Tiếng anh chuyên nghành Điện Tử Viễn Thông

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III. Write complete sentences using the suggested words or phrases. 1. Why / Strowger / invent / automatic telephone exchange? ............................................................................................................................ 2. In 1948 / transistor / invention Bell Telephone Laboratories . ............................................................................................................................ 3. Transmission characteristics / satellite links / excellent / and problems / few. ............................................................................................................................ ............................................................................................................................. 4. There / two secondary centre/ connected / DSC / in Sisley / radio link. ........................................................................................................................... ............................................................................................................................ 5. Radar systems / also enable / air-traffic controllers / follow / guide / flight paths / planes / take-off / land. ............................................................................................................................ ............................................................................................................................ IV. Translate the following sentences into English. 1. Loại vệ tinh quan trọng nhất cho viễn thông là vệ tinh vệ tinh địa tĩnh. 18 ............................................................................................................................ 2. Rất nhiều công ty, tập đoàn và cá nhân đã sử dụng Internet trong thông tin liên lạc. ............................................................................................................................ ............................................................................................................................ 3. Giá của vệ tinh bắt đầu giảm, và kết quả là vệ tinh bắt đầu cạnh tranh với cáp ngầm dưới biển. ............................................................................................................................ ............................................................................................................................ 4. Thiết bị thu tín hiệu, khuyếch đại, đổi tần số và sau đó phát lại được gọi là thiết bị phát đáp. ............................................................................................................................ ............................................................................................................................ 5. Trong giải pháp này, đường dây nối giữa các bộ tập trung kênh và tủ cáp sử dụng kỹ thuật số. ............................................................................................................................ ............................................................................................................................ V. Write about the importance of English in your life and work. (about 100 words). ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... 19 Name: ............................................................ Ngày sinh ............................... Class: ............................................................. Mã sinh viên .............................. Test: English For telecommunications Test 7 (Time: 90 minutes - Do not use dictionary) I. Answer the questions, basing on the passage. Advantages of Fiber Optics Why are fiber-optic systems revolutionizing telecommunications? Here are some advantages of optical fibers in comparison to conventional metal wire (copper wire): • Less expensive - Several miles of optical cable can be made cheaper than equivalent lengths of copper wire. This saves your provider (cable TV, Internet) and you money. • Thinner - Optical fibers can be drawn to smaller diameters than copper wire. • Higher carrying capacity - Because optical fibers are thinner than copper wires, more fibers can be bundled into a given-diameter cable than copper wires. • Less signal fading - The loss of signal in optical fiber is less than in copper wire. • Light signals - Unlike electrical signals in copper wires, light signals from one fiber do not interfere with those of other fibers in the same cable. This means clearer phone conversations or TV reception. • Low power - lower-power transmitters can be used instead of the high-voltage electrical transmitters needed for copper wires. • Digital signals - Optical fibers are ideally suited for carrying digital information, which is especially useful in computer networks. • Non-flammable - Because no electricity is passed through optical fibers, there is no fire hazard. • Lightweight - An optical cable weighs less than a comparable copper wire cable. Fiber-optic cables take up less space in the ground. • Flexible - Fiber optics are so flexible and can transmit and receive light. Questions: 1. Why are fiber-optic systems revolutionizing telecommunications? ............................................................................................................................ 2. Which can be drawn to smaller diameters? ............................................................................................................................ 3. Why can more fibers be bundled into a given-diameter cable? ............................................................................................................................ 4. Why are they non-flammable? ............................................................................................................................ 5. Why do optical fibers offer clearer phone conversations or TV reception? 20 ............................................................................................................................ II. Translate the passage into Vietnamese. (Why are fiber-optic systems … given- diameter cable than copper wires.) ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... III. Write complete sentences using the suggested words or phrases. 1. Several factors/ will influence / future developments / VoIP / products / services. ............................................................................................................................ 2. Call charge / mean / cost / telephone call. ............................................................................................................................ 3. 109 nation/ member/ of INTELSAT. ............................................................................................................................ 4. In analogue line / sound / amplified / regular intervals. 21 ............................................................................................................................ 5. What / remote data processing mean? ............................................................................................................................ IV. Translate the following sentences into English. 1. Việc phát triển, sản xuất và phóng một vệ tinh rất tốn kém. ............................................................................................................................ 2. Sai số có nghĩa là cuộc gọi có thể được định tuyến sai. ............................................................................................................................ 3. Trong chương trình kiểm tra lỗi chính tả, nếu các lỗi hay từ mới được phát hiện, chúng sẽ được làm nổi bật trên màn hình. ........................................................................................................................... ............................................................................................................................ 4. Vệ tinh nhận, khuyếch đại và tái định hướng thông tin ta gửi lên cho nó. ............................................................................................................................ 5. Trong những năm gần đây, công nghệ viễn thông phát triển với tốc độ rất nhanh. ............................................................................................................................ ............................................................................................................................ V. Write about the role of telecommunications in society. (about 100 words). ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... 22 Name: ............................................................ Ngày sinh ............................... Class: ............................................................. Mã sinh viên .............................. Test: English For telecommunications Test 8 (Time: 90 minutes - Do not use dictionary) I. Answer the questions, basing on the passage. What are Fiber Optics? Fiber optics (optical fibers) are long, thin strands of very pure glass about the diameter of a human hair. They are arranged in bundles called optical cables and used to transmit light signals over long distances. If you look closely at a single optical fiber, you will see that it has the following parts: • Core – Thin glass center of the fiber where the light travels • Cladding – Outer optical material surrounding the core that reflects the light back into the core • Buffer coating – Plastic coating that protects the fiber from damage and moisture Hundreds or thousands of these optical fibers are arranged in bundles in optical cables. The bundles are protected by the cable’s outer covering, called a jacket. Optical fibers come in two types: • Single-mode fibers • Multi-mode fibers Single-mode fibers have small cores and transmit infrared laser light. Multi- mode fibers have larger cores and transmit infrared light from light-emitting diodes (LEDs). Some optical fibers can be made from plastic. These fibers have a large core and transmit visible red light. from LEDs. Because fiber optics have many advantages, you see fiber optics in many industries, most notably telecommunications and computer networks. For example, if you telephone Europe from the United States (or vice versa) and the signal is via a communications satellite, you often hear an echo on the line. But with transatlantic fiber-optic cables, you have a direct connection with no echoes. New words: - strand: sợi dây - bundle: bó - infrared: hồng ngoại - transatlantic: qua đại tây dương Questions: 1. What are optical fibers? ............................................................................................................................ 2. How many main parts are there in a single optical fiber? What are they? ............................................................................................................................ 3. What is the differences between single-mode fibers and multi-mode fibers? 23 ............................................................................................................................ 4. What are special about optical fibers that are made from plastic? ............................................................................................................................ 5. Why are fiber optics usec in many industries? ............................................................................................................................ II. Translate the passage into Vietnamese. (Fiber optics (optical fibers) ......... called a jacket.) ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... 24 III. Write complete sentences using the suggested words or phrases. 1. DGPT / planned / build / national communication infrastructure / meet/ following demands. ............................................................................................................................ ............................................................................................................................. 2. What / manual system / require /from operators? ............................................................................................................................ 3. digit / telephone exchanges / called / SPC (stored program control), exchanges. ............................................................................................................................ 4. What / speech / carried / digital switch / converted into? ............................................................................................................................ 5. In / solution, analogue transmission / only used / lines / concentrators / in / cabinets. ............................................................................................................................ ............................................................................................................................ IV. Translate the following sentences into English. 1. Ngày nay, các tổng đài SPC có các đặc điểm như dễ điều khiền thiết bị và cấu trúc linh hoạt. ............................................................................................................................ ............................................................................................................................ 2. Anh ta chịu trách nhiệm về dự án hiện đại hóa thiết bị của họ. ............................................................................................................................ ............................................................................................................................ 3. Thiết bị này có thể giúp khách hàng tiết kiệm chi phí nhiên liệu và đáp ứng nhu cầu của họ. ............................................................................................................................ ............................................................................................................................ 4. Một vệ tinh có thể xử lý một lượng thông tin lớn mà nó có thể gửi đi một vùng rộng lớn trên trái đất. ............................................................................................................................ ............................................................................................................................ 5. Mạng thuê bao được chia thành mạch thuê bao, mạch trung cấp và mạch sơ cấp. ............................................................................................................................ 25 V. Describe what you do in your work and mention the technical equipment you often usein your work . (about 100 words). ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... .................................................................................................................................... ... 26 Name: ............................................................ Ngày sinh ............................... Class: ............................................................. Mã sinh viên .............................. Test: English For telecommunications Test 9 (Time: 90 minutes - Do not use dictionary) I. Answer the questions, basing on the passage. Remote access The Internet allows computer users to connect to other computers and information stores easily, wherever they may be across the world. They may do this with or without the use of security technologies, depending on the requirements. This is encouraging new ways of working from home, collaboration and information sharing in many industries. An accountant sitting at home can audit the books of a company based in another country. Some of these examples were possible before the widespread use of the Internet, but the cost of private, leased lines would have been very high. An office worker away from his desk, perhaps the other side of the world on a business trip or a holiday, can “open” his normal office PC using a secure Virtual Private Network (VPN) connection via the Internet. This gives him complete access to all his normal files and data, including e-mail and other applications, while he is away. New words: - collaboration: sự cộng tác - accountant: nhân viên kế toán - audit: kiểm tra sổ sách - leased lines: kênh thuê riêng Questions: 1. What does the Internet allow computer users to do? ............................................................................................................................ 2. What is being encouraged by using Internet? ............................................................................................................................ 3. What was the disadvantage of private, leased lines? ............................................................................................................................ 4. Can an officer away from his desk “open” his normal office PC? ............................................................................................................................ 5. How can he do it? ............................................................................................................................ II. Translate the passage into Vietnamese. (This is encouraging ... while he is away.) ....................................................................................................................................... ....................................................................................................................................... 27 ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... III. Write complete sentences using the suggested words or phrases. 1. BASIC / developed / help students. ............................................................................................................................ 2. New / electronic exchange / just / be installed. ............................................................................................................................ 3. Strowger exchange / not / noisy as/ crossbar central office. ............................................................................................................................ 4. processor / central component / computer system. ............................................................................................................................ 5. Computers / can deal / different kinds / problems. ............................................................................................................................ IV. Translate the following sentences into English. 1. Những tổng đài điện thoại này hứa hẹn tốc độ chuyển mạch nhanh hơn. 28 ............................................................................................................................ 2. Chúng ta sử dụng sóng vô tuyến cho nhiều mục tiêu khác nhau. ............................................................................................................................ 3. Khi nào các ông sẽ lắp đặt hệ thống tổng đài mới. ............................................................................................................................ 4. Ngày nay có nhiều lĩnh vực sử dụng máy tính làm công cụ dạy học. ............................................................................................................................ 5. Chiếc vệ tinh được định vị trên đường xích đạo tại độ cao 35.800 km. ............................................................................................................................ V. What do you know about telecommunications services in Vietnam and how do you think to improve them. (about 100 words). ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... 29 Name: ............................................................ Ngày sinh ............................... Class: ............................................................. Mã sinh viên .............................. Test: English For telecommunications Test 10 (Time: 90 minutes - Do not use dictionary) I. Answer the questions, basing on the passage. Telecommunication is the transmission of signals over a distance for the purpose of communication. In modern times, this process almost always involves the sending of electromagnetic waves by electronic transmitters but in earlier years it may have used smoke signals, drums... Today, telecommunication is widespread and devices that assist the process, such as the television, radio and telephone, are common in many parts of the world. There is also vast networks that connect these devices, including computer networks, public telephone networks, radio networks and television networks. Computer communication across the Internet, such as e-mail and instant messaging, is just one of many examples of telecommunication. Telecommunication systems are generally designed by telecommunication engineers. Some of them are Alexander Bell who invented the telephone (as we know it), John Logie Baird who invented the mechanical television and Guglielmo Marconi who first demonstrated transatlantic radio communication. In recent times, optical fibre has improved the bandwidth available for intercontinental communication, helping to bring faster Internet services. Telecommunications is an important part of the world economy. New words: - drums: trống - transatlantic: qua đại tây dương - intercontinental: liên lục địa - vast: rộng lớn - mechanical Questions: 1. What is telecommunication? ............................................................................................................................ 2. What were used to communicate over a long distance in earlier years? ............................................................................................................................ 3. What are some networks that connect telecommunication devices? ............................................................................................................................ 4. Mention some telecommunication engineers and their inventions. ............................................................................................................................ 5. What has optical fibre improved? 30 ............................................................................................................................ II. Translate the passage into Vietnamese. (Telecommunication is the transmission........many examples of telecommunication.) ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... III. Write complete sentences using the suggested words or phrases. 1. Over / last few years /electromechanical exchanges / begin / disappear. ............................................................................................................................ 2. 1891, Almon Strowger / undertaker / Kansas / patented / Strowger switch. ............................................................................................................................ 3. What / capability / of / DSE? ............................................................................................................................ 4. subscriber / informed / cost / of / call / on / completion. ............................................................................................................................ 5. Optical fiber /signal fades less / so that / repeaters / can / more widely spaced. 31 ............................................................................................................................ IV. Translate the following sentences into English. 1. Vệ tinh quỹ đạo tầm thấp có ít tác dụng trong viễn thông. ............................................................................................................................ 2. DCE cung cấp giao diện chuẩn giữa DTE và mạng. ............................................................................................................................ 3. Thiết bị đầu cuối dữ liệu bao gồm những gì? ............................................................................................................................ 4. Điện thoại là phát minh quan trọng nhất của Graham Bell. ............................................................................................................................ 5. Cô có thể nối máy cho tôi tới ông Barker được không? ............................................................................................................................ V. A foreign investor want to know about your company / post office. You introduce it to him/ her.. (about 100 words). ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... ....................................................................................................................................... .......................................................................................................................................