Đề thi tiếng anh chuyên nghành điện tử viễn thông 30

Name: ............................................................ Ngày sinh

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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.
Questions:
1. What does a modern telephone often contain?
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2. Where does the telephone network start?
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3. What happens if your house has two phone lines?
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4. What is the usual colour of the pair of wires connected to the phone jack in your
house?

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5. How large is a digital concentrator?
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II. Translate the passage into Vietnamese. (A modern telephone… red and green
wires).
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III. Write complete sentences using the suggested words or phrases.

1. There / three major entities / provision / Internet service.
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2. basic purpose / provide / means / synchronous data transmission.
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3. Telecommunication / be / transmission / signals over / distance for / purpose/
communication.
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4. Where line networks / set up / can be / classified / indoor and outdoor.
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5. Bell / make / lot / inventions / but / telephone / most important.
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IV. Translate the following sentences into English.
1.

Trong thơng tin quang, các tín hiệu điện được biến đổi thành các xung ánh
sáng.
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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.
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4.

Trước đây lưu lượng truyền trên mạng Internet chủ yếu là thông tin trên cơ sở
văn bản.
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5.

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

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

•

Approximately 23,000 items of space junk which are floating above Earth. The
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

- orbit: quỹ đạo

- space junk: những vật thể bay trong vũ trụ
Questions:
1. What is a satellite basically?
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2. What do apogee and perigee mean?
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3. How many copies of Iridium satellites are there in orbit?
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4. What is the term "satellite" typically used to describe ?
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5. Give one example of artificial satellites.
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II. Translate the passage into Vietnamese. (A satellite is basically … 60 copies in
orbit).
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III. Write complete sentences using the suggested words or phrases.
1. quality / speech transmitted /by satellite / good.
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2. technique used / exchange / be / space division switching.
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3. data network / consist / number / components /which / interconnected.
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4. Today/ telecommunication devices / such as / television / radio / telephone / be /

common / many parts / world.
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5. Voice communications / seldom / carried by / geosynchronous satellites.
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IV. Translate the following sentences into English.
1. Các nhà cung cấp dịch vụ cung cấp truy cập Internet.
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2. Nhiệm vụ của hệ thống chuyển mạch là để thiết lập một kênh tạm thời giữa
người gọi và thuê bao được gọi.
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3. Viễn thơng đóng một vai trị quan trọng trong nền kinh tế thế giới.
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4. Nguồn sáng có thể là đi ốt phát quang hay laser.
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5. Một trong những cách phân lọai cáp thông tin là theo chất liệu.
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V. Write about the history of telephone exchanges. (about 100 words)
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6


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:
•
A switch to connect and disconnect the phone from the network - This switch is
generally called the hook switch. It connects when you lift the handset.
•
A speaker - This is generally a little speaker.
•
A microphone - In the past, telephone microphones were so simple: carbon
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?
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2. In what way can you realize how amazing the telephone is?
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3. How many parts could the very simplest working telephone contain?
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4. What does a switch do?
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5. Were telephone microphones in the past complicated:
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II. Translate the passage into Vietnamese.( Perhaps the telephone … the telephone is!)
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III. Write complete sentences using the suggested words or phrases.
1. Cellular communications service / systems / be design / serve mobile users.
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2. Stored Program Control / application / data processing and computer techniques /
exchange.
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3. concentrator / be / to collect traffic / a number / individual subscriber circuits.
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4. Computer communication / across / Internet / be one / many examples /
telecommunication.
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5. Electronic systems / installed / 1870s.
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IV. Translate the following sentences into English.
1. Nói chung các hệ thống viễn thơng do các kỹ sư viễn thông thiết kế.
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2. Trong thông tin quang, có hai loại bộ tách quang: đi ốt quang pin và đi ốt quang
thác.
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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 vịng vài giây.
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4. Cáp quang có nhiều ưu điểm so với cáp đồng thông thường.
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5. Điều xung mã là q trình trong đó tín hiệu điện thọai tương tự được biến đổi
thành tín hiệu số.
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V. Write about some advantages of optical fibers. (about 100 words)
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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
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.
Questions:
1. What are the basic elements of a telecommunication system
............................................................................................................................
2. Why is telecommunication
communication?

over

a

phone

line

called

point-to-point

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3. How is the information encoded in a digital signal?
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4. How do electrical signals typically travel?
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5. What does the device on the receiving end do to the signal?
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II. Translate the passage into Vietnamese. (Telecommunications devices ... on a
computer screen.)
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III. Write complete sentences using the suggested words or phrases.
1. a number / technologies / been introduced / provide faster data speeds.
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2. shaping / signal / convey information / known / modulation.
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3. data terminal equipment / provide / subscribers / data reception facilities.
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4. Bluetooth / use / phase-shift keying / for exchanges / between devices.
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5. most important type / satellite / telecommunications / geostationary satellite.
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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.
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2. Các thiết bị quang thác thường nhạy hơn nhưng chúng cũng đắt hơn so với điốt
quang pin.
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3. Đồng thời, điều chế còn được sử dụng để khuyếch đại tần số của tín hiệu tương
tự.
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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.
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5. Cáp quang đem lại dung lượng truyền lớn hơn, tốc độ nhanh hơn so với cáp
đồng.
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V. Write about the usefulness of computers. (about100 words)
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12


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?
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2. What does a repeater do?
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3. Why does it do so?
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4. Give the definition of a channel?
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5. What is the medium that radio stations broadcast divided by?
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II. Translate the passage into Vietnamese. (A collection … from noise)
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III. Write complete sentences using the suggested words or phrases.
1. Internet service provider / view / access / connection / from its customer /
network.
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2. data switching exchange / control / set-up / clear-down / data calls.
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3. Many / the world's telecommunications administration / explored / digital
solutions.
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4. Modulation / key concept / telecommunications.
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5. A raw signal / often not suitable / transmission / long distances / free space.
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IV. Translate the following sentences into English.

1. Tổng đài analog lắp đặt và bảo dưỡng thì tốn kém và có những lỗi như xun
âm, can nhiễu và sai số.
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2. Một trong những ưu điểm của sợi quang là chất liệu nhẹ và linh hoạt.
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3. Để giảm số cáp, mạng nội hạt thường được phân chia thành ba phần.
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4. Việc truyền dẫn sử dụng các tuyến nối vệ tinh có chất lượng rất cao và ít có
trục trặc.
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5. Các dịch vụ điện thoại di động đã được đưa vào sử dụng năm nào?
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V. Write about your learning technical English (about 100 words)
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15


Name: ............................................................ Ngày sinh

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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?
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2. What would happen when a calling party lifted the receiver?
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3. What might happen after the operator asked, "number please?"
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4. What was the average time to complete a long-distance call in 1918?
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5. What did the originating operator do in the ringdown method?
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II. Translate the passage into Vietnamese. (The first telephone exchange… miles
away)
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III. Write complete sentences using the suggested words or phrases.
1. Why / Strowger / invent / automatic telephone exchange?
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2. In 1948 / transistor / invention Bell Telephone Laboratories .
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3. Transmission characteristics / satellite links / excellent / and problems / few.
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4. There / two secondary centre/ connected / DSC / in Sisley / radio link.
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5. Radar systems / also enable / air-traffic controllers / follow / guide / flight paths /
planes / take-off / land.
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IV. Translate the following sentences into English.
1. Loại vệ tinh quan trọng nhất cho viễn thông là vệ tinh vệ tinh địa tĩnh.
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2. Rất nhiều cơng ty, tập đồn và cá nhân đã sử dụng Internet trong thông tin liên
lạc.
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3. Giá của vệ tinh bắt đầu giảm, và kết quả là vệ tinh bắt đầu cạnh tranh với cáp
ngầm dưới biển.
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4. Thiết bị thu tín hiệu, khuyếch đại, đổi tần số và sau đó phát lại được gọi là thiết
bị phát đáp.
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5. Trong giải pháp này, đường dây nối giữa các bộ tập trung kênh và tủ cáp sử dụng
kỹ thuật số.
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V. Write about the importance of English in your life and work. (about 100 words).
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18


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?
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2. Which can be drawn to smaller diameters?
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3. Why can more fibers be bundled into a given-diameter cable?
............................................................................................................................
4. Why are they non-flammable?
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5. Why do optical fibers offer clearer phone conversations or TV reception?
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II. Translate the passage into Vietnamese. (Why are fiber-optic systems … givendiameter cable than copper wires.)
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III. Write complete sentences using the suggested words or phrases.
1. Several factors/ will influence / future developments / VoIP / products /
services.
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2. Call charge / mean / cost / telephone call.
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3. 109 nation/ member/ of INTELSAT.
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4. In analogue line / sound / amplified / regular intervals.
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5. What / remote data processing mean?
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IV. Translate the following sentences into English.

1. Việc phát triển, sản xuất và phóng một vệ tinh rất tốn kém.
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2. Sai số có nghĩa là cuộc gọi có thể được định tuyến sai.
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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.
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4. Vệ tinh nhận, khuyếch đại và tái định hướng thơng tin ta gửi lên cho nó.
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5. Trong những năm gần đây, công nghệ viễn thông phát triển với tốc độ rất
nhanh.
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Write
about
V.
(about 100 words).

the

role

of

telecommunications

in

society.

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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. Multimode 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?

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3. What is the differences between single-mode fibers and multi-mode fibers?
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4. What are special about optical fibers that are made from plastic?
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5. Why are fiber optics usec in many industries?
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II. Translate the passage into Vietnamese. (Fiber optics (optical fibers) ......... called a
jacket.)
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III. Write complete sentences using the suggested words or phrases.
1. DGPT / planned /
following demands.

build / national communication infrastructure / meet/

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2. What / manual system / require /from operators?
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3. digit / telephone exchanges / called / SPC (stored program control), exchanges.
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4. What / speech / carried / digital switch / converted into?
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5. In / solution, analogue transmission / only used / lines / concentrators / in /
cabinets.
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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.
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2. Anh ta chịu trách nhiệm về dự án hiện đại hóa thiết bị của họ.
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3. Thiết bị này có thể giúp khách hàng tiết kiệm chi phí nhiên liệu và đáp ứng nhu
cầu của họ.
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4. Một vệ tinh có thể xử lý một lượng thơng tin lớn mà nó có thể gửi đi một vùng
rộng lớn trên trái đất.
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5. Mạng thuê bao được chia thành mạch thuê bao, mạch trung cấp và mạch sơ cấp.
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V. Describe what you do in your work and mention the technical equipment you
often usein your work . (about 100 words).
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