ĐỀ CƯƠNG ÔN THI ANH VĂN CHUYÊN NGHÀNH ĐIỆN TỬ

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  1. COPYRIGHT©WWW.ET-HUI.COM ĐỀ CƯƠNG ÔN THI ANH VĂN CHUYÊN NGHÀNH ĐIỆN TỬ ( ^_^ Created by whitestone04 from www.et-hui.com ^_^ ) Unit 1: ELECTRONICS IN THE HOME 1. Electronics began ____the start of twentieth century with the invention of the vacuum tube A. at@ B. in C. on D. with 2. It was not until 1958 that microelectronics began with the development of ____ on silicon chips A. CDs B. hi-fi C. ICs @ D. vacuum tube 3. Electronics timers ____in digital alarm clocks, water heaters, electric cookers and microwave ovens A. is found B. are found @ C. is founded D. have been founding 4. In a simple radio, the function of the tuner is: A. to select the required signal @ B. to separate off the audio part of the signal C. to amplify the signal D. to drive the loudspeaker. 5. In a simple radio, the function of the detector is: A. to select the required signal B. to amplify the signal C. to separate off the audio part of the signal @ D. to drive the loudspeaker. 6. In a simple radio, the function of the AF amplifier is : A. to select the required signal B. to amplify the signal @ C. to separate off the audio part of the signal D. to drive the loudspeaker. 7. The radio ____ a tuner, a detector, and an AF amplifier. A. consists of B. is composed of C. consist of D. A & B is correct@ 8. A tuner, a detector, and an AF amplifier___ the radio. A. comprise ( bao gồm)@ B. combine C. consist D. compose 9. In a simple radio, the tuner ____ to the detector A. is connected B. is linked to C. is connecting D. A & B is correct@ 10. The volume control consists of a ten-microfarad electrolytic capacitor connected _____ with a five-kilohm potentiometer (POT) A. in series @ B. in serial C. parallel D. directly 11. What is used to convert sounds into audio frequency signal? A. loudspeaker B. mixer C. microphone@ D. detector 1
  2. COPYRIGHT©WWW.ET-HUI.COM 12. What is used to amplify the power of the modulated carrier wave? A. RF power amplifier@ B. amplifier C. aerial C. modulator 13. the function of the aerial is: A. to amplify the power of the modulated carrier wave B. to transmit the modulated carrier wave over long distances C. to receive the RF weak signal D. B & C is correct @ 14. CD is the abbreviation of___ A. Composed disc B. compact driver C. compact disc @ D. compacted disc 15. hi-fi is the abbreviation of_____ A. high-finger B. high-fidelity @ C. hide-fidelity D. hide-finger UNIT 2: COMPONENT VALUES 16. Resistors ______ with colored band to ease the problem of marking such small components. A. code B. coded C. are coded @ D. is coded 17. In a coded resistor, the forth band indicate___ A. the tolerance@ B. first digit C. forth digit D. number of zero following 18. If the forth band of a coded resistor is red, it means that A. the tolerance is 2% @ B. the tolerance is 5% C. the tolerance is 10% D. the tolerance is 20% 19. Relaxing the tolerance of the resistor enables the manufacture to sell them more _____ A. cheaper B. cheaply @ C. cheaplier D. expensive 20. The preferred value may seem _____ at first sight but this not so. A. illogic B. logical C. illogical @ D. illogically 21. Why do manufacturers make resistors in the preferred values rather than in equally stepped values? A. Because they will sell resistors more cheaply @ B. Because they will sell resistor more cheaper. C. Because they will sell resistors more expensively D. Because they can not do so 22. The fist band of a colored-banding coded capacitor indicate___ A. fist digit @ B. number of zeros following C. tolerance D. voltage 23. The forth band of a colored-banding coded capacitor indicate___ A. fist digit B. number of zeros following C. tolerance @ D. voltage 2
  3. COPYRIGHT©WWW.ET-HUI.COM 24. The fifth band of a colored-banding coded capacitor indicate___ A. fist digit B. number of zeros following C. tolerance D. voltage @ 25. Carbon resistors are _____compressed graphite which is formed into small tubes A. made of @ B. made in C. made from D. made to UNIT 3: RADIO 26. Based on the way of travel, how many kinds of radio waves ? A. One kind: surface or ground wave A. Two kinds: surface wave and sky wave C. Three kinds: surface or ground wave, sky wave and space wave. @ D. Four kinds: surface wave, ground wave, sky wave and space wave. 27. Surface or ground wave travels along the ground, following the ____of the earth’s surface. A. curvature @ B. culture C. line D. picture 28. Which material (vật liệu) has poor conductor? A. water B. sand @ C. A&B is correct D. A&B is incorrect 29. Poor conductors absorb surface or ground wave more ____than good conductor. A. weakly B. easily C. strongly @ D. hardly 30. _____ travels skywards and, if it is below a certain critical frequency (typically 300MHz), is returned to earth by the ionosphere. A. surface or ground wave B. space wave C. surface or ground wave and sky wave D. sky wave @ 31. ______ consists of layers of air molecules stretching from about 80km above the earth to 500km. A. atmosphere B. troposphere C. ionosphere @ D. stratosphere 32. VHF, UHF, and microwave signals are the _____ A. space wave @ B. sky wave C. ground wave D. surface wave. 33. When _____quickly, A cell may become hot A. discharge B. discharged C. discharging@ D. A cell dischange 34. The related noun(s) of the verb “Absorb” is/are A. absorber B. absorbtion C. absorption D. A&C are correct@ 35. The related noun of the verb “conduct” is/are A. conducter B. conducted C. conductivity@ D. conducty 36. AF is the abbreviation of_____ A. Audio Function B. Audition Fan C. Audio Frequency@ D. Audible Food 3
  4. COPYRIGHT©WWW.ET-HUI.COM 37. RF is the abbreviation of_____ A. Radio Frequence B. Radar Frequency C. Radio Frequency@ D. Road Frequency 38. AM is the abbreviation of_____ A. amplitude-modulated@ B. amplituding - modulated C. amplituding - modulated D. amplitude - modulating 39. FM is the abbreviation of_____ A. frequency- modulating B. frequency-modulated@ C. frequent- modulated D. frequent- modulating 40. A typical radio tuner circuit consists of an inductor and capacitor and capacitor connected in ______ A. paralel B. paraleled C. parallel@ D. paralleling UNIT 4: MAKING A RECORD 41. Each vocalist, instrument, or group of instruments _____ linked to a microphone on a mixer or mixing desk. A. is @ B. are C. were D. have been 42. The mixing desk allows the _____to adjust the recording level for each channel A. computing engineer B. telecommunicating engineer C. studio engineer @ D. All is correct 43. The instruments are ______through the mixer into a multitrack tape recorder A. channel B. to channel C. be channelled D. channelled@ 44. One of the most common effects is reverb (reverberation) which can made the music sound ___it was recorded in a very large building or a very small room. A. as if@ B. as C. if D. as far as 45. The ____sound is recorded on a two-track mastering machine to produce a master tape A. editing B. edited@ C. edit D. be edited 46. Each instrument ______using a microphone. A. records B. recording C. is recorded@ D. are recorded 47. The remixed tape _______to produce a master tape A. is mastered down@ B. are mastered down C. is master down D. masters down 48. the pits in the CDs represent the ____ audio pattern. A. analogue B. digital@ C. electromagnetic D. magnetic 49. the word “as” in the sentence “As the disc is revolved, a laser beam is used to mark audio information pattern on its surface” means A. because B. when@ C. equal D. for 4
  5. COPYRIGHT©WWW.ET-HUI.COM 50. After punching the centre hole,a _____ is applied and the CD is packaged A. label@ B. a pit mark C. a layer of plastic D. a box UNIT 5: COMPUTER 51. The I/O (input/output) unit _____ of one or more ICs. A. has B. consist C. consists@ D. includes 52. ______ is/are used to control the data going in and out of the computer A. I/O units @ B. ROM C. RAM D. address bus 53. The small ROM _____ some permanent storage A. gives B. provides@ C. give D. provide 54. What is used for temporary storage? A. RAM@ B. ROM C. CPU D. register 55. The contents of the RAM are constantly____. A. changing@ B. change C. changes D. fixed 56. What provides some permanent storage? A. RAM B. ROM@ C. CPU D. register 57. Which part of the computer controls the rest of the system and performs all the arithmetic and logic operations on the data? A. CPU@ B. ROM C. RAM D. data bus 58. The ____ only operates while the computer is switched on. A. RAM@ B. ROM C. CPU D. gate 59. CPU is the abbreviation of A. centre processor unit B. control program unit C. central program union D. central processing unit@ 60. What are buses in the computer used for? A. carrying the internal signal between each unit@ B. transferring data between all the units C. sending control signals from the CPU to the other unit D. sending signals from the CPU which indicate the memory and I/O locations to be used 61. What is used to transfer data between all the units A. data bus @ B. control bus C. address bus D. processor bus 62. What is used to send control signals from the CPU to the other unit? A. data bus B. control bus@ C. address bus D. processor bus 63. What is used to send signals from the CPU which indicates the memory and I/O locations? 5
  6. COPYRIGHT©WWW.ET-HUI.COM A. data bus B. control bus C. address bus@ D. processor bus 64. What is used to change AC voltages from small to large or from large to small? A. transformer@ B. diode C. resistor D. capacity 65. What is used to measure very small current? A. voltmeter B. miliammeter@ C.milimeter D. meter 66. What is used to check the logic level in the pins of ICs? A. VOM B. Oscilloscope C. logic probe@ D. Amp meter 67. What is used as a part of a burglar alarm to detect movement? A. motion sensor@ B. automatic cut-off C. entry and exit relay D. battery backup 68. What is used for the transmission of RF signal? A. detector B. radio set C. aerial @ D. receiver 69. What is used for protecting circuits from surge in voltage? A. Diode B. Fuse@ C. Resistor D. Switch 70. What is used to master down different recordings to make a master tape? A. Microphone B. CD C. multi-track recorder D. mixer @ 71. What is used to find buried metal? A. Radio B. Radar C. detector@ D. TV 72. What is the meaning of prefix semi-? A. haft@ B. full C. all D. not thing 73. What is the meaning of prefix de-? A. opposite of B. reverse of the action@ C. far D. across 74. What is the meaning of prefix dis-? A. opposite of @ B. reverse of the action C. far D. across 75. What is the meaning of prefix tele-? A. opposite of B. reverse of the action C. far @ D. across 76. What is the meaning of prefix tras-? A. opposite of B. reverse of the action C. far D. across @ 77. What is the meaning of prefix micro-? A. small @ B. many C. big D. large 78. What is the meaning of prefix multi-? A. small B. many @ C. big D. large 6
  7. COPYRIGHT©WWW.ET-HUI.COM 79. _____ is the digital switching circuit. A. logic gate @ B. VOM C. delay D. CB 80. _____ is the logic gates whose output depends on the combination of its input. A. Flip-Flop B. combinational logic@ C. IC D. CMOS 81. _____ is the number of ICs used in a computer. A. chip count@ B. count chip C. scale of integration D. BJT 82. ___ is an indication of the number of components used in an IC. A. chip count B. count chip C. scale of integration @ D. BJT 83. What is another name for a NOT gate? A. inventor B. converter C. inter D. inverter@ 84. What are two common families of logic ICs? A. TTL and CMOS @ B. BJT and CMOS C. TTL and FET D. BJT and FET 85. TTL is the abbreviation of _____ A. Transistor – Transfer logic B. Transistor – transistor Location C. Transistor – Transfer Location D. Transistor – transistor Logic@ 86. CMOS is the abbreviation of _____ A. Complementary Metal Oxide Semiconductor. @ B. Common Metal Oxide Semiconductor. C. Complementary Means Oxide Semiconductor. D. Complementary Metal Oxide Semiresistor. 87. VLSI is the abbreviation of _____ A. Very Large Signal of Integration B. Very Large Scale of Integration @ C. Very Long Scale of Integration D. Very Long Signal of Integration 88. MSI is the abbreviation of _____ A. Middle Scale of Integration B. Medium Scale of Integration @ C. Medium Signal of Integration D. Middle Signal of Integration 89. What is shown in a truth table? A. The output for all possible inputs@ B. the arrangement of the gates and the function of each pin on the chip C. Basic gates D. logic symbol 90. Which logic gate whose output is only high when all its inputs are high? A. OR B. AND@ C. NAND D. NOR 91. What is shown in an IC pin-out diagram? A. The output for all possible inputs B. the arrangement of the gates and the function of each pin on the chip@ 7
  8. COPYRIGHT©WWW.ET-HUI.COM C. Basic gates D. logic symbol 92. _____ use bipolar transistors to form each gate. A. TTL ICs @ B. CMOS ICs C. BJT ICs D. FET ICs 93. _____ use field effect transistors to form each gate. A. TTL ICs B. CMOS ICs @ C. BJT ICs D. FET ICs 94. _____ are better for battery-powered portable computers. A. TTL ICs B. CMOS ICs @ C. BJT ICs D. FET ICs 95. _____ are suitable for use in large, high speed computers. A. TTL ICs @ B. CMOS ICs C. BJT ICs D. FET ICs 96. What is used to convert electrical signal into visible signal? A. detector B. generator C. LDR D. Oscilloscope@ UNIT 6: REMOTE CONTROL 97. The remote control unit contains keys and electronic components similar to those of a _______ A. Computer B. Calculator @ C. mixer D. detector 98. The keys ______by a matrix of wires which cross beneath each individual key A. is connected B. are to connected C. are connected @ D. be connected 99. Almost ______light is emitted from the LED A. no visible @ B. not visible C. visible D. no invisible 100. ____signals are used to prevent interference from any constant infra-red background ‘noise’ A. Pulse B. Pulsed @ C. analogue D. Pulsing 101. When the transmitter is switched on, _____signals are sent from the transmitter to the receiver A. micro wave B. ultra-violet C. infra-red @ D. analogue 102. A code ___by the length and spacing of these pulses switches on the LED A. spelling out B. spelted out C. be spelt out D. spelt out @ 103. The electrical pulses are converted by the ___into pulsed infra-red radiation which is directed at the receiver A. LED @ B. LDR C. transistor D. resistor 8
  9. COPYRIGHT©WWW.ET-HUI.COM 104. The frequency of the oscillator is set by the _____ timing components R1,R2, and C1 A. internal B. international C. external @ D. externally 105. The current output of the amplifier is controlled by the resistor R3 which is connect in _____with the LED A. series @ B. sery C. serial d. serially UNIT 7: ALARM SYSTEM 106. A magnet mounted on the moving part of the window or door ______a switch mounted on the frame when the window or door is opened. A. trip B. tripped C. trips @ D. would trip 107. Which devices respond to the shock of the glass being broken? A. Radios B. vibration sensors @ C. pressure mats D. magnetic witches 108. ______ are fitted under the carpet-at the bottom of the stairs. A. magnetic switch B. break detector C. pressure mats @ D. motion sensor 109. Why should pressure mats be regularly tested and replaced if necessary? A. Because they’re constantly being walked on @ B. Because they aren’t constantly being walked on C. Because they are easy to be broken D. another reason 110. Motion sensors may use passive infra-red, ultrasonic or microwave energy to detect _____within their range A. sound B. light C. heat D. movement @ 111. When light falls on the LDR, its resistance ___ A. decreases @ B. decrease C. increases D. increase 112. The transistor switches between cut-off and ____as the input resistance changes. A. cut-on B. cut-out C. saturation @ D. interference 113. A diode is connected in reverse bias across the relay to prevent large back ___ A. EMF B. FME C. electromotive force D. A and C are correct @ 114. ___material is easily magnetized and demagnetized A. magnetic B. Ferric C. Ferromagnetic @ D. iron 115. The envelope contains____, which helps to prevent corrosion of the contacts. A. nitrogen @ B. hydrogen C. oxygen B. water 116. “You won’t set off the alarm when leaving or returning to the house”. This is – the _____ feature of alarm system 9
  10. COPYRIGHT©WWW.ET-HUI.COM A. Entry and exit relay @ B. automatic cut-off C. tamper protection D. battery backup 117. “This will stop the alarm after it has sounded for a set time, so that the noise doesn’t go on for hours if you’re not there to reset the system”. This is the _____ feature of alarm system A. Entry and exit relay B. automatic cut-off @ C. tamper protection D. battery backup 118. “The control panel incorporates sensors which will trigger the alarm if a burglar tries to force the box open”. This is _____ feature of alarm system A. Entry and exit relay B. automatic cut-off C. tamper protection@ D. battery backup @ 119. “If an intruder disconnects the main supply, the alarm will continue to work in a power cut”. This is _____ feature of alarm system A. Entry and exit relay B. automatic cut-off C. tamper protection D. battery backup @ 120. The opposite of cut-off is A. cut-on B. cut-in C. situation @ D. cut-in 121. The opposite of increase is A. up B. forward C. decrease @ D. unincrease 122. The opposite of fixed resistor is A. light resistor B. variable resistor @ C. LED D. coal resistor 123. The opposite of energize is A. de-energize @ B. un-energize C. dis-energize D. forward-energize 124. The opposite of slow is A. fast @ B. big C. large D. small 125. The opposite of forward bias is A. backward bias B. reserve bias @ C. back bias D. up bias UNIT 8: METAL DETECTOR 126. Despite their technical_____, metal detector are based on a few very simple principles. A. complexity @ B. complex C. easy D. combine 127. At fist, metal detectors were developed for military (quân sự) purposes to locate hidden___. A. metal B. rare find C. worthless item D. explosive @ (chất nổ) 128. Metal detectors operate on the principle of_______ induction A. electronic B. electromagnetic @ C. electrical D. magnetic 10
  11. COPYRIGHT©WWW.ET-HUI.COM 129. Metals are ____. A. semiconductors B. not conductors C. conductors @ D. liquid 130. A coin buried horizontally is ________ to detect than the same coin buried vertically. A. harder B. easier @ C. more harder D. more easy 131. When an AC voltage is applied to the search coil, a ____field is produce A. magnetic @ B. electronic C. electrical D. electric 132. The __ voltage is converted into audible note by the circuitry in the control box. A. inducing B. induced @ B. be induced D. be inducing 133. A microphone may be used to ___ sound A. detect @ B. induce C. generate D. make 134. Electrical pulsed are fist ____at a frequency in the upper audio range by the audio oscillator. A. generated @ B. induced C. detected D. generating 135. The oscillator ____ pulses at a fixed frequency of 32 786 Hz A. generate B. generates @ C. induce D. induced 136. What is used to convert digital signal into analogue signal? A. DAC converter @ B. ADC converter. C. DCA converter D. ACD converter 137. What is used to convert analogue signal into digital signal? A. DAC converter B. ADC converter @ C. DCA converter D. ACD converter 138. What is used to convert AC into DC? A. rectifier @ B. ADC converter C. transformer D. relay 139. What is used to convert electronic pulse into infra-red pulse? A. LED @ B. LDR C. LCD D. relay 140. special detectors are used in at airport to screen passengers for ___weapon (vũ khí) A. conceal B. concealed (ẩn dấu) @ C. concealing D. be concealed UNIT 9: CAREERS IN ELECTRONICS 141. We are now ____the midst of the technological evolution which started with the introduction of the micro chip in the 1970s. A. at B. in@ C. on D. into 142. More and _____electronic goods are being sold, especially computers, radio telephones, and leisure products. 11
  12. COPYRIGHT©WWW.ET-HUI.COM A. more@ B. less C. most D. the more 143. Most domestic appliances now ______ some form of electronic control A. be B. was C. is D. are@ 144. More engineer are ___to design, plan, manufacture and install A. require B. requiring C. required @ D. be required 145. Service engineers are particularly _____ demand. A. on @ B. in C. at D. onto 146. Aircraft electronic equipment has to ______to a very high standard with rigorous checks at set intervals A. be maintained @ B. maintained B. be maintain D. maintaining 147. LAN is the abbreviation of A. Local Area Network B. Logical Area Network C. Large Area Networking D. Long Area Noun 148. Defense systems require not only engineers to design them, ____ highly-skilled operators to man them and maintain them. A. but also B. but C. A and B is correct@ C. A and B is incorrect 149. Automation has led to saving for the manufacturer but has also contributed to __ A. unemployment@ B. employment C. employ D. unemployed 150. People today expect to be able to get in touch ____ each other at any time and in any place A. to B. with@ C. from D. for 151. Society ____a wide range of leisure electronic items A. expects B. expect C. have expected D. expecting 152. Recent years have seen a sharp ___in equipment for patient care. A. increase B. increased C. is increase D. All is incorrect D. Al l 12
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