Describe each step.

The plastic moulding process depicted in the diagram is known as injection moulding, a widely used manufacturing technique for producing plastic parts. The process consists of several steps. Firstly, raw plastic material in the form of pellets is fed into a hopper. The pellets are then heated and melted in a cylindrical chamber known as the barrel. Once the plastic is in a molten state, it is injected into a mould cavity through a nozzle and runner system. The mould, which is typically made of steel, is designed to shape the plastic into the desired form. After injecting the molten plastic, it is allowed to cool and solidify within the mould cavity. Finally, the mould is opened, and the solidified plastic part is ejected, completing the process. Injection moulding offers high production efficiency, precision, and versatility, making it a preferred method for mass-producing plastic components in various industries.

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My manufacturing process is the ABCD project which produces the car wheel. The car wheels are made from sheet steel. There are five steps in the project, it included punching, pressing, welting, bolting, and inspection. The first step is punching. In this step, holes are punched in the sheet steel. Next step, the steel is formed to shape by pressing. The material is turned on the machine called a lathe. A part of the materials is removed to make the correct shape. After, they are joined together using high temperatures. Then it is covered with paint. Finally, the item is checked carefully after selling.

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It is include 6 steps.

The first step is selecting materials and casting, casting means hot liquid material is poured into a container and cooled to make the correct shape.

The second process is turning. In this step, product are turned on a machine called a lathe. Part of materials is removed to make the correct shape.

Next, holes are made using a drill. It is called drilling step.

After drilling process, the next step is gear cutting, This step is to create the teeth of the gear.

And then, the gears are heat treated and grind before testing

Finally, the engineer will check the check valve carefull to make sure the product don’t have any problem.

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The check valve is made of cast iron. In the first step, the hot liquid metal is poured into the container and cooled to make the correct shape. In the second step, The cast iron is turned on the machine by lathe, and then a part of it is removed to make the correct shape. After that, the material is joined together by nuts and bolts. In the next step, the material is covered with paint. Finally, The worker or inspector will check the cast iron. If the material is good, it will be done. 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.

What is the name of the CAD program?

What are its features?

What are its functions?

What are its advantages and disadvantages?

One widely used CAD program is AutoCAD. It offers essential features for designing and drafting. AutoCAD allows users to create 2D and 3D models and generate detailed technical drawings. Its advantages include precise drafting tools, customizable workflows, and support for various file formats. Users can easily collaborate and share designs. AutoCAD's functions encompass creating geometric shapes, applying dimensions and annotations, generating sections and elevations, and performing simulations and analyses. However, AutoCAD's learning curve and system requirements can be challenging for beginners. Additionally, it can be costly, especially for individual users or small businesses. Despite these drawbacks, AutoCAD remains a powerful and comprehensive CAD program widely used by professionals in different industries.

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

What is CAD and manual drafting?

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

CAD is a digital design tool, while manual drafting is the process of creating hand-drawn drawings using traditional tools such as pencils, rulers, and drawing boards.

When comparing CAD and manual drafting, CAD has several advantages. It allows for quick drawing and editing with just a few mouse clicks. CAD also provides higher precision and accuracy as it can snap to gridlines and measurements. Additionally, CAD allows for 3D modeling and simulations, enabling designers to visualize and test designs before implementation. However, CAD requires computer skills and software investment.

Manual drafting also has its own benefits. It is not dependent on technology or software, making it more accessible and cost-effective. Manual drafting offers a hands-on experience and encourages creativity. However, it is time-consuming, prone to errors, and modifications require redrawing.

In summary, CAD offers speed, precision, and advanced features, but requires computer skills and software investment. Manual drafting is accessible, familiar, and cost-effective, but lacks the efficiency and accuracy of CAD. The choice between the two methods depends on specific needs, available resources, budget, and personal preferences of the designer.

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

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?

Two basic types of drives are belt drives and chain drives. Belt drives function by using a belt made of materials like rubber or synthetic fibers to transmit power between two pulleys. They are commonly used in applications that require smooth and quiet operation, such as in appliances, automotive engines, and industrial machinery. On the other hand, chain drives use a chain made of metal links to transfer power. They are known for their strength and durability, making them suitable for heavy-duty applications like motorcycles, bicycles, and industrial equipment. Unlike belt drives, chain drives provide a direct and efficient power transmission without slippage. However, chain drives require regular lubrication and maintenance to ensure smooth operation and prevent wear. Overall, belt drives are preferred for lighter loads and applications that prioritize noise reduction, while chain drives are chosen for heavy-duty tasks that require robust power transmission.

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

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 couplings using the following suggested questions.

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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A gear is a mechanical component consisting of toothed wheels that work together to transmit motion and power. Its primary function is to change the speed, direction, and torque of rotational motion. The most common type of gear is the spur gear, which has straight teeth parallel to the axis of rotation. Spur gears are widely used in machinery and vehicles due to their simplicity and efficiency. Another type is the helical gear, which features angled teeth that engage gradually, resulting in smoother and quieter operation. Bevel gears have teeth cut on a cone-shaped surface and are used to transmit motion between intersecting shafts. Worm gears, on the other hand, consist of a screw-like gear (worm) and a wheel, providing high gear reduction ratios. Gears find applications in various fields, including automotive transmissions, industrial machinery, watches, and bicycles, among others.

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Write a paragraph (120- 140 words) about 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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Write a paragraph (120- 140 words) about 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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An effective presentation follows a simple structure. Firstly, start with an interesting introduction to grab the audience's attention. Then, outline the main points and objectives of the presentation. Next, present the information clearly and support it with relevant visuals or examples. Finally, conclude the presentation by summarizing the key points and leaving a lasting impression on the audience. Before the presentation, it's important to researching the topic, organizing the content logically, and practicing the delivery to ensure a smooth flow. During the presentation, maintain eye contact, speak clearly and confidently, and use body language, avoid reading directly from the slides and interact with people . After the presentation, answer any questions, provide additional resources if needed, and ask for feedback to improve future presentations. thank the audience for their time and attention. Avoid rushing off immediately.

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

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?

There are a few basic types of bearings commonly used in various applications. Ball bearings are widely used and consist of small metal balls that roll between two smooth surfaces to reduce friction and enable smooth rotation. They are commonly used in applications with moderate speeds and radial loads. Roller bearings, as the name suggests, use cylindrical or tapered rollers to distribute the load evenly and handle higher loads and forces. They are suitable for applications with both radial and axial loads. Plain bearings, also known as bushings or sleeve bearings, have a simple design with a sliding surface between the bearing and shaft. They provide low friction and are commonly used in applications with slow speeds and oscillating or linear motion. Bearings are essential components in many industries, including automotive, manufacturing, aerospace, and machinery, enabling smooth and efficient movement in various mechanical systems.

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Write a short paragraph  (120-140 words) about different kinds of couplings using the following suggested questions.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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Write a short paragraph  (120-140 words) about different kinds of couplings using the following suggested questions.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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There are a few basic types of couplings commonly used in various applications. Rigid couplings are simple and sturdy, designed to connect two shafts in a straight line with minimal flexibility. They are often used when precise alignment and torque transmission are crucial. Flexible couplings, on the other hand, allow for some degree of misalignment between shafts and can absorb shock and vibration. They are versatile and commonly used in applications where flexibility is required. Some examples include elastomeric couplings and grid couplings. Another basic type is the fluid coupling, which uses hydraulic fluid to transmit power. Fluid couplings provide smooth starts and torque control, making them suitable for applications such as conveyors and pumps. Each type of coupling has its own unique features and applications, catering to different needs in various industries.

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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?