This is the Section 2 Module 18 of the compiled Electronics Review Materials taken from different sources including but not limited to Electronics books, past Board Exams Questions, Journals and the Internet. This particular reviewer in Electronics Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Electronics Engineering Reviewers: Section 2 Module 18
1. IGBT – high voltage applications
2. In parallel AC alternators, voltage is changed by – varying field excitation
3. In parallel AC alternators, frequency is changed by – varying rpm of the prime movers
4. HASHING – applied to a KEY
5. Photodiode internal resistance when light is applied – decreases when reverse-biased
6. Connect computers – Network
7. Connecting Wide Network – Backbone
8. Data encryption that prevents theft – DES
9. Synchronous AC motor – dc generator + dc field excitation ( longest answer )
10. 6 lead acid – 12V
11. 9V flat battery – 6 batteries in series
12. Silver cadmium battery – 1.05V
13. Centralized processing system - A teleprocessing system
14. Cascode configuration – Common Emitter and Common Base ( in order, “CB and CE” is included in the choices)
15. High starting torque – dc series motor
16. A need for sudden high torque of short periods – cumulatively compound motor
17. Cumulatively compound motor doesn’t run wildly/widely @ low inputs due to – SHUNT resistor
18. Digital recorded message recorded and sent to others – voice mail
19. Comparator with hysteresis – has 2 trigger points
20. CMOS – n-channel & p-channel
21. 20 db roll-off rate – is equivalent to a change with a factor of 10 every decade
22. Feedback pair – NPN and PNP
23. Used after op-amp to adjust output – level-shifter
24. Level shifter – used to adjust output of op-amp to 0 volts when input is 0V
25. How is Common Gate (CG) different from CS and CD (FETs) – lower input impedance
26. Program that will attack given certain conditions - bomb
27. Uses hierarchal method for searching – Gopher
28. Barcode is an example of an – input device
29. Barcode - UPC
30. Instrumentation devices used at – high noise environments/devices
31. Differential gain divided by common mode gain – CMRR
32. . . . - Frequency Response
33. When an op-amp has zero input its ideal output is – 0V
34. Frequency where 0.707 of the output voltage occurs – break frequency
35. . . . – Critical Frequency
36. . . . – Coupling Capacitor
37. Capacitive Divider – Colpitts oscillator
38. RC network … - Relaxation Oscillator
39. The approximate value of the bias-input op-amp . . . – parallel combination of the feedback and input resistors
40. High speed attained by – parallel processing
41. Connecting LANs thru the internet protocol – IP Switch
42. Q point of Class C amplifier – below cut-off
43. Q point of Class AB amplifier – slightly above cut-off
44. Class B most prone to - Crossover Distortion
45. Class A has the – least distortion
46. Distortion occurring when not all frequencies passed – Amplitude distortion
47. Distortion occurring when the signal output is not produced linearly as the input – Non-linear Distortion
48. First browser to be invented – Mosaic
49. Copper loss amounts to __% of the loss – 85%
50. Which of the losses is the most in motors – Copper loss
51. Transformer is efficient because it is – a static device
52. Birthplace of the World Wide Web – CERN
53. To increase drain current – decrease gate-to source voltage
54. In a push pull configuration ICQ must be – equal to the current in the bias and feedback resistors
55. FM IF – higher then AM IF
56. Discriminator or detector – recognizes audio signal
57. Insulting messages – flaming
58. Getting password – social engineering
59. Low input offset op-amp voltage – 0.2mV
60. DIP or Dual-in-Line Packaging – TO-116
61. RAID - Data Mirroring
62. Usually computer threats are – discovered accidentally
63. Lagging p.f. of 0.8 will have ____ voltage regulation than at unity power factor – greater
64. Difference between MOSFET and JFET – JFET has a pn junction
65. When a triangular wave is fed to a differentiator the output is a – square wave
66. The usual input to electric switching devices – square wave
67. The armature always generates – Alternating Current
68. The amount of time it takes the arm track device . . . – seek time
69. Dirt in the commutator results to – excessive sparking
70. 4-layer junction device will conduct if – forward break over voltage exceeded
71. In a voltage divider, if the resistor connected to ground is removed before a transistor – it will be driven into saturation
72. Double ended diff amp – opposite polarity applied to input
73. Single ended diff amp – one input grounded, other input has a signal
74. Op amps usually driven by dual polarity source but can also be operated by a single polarity source if – voltage is supplied to a reference voltage
75. Ideal op-amp – has high input impedance
76. . . . – decrease the capacitance, wider its bandwidth
77. Voltage produced if there is – relative motion between conducting wires and magnetic field
78. Zener diode at 3.6V will be at the – ZENER BREAKDOWN (not avalanche breakdown)
79. Self Biased JFET connected to – 0V (not ground)
80. The pulse from a multivibrator is controlled by the – resistors and the capacitors
81. OTA – transconductance & load resistor
82. . . . (having to do something with itself, ganyan context nung question) – polymorphism
83. In Parallel AC generators the ____ is important – phase angle
84. Average DC voltage in a full wave bridge type rectifier – 0.636Vmax
85. When a transistors is in cut-off or saturation it acts like a – switch
86. When a PC is treated like a terminal – Emulation
87. When a server has access to all clients – client / server network
88. Difference of SCS from SCR – SCS has 2 gates
89. Frequency controlled thru changing the voltage – VCO
90. Purpose of the damper windings – prevent hunting
91. Before updating sequential . . . it is – Sorted
92. Contains memory of browsing – cookie file
93. Processing transactions in groups is called – batch processing
94. Key factor in installation that has meet with disaster – a loss of processing ability
95. When the op-amp can be controlled thru external resistors – programmable op-amp
96. Used so that the incoming signal will not interfere to the transmitting signal – Transponder
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