đề thi tiếng anh cực hay

đề thi tiếng anh cực hay

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

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

2

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

• Artificial satellites generally are not produced a lot Most satellites are custom 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

- custom built: sản xuất theo đơn đặt hàng

- space junk: những vật thể bay trong vũ trụ

Questions:

1 What is a satellite basically?

- orbit: quỹ đạo

A satellite is basically any abject that revlves around aplanet

2 What do apogee and perigee mean?

The apogee is the farthest point from Earth

The perigee is the nearest point.

3 How many copies of Iridium satellites are there in orbit?

The are 60 copies in orbit.

4 What is the term "satellite" typically used to describe ?

The term "satellite" is typically used to describe a useful … 4

5 Give one example of artificial satellites.

Weather satellite, communication 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.

Quality of speech transmitted by satellite is good

2 technique used / exchange / be / space division switching

The technique used in this exchange is known as space division switching

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

The data network consist of a number of components which are interconnected.

4 Today/ telecommunication devices / such as / television / radio / telephone / be /

common / many parts / world

Today, telecommunication devices such as television radio and telephone are

5 Voice communications / seldom / carried by / geosynchronous satellites.

Voice communications is seldom carried by geosynchronous satellites

IV Translate the following sentences into English.

1 Các nhà cung cấp dịch vụ cung cấp truy cập Internet

The service provider provide to access 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

the task of switching systems is to establish a temporary channel between the

caller and called subscriber

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

Telecom play an important role in the world economy.

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

Light sources can be rather light emitting diodes of laser

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

One of the classified information cables is on the material

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

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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

granules compressed between two thin metal plates

New words: - granules: những hạt nhỏ

Questions:

1 What do you do with the telephone if you want to talk to someone?

All you have to do is pick up the phone and dial a few digits

2 In what way can you realize how amazing the telephone is?

When you compare that to the state of the world just 100 years ago.

3 How many parts could the very simplest working telephone contain?

The are three parts.

4 What does a switch do?

A switch to connect and disconnect the phone from the network.

5 Were telephone microphones in the past complicated:

.

II Translate the passage into Vietnamese.( Perhaps the telephone … the telephone is!)

III Write complete sentences using the suggested words or phrases

1 Cellular communications service / systems / be design / serve mobile users

Cellular communications service is systems being designed by serve mobile users.

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

Stored Program Control is the application of data processing and computer techniques to an exchange.

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

Concentrator is to collect traffic from a number of individual subscriber circuits.

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

telecommunication.

Computer communication across the Internet is one of many examples of

telecommunication.

5 Electronic systems / installed / 1870s

Electronic systems were installed in 1870s

IV Translate the following sentences into English.

1 Nói chung các hệ thống viễn thông do các kỹ sư viễn thông thiết kế.

Telecommunication systems generally designed by telecommunication engineers

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

In Fibre-optic communication, there are two types of photo detectors The silicon pin photodiode and the silicon avalan the photodiode

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

The components are mounted in the circuit and, if error, the circuit can be removed and replaced with other one in a few second.

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

Optical fibres have several advantages over conventional copper cables.

thành tín hiệu số.

Pulse code modulation is the process in which analogue signal is converted digital signal.

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

9

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

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.

Questions:

1 What are the basic elements of a telecommunication system

A transmitter, a transmission, a receiver

2 Why is telecommunication over a phone line called point-to-point

communication?

Because it is between one transmitter and me receiver

3 How is the information encoded in a digital signal?

In digital signal, the information is encoded as a set of discrete values.

4 How do electrical signals typically travel?

They typically travel a long… as tradio waver.

5 What does the device on the receiving end do to the signal?

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The device on the receiving … on 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.

A number of technologies have been introduced to provide faster data speeds.

2 shaping / signal / convey information / known / modulation

Shaping of signal convey information is known as modulation.

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

The data terminal equipment provide the subscribers with the data reception facilities.

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

Bluetooth use phase-shift keying for exchanges end between devices.

5 most important type / satellite / telecommunications / geostationary satellite.

The most important type of satellite in telecommunications is 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.

Digital network can provide users quality of service higher than previously.

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

quang pin

The avalanche devices are generally more sensitive but they are more expensive then the pin photodiode.

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

tự.

simultaneously, modulation is used to amplify frequency of analogue signals.

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 Optical cable have more capacity, faster than copper cable V Write about the usefulness of computers (about100 words)

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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

2 What does a repeater do?

A repeater may be necessary to amplify or recreate the signal when it is being transmitted over long distances.

3 Why does it do so?

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.

The data switching exchange controls the setup and clear-down of data cals.

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

solutions

Mary of the world's telecommunications administration have explorerd digtal solutions.

4 Modulation / key concept / telecommunications.

Modulation is key concept in telecommunications.

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

A raw signal is not often not suitable for transmission over long distances at 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.

analogue exchange are costly to install and main tain and have faults such us crossed lines, noise and wrong number.

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

One of many advantages of optical fibres is lightweight and flexible material.

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

To reduce the number of cable, the local networks are usually divided into three parts.

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

The transmission routes using satellite connection is very high quality and less

problems.

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

When was the mobilephone service ussed ?.

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

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