coaching electronics

ELECTRONICS FINAL COACHING

1. Desktop and personal computers are also known as ___.ANS. MICROCOMPUTERS

2. Laser beam technology is used for __.ANS. OPTICAL DISKS

3. A bundle of basic software designed to work together:ANS. SUITE

4. Time-sharing of resources by users is usuallyANS. BASED ON TIME SLICES

5. Management of an operating system is handled by:ANS. THE SUPERVISOR PROGRAM

6. The process of allocating main memory separate from one another is called:ANS. MEMORY MANAGEMENT

7. The technique whereby part of the program is stored on disk and is brought into memory for execution as needed is called __.ANS. VIRTUAL STORAGE

8. Another name for an operating environment is __.ANS. SHELL

9. Which one of the following uses graphical icons?ANS. GUI

10. An on-screen picture.ANS. ICON

11. The memory area for programs with highest priority.ANS. FOREGROUND

12. Prewritten standard file-handling programs are called __.ANS. UTILITIES

13. The signal that the computer is awaiting a command from the user:ANS. PROMPT

14. NOS refers to:ANS. OPERATING SYSTEM FOR A NETWORK

15. PDA stands for:ANS. PERSONAL DATA ASSISTANT

16. An imaging technique used to measure the magnetic fields produced by electrical activity in the brain.ANS. MAGNETOENCEPHALOGRAPH

17. What sensor is used in magnetoencephalograph?ANS. SUPERCONDUCTING QUANTUM INTERFERENCE

18. Main program in the operating system.ANS. KERNEL

19. Which of the following splices is NOT butted?ANS. KNOTTED TAP JOINT

20. What nonmetallic material is most commonly used to protect wires and cables?ANS. FIBROUS BRAID

21. When a wire is insulated with glass braid or asbestos and requires stripping, which of the following tools should not be used?ANS. HOT-BLADE WIRE STRIPPER

22. When you solder electrical connector splices, and terminal lugs, what type of solder should you use?ANS. 60/40 SOLDER

23. When noninsulated splices and terminal lugs are insulated, what types insulation are most commonly used?ANS. RUBBER TAPE AND HEAT SHRINKABLE TUBING

24. When a Western Union splice is used to connect two wires, why should the twisted ends of the wires be pressed down as close as possible to the straight portion of the wire?ANS. TO PREVENT THE WIRES FROM PUNCTURING THE TAPE COVERING

25. What types of insulation are best suited for use in a high-temperature environment?ANS. FEP, EXTRUDED POLYTETRAFLUOROETHYLENE AND SILICONE RUBBER

26. What should be done with the removable tip of a soldering gun after it becomes pitted?ANS. FILE THE TIP SMOOTH AND RETIN IT

27. For a gyro to be universally mounted, it MUST have a total of how many gimbals, if any?ANS. TWO

28. A position servo system exhibits a series of overtravels. This condition is known by which of the following terms?ANS. HUNTING

29. For a servo system to operate smoothly and efficiently, it must have balance between which of the following factors?ANS. AMPLIFICATION AND DAMPING

30. The operating of an accelerometer is based on what physical property?ANS. INERTIA

31. Amount of precession of a … is proportional to what input factor?ANS. RATE OF GYRO CASE ROTATION

32. What does the arrow on a synchro schematic symbol indicate?ANS. THE ANGULAR POSITION OF THE ROTOR

33. In a properly operating servo system, what is the phase relationship between the reference voltages to the error detector and the demodulator?ANS. IN PHASE ONLY

34. Synchro capacitors are used to provide which of the following characteristics in a synchro system?ANS. IMPROVED ACCURACY

35. Multispeed synchro systems have what of the following advantages over singlespeed synchro systems?ANS. GREATER ACCURACY

36. During synchro alignment, what is the purpose of the coarse setting?ANS. TO ENSURE A SETTING OF ZERO DEGREES RATHER THAN I80 DEGREES

37. The voltage used to prevent false synchronization is known by what term?ANS. STICKOFF VOLTAGE

38. If you find that a synchro has bad bearings, which of the following actions should you take?ANS. REPLACE THE SYNCHRO39. In what maximum number of directions is a rate gyro free to precess?ANS. TWO

40. Pulse-counting accelerometers are designed for use only with what type of equipment?ANS. DIGITAL COMPUTERS41. Because its resistance changes very little temperature changes, what conductor is best suited for use in measuring instruments?ANS. MANGANIN

42. What definition best describes an insulating material?ANS. A MATERIAL THAT HAS A VERY HIGH RESISTANCE

43. Plastic insulation is normally used for what levels of voltage?ANS. MEDIUM TO LOW

44. What is the common name for enamel insulated wire?ANS. MAGNET WIRE

45. The preferred method for removing insulation from most types of insulated wire is by using what tool?ANS. WIRE STRIPPER

46. When is a rattail normally used?ANS. WHEN A BRANCH CIRCUIT IS REQUIRED AND A JUNCTION BOX IS USED TO JOIN CONDUIT

47. When a large aluminum terminal lug or splice is installed, why is it NOT necessary to clean the aluminum wire?ANS. THE WIRE IS CLEANED BY THE ABRASIVE COMPOUND IN THE LUG OR SPLICE

48. What action generally causes a fractured solder joint?ANS. MOVEMENT OF THE SOLDERED PARTS DURING THE COOLING PROCESS

49. When a wire is soldered to a connector, why should the wire be stripped approximately 1/32 inch longer than the depth of the solder barrel?ANS. TO PREVENT BURNING THE WIRE INSULATION

50. Why should a small wattage soldering iron NOT be used to solder large conductors?ANS. THE IRON MAINTAIN A SATISFACTORY SOLDERING TEMPERATURE WHILE GIVING UP HEAT TO THE CONDUCTOR

51. When electrical and electronic components are soldered, what type of flux must be used?ANS. ROSIN

52. What is the most efficient soldering temperature?ANS. 550OF53. The current gain in a common-collector circuit is called __.ANS. GAMMA

54. A method for checking transistor is cumbersome when more than one transistor is bad in a circuit?ANS. SUBSTITUTION METHOD

55. A breakdown theory that explains the action that take place in a heavily doped PN-junction with a reverse bias of less than 5 volts.ANS. ZENER EFFECT

56. The arrow in a MOSFET indicates a __.ANS. SUBSTRATE

57. What provides a timing signaling in a digital equipment?ANS. CLOCK

58. A faulty transistor would be identified as what level of packaging?ANS. LEVEL 0

59. What is the preferred tool to use to strip of aluminum wire?ANS. KNIFE

60. The ability of a gyro to maintain a position in space is referred to by what term?ANS. PRECESSION

61. A device that allows the depositing of material in selected areas of a semiconductor substrate, but not in others is known as aANS. WAFER MASK

62. Letters and number stamped on body of an IC serve to provide which of the following types of information?ANS. USE

63. Electrostatic charges may develop as high as which of the following voltages?ANS. 35,000 VOLTS

64. Damage to some electronic components can occur at what minimum electrostatic potential?ANS. 35 VOLTS

65. The most complex to produce and difficult to repair printed circuit boards are those made using which of the following methods?ANS. LAYER-BUILD UP

66. What is the minimum number of synchro devices needed for a simple synchro transmission system?ANS. TWO

67. The value of voltage or current at one particular instant of time.ANS. INSTANTANEOUS

68. What type of filter is used to block the passage of current for a narrow band of frequency while allowing current to flow at all frequencies above or below this band?ANS. BAND REJECT FILTER

69. If you are looking for both good voltage gain and high input resistance, you must use a __.ANS. COMMON-SOURCE AMPLIFIER

70. What term is used to describe electronic systems that are made up of extremely small parts or elements?ANS. MICROELECTRONICS

71. Pn junctions are protected from contamination during the fabrication process by which of the following materials?ANS. OXIDE

72. To deposit highly … substrate, which of the following methods is used?ANS. VACUUM EVAPORATION

73. In IC production, gold or aluminum bonding wires are used for which of the following purposes?ANS. TO CONNECT THE CHIP TO THE PACKAGE LEADS

74. An assembly of microcircuits or a combination of microcircuits and discrete components is referred to as a

ANS. MICROCIRCUIT MODULE

75. Test equipment that continuously monitors performance and automatically isolates faults to removable assemblies is what category of equipment?ANS. ON-LINE

76. Which of the following alloys will melt directly to liquid and have no plastic or semiliquid state?ANS. EUTECTIC ALLOY

77. A conformal coating is considered thin if it is less than what thickness?ANS. 0.025 INCH78. What maximum number of logic gates should be expected in a large-scale integration circuit?ANS. 2,000

79. Protective materials applied to electronic assemblies to prevent damage caused by corrosion, moisture, and stress are called __.ANS. CONFORMAL COATINGS

80. Cutting and peeling is an easy method of removing which of the following types of coatings?ANS. SILICONE

81. What are the approved methods of conformal coating removal?ANS. MECHANICAL, THERMAL & CHEMICAL

82. Turret, fork, and hook terminals are examples of what type of termination?ANS. ABOVE-THE-BOARD

83. What total number of degrees of bend are (a) fully clinched leads and (b) semiclinched leads?ANS. (A) 90 (B) 45

84. Stirring the lead during desoldering prevents which of the following unwanted results?ANS. SWEAT JOINTS

85. Most damage to printed circuit boards occur at which of the following times?ANS. DURING COMPONENT REMOVAL

86. When removing solder with a solder wick, where should the wick be placed in relation to the solder joint and the iron?ANS. BETWEEN THE JOINT AND THE IRON

87. Visual inspection of a completed repair is conducted to evaluate which of the following aspects of the repair?ANS. WORKMANSHIP QUALITY

88. Plug-in DIPs are susceptible to loosening because of which of the following causes?ANS. VIBRATION

89. For the removal of imbedded TOs in which of the following are free, which of the following methods is recommended?ANS. PUSH OUT GENTLY

90. When a TO or a DIP is replaced on a printed circuit board, what type of termination is normally used?ANS. THROUGH-THE-BOARD91. Heating the leads and lifting them up with tweezers is the preferred method of removing which of the following components?ANS. FLAT PACKS

92. What is the first step in the repair of burned or scorched boards?ANS. REMOVING ALL DISCOLORED MATERIAL

93. The force between a magnet and a piece of ferromagnetic metal that has not been magnetized:ANS. IS NEVER REPULSIVE

94. What significant advantage, in some applications, of a toroidal coil over a solenoid is:ANS. THE MAGNETIC FLUX IN A TOROID IS PRACTICALLY ALL WITHIN THE CORE

95. What is the unit of current?ANS. AMPERE

96. What is the unit of resistance?ANS. OHM

97. What is the unit of charge?ANS. COULOMB

98. What is the lightest element?ANS. HYDROGEN

99. What is the maximum output voltage rate of change of an op-amp?ANS. SLEW RATE

100. A converter that changes ac-voltage to another ac-voltage level. ANS. AC-CONVERTER

101. Which one is NOT a factor affecting resistance?ANS. MASS

102. Output of 1 if all inputs are 0.ANS. NOR GATE

103. Output of 0 if all inputs are 0.ANS. OR GATE

104. Output of 1 if all inputs are 1.ANS. AND GATE

105. An adder which can add up two binary digits but will not produce a carry.ANS. QUARTER ADDER

106. Boolean algebra is used primarily by __ to simplify circuits.ANS. DESIGN ENGINEERS

107. Which of the following terms applies to the output of a control transformer?ANS. ERROR SIGNAL

108. What is the harmonic composition of square wave in phase with the fundamental?ANS. ODD HARMONIC

109. Input of the d-flip flop.ANS. DATA AND CLOCK]

110. What gyro characteristic provides the bases of the operation at a rate gyro?ANS. PRECESSION

111. Component containing IC.ANS. MICROCIRCUIT

112. What is the purpose of using toggle flip-flops?ANS. TO DIVIDE THE INPUT FREQUENCY BY 2

113. How does the stator receive its voltage?ANS. BY MAGNETIC COUPLING FROM THE ROTOR

114. An instrument used to measure relative humidity.ANS. PSYCHROMETER

115. A structure for solids in which the position of atoms is predetermined. ANS. CRYSTALLINE

116. The most popular op-amp packages are metal can, 8-pin DIP, and the SMT. Which of these corresponds to TO-99?ANS. METAL CAN

117. The minimum amount of current needed for an SCR to conduct continuously.ANS. HOLDING CURRENT

118. The voltage across the anode (A) and cathode (K) terminals of an SCR when conducting.ANS. HOLDING VOLTAGE

119. Confining each program to certain defined limits in memory is called __.ANS. MEMORY PROTECTION

120. Transient suppression minimizes the chance of __.ANS. DIODE FAILURE

121. In OTA, transconductance is control by __.ANS. BIAS CURRENT

122. What inductor is used at frequency 95 MHz?ANS. AIR CORE

123. Regulator that dissipates less power and less heat.ANS. SWITCHING REGULATOR

124. … oscilloscopeANS. TRIGGER HOLD OFF

125. Set of programs that are between applications software and hardware.ANS. OPERATING PROGRAM126. Instrumentation amplifiers are used in __.ANS. HIGH–NOISE ENVIRONMENT

127. What type of indicating instrument is installed in the stator circuit of synchro system?ANS. AN OVERLOAD INDICATOR

128. ___ is the process making a material “passive” in relation to another material prior to using the materials together.ANS. PASSIVATION

129. … higher frequency …ANS. RADIO FREQUENCY BRIDGE

130. It sometimes known as Maxwell-Wein bridge. …ANS. MAXWELL BRIDGE

131. Self-inductance … capacitance and resistance…ANS. OWEN BRIDGE

132. A graph of thermodynamic properties of moist air at a constant pressure, such as wet-bulb temperature and dry-bulb temperature.ANS. PSYCHROMETRIC CHART

133. The liberation or absorption … when an electric current flows from a warmer to a cooler part of a conductor is called __.ANS. THOMSON EFFECT

134. Which of the following terms describes the first remainder when converted to decimal numbers to other bases?ANS. LSD

135. What causes the process called junction recombination to occur when N and P materials are joined together?ANS. THE DIFFUSION OF ELECTRONS AND HOLES MOVING ACROSS THE JUCTION INTO THE TWO MATERIALS

136. Which of the following will apply to a moving coil instrument?ANS. EVEN SCALE MEASURING DC

137. Which of the following will apply to a moving coil rectifier instrument?ANS. EVEN SCALE MEASURING AC

138. Which of the following will apply to a moving iron instrument?ANS. UNEVEN SCALE MEASURING AC AND DC

139. A method of curve fitting using linear polynomials heavily employed in mathematics particularly numerical analysis and numerous applications including computer graphics.ANS. LINEAR INTERPOLATION

140. The voltage across the anode and cathode terminals of the SCR when conducting. ANS. HOLDING VOLTAGE

141. What are examples of acceptor impurities? ANS TRIVALENT IMPURITIES

142. What are examples of trivalent impurities? ANS. BORON , GALLIUM, INDIUM

143. The maximum output voltage swing of an op-amp? ANS. +VSAT TO –VSAT

144. The current needed at the input of an op-amp to operate it normally. ANS. INPUT BIAS CURRENT

145. The most extensively used semiconductor. ANS. SILICON

146. What current flow in a semiconductor is due to the applied electric field? ANS. DRIFT CURRENT

147. The purpose of installing thyrectors. ANS. TO PROTECT THE CIRCUITS FROM HIGH VOLTAGE SURGES

148. Confining each program to certain defined limits in memory is called ______. ANS. MEMORY PROTECTION

149. Transient suppression minimizes the chance of _____. ANS. DIODE FAILURE

150. In OTA transconductance is controlled by_____. ANS. BIAS CURRENT

151. What inductor is used at frequencies of 95 MHZ. ANS. AIR CORE

152. Regulator that dissipates less power and less heat. ANS. SWITCHING REGULATOR

153. Period of time which the oscilloscope cannot trigger. ANS. TRIGGER HOLD OFF

154. A good form of inductor at FMANS. AIR CORE

155. Set of programs that lies between application software and the computer hardware. ANS. OPERATING PROGRAM

156. Instrumentation amplifiers are used in____. ANS. HIGH NOISE ENVIRONMENT

157. What type of indicating device is usually installed in the stator circuit of a torque synchro system. ANS. AN OVERLOAD INDICATOR

158. ____ is the process of making a material “passive” in relation to another material prior to using the material together. ANS. PASSIVATION

159. In the context of corrosion, _____ is the spontaneous formation of a hard non reactive surface film that inhibits further corrosion. This layer is usually an oxide or nitride that is a few molecules thick. ANS. PASSIVATION

160. Two conductors with insulator between them is called_____. ANS. CONDENSER (OLD NAME)/ CAPACITOR (NEW NAME)

161. Chemical reactions that release energy are called exothermic reactions; ____ is an example of exothermic reaction. ANS. FREEZING

162. This bridge is often used in laboratories to measure both capacitances and inductive circuits at higher frequencies. ANS. RADIO FREQUENCY BRIDGE

163. Is sometimes called Maxwell – wien bridge and is used to measure an unknown inductance with a standard capacitance. ANS. MAXWELL BRIDGE

164. A four arm alternating current bridge used to measure self inductance in terms of capacitance and resistance; bridge balance is independent of frequency. ANS. OWEN BRIDGE

165. A graph of the thermodynamic properties of moist air at a constant pressure, such as wet bulb temperature and dry bulb temperature. ANS. PSYCHROMETRIC CHART

166. The liberation or absorption of heat when an electric current flows from a warmer to a cooler part of a conductor is called ______. ANS. THOMSON EFFECT

167. A certain condition wherein a nucleon can be stimulated to emit a very sharply defined beams of gamma rays. ANS. MOSSBAUER EFFECT

168. Which of the following type of test equipment is classified as off-line automatic test equipment. ANS. VERSATILE AVIONIC SHOP TEST (VAST)

169. Which of the following terms describing the first remainder when converting decimal number to other bases.ANS. LSD

170. How do you connect a voltmeter in a circuit? ANS. IN PARALLEL

171. How do you increase the range of a voltmeter? ANS. INSERT A HIGH RESISTANCE IN SERIES WITH THE METER

172. As a rule of thumb, power rectifier can operate satisfactorily with front to back ratio or the back to front ratio of. ANS. 10 TO 1

173. As a rule of thumb, signal diode can operate satisfactorily with front to back ratio or the back to front ratio of. ANS. 300 TO 1

174. What maintains a more constant speed under varying load conditions than a series motor. ANS. SHUNT MOTOR

175. A filter which allows a narrow band of frequencies to pass through the circuit and rejects or attenuates frequencies which are either higher or lower than the desired frequency. ANS. BANDPASS FILTER

176. A circuit that is used to block the passage of current for a narrow band of frequencies, while allowing current to flow at all frequencies above or below the this band. This type of filter is also known as a band suppression or band reject.

ANS. BANDSTOP FILTER

177. What theorem is used in solving electrical circuits with several voltage sources? ANS. SUPERPOSITION

178. What is the process of determining the magnitude of something in terms of a recognized standard? ANS. MEASUREMENT

179. A variable positive regulator. ANS. 317

180. What is the efficiency of a full wave rectifier? ANS. 81.2%

181. The value at any instant of time. ANS. INSTANTANEOUS VALUE

182. In carbon zinc battery, zinc serves as the ___. ANS. NEGATIVE CATHODE

183. The electronic the electronic transfer from one stage to another is called_____. ANS. COUPLING

184. Who discovered the magnetic effect? ANS. HANS CHRISTIAN OERSTED

185. One coulomb of charge has how many electrons. ANS. 6.25 X10^18

186. Energy gap of a semiconductor is? ANS. 1EV

187. What is the typical range of resistivity of semiconductor diode? ANS. 10X10^4

188. What do you call a semiconductor that is doped with both donor and acceptor impurities? ANS. COMPENSATED SEMICONDUCTOR

189. The resistance of a semiconductor is known as? ANS. BULK RESISTANCE

190. What is the maximum theoretical efficiency of a solar cell?

ANS. 22%

191. An advantage of alkaline cell over a zinc carbon cell ANS. AN ALKALI CELL WORKS AT LOWER TEMPERATURE

192. To deposit highly reactive material into a substrate, which of the following method is used? ANS. VACUUM EVAPORATION

193. Which breakdown theory is explains the action that takes places in a heavily doped PN junction with a reverse bias below 5 volts. ANS. ZENER EFFECT

194. The UJT conducts from base1 to (a) what point when it is forward biased and from (b) what point to base 2 when it is reversed biased? ANS. (A) EMITTER (B) EMITTER

195. The MOSFET is normally constructed so that it operates in either the depletion mode or the enhancement mode. The depletion mode MOSFET (a) uses what type of bias and (b) has what type of doped channel to cause a depletion of current carriers in the channel? ANS. (A) REVERSE (B) HEAVILY196. Which of the following circuits that is required in a multispeed servo system is NOT required in a single speed servo system?ANS.SYNCHRONIZER

197. Which of the following devices can be used as a position sensor in a servo system? ANS. POTENTIOMETER

198. In 74LSxxx,LS means ANS. LOW POWER SCHOTTKY

199. The size of empty folder is approximatelyANS. 1KB

200. Which is not a solid? ANS. SUPERCRITICAL

201. A compound of the elements gallium and arsenic used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared LED, laser diode, solar cells and optical window. ANS. GALLIUM ARSENIDE

202. A resistor marking of 4k7 has what value?

ANS.4.7KOHM

203. If the inputs of the OR gate are inverted with NOT gates, the overall gate is. ANS. NAND GATE

204. A paper capacitor generally has a shorter service life than most other types of capacitor.

This is a ____ statement. ANS.FALSE

205. Voltage drop is____ ANS. DIFFERENCE IN POTENTIAL BETWEEN TWO POINT

206. The slip speed of an induction motor is 100% until the rotor moves and then falls to a ____.ANS. LOW VALUE

207. A relay can be used to___. ANS. DECREASE THE CURRENT IN A CIRCUIT

208. Flow calorimeters are classified by the type of measurement performed, the type of heating used, and what other characteristic? ANS. TYPE OF CIRCULATION USED

209. Capacitance of a variable capacitor is maximum at ANS. MOVABLE PLATES ARE CLOSE TOGETHER

210. There is an attractive force between two parallel conductors when the current in them isANS. OPPOSITE IN DIRECTION

211. The speed in a generator is doubled while the flux is constant the generator EMF isANS. DOUBLE

212. Intrinsic semiconductor have ANS. COVALENT BONDS FORMING A TETRAHEDRAL STRUCTURE

213. If you are preparing to single lace conductors, what total length must the lacing be in a relationship be to the longest conductor ANS. 2 AND ONE HALF TIMES THE LENGTH

214. What causes the process called junction recombination to occur when N type and P type materials are joined together

ANS. DIFFUSION OF ELECTRONS AND HOLES MOVING ACROSS THE JUNCTION IN THE TWO MATERIAL

215. At typical silicon wafer has approximately (a) what diameter and (b) what thickness? ANS. (A) 2 INCHES (B) 0.01-0 .02

216. Each satellite in the iridium satellite network has how many spot beams? ANS. 48

217. False regarding a three phase induction motor ANS. THE SYNCHRONOUS SPEED IS INVERSELY PROPORTIONAL TO THE NUMBER OF POLES

218. In pure silicon ANS. THE HOLES AND THE ELECTRONS EXIST IN EQUAL NUMBERS

219. Effect of air gap in a magnetic circuit is ANS. INCREASE THE RELUCTANCE

220. All logic gates are made up of ANS. TRANSISTORS

221. Of the following tests, which is the most valid for checking a diode ANS. A DYNAMIC ELECTRICAL CHECK WITH A DIODE TEST SET222. Transformer secondary current is greater than the primary current in a step up transformer, this statement is a_______ statement ANS. FALSE

223. The most complex to produce and difficult to repair printed circuit boards are those made using which of the following methods ANS. LAYER BUILD UP METHOD

224. What part of a synchro provides a part for external connection?ANS. TERMINAL BOARD

225. When a capacitor is connected to a ac supply, the current ANS. LEADS THE VOLTAGE BY 90 DEGREES

226. What term defines the capacity of a soldering iron to generate and maintain a satisfactory soldering temperature while giving up heat to the joint being soldered?

ANS. THERMAL INERTIA

227. A battery consist of a ANS. NUMBER OF CELLS

228. What term is used to describe current pulses that flow in the same direction ANS. PULSATION DIRECT CURRENT

229. Which of the following test equipment is most accurate for measuring DC voltages ANS. DIFFERENTIAL VOLTMETER

230. In series mound generator running at constant speed as the load current increasesANS. THE TERMINAL VOLTAGE INCREASES

231. What type of bias is constant and improves thermal stability ANS. COMBINATION BIAS

232. The greater the internal resistance of a cellANS. THE LESS TERMINAL POWER DISSIPATION

233. A function table ANS. IS LIKE A TRUTH TABLE FOR SEQUENTIAL CIRCUITS

234. Elements penetrate the semiconductor substrate in (a) What type of IC but (b) do NOT penetrate the substrate in what type of IC ANS. (A) DIFFUSED (B) EPITAXIAL THE END USERS AND THE NETWORK

235. Vibrating reed meters and moving disc meters are primarily used to measure which of the following values: ANS. THE ROTATIONAL SPEED OF THE SYNCHRONOUS

236. What are the 2 general classifications of synchro system? ANS. TORQUE AND CONTROL

237. Why is flux used in the soldering process?Ans. IT ACTS AS A CLEANING AGENT TO REMOVE OXIDE

238. What type of AC motor uses a combination of inductance and capacitance to apply out-of-phase currents to the start windings

ANS. SPLIT-PHASE INDUCTION

239. The ability of a spectrum analyzer to resolve signals is limited by which of the following factorsANS. THE NARROWEST BANDWIDTH OF THE SPECTRUM ANALYZER

240. Capacitance is a ration of: ANS. POTENTIAL DIFFERENCE BETWEEN PLATES TO THE THICKNESS

241. Why is a lacing shuttle used when conductors are laced in bundles ANS. IT HELPS PREVENT THE CORD OR TAPE FROM FOULING

242. The process of causing the pressure in a liquid filled container to be reduced below the vapor pressure of the liquid causing the liquid to evaporate at a lower temperature than the normal ANS. VACUUM EVAPORATION

243. Materials that are engineered materials made from two or more constituent materials made with significantly different physical or chemical properties which remains separate and distinct on a macroscopic level within the finished structure.ANS. COMPOSITE MATERIAL

244. Vacuum evaporation and cathode sputtering are two methods used to produce which of the following types of components ANS. THIN FILM

245. Which of the following types of synchro devices provides a mechanical output? ANS. TORQUE RECEIVER

246. What is the most common range of value selected for a power supply choke? ANS. 1-20 HENRIES

247. An alternator using a gas turbine as a prime mover should have what type of rotor? ANS. TURBINE DRIVEN

248. Refers to the total opposition to currentANS. IMPEDANCE

249. Which of the following is an advantage of using a current probe?

ANS. IT SENSES CURRENT BY INDUCTION WITHOUT BEING CONNECTED DIRECTLY INTO THE CIRCUIT

250. If the flux per pole of an AC generator is increased, the speed ANS. DECREASES

251. The number of pole pairs required to established a rotating magnetic field in a multiphase motor stator is determined by which of the following factors? ANS. THE NUMBER OF PHASES

252. In most alternators, the output voltage is controlled by adjusting the ANS. FIELD VOLTAGE

253. The starting torque a simple squirrel cage motor is ____ANS. LOW

254. When an un biased pn juction formed, a ________ existsANS. CONTACT POTENTIAL

255. All components and interconnection are formed on or within a single substrate in which of the following unitsANS. INTEGRATED CIRCUIT

256. In a three-phase induction motor, which is falseANS. AS THE ROTOR IS LOADED, THE SLIP DECREASES

257. Assemblies are made up EXCLUSIVELY of discrete electronic parts are classified asANS. MINIATURE ELECTRONICS CIRCUITS

258. A neon lamp moved parallel to a two wire parallel transmission line will glow at its brightest at which of the following points ANS. MAXIMUM VOLTAGE POINTS

259. What components causes a generator to produce a DC voltage instead of an AC voltage at its output ANS. THE COMMUTATOR

260. What is meant by the term tinning? ANS. COATING THE MATERIAL TO BE SOLDERED WITH A LIGHT COAT OF SOLDER

261. Which has the greatest effect on the figure of merit on the circuit?ANS. RESISTANCE

262. PN junction are protected from contamination during the fabrication process by which of the following materials ANS. OXIDE

263. A voltmeter should be connected in an electrical circuit in what manner? ANS. PARALLEL TO THE LOAD

264. Which of the following configurations extends the range of a voltmeter? ANS. A RESISTOR IN SERIES WITH THE METER MOVEMENT

265. What is normally the front-to-back ration of a power rectifier? ANS. 10:1

266. What is the normally the front-to-back ration of a signal diode? ANS. 300:1

267. The number of characters in a record ANS. RECORD LENGTH

268. The range sweep in a range gate generator is started at the same time the transmitter fires.ANS. SYNCHRONIZER269. In a pulse radar system, what component controls timing throughout the system? ANS. SYNCHRONIZER

270. The frequency-measuring capability a digital multimeter can be extended using which of the following device. ANS. AN RF PROBE

271. Interconnection of two or more branches.ANS. NODE

272. A node with no division of current ANS. SIMPLE NODE

273. A node in which KCL is applicable. ANS. PRINCIPAL NODE

274. An LC bridge that can measure self inductance. ANS. MAXWELL-WIEN BRIDGE

275. Which of the following terms is defined as the amount of load a machine can turn? ANS. TORQUE

276. The UJT has which of the following advantage over the conventional transistor? ANS. INCREASED TEMPERATURE STABILITY

277. A module which is difficult to repair because it is completely imbedded in solid material is one which has been___ ANS. ENCAPSULATED

278. How should a single lace be started? ANS. WITH A SQUARE KNOT AND TWO MARLING HITCHES

279. Which of the following will apply to a moving coil instrument? ANS. EVEN SCALE MEASURING DC

280. Which of the following will apply to a moving coil rectifier instrument? ANS. EVEN SCALE MEASURING AC

281. Which of the following will apply to a moving iron instrument? ANS. UNEVEN SCALE MEASURING DC/AC

282. An instrument constructed to measure the number of tons within a medium (which we will consider to be gaseous. But can also be solid or liquid) ANS. IONIZATION CHAMBER

283. A brushless, synchronous electric motor that can divide a full rotation into a large number of steps. ANS. STEPPER MOTOR

284. A method of curve fitting using linear polynomials heavily employed in mathematics particularly numerical analysis and numerous application computer graphics. ANS. LINEAR INTERPOLATION

285. The simplest of all gas filled radiation detectors, and is used for the detection or measurement of ionization radiation. ANS. IONIZATION CHAMBER

286. The semiconductor doping impurities arsenic, antimony, and bismuth are classified as what type of impurities? ANS. PENTAVALENT