Bài Test Tiếng Anh chuyên ngành Điện Tử Vễn Thông - Ptit

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Ci ny mnh t lm, hay pht y!

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Bi 1+3: in thoi bn -- Bi 2: V tinh --- Bi 4+10: HT Vin Thng Bi 5: B thu pht Bi 6: lch s Exchange Bi 7+8: cp quang Bi 9: Remote access Test 1 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? A modern telephone often includes a bell so it can ring and a keypad and frequency generator. 2. Where does the telephone network start? The telephone network starts in your house 3. What happens if your house has two phone lines? If your house has two phone lines, then two separate pairs of copper wires run from the road to your house. 4. What is the usual colour of the pair of wires connected to the phone jack in your house? The second pair is usually colored yellow and black inside your house. 5. How large is a digital concentrator? About the size of a refrigerator II. Translate the passage into Vietnamese. Mt ci in thoi hin i thng bao gm mt ci chung n c th ku v mt bn phm v mt b pht tn s. C mt micro in t, mt b khuch i v mch in. Cc chung c kh thng c thay th bng mt ci loa v mt mch in pht ra mt bn nhc chung d chu. Tuy nhin, mt chic in thoi thng thng vn l mt trong nhng thit b n gin nht. Mng in thoi bt u t trong nh ca bn. Mt i dy ng chy t mt ci hp trn1

ng n mt ci hp nh bn. T , i dy c kt ni ti mi dc cm in thoi trong nh ca bn (thng dng dy mu v dy mu xanh l cy). Nu nh bn c hai ng dy in thoi, th sau hai cp dy ng ring bit chy t ng n ngi nh ca bn.Cp dy th hai lun lun c mu vng v mu en trong nh ca bn. Dc trn con ng chy dy l mt b cp dy vi 100 i cp ng hoc nhiu hn. Tu thuc vo ni bn , ci dy cp dy ny s chy trc tip n chuyn mch ca cng ty in thoi trong khu vc ca bn hoc n s chy n mt ci hp c kch c ca mt ci t lnh hot ng nh mt trung tm chuyn mch s. III. Write complete sentences using the suggested words or phrases. 1. There / three major entities / provision / Internet service. There are three maijor entities in the provision of internet service. 2. basic purpose / provide / means / synchronous data transmission. Its basic purpose is to provide a means of synchronous data transmission. 3. Telecommunication / be / transmission / signals over / distance for / purpose/ communication. Telecommunication means the transmission of signal over a long distance for the purpose of communication. 4. Where line networks / set up / can be / classified / indoor and outdoor. Where line networks are set up can be classified in the indoor and outdoor. 5. Bell / make / lot / inventions / but / telephone / most important. Bell made a lot of inventions but the telephone is the most important. IV. Translate the following sentences into English. 1. Trong thng tin quang, cc tn hiu in c bin i thnh cc xung nh sng. Fibre-optic communications, in which electrical signals are converted into pulses of light. 2. Cp kim loi c th s dng cho c hai loi knh thoi - tng t v s. Metal cable can be used for both voice channels analog and digital. 3. Cc trm lp u cui c th c t trong trm mt t hay cc tng i chuyn tip. Terminal repeater stations can be placed in the ground station or junction exchanges. 4. Trc y lu lng truyn trn mng Internet ch yu l thng tin trn c s vn bn. Previous, The traffic on the internet network is mainly information on the basis of the text. 5. Mng LAN c bit hu dng trong cc cng ty, trng i hc LAN (Local area network) is especially useful in companies, universities, V. Write about the importance and usefulness of Internet services. (about 100 words).( Tm quan trng, hu ch ca internet).2

-------------------------------------------------------------------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: cn im, im gn tri t nht - artificial: nhn to - apogee: im xa tri t nht - custom built: sn xut theo n t hng - orbit: qu o - space junk: nhng vt th bay trong v tr Questions: 1. What is a satellite basically? A satellite is basically any object that revolves around a planet.. 2. What do apogee and perigee mean? In the orbit, the farthest point from Earth is the apogee, and the nearest point is the perigee. 3. How many copies of Iridium satellites are there in orbit? with over 60 copies in orbit 4. What is the term "satellite" typically used to describe ? the term "satellite" is typically used to describe a useful object placed in orbit to perform some specific task 5. Give one example of artificial satellites. Such as moon. II. Translate the passage into Vietnamese. Mt v tinh v c bn l bt k i tng no xoay quanh mt hnh tinh. Mt trng l gc ca Tri t, v tinh t nhin, v c nhiu v tinh nhn to, thng l gn vi Tri t.3

Cc ng dn v tinh sau l mt qu o. Trong qu o, im xa nht t Tri t lnh cao, v cc im gn nht l cn im. V tinh nhn to thng khng c sn xut rt nhiu. Hu ht cc v tinh c ngu nhin xy dng. Tuy vy, cc v tinh GPS (vi hn 20 bn sao trn qu o) v cc v tinh Iridium (vi hn 60 bn sao trn qu o). Khong 23.000 mt hng ca rc khng gian m l ni trn Tri t. Cc con s thc t khc nhau ty thuc vo c quan l m. y ca hng trc tuyn ca cc v tinh gn 26.000 mc. Mc d bt c iu g trong qu o quanh tri t l mt v tinh k thut, thut ng "v tinh" thng c s dng m t mt i tng hu ch c t trong qu o thc hin mt s nhim v c th. Chng ta thng nghe v cc v tinh thi tit, v tinh lin lc v v tinh khoa hc. III. Write complete sentences using the suggested words or phrases. 1. quality / speech transmitted /by satellite / good. The quality speech transmitted by satellite is good 2. technique used / exchange / be / space division switching. The technique used to exchange is space divion switching 3. data network / consist / number / components /which / interconnected. The data network consists of a number of components which are interconnected. 4. Today/ telecommunication devices / such as / television / radio / telephone / be / common / many parts / world. Today, the telecommunication devices such as television, radio and telephone can be common many parts on the world. 5. Voice communications / seldom / carried by / geosynchronous satellites. Voice communications seldom are carried by The geosynchronous satellites. IV. Translate the following sentences into English. 1. Cc nh cung cp dch v cung cp truy cp Internet. Service providers offer internet access. 2. Nhim v ca h thng chuyn mch l thit lp mt knh tm thi gia ngi gi v thu bao c gi. The mission of the switching system is to establish a temporaty channel between the caller and called subscriber. 3. Vin thng ng mt vai tr quan trng trong nn kinh t th gii. Telecommunications is an important part of the world economy. 4. Ngun sng c th l i t pht quang hay laser. Light sourcescan be either light-emitting diode (LEDs) or lasers 5. Mt trong nhng cch phn lai cp thng tin l theo cht liu. One of the ways cable classification is according to material information. V. Write about the history of telephone exchanges. .....................................................................................................................................4

Test 3 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 s