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CET

Krysty P Avionics CET Englisch 200 Karten

CET

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  1. 1When did the CET certification program begin?1965
  2. 2When did the ETA initiate Certification Maintenance?In 1996
  3. 3Are all ETA certification categories require the passage of the Associate CET Examination?No, this is a false statement.
  4. 4To qualify for MASTER CET, the examinee must attain a score of 85% on each separate exam?No, this is a false statement.
  5. 5An Associate CET cannot attempt one of the specialty examination.This is a false statement.
  6. 6The Master CET status is lifetime and does not require certificate maintenance.This is a true statement.
  7. 7Explain The Journeyman Level:-Denotes competency in one specialized area.
    - Requires 75% passing.
    - Requires 2 years of work or school.
  8. 8Certification maintenance requires a payment of a fee and retesting or proving 40 hours of upgrade retraining within a four year period.This is a true statement.
  9. 9A worker may become certified by ETA as a CST( Computer Service Technician) without also becoming certified as a CET.This is a true statement.
  10. 10The Associate CET exam maybe taken after the Journeyman exam.This is a false statement. The Associate CET exam must be taken prior to the Journeyman exam.
  11. 11B+, or supply voltages in electronic products, are considered to be:+12 to 300 VDC
  12. 12Leakage current in an electronic product, between either of the AC power cord conductors, and the chassis or any exposed metal parts should not exceed_____________.500 microamps
  13. 13Shaded components on a electronics schematic means:Only exact replacement parts may be used.
  14. 14Ingested solder fumes or particles____________.Are toxic.
  15. 15Second degree skin burns should_______________.Not be treated with ice or bandage pack.
  16. 16Rules describing the fire or toxicity retardant types of cabling which may be installed in buildings is contained in_________________________.NEC Article 770
  17. 17ESD and static discharge is most destructive to________________.CMOS semiconductors.
  18. 18If you have never received formal training and practiced CPR on a person or dummy, on the event of finding a fellow worker not breathing, you ________________________.Should not attempt it, but call for help.
  19. 19When working at heights above 6 ft, a ______________________ is required by OSHA rules.Full body harness attached to lanyard which prevents more than a 6'drop.
  20. 20Residual voltage is associated with _________________________.Charge retained by inductors.
  21. 21The atomic number of an element is the same as the element's atomic weight.This is a false statement.
  22. 22The ampere expresses__________________.A unit of charged movement per second , past a given point.
  23. 23The total resistance of a parallel circuit containing equal branch resistance is found by:By dividing the resistance value of a branch by the number of branches.
  24. 24An open found in the series connected load of the transistor amplifier circuit as shown. If the voltmeter were connected from the open side of the resistor (top point of the open as shown) to ground, what will be the reading?-12 VDCAn open found in the series connected load of the transistor amplifier circuit as shown. If the voltmeter were connected from the open si...
  25. 25voltage is the drop across the 2000 ohm resistor as shown in the amplifier?8.0 VDCvoltage is the drop across the 2000 ohm resistor as shown in the amplifier?
  26. 26If there is no OPEN in the circuit, what is the voltage across the 3000 ohm emitter resistor as shown?None of the options are the given answer.If there is no OPEN in the circuit, what is the voltage across the 3000 ohm emitter resistor as shown?
  27. 27A 12 VDC power supply has a 15 ohm internal resistance. What load resistance can be connected to transfer maximum power?15 ohms
  28. 28Does Maximum power transfer occurs when the load impedance is equal to the source impedance?This is a true statement.
  29. 29What is current through the resistor in the schematic shown?2 AmpsWhat is current through the resistor in the schematic shown?
  30. 30What is the current through the resistor in this schematic shown?24 WattsWhat is the current through the resistor in this schematic shown?
  31. 31What will happen to the current through a resistor if the resistor value increases?Current decreases
  32. 32Which type of circuit has the same voltage drop across each component?Parallel Circuit
  33. 33Total power in a series circuit is determined by the :Source voltage times the current.
  34. 34Which is the equivalent to 100 microamps?1 milliamps
  35. 35If the current drain from the battery is 4 mA, what resistance is the rheostat in the drawing?2.5 k ohmsIf the current drain from the battery is 4 mA, what resistance is the rheostat in the drawing?
  36. 36In the circuit show, how much current id flowing in R2?1 AmpIn the circuit show, how much current id flowing in R2?
  37. 37A resistor ________________.in a circuit causes a voltage drop from one end of the resistor to the other end.
  38. 381 K ohm is the same as _______________.1 thousand ohms.
  39. 39A resistor has color bands orange, red, and brown. Its value is _____________.320 ohms.
  40. 40A circuit has one 500 ohm resistor in series with three 500 ohm resistor that are connected in parallel with each other. The total resistance would be _______________.666 ohms
  41. 41The voltage rating of a capacitor __________________.Relates to the maximum voltage that should be applied to it.
  42. 42Calculating the total capacitance of several capacitors connected in parallel ______________________.is done by adding each of the capacitance values.
  43. 43What is ferrite ?Ferrite is a common inductor core material.
  44. 44The term Henry refers to _________________.The inductive property of a coil.
  45. 45A certain transformer has 250 turn in the primary winding and 1250 turns in the secondary winding. The turns ratio is ___________.0.2
  46. 46When the turns ratio of a transformer is 10 the primary AC voltage is 8v, the secondary voltage is ____________.0.8 volts
  47. 47Which of these color code patterns is found in a 270 ohm 5% resistor?Red, Violet, Brown and Gold
  48. 48One micro-farad is equivalent to ______________ picofarads.1,000,000
  49. 49The capacitance of a capacitor with 10 microC of electric charge and 100 v across its plates is ____________.0.1 micro farad
  50. 50The total impedance in a series circuit is found by?It found by finding the net reactance and the net resistance, square each separately , add them together and then find the square root of the sum.
  51. 51In a series AC circuit with a resistor, inductor and capacitor, each with the same resistance or reactance, a voltmeter measuring each individual voltage drop you would find:The voltage equal to eachother.
  52. 52Which of the following are characteristics of a series circuit and which is not ?Characteristic: -Circuit components have a division of the supply voltage.
    -All components share one current.
    - Energy is shared by reactive devices.
    Non-Characteristic: There is a different level of current in the reactive components than in the resistive components.
  53. 53In an AC circuit, as the applied voltage frequency changes upward, the inductive reactance in the circuit will:Increase
  54. 54In an AC circuit, as the applied voltage frequency increases the capacitive reactance in the circuit will:Decrease
  55. 55A 50 kHz AC voltage is applied to a 10 mH inductor, its reactance at this frequency is :3,140 Ohms
  56. 56A .1 micro farad capacitor in a circuit with a frequency of 100 kHz applied, has a reactance of :15.9 ohms
  57. 57In a series circuit when the inductive reactance equals the capacitor reactance, the circuit has __________ impedance.Minimum
  58. 58In a parallel circuit when the inductive reactances equal the capacitor reactances, the circuit has __________ impedance.Maximum
  59. 59Resonance is when ___________________.The total of the inductive reactances in the circuit equal the total of all capacitive reactances.
  60. 60__________________ cells are prone to battery memory.NiCad
  61. 61A conducting loop in motion through magnetic lines of flux has a current induced in it. The physical law that explains this is what?Lenz's Law
  62. 62An AC generators is also known as a ____________________.Alternator
  63. 63Three -phase power is obtained from an AC generator by wiring the armature windings in a ________ or ____________ configuration.Delta or Wye
  64. 64What element of a DC generator distinguishes it from an AC generator?Commutator
  65. 65What type of motor will speed dangerously out of control if not physically loaded?Series wound DC motor
  66. 66AC motor speed depends on _____________.The frequency of the voltage applied to it.
  67. 67Series wound AC motors have strong torque from a dead stop. This makes them ideally suited for use in small appliances.This is a true statement.
  68. 68What element of a synchronous AC motor provides start up torque for the motor?Squirrel Cage
  69. 69An AC induction motor require what to operate?Slip
  70. 70What happens to the value of a capacitor if the spacing between plates decreases?Increases the value of the capacitor.
  71. 71What does a sine wave look like?What does a sine wave look like?
  72. 72The peak-to-peak voltage of the waveform is :14 voltsThe peak-to-peak voltage of the waveform is :
  73. 73In this circuit shown, the circuit will require how many RC time constants to charge the capacitor to 63% of the applied voltage?1 RC Time constantIn this circuit shown, the circuit will require how many RC time constants to charge the capacitor to 63% of the applied voltage?
  74. 74A variable capacitors plate can ope or close. As the plate opens, capacitance __________.Decreases
  75. 75An inductor with the same length of wire but whose turns are spaced further apart will have:Less inductance.
  76. 76What frequency will this parallel LC circuit be resonant to?159 HzWhat frequency will this parallel LC circuit be resonant to?
  77. 77Which formula is used to calculate reactance in the schematic shown?Which formula is used to calculate reactance in the schematic shown?Which formula is used to calculate reactance in the schematic shown?
  78. 78An inductor in an electrical circuit:Opposes the flow of AC current.
  79. 79The term for the combination of resistance and reactance that restricts the flow alternating current is:Impedance
  80. 80Is the value of a 500 picofarad capacitor and a .5 nanofarad capacitor identical?This is a true statement, they are identical.
  81. 81In a generator, a DC voltage applied to the field windings controls the output level.This is a true statment.
  82. 82What is the tolerance within a resistor color coded red, black, red and gold?1,950 ohms
  83. 83What is a common description of the filter shown?Low Pass T filter.What is a common description of the filter shown?
  84. 84What is the combined reactance of the two capacitors in series in this drawing?Approximately 1,198 ohmsWhat is the combined reactance of the two capacitors in series in this drawing?
  85. 85What will cause a generator to produce DC voltage rather than AC voltage?The commutator.
  86. 86Total capacitance of a capacitors connected in parallel is like:Resistors connected in series
  87. 87what factor determines the value of a capacitor?The area of the plates.
  88. 88A 3/8- inch diameter by 3/16 inch ceramic disk capacitor marked " 47 " is most likely what value?47 picofarad
  89. 89What happens to current flow in a capacitor when DC voltage across it has increased to the applied voltage?Little current flows.
  90. 90Decreasing the inductance in a series turned circuit will cause the resonant frequency to?IncreaseDecreasing the inductance in a series turned circuit will cause the resonant frequency to?
  91. 91The filter configuration that is shown below is commonly called:A "PL" FilterThe filter configuration that is shown below is commonly called:
  92. 92The sine wave that is shown, is at what frequency?500 HzThe sine wave that is shown, is at what frequency?
  93. 93A high current MOV device would most likely be found?In a surge suppressor.
  94. 94What would most likely be used as a signal amplifier?Triode
  95. 95A capacitor and a resistor in series would be used in a signal line to :Reduce or short signals above a certain frequencies.
  96. 96The component used to control the functions of an electronic device, most likely be referred to as:Microprocessor
  97. 97A capacitor would most likely be rated:rated a .05 microfarad
  98. 98What is true of an PNP transistor?A negative voltage will be applied to the collector.
  99. 99An advantage a transistor has over vacuum tube triode is:.A transistor normally has a longer life.
  100. 100The most likely use of a transformer would be:To couple signals from one circuit to another.
  101. 101Which applies mostly to a " balun"?Impedance matching device.
  102. 102DIP refers to:Dual Line Package
  103. 103Diodes are marked with a band at the __________endCathode
  104. 104In testing a germanium diode , a forward - to- reverse ratio of 10 : 1 is indicative of a good diode?No, this is a false statement.
  105. 105To properly bias a NPN silicon signal amplifier amplifier transistor, which voltages appear correct for a signal amplifier (SI)?E = 0 ; B = +.7 ; C = 10
  106. 106To proper;y bias a PNP transistor which voltages appear proper (SI)?E = -1 ; B = -1.7 ; C = -10
  107. 107In a transistor, which section is made very thin compared with the other two?Base
  108. 108Which part of a transistor carries the most current?The emitter
  109. 109The primary difference between a NPN and a PNP transistor is?DC voltages are reversed.
  110. 110Which transistor circuit normally produces the largest voltage gain?Common Base
  111. 111Name one safety precaution taken before replacing a transistor.Short emitter to base, to remove discharge voltage.
  112. 112Zener diode and varactor diodes are usually ___________ biased.Reverse meaning the positive voltage connects to the N material.
  113. 113A BGA chip has?Solder balls underneath.
  114. 114Troubleshooting discrete circuit's involves a knowledge of ________________.Circuit function and how it failed.
  115. 115SMT stand for?Surface Mount technology.
  116. 116When replacing a DIP chip, __________.Use an ESD static grounded soldering pencil or work station.
  117. 117One area where technicians will find discrete electronic components is __________.RF equipment
  118. 118What basic circuit parameter makes it difficult to build integrated circuits with a high number of components to operate at super high frequencies?Shunt Capacitance
  119. 119When troubleshooting equipment that is software controlled, ____________.Use of a computer may be required.
  120. 120A category 2 type of electronics equipment could be a ____________________.Fax Machine
  121. 121An example of a solid state device is ___________.Silicon Diode
  122. 122A four layer PN device is classified as a __________________.Thyristor
  123. 123How is a fuse installed in a circuit to insure proper operation?In series with the load.
  124. 124A negative temperature coefficient thermistor will:Decrease in resistance with temperature.
  125. 125A NiMH battery cell, when charged , has a terminal voltage of______?1.2 volts
  126. 126A thermocouple has an output in the range of____________.Millivolts
  127. 127Germanium Diodes:Have 0.3 forward voltage drop.
  128. 128A MOSFET :Has high input impedance.
  129. 129Integrated Circuit Packages:Reduce space requirements.
  130. 130Which of the silicon diodes shown will conduct, given the voltages applied?Which of the silicon diodes shown will conduct, given the voltages applied?Which of the silicon diodes shown will conduct, given the voltages applied?
  131. 131If the gate voltage level, that turns an active SCR on, drops below the trigger point, while anode and cathode voltages are maintained, what will occur?The SCR will stay on.
  132. 132Name the transistor configuration that is shown:NPNName the transistor configuration that is shown:
  133. 133What is the effect on a varactor (varicap) when the reverse bias voltage is increased?Capacitance decreases and the tuned frequency increases.
  134. 134An electronic power supply may be designed to ___________.- Change DC to AC
    - Change AC to AC
    - Change the frequency
    - Change AC to DC
  135. 135In the normal layout (block diagram) of a DC power supply the order of the section would be:Rectifier, Filter, Regulator
  136. 136This section of the DC power supply changes AC into pulsating DC.Rectifier
  137. 137This section of the the DC power supply would step - up or step- down voltage.Transformer
  138. 138This section of the DC power supply would provide a steady DC voltage to the system.Regulator
  139. 139The zener diode is the most important component in this section.Regulators
  140. 140A ripple frequency of twice the AC frequency is normally associated with:A full wave rectifier.
  141. 141Changing the filter capacitor from 10 mF to 50 mF would result in :A lower ripple voltage.
  142. 142The ripple frequency of the output of a full wave rectifier power supply measures the same as the AC input . The section causing this problem is the______________________.Rectifier
  143. 143The ripple voltage is higher than the specifications, but the frequency is correct. The section containing the problem is the _______________.Filter
  144. 144—Power SupplyPower Supply
  145. 145The switching power supply used in a PC takes the input from the AC line and changes it to _____________.A higher frequency.
  146. 146—Amplification factor of the vacuum tube.Amplification factor of the vacuum tube.
  147. 147A class AB amplifier will allow output current to flow for approximately ____________ of the input signal.280degrees
  148. 148—Voltage gain of the JFET amplifier.Voltage gain of the JFET amplifier.
  149. 149Name three amplifier configurations that yield the highest power gains.1. Common-cathode
    2. Common- source
    3. Common- emitter
  150. 150—5050
  151. 151Which amplifier configuration(s) would you most likely find being used in a linear push-pull arrangement?Class B or AB
  152. 152—455 kHz,1.02 MHz, 1.475 MHz, 2.495 MHz455 kHz,1.02 MHz, 1.475 MHz, 2.495 MHz
  153. 153What term is associated with a commercial receiver being able to reject image frequencies?Selectivity
  154. 154This figure illustrates what?An active detector.This figure illustrates what?
  155. 155Which type of circuit can be used to recover audio from an IF in a FM receiver?Phased Locked Loop
  156. 156What voltage is present at point A?12.3 VWhat voltage is present at point A?
  157. 157The output (A) of the regulator circuit shown should be about______?8.5 VDCThe output (A) of the regulator circuit shown should be about______?
  158. 158In the circuit shown, to reproduce the square wave input more faithfully at the output:increase the value of the resistor.In the circuit shown, to reproduce the square wave input more faithfully at the output:
  159. 159What voltage would be expected at point A if 117 volt AC were applied?15.5 V DCWhat voltage would be expected at point A if 117 volt AC were applied?
  160. 160What voltage is expected across the secondary of T 1 transfer if the circuit is connected to 117 VAC?11.7 VACWhat voltage is expected across the secondary of T 1 transfer if the circuit is connected to 117 VAC?
  161. 161How do you calculate the gain of a non-inverting operational amplifier?How do you calculate the gain of a non-inverting operational amplifier?
  162. 162If the broadband input signal to the Op-amp increases, then the output signal _____________?Decreases
  163. 163When the measuring power to a speaker, doubling of the power represents a 6 db increase.This is a false statement.
  164. 164The input of the Op-amp shown is a .5 V sine wave( centered about +2 V). What will the output be?It would be a 1 V sine wave centered about -1 V.The input of the Op-amp shown is a .5 V sine wave( centered about +2 V). What will the output be?
  165. 165What is wrong with the circuit shown?Diode grounds are shorting.What is wrong with the circuit shown?
  166. 166What does the acronym FCC mean?Federal Communications Commision
  167. 167What is not part of a superheterodyne radio receiver?Audio Radiation Resistance Circuit.
  168. 168What does these acronym stand for: a. RF , B. AF , C. IF , D. FM, E. AM, F. WxRF-Radio Frequency, AF- Audio Frequency, IF- Intermediate Frequency, FM- Frequency Modulation, AM- Amplitude Modulation and Wx- Weather( no chapter reference).
  169. 169Which part of a superheterodyne receiver rectifies the RF carrier?Detector Circuit
  170. 170How long should a 1/4 wavelength vertical antenna be that is designed for operation on 146 MHz?1.6 Feet
  171. 171What is the common impedance of radio communication and television coaxial50 and 75 ohms
  172. 172Which layer of the ionosphere absorbs high frequency radio waves during daylight hours?D layer
  173. 173Which style of antenna radiates in opposite directions, with a pattern resembling a figure 8?Which style of antenna radiates in opposite directions, with a pattern resembling a figure 8?
  174. 174What frequency band is an average AM commercial broadcast radio capable of receiving?535 to 1,700 kHz
  175. 175Why is RF safety important?To limit human exposure to RF for health reasons.
  176. 176What is the process of imposing intelligence on a carrier wave?Modulation
  177. 177The basic formula for wavelength is L = wavelength, V = Velocity, f = Frequency.L = V/f
  178. 178Flexible coaxial transmission lines are ideal for what frequencies?Below GHz
  179. 179Standing waves occur on a transmission line when there is a/an ______________ between the transmission line and the load.Impedance mismatch
  180. 180Maximum power transfer to the load occurs when the load impedance matched that of the transmission line.This is a true statement.
  181. 181Antenna resonance is the characteristic that permits ___________radiation of the transmitted signal.Maximum
  182. 182Space waves are ideal for what frequency of communications?Line of sight UHF.
  183. 183Electromagnetic field polarization is determined by orientation of what part of the electromagnetic wave?Electric lines of force.
  184. 184The orientation of the transmitter antenna and the receiver antenna must match for ideal reception.This is a true statement.
  185. 185Quarter-wave antennas must be ________ at one end for resonance at the desired frequency.Grounded.
  186. 186On hook DC voltage on a telephone local loop is _____________.- 48 Volts
  187. 187Dial tone is compromised of these two frequencies?350 + 440 Hz
  188. 188The DTMF tones for the number 5 on a telephone keypad is ______________.770 +1336 Hz
  189. 189A trunk connects ___________.to two central offices.
  190. 190The form of signaling used on telephone systems today is _______________.CCS
  191. 191CLEC is ___________.A cable T.V. company or a wireless provider.
  192. 192The maximum bit rate available on a T - 1 transmission is ______________.1.544 Mbps
  193. 193A call between area code is ______________.Inter- LATA
  194. 194The device that causes the phase change between mouth and ear audio in a telephone subscriber unit is the__________.Hybrid coil
  195. 195Oscillators use quartz crystals that generate output by the:Piezoelectric effect
  196. 196Analog telephone lines have what Dc voltage level across the tip and ring when off-hook?- 48 VDC
  197. 197The velocity factor in a transmission is:Compared to free space velocity.
  198. 198Cable of different impedances maybe combined for short runs.This is a false statement.
  199. 199The bandwidth of a standard analog T.V. signal is:88 MHz
  200. 200What do radio receiver section determine the radio's inherent noise level?RF

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CET Avionics Karteikarten am CET , erstellt von Krysty P am 16/09/2020.
Erstellt von
Krysty P
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  • Erstellt von Krysty P · 9 Sep 2020
  • Kopiert von Krysty P · 16 Sep 2020
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