Đề thi tiếng anh chuyên nghành điện tử viễn thông 30

Test: English For telecommunications Test 1 Time: 90 minutes - Do not use dictionary I.. Write complete sentences using the suggested words or phrases... Test: English For telecommunica

Name: Ngày sinh

Class: Mã sinh viên

Test: English For telecommunications Test 1 (Time: 90 minutes - Do not use dictionary)

I Answer the questions, basing on the passage

Telephones: Wires and Cables

A modern telephone often includes a bell so it can ring and a keypad and frequency generator There is an electronic microphone, amplifier and circuit The mechanical bell is often replaced by a speaker and a circuit to generate a pleasant ringing tone But a regular telephone remains one of the simplest devices ever

The telephone network starts in your house A pair of copper wires runs from a box at the road to a box at your house From there, the pair of wires is connected to each phone jack in your house (usually using red and green wires) If your house has two phone lines, then two separate pairs of copper wires run from the road to your house The second pair is usually colored yellow and black inside your house

Along the road runs a thick cable packed with 100 or more copper pairs Depending on where you are located, this thick cable will run directly to the phone company's switch in your area or it will run to a box about the size of a refrigerator that acts as a digital concentrator

5 How large is a digital concentrator?

II Translate the passage into Vietnamese (A modern telephone… red and green wires)

III Write complete sentences using the suggested words or phrases 1 There / three major entities / provision / Internet service

2 basic purpose / provide / means / synchronous data transmission

3 Telecommunication / be / transmission / signals over / distance for / purpose/ communication

4 Where line networks / set up / can be / classified / indoor and outdoor

5 Bell / make / lot / inventions / but / telephone / most important

IV Translate the following sentences into English 1 Trong thông tin quang, các tín hiệu điện được biến đổi thành các xung ánh sáng

2 Cáp kim loại có thể sử dụng cho cả hai loại kênh thoại - tương tự và số

3 Các trạm lặp đầu cuối có thể được đặt trong trạm mặt đất hay các tổng đài chuyển tiếp

4 Trước đây lưu lượng truyền trên mạng Internet chủ yếu là thông tin trên cơ sở văn bản

5 Mạng LAN đặc biệt hữu dụng trong các công ty, trường đại học…

V Write about the importance and usefulness of Internet services (about 100 words)

Name: Ngày sinh

Class: Mã sinh viên

Test: English For telecommunications Test 2 (Time: 90 minutes - Do not use dictionary)

I Answer the questions, basing on the passage

What is a Satellite?

A satellite is basically any object that revolves around a planet The moon is Earth's original, natural satellite, and there are many artificial satellites, usually closer

to Earth

• The path a satellite follows is an orbit In the orbit, the farthest point from Earth

is the apogee, and the nearest point is the perigee

built Yet, the GPS satellites (with over 20 copies in orbit) and the Iridium satellites (with over 60 copies in orbit)

actual number varies depending on which agency is counting This online catalog of satellites has almost 26,000 entries!

Although anything that is in orbit around Earth is technically a satellite, the term

"satellite" is typically used to describe a useful object placed in orbit to perform some specific task We often hear about weather satellites, communication satellites and scientific satellites

New words: - perigee: cận điểm, điểm gần trái đất nhất

- artificial: nhân tạo - apogee: điểm xa trái đất nhất

- space junk: những vật thể bay trong vũ trụ

5 Give one example of artificial satellites

II Translate the passage into Vietnamese (A satellite is basically … 60 copies in orbit)

III Write complete sentences using the suggested words or phrases 1 quality / speech transmitted /by satellite / good

2 technique used / exchange / be / space division switching

3 data network / consist / number / components /which / interconnected

4 Today/ telecommunication devices / such as / television / radio / telephone / be / common / many parts / world

5 Voice communications / seldom / carried by / geosynchronous satellites

IV Translate the following sentences into English 1 Các nhà cung cấp dịch vụ cung cấp truy cập Internet

2 Nhiệm vụ của hệ thống chuyển mạch là để thiết lập một kênh tạm thời giữa người gọi và thuê bao được gọi

3 Viễn thông đóng một vai trò quan trọng trong nền kinh tế thế giới

4 Nguồn sáng có thể là đi ốt phát quang hay laser

5 Một trong những cách phân lọai cáp thông tin là theo chất liệu

V Write about the history of telephone exchanges (about 100 words)

Name: Ngày sinh

Class: Mã sinh viên

Test: English For telecommunications Test 3 (Time: 90 minutes - Do not use dictionary)

I Answer the questions, basing on the passage

Perhaps the telephone you have in your house is one of the most amazing devices ever created If you want to talk to someone, all you have to do is pick up the phone and dial a few digits You are instantly connected to that person, and you can have a two-way conversation The telephone network extends worldwide, so you can reach nearly anyone on the planet When you compare that to the state of the world just 100 years ago, when it might take several weeks to get a one-way written message to someone, you realize just how amazing the telephone is!

Surprisingly, a telephone is one of the simplest devices you have in your house It

is so simple because the telephone connection to your house has not changed in nearly

a century If you have an antique phone from the 1920s, you could connect it to the wall jack in your house and it would work fine!

The very simplest working telephone could only contain three parts and they are all simple:

generally called the hook switch It connects when you lift the handset

• A speaker - This is generally a little speaker

granules compressed between two thin metal plates

New words: - granules: những hạt nhỏ

III Write complete sentences using the suggested words or phrases 1 Cellular communications service / systems / be design / serve mobile users

2 Stored Program Control / application / data processing and computer techniques / exchange

3 concentrator / be / to collect traffic / a number / individual subscriber circuits

4 Computer communication / across / Internet / be one / many examples / telecommunication

5 Electronic systems / installed / 1870s

IV Translate the following sentences into English 1 Nói chung các hệ thống viễn thông do các kỹ sư viễn thông thiết kế

2 Trong thông tin quang, có hai loại bộ tách quang: đi ốt quang pin và đi ốt quang thác

3 Các linh kiện được gắn trên bản mạch in và nếu có lỗi, bản mạch in có thể được tháo ra và thay bằng một bản khác trong vòng vài giây

4 Cáp quang có nhiều ưu điểm so với cáp đồng thông thường

5 Điều xung mã là quá trình trong đó tín hiệu điện thọai tương tự được biến đổi thành tín hiệu số

V Write about some advantages of optical fibers (about 100 words)

Name: Ngày sinh

Class: Mã sinh viên

Test: English For telecommunications Test 4 (Time: 90 minutes - Do not use dictionary)

I Answer the questions, basing on the passage

The basic elements of a telecommunication system are:

• a transmitter that takes information and converts it to a signal for transmission

• a transmission medium over which the signal is transmitted

• a receiver that receives and converts the signal back into usable information

For example, consider a radio broadcast In this case the broadcast tower is the transmitter, the radio is the receiver and the transmission medium is free space Often telecommunication systems are two-way and devices act as both a transmitter and

receiver or transceiver For example, a mobile phone is a transceiver

Telecommunication over a phone line is called point-to-point communication because it

is between one transmitter and one receiver, telecommunication through radio broadcasts is called broadcast communication because it is between one powerful transmitter and numerous receivers

Signals can either be analogue or digital In an analogue signal, the signal is varied continuously with respect to the information In a digital signal, the information

is encoded as a set of discrete values (e.g 1's and 0's)

Telecommunications devices convert different types of information, such as sound and video, into electrical or optical signals Electrical signals typically travel along a medium such as copper wire or are carried over the air as radio waves Optical signals typically travel along a medium such as glass fibers When a signal reaches its destination, the device on the receiving end converts the signal back into an understandable message, such as sound over a telephone, moving images on a television, or words and pictures on a computer screen

II Translate the passage into Vietnamese (Telecommunications devices on a computer screen.)

III Write complete sentences using the suggested words or phrases 1 a number / technologies / been introduced / provide faster data speeds

2 shaping / signal / convey information / known / modulation

3 data terminal equipment / provide / subscribers / data reception facilities

4 Bluetooth / use / phase-shift keying / for exchanges / between devices

5 most important type / satellite / telecommunications / geostationary satellite

IV Translate the following sentences into English 1 Mạng số có thể cung cấp cho người sử dụng chất lượng dịch vụ cao hơn nhiều so với trước đây

2 Các thiết bị quang thác thường nhạy hơn nhưng chúng cũng đắt hơn so với điốt quang pin

3 Đồng thời, điều chế còn được sử dụng để khuyếch đại tần số của tín hiệu tương tự

4 Hiện nay, các dịch vụ viễn thông hữu tuyến bao gồm việc truyền toàn bộ các thể loại chủ yếu là qua mạng Internet

5 Cáp quang đem lại dung lượng truyền lớn hơn, tốc độ nhanh hơn so với cáp đồng

V Write about the usefulness of computers (about100 words)

Name: Ngày sinh

Class: Mã sinh viên

Test: English For telecommunications Test 5 (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage A collection of transmitters, receivers or transceivers that communicate with each other is known as a network Digital networks may consist of one or more routers that route data to the correct user An analogue network may consist of one or more switches that establish a connection between two or more users For both types of network, a repeater may be necessary to amplify or recreate the signal when it is being transmitted over long distances This is to combat attenuation that can render the signal indistinguishable from noise A channel is a division in a transmission medium so that it can be used to send multiple independent streams of data For example, a radio station may broadcast at 96 MHz while another radio station may broadcast at 94.5 MHz In this case the medium has been divided by frequency and each channel received a separate frequency to broadcast on Questions: 1 What is a network?

2 What does a repeater do?

3 Why does it do so?

4 Give the definition of a channel?

5 What is the medium that radio stations broadcast divided by?

II Translate the passage into Vietnamese (A collection … from noise)

III Write complete sentences using the suggested words or phrases 1 Internet service provider / view / access / connection / from its customer / network

2 data switching exchange / control / set-up / clear-down / data calls

3 Many / the world's telecommunications administration / explored / digital solutions

4 Modulation / key concept / telecommunications

5 A raw signal / often not suitable / transmission / long distances / free space

IV Translate the following sentences into English 1 Tổng đài analog lắp đặt và bảo dưỡng thì tốn kém và có những lỗi như xuyên âm, can nhiễu và sai số

2 Một trong những ưu điểm của sợi quang là chất liệu nhẹ và linh hoạt

3 Để giảm số cáp, mạng nội hạt thường được phân chia thành ba phần

4 Việc truyền dẫn sử dụng các tuyến nối vệ tinh có chất lượng rất cao và ít có trục trặc

5 Các dịch vụ điện thoại di động đã được đưa vào sử dụng năm nào?

V Write about your learning technical English (about 100 words)

Name: Ngày sinh

Class: Mã sinh viên

Test: English For telecommunications Test 6 (Time: 90 minutes - Do not use dictionary)

I Answer the questions, basing on the passage

The first telephone exchange opened in New Haven, Connecticut in 1878 Later exchanges consisted of one to several hundred plug boards staffed by operators A

calling party (known as the subscriber), would lift the receiver, a light near the plug

would light, and the operator would switch into the circuit to ask, "number please?" Depending upon the answer, the operator might plug the plug into a local jack and start the ringing cycle, or plug into an other circuit to start what might be a long distance call handled by subsequent operators in another building miles away

In 1918 the average time to complete a long-distance call was 15 minutes In the ringdown method, the originating operator called another intermediate operator who would call the called subscriber, or passed it on to another intermediate operator This chain of intermediate operators could complete the call only if all of the intermediate trunk lines were available at the same time In 1943 when military calls had priority, a cross-country US call might take as long as 2 hours to request and schedule

New words: - staff: bố trí, sắp xếp - jack: jắc cắm

1 When and where did the first telephone exchange open?