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This document contains 71 multiple choice questions related to electronics concepts and components. The questions cover topics such as: electron derivation, voltage, modulation, current flow direction, units of power and resistance, resistor types, tools used for soldering and circuit work, transistor components, capacitors, diodes, transformers, rectifiers, and basic radio components.

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1.THE WORD ELECTRON WAS DERIVED FROM THE GREEK ELECTRON WHICH MEANS ______. A. TO RUB B. TO FLOW C. AMBER D. FRICTION
2. THE PEAK TO PEAK VOLTAGE IN A 117 VAC OUTLET IS _______. A. 620 V B. 165.5 V C. 331 V D. 220 V
3. WHICH IS A TYPE OF MODULATION WHERE THE AMPLITUDE OF THE CARRIERS IS CHANGED IN ACCORDANCE WITH DEMODULATING SIGNAL? A. FM B. PDM C. AM D. PCM
4. THE ACTUAL OF FLOW OF CURRENT IS FROM ______. A. NEGATIVE TO POSITIVE B. POSITIVE TO NEGATIVE C. POSITIVE TO POSITIVE D. NEGATIVE TO NEGATIVE
5. THE RATE OF DOING WORK IS CALLED _______. A. ENERGY B. POWER C. VOLTAGE D. RESISTANCE
6. MILIHENRY IS EQUAL TO _____. A. 10TH HENRY B. 100TH HENRY C. 1000TH HENRY D. 1000000TH HENRY
7. AN INDUCTOR OPPOSES ANY CHANGE IN ______. A. VOLTAGE B. CURRENT C. FREQUENCY D. MODULATION
8. A CIRCUIT HAVING TWO OR MORE CURRENT PATHS IS ____ CONNECTION. A. PARALLEL B. SERIES C. SERIES-PARALLEL D. CONNOT DE DETERMINED
9. WHICH IS AN ELECTRICAL UNIT OF MEASURING A POWER? A. OHMS B. AMPERE C. WATT D. VOLT
10. A CATEGORY OF A RESISTOR WHICH OBEY OHM'S LAW IS ______. A. LINEAR B. NON LINEAR C. POTENTIOMETER D. RESISTANCE
11. WHICH IS AN ELECTRONIC DEVICE THAT IS USED TO LIMIT OR OPPOSE THE FLOW OF CURRENT IN A CIRCUIT? A. CAPACITOR B. RESISTOR C. DIODE D. INDUCTOR
12. AN INSTRUMENTS THAT IS USED TO MEASURE THE AMOUNT OF RESISTANCE IN A CIRCUIT IS CALLED ______. A. DC VOLTMETER B. OHMETER C. AC VOLTMETER D. AMMETER
13. SOLDER IS A MIXTURE OF _____. A. TIN LEAD B. ZINC AND LEAD C. ZINC AMD TIN D. COPPER AND LEAD
14. THE COMMONLY USED SOLDERINB LEAD IS ______. A. 40-60 B. 60-40 C. 50-50 D. 50-40
15. A STANDARD 220VAC HAS A FREQUENCY OF______. A. 45HZ B. 30HZ C. 50HZ D. 60HZ
16. A LOW FREQUENCY SPEAKER IS SOMETIMES KNOWN AS ______. A. TWEETER B. SQUEAKER C. WOOFER D. HOWLER
17. THE THREE LEADS OF A COMMON TRANSISTOR ARE A/AN ______. A. COLLECTOR BIAS EMITTER B. EMITTER COLLECTOR BAIS C. BASE COLLECTOR CASE D. COLLECTOR BASE EMITTER
18. CONNECTING LEAD FROM THE NEGATIVE TO THE POSITIVE OF A BATTERY WILL PRODUCE A/AN ______. A. HIGH RESISTANCE CIRCUIT B. LOW CURRENT PATH C. SHORT CIRCUIT D. OPEN CIRCUIT
19. WHAT IS THE APPROXIMATE CHARACTERISTIC VOLTAGE THAT DEVELOPS ACROSS A RED LED? A. 1.7 V B. 0.6 V C. 3.4 V D. 6 V
20. IF TWO RESISTOR ARE PLACED IN SERIES, THE FINAL RESISTANCE IS _____. A. HIGHER B. LOWER C. THE SAME D. CANNOT BE DETERMINED
21. A 100N CAPACITOR IN PARALLEL WITH 10N PRODUCE _____. A. 90N B. 110N C. 100N D. CANNOT BE DETERMINED
22. THE RESISTOR IN PARALLEL WITH 10K PRODUCES _____. A. 10K B. 20K C. 5K D. CANNOT BE DETERMINED
23. THE 2 PCS OF 3V BATTERIES ARE CONNECTED IN SERIES. THE OUTPUT VOLTAGE IS ______. A. 3V B. 6V C. OV D. CANNOT BE DETERMINED
24. AN ELECTRIC DEVICE THAT IS USED TO LIMIT OR OPPOSE THE FLOW OF CURRENT IN A CIRCUIT IS CALLED ____. A. CAPACITOR B. RESISTOR C. DIODE D. INDUCTOR
25. WHICH TOOL IS NEEDED IN REMOVING SOLDERING ELECTRONIC COMPONENTS IN THE CIRCUIT BOARD? A. LONG NOSE PLIERS B. DESOLDERING PUMP C. DIAGONAL CUTTING PLIERS D. WIRE STRIPPER
26. WHICH TOOL IS USED IN JOINING OR SOLDERING ELECTRONIC COMPONENTS IN THE CIRCUIT BOARD? A. SOLDERING IRON B. ELECTRICAL PLIERS C. DESOLDERING PUMP D. LONG NOSE PLIERS
27. WHICH TOOL IS USED TO HOLD OR PICK UP COMPONENTS IN THE CIRCUIT BOARD? A. MECHANICAL PLIERS B. LONG NOSE PLIERS C. ELECTRICAL PLIERS D. WIRE STRIPPER
28. WHICH TOOL USED IN TURNING SHORTTED SCREWS? A. FLAT SCREW DRIVER B. PHILLIPS SCREW DRIVER C. ELECTRICAL PLIERS D. WIRE STRIPPER
29. which is a convenient pocket-sized tool that provides maximum safety when pulling cartridge fuses and electrical connections? A. fuse puller B. screw driver C. desoldering tool D. mini drill
30. THE RESISTOR IDENTIFIED AS R1 IS CALLED______. A.base bias resistor B.emitter feedback resistor C.load resistor D.bypass resistor
31. THE LEAD MARKED WITH THE ARROW IS THE ______. A. COLLECTOR B. EMITTER C. BASE D. FORWARD
32. THE CLOSET VALUE FOR THIS COMBINATION IS _____. A. 33 OHMS B. 40 OHMS C. 35 OHMS D. 10 OHMS
33. THIS STAGE IS CALLED _____. A.common base B.common emitter C.common collector D.emitter follower
34. THE FOUR SYMBOLS GIVEN BELOW ARE ______. A. CAPACITOR, SPEAKER, POTENTIOMETER, ELECTROLYTIC B. ELECTROLYTIC, SPEAKER, RESISTOR, CAPACITOR C. CAPACITOR, PIEZO, RESISTOR, ELECTROLYTIC D. ELECTROLYTIC, COIL, RESISTOR, CAPACITOR
35. THE RESISTOR IDENTIFIED AS R2 IS CALLED _____. A. BASE BIAS RESISTOR B. LOAD RESISTOR C. EMITTER FEDDBACK RESISTOR D. BYPASS RESISTOR
36. NANE THE FOUR COMPONENTS. A. TRIAC, DIAC, LED, ZENER DIODE B. ZENER DIODE, LED, TRIAC, SCR C. ZENER DIODE, LED, SCR, TRIAC D. ZENER DIODE, TRIAC, SCR, LED
37. A CAPACITOR AND COIL IN PARALLEL IS CALLED A ____CIRCUIT. A. TUNED B. TIMING C. SCHMITT D. DECAY
38. WHAT IS THIS SYMBOL? A. OP AMP B. INVERTER C. SHMITT D. BUFFER
39. IF A 10K RESISTOR IS PLACED ACROSS A 10 V SUPPLY, THE CURRENT WILL BE ______. A. 10 mA B. 0.001 mA C. 1 mA D. 65 mA
40. A DISADVANTAGE OF LCD (LIQUID CRYSTAL DISPLAY) IS ____. A. HIGH CURRENT DEMANDS B. SLOW REACTANCE TO INPUT C. ENVIRONMENTAL TEMPERATURE SENSITIVITY D. PERSISTENCE LIMITATIONS
41. WHICH IS TRUE OF A SERIES DC MOTOR WITH NO LOAD? A. TENDSTO STOP OR NOT START B. MAYBE DAMAGED BY EXCESSIVE SPEED C. HAS REVERSE DIRECTION D. BECIMOS AN AC GENERATOR
42. A FUSE MARKED 250V, 650M CAN BE USED IN CIRCUITS WITH AN “OPEN- FUSE” SSUPPLY VOLTAGE OF _____. A. 125 VOLTS B. 500 VOLTS C. 5000 VOLTS D. 250 VOLTS
43. TO PREVENT TRANSISTOR FROM GETTING HOT, USE _____. A. SILICON GREASE B. INSULATOR C. HEAT SINK D. EXHAUST FAN
44. TO OBTAIN A HIGHER VALUE OF RESISTANCE, RESISTOR ARE _____. A. REVERSE B. PARALLEL C. FORWARD D. SERIES
45. WHICH FUSE HAS ITS INTERNAL FUSIBLE WIRE WRAPPED AROUND AN INSULATOR? A. A LOW-BLOW TYPE FUSE B. AN INDUCTIVE FUSE C. A CAPACITIVE FUSE D. INTENDED FOR HIGH VOLTAGE FUSE
46. WHICH WOULD BE CONSIDERD “BASIC COMPONENTS OF A POWER SUPPLY? A. ZENER, REGULATOR, TRANSFORMER B. REGULATOR, DIODE, AC POWER, LOAD C. TRANSFORMER, BRIDGE, CAPACITOR, LOAD D. FILTER, REGULATOR, RECTIFIER, TRANSFORMER
47. WHICH PRESENTS THE RISE AND FALL OF ALTERNATING CURRENT AND VOLTAGES? A. GRAPH B. SINE WAVE C. FLUCTUATION D. CYCLE
48. WHEN TWO CAPACITOR ARE CONNECTED IN PARALLEL THE CAPACITANCE WILL A. INCREASE B. HAVE THE SAME VALUE C. DECREASE D. INCREASE AND DECREASE
49. WHICH CIRCUIT HAS THE MOST GAIN? A. COMMON EMITTER B. COMMON COLLECTOR C. COMMON BASE D. EMITTER FOLLOWER
50. WHICH RECTIFIER CIRCUIT USES FOUR DIODES FOR ITS RECTIFICATION? A. HALF-WAVE RECTIFIER B. FULL-WAVENCENTER TAP C. FULL-WAVE BRIDGE RECTIFIER D. SPLIT TYPE RECTIFIER
51. WHEN A RESISTOR IS OPEN, THE RESISTANCE _____. A. INCREASES B. GETS ZERO C. DECREASES D. IS INFINITE
A LOW VOLTAGE POWER SUPPLY CONVERTS _______. A. AC VOLTAGE OUTPUT B. PULSATING DC VOLTAGE C. DC OUTPUT VOLTAGE D. AC AND DC VOLTAGE OUTPUT
53. WHEN CHECKING AN OPEN RESISTOR USING AN OHMMETER THE RESISTANCE READS ______. A. ZERO LEVEL B. HIGH RESISTANCE BUT WITHIN THE TOLERANCE C. INFINITE D. LOW BUT NOT ZERO
54. MOVING ONE PLATE OF A CAPACITY FURTHER AWAY FROM THE OTHER WILL ______. A. DECREASE CAPACITANCE B. INCREASE CAPACITANCE C. DECREASE VOLTAGE RATING D. INCREASE MUTUAL TRANSDUCTUNCE
55. IN CHECKING CAPACITOR TO SEE IF IT IS SHORTED, OPEN OR LEAKY, YOU WOULD USE THE _____ OHMMETER RANGE. A. LOWEST B. HIGHEST C. MIDDLE D. YOU CANNOT CHECK THE CAPACITOR THIS WAY
56. A SCHEMATIC DIAGRAM SHOWS THE COMPONENTS OF AN ELECTRONIC CIRCUIT BY MEANS OF ______. A. A SYMBOL B. A CONSTRUCTION C. PHYSICAL APPEARANCE D. LINEAR APPEARANCE
57. IF THERE ARE ONLY TWO RESISTOR WITH THE SAME VALUES IN PARALLEL CIRCUIT, WHICH FORMULA MAY BE USED TO FIND ITS TOOL RESISTACE? A. Rt=R/n B. Rt=(R1xR2)(R1+R2) C. l/Rt=l/R1+1/R2+…l/Rn D. Rt=(R1+R2)/(R1xR2)
58. IMAGINE THREE RESISTOR IN PARALLEL, WITH THE VALUES OF 22OHMS, 17 OHMS AND 33 OHMS. IF A 12 BATTERY IS CONNECTED ACROSS THIS COMBINATION, WHAT IS THE CURRENT DRAWN FROM THE BATTERY? A. 1.4 A B. 15 mA C. 150mA D. 1.5 A
59. WHICH OF THE FOLLOWING IS NON-POLIRIZED ELECTRONIC COMPONENT? A. TRANSISTOR B. RESISTOR C. DIODE D. ELECTROLYTIC CAPACITOR
60. THE VOLTAGE RATING FOUND IN A CAPACITOR IS CALLED ______VOLTAGE. A. PEAK REVERSE B. WORKING C. BLOW-UP D. BREAKDOWN
61. A DIODE IS AN ELECTRONIC PART THAT IS EXPECTTED TO DO ONE OF THE FOLLOWING FUNCTIONS ALL TIMES. WHICH ONE? A. ALLOW CURRENT TO FLOW IN BOTH DIRECTIONS B. MULTIPLY VOLTAGE C. ALLOW CURRENT TO FLOW IN ENO DIRECTION ONLY D. DO NOT ALLOW CURRENT FLOW
62. THERE ARE FOUR TYPES OF DIODES. THE DIODE THAT ACTS AS A REGULAR IS THE ____ DIODE. A. SILICON B. CRYSTAL C. LIGHT EMITTING D. ZENER
63. YOU WILL AN ELECTRODE NEAREST THE WHITE BAND ON A RECTIFIER. WHAT IS IT? A. ANODE B. CATHODE C. GATE D. MAIN TERMINAL
64. WHEN A DIODE IS TESTED AND THE READING ID ZERO, IT MEANS THAT THE DIODE IS ______. A. SHORTED B. OPEN C. LEAK D. GOOD
65. IF THE TRANSISTOR IS AN NPN TYPE THE BASE IS _____. A. NEGATIVE AND POSITIVE B. NEGATIVE C. POSITIVE D. COMMON
66. TF THE ARROW OF THE IS POINTING INWARD IT TELLS US THAT THE TRANSISTOR IS ______. A. NPN B. PNP C. BIPOLAR D. INJUNCTION
67. IN THE ELECTRONIC SYMBOL OF A TRANSISTOR, THE ELECTRODE WITH AN ARROW IS THE_____. A. EMITTER B. BASE C. COLLECTOR D. CATHODE
68. THE MPRODUCTION OF MAGNETIC FIELD BY CURRENT IN A CONDUCTOR IS CALLED ______. A. ELECTROMAGNETISM B. FERROMAGNETISM C. MAGNETISM D. DIAMAGNETISM
69. THE TYPE OF CURRENT WHICH THE AMPLITUDE DROPS TO ZERO PERIODICALLY AND IS PRODUCED IN RECTIFIER IS KNOWN AS ______. A. PULSATING DIRECT CURRENT B. DAMPED ALTERNATING CURRENT C. VARYING DIRECT CURRENT D. SAW TOOTH WAVE
70. PRINTED ON THE DIAL OF AN RADIO IS AN RF BAND COVERING ______. A. kHz 76-90 Mhz B. 88-108 Mhz C. 16Hz-20 kHz D. 535-1605 kHz
71. AN ORDINARY RADIO CAN BE TURED IN DIFFERENT STATIONS. THE ELECTRONIC COMPONENT RESPONSIBLE FOR THIS FUNCTION IS THE _____. A. TUNING CAPACITOR B. OSCILLATOR C. IF TRANSFORMER D. DETECTOR DIODE
72. THE CONDITION OF A LOUD SPEAKER IS TESTED MORE ACCURATELY USING ONE OF THE RANGES LISTED BELOW. WHICH ONE? A. Rx1K B. Rx10 C. Rx1 D. Rx10K
73. WORKING EFFICIENTLY IS A GOOD WORK HABIT. TINNING TIP OF A SOLDERING IRON REFERS TO _____. A. CLEANING THE TIP WITH A SAND PAPER B. MAKING THE TIP POINTED C. CUTTING THE TIP D. APPLYING FLUX THE TIP
74. THE COMMON CAUSE OF ERRATIC OR DISTORTED SOUND OF A TRANSISTOR RADIO IS A DEFECTIVE ____. A. AMPLIFIER B. VOLUME CONTROL C. ANTENNA D. TANER
75. AN APPLIANCE WITH 110V AC SUPPLY IS ACCIDENTALLY PLUGGED TO 220v OUTLET. WHAT COMPONENT IS USUALLY DESTROYED? A. SWITCH B. AC PLUG C. LINE FUSE D. POWER TRANSFORMER
76. WHICH FORM OF ELECTRICITY HAS CURRENT FLOW ALWAYS IN THE SAME DIRECTION? A. VOLTAGE B. POWER C. ALTERNATING CURRENT D. DIRECT CURRENT
77. THE FORCE THAT OPPOSES AND REDUCES THE FLOW OF ELECTRICAL CURRENT IS RECOGNIZED AS ____. A. POWER B. RESISTANCE C. ELECTROMAGNETISM D. FREQUENCY
78. WHICH PART OF AN ELECTRICAL CIRCUIT CONVERTS ELECTRICAL ENERGY INTO ANOTHER FORM OG ENERGY TO DO WORK? A. LOAD B. CIRCUIT C. SOURCE D. CONTROL
79. A LAW THAT STATES THAT THE CURRENT IS DIRECTLY PROPORTIONAL TO VOLTAGE AND INVERSELY PROPORTIONAL TO RESISTANCE IS KNOWN AS ____. A. PEC B. LAW OF RESISTIVITY C. KIRCHOFF’S LAW D. OHM’S LAW
80. CIRCUIT BREAKER ARE USED TO PROTECT HOUSE HOLD ELECTRICAL CIRCUITS. WHAT IS THE CAPACITY RATING OF THE BREAKER USED FOR CONVENIENCE OUTLET OF GENERAL PURPOSE CIRCUITS? A. 20 AMPERES B. 30 AMPERES C. 15 AMPERES D. 60 AMPERES
81. WHICH HAND TOOL IS USED SOLELY FOR CUTTING METAS? A. UTILITY KNIFE B. SAW C. MAGNIFYING GLASS D. PAINT BRUSH
82. WHAT IS THE REASON WHY THEARDS BECOME STRIPPED? A. SCREWS ARE OVER TIGHTENED B. SCREWS ARE HEATED C. SCREWS ARE MOLDED D. SCREWS ARE PAINTED
83. IN WHAT INSTRUMENT IS THE OHM METER FOUND? A. AMMETER B. TUBE TESTER C. CAPACITOR TESTER D. VOM
84. FROM WHAT PART OF THE OHMMETER DO YOU DERIVE RESISTANCE READING? A. RANGE MULTIPLIER B. READING SCALE C. TEST PROBS D. POINTER
85. WHICH INSTRUMENT SERVES AS 3 MEASURING INSTRUMENTS IN ONE? A. AUDIO GENERATOR B. OSCILLOSCOPE C. SIGBNAL GENERATOR D. VOM
86. WHICH DEVICE PRODUCES SIMPLE WAVEFORMS? A. AUDIO AMPLIER B. VOM C. SIGNAL TRACER D. SIGNAL GENERATOR
87. WHAT IS ANOTHER NAME FOR CONNECTION DIAGRAM? A. WIRING DIAGRAM B. BLOCK DIAGRAM C. PICTORIAL DIAGRAM D. SCHEMATIC DIAGRAM
88. WHICH EQUIPMENT IS USED TO DISCHARGE ELECTRICAL CHARGES PRODUCED BY THE HUMAN BODY? A. Audio generator B. Signal generator C. ESD D. VOM
89. WHICH TERM REFERS TO THE SET OF RULES OR PRACTICES TO ENSURE NO ACCIDENT PREVENTION? A. SAFETY PRACTICES B. RULES AND REGULATIONS C. POLICY ORDER D. ACTION PLAN
90. WHAT IS THE BEST PLACE OF ELECTRONIC HAND TOOLS AND EQUIPMENT? A. TOOL BOX B. TOOL CABINET C. TOOL ROOM D. TOOL BAG
91. WHAT TOOLS ARE NOT RECOMMEDED TO BE USED IN ELECTRONICS WORKS? A. BRAND NEW TOOLS B. BRANDED TOOLS C. DAMAGED TOOLS D. LOCALLY PRODUCED TOOLS
92. WHICH TYPE OF LINES IS USED TO SHOW MECHANICAL LINKAGES BETWEEN COMPONENTS OR PARTS OF COMPONENTS ON SCHEMATIC DIAGRAM? A. CONNECTING LINES B. DASHED LINES C. MEDIUM LINES D. THIN LINES
93. WHAT DOES VOM MEAN? A. AC VOLTMETER B. OHMMETER C. DC MILLIAMMETER D. VOLT-OHM-MILLIAMMETER
94. WHICH TOOL IS USED TO CUT THE INSULATION WITHOUT CUTTING THE WIRE? A. UTILITY KNIFE B. HACKSAW C. SIDE CUTTER D. WIRE STRIPPER
95. What does LED stand for? A. Light emitting display B. Low energy display C. Light emitting diode D. Light emitting detector
96.Which picture or sketch shows the component of a circuit and how these component are connected together? A. Wiring diagram B. Block diagram C. Pictorial diagram D. Schematic diagram
97. 3 Pcs of resistor in which the values are 10 ohms, 20 ohms, and 50 ohms. If the 20 ohms is open what will be the reading in the ohmmeter? A. 60 ohms B. 0 ohms C. Infinite D. 80 ohms
98. Why does an AM receiver or pick-up signal despite the far distance from the transmitter compared to the FM receiver? A. The Am receiver picks up signal easily because of the transistor. B. The Am receiver picks up signal easily because the signals transmitted by Am transmitter is by means of line sight. C. The Am receiver picks up signal easily because the signals transmitted by Am transmitter is by means of line sight. D. The Am receiver picks up signal easily because the signals transmitted by Am transmitter is by means of line sight.
99. Why is it needed to place antenna in higher or an elevated area particularly in a mountainous place? I. All signals transmitted by the transmitter station is by means of line to group; the higher antenna the more signal can be received. II. The antenna is placed in higher or elevated area in order to capture the direction. III. Signals transmitted by the transmitter station is by means of line to sight; the higher antenna the more signal can be received. A. I only B. III only C. II only D. I, II and III
100. A Service Electronics technician cleaned the terminal of the component using sand paper or knife before it soldered to the PCB. What is the main purpose of that cleaning? A. To attract more changes B. To move the insulator so that soldering can be made easily C. To attract electron, protons and neutron D. To maximize the desired voltages
101. If the Service Electronics Technician applied the so-called pre-tinning, how should the process be? A. The Service Electronics technician applies a little amount of soldering lead and soldering flux to the tip during pre-heating of the soldering Iron. B. The Service Electronics technician cleans the soldering tip using files, sand paper or a cutter. C. The Service Electronics technician allows his soldering iron to heat at least 40 minutes before he uses it and solders with the terminal of the component. D. The Service Electronics technician checks the temperature of the tip before soldering is made.

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  • 1. 1.THE WORD ELECTRON WAS DERIVED FROM THE GREEK ELECTRON WHICH MEANS ______. A. TO RUB B. TO FLOW C. AMBER D. FRICTION
  • 2. 2. THE PEAK TO PEAK VOLTAGE IN A 117 VAC OUTLET IS _______. A. 620 V B. 165.5 V C. 331 V D. 220 V
  • 3. 3. WHICH IS A TYPE OF MODULATION WHERE THE AMPLITUDE OF THE CARRIERS IS CHANGED IN ACCORDANCE WITH DEMODULATING SIGNAL? A. FM B. PDM C. AM D. PCM
  • 4. 4. THE ACTUAL OF FLOW OF CURRENT IS FROM ______. A. NEGATIVE TO POSITIVE B. POSITIVE TO NEGATIVE C. POSITIVE TO POSITIVE D. NEGATIVE TO NEGATIVE
  • 5. 5. THE RATE OF DOING WORK IS CALLED _______. A. ENERGY B. POWER C. VOLTAGE D. RESISTANCE
  • 6. 6. MILIHENRY IS EQUAL TO _____. A. 10TH HENRY B. 100TH HENRY C. 1000TH HENRY D. 1000000TH HENRY
  • 7. 7. AN INDUCTOR OPPOSES ANY CHANGE IN ______. A. VOLTAGE B. CURRENT C. FREQUENCY D. MODULATION
  • 8. 8. A CIRCUIT HAVING TWO OR MORE CURRENT PATHS IS ____ CONNECTION. A. PARALLEL B. SERIES C. SERIES-PARALLEL D. CONNOT DE DETERMINED
  • 9. 9. WHICH IS AN ELECTRICAL UNIT OF MEASURING A POWER? A. OHMS B. AMPERE C. WATT D. VOLT
  • 10. 10. A CATEGORY OF A RESISTOR WHICH OBEY OHM'S LAW IS ______. A. LINEAR B. NON LINEAR C. POTENTIOMETER D. RESISTANCE
  • 11. 11. WHICH IS AN ELECTRONIC DEVICE THAT IS USED TO LIMIT OR OPPOSE THE FLOW OF CURRENT IN A CIRCUIT? A. CAPACITOR B. RESISTOR C. DIODE D. INDUCTOR
  • 12. 12. AN INSTRUMENTS THAT IS USED TO MEASURE THE AMOUNT OF RESISTANCE IN A CIRCUIT IS CALLED ______. A. DC VOLTMETER B. OHMETER C. AC VOLTMETER D. AMMETER
  • 13. 13. SOLDER IS A MIXTURE OF _____. A. TIN LEAD B. ZINC AND LEAD C. ZINC AMD TIN D. COPPER AND LEAD
  • 14. 14. THE COMMONLY USED SOLDERINB LEAD IS ______. A. 40-60 B. 60-40 C. 50-50 D. 50-40
  • 15. 15. A STANDARD 220VAC HAS A FREQUENCY OF______. A. 45HZ B. 30HZ C. 50HZ D. 60HZ
  • 16. 16. A LOW FREQUENCY SPEAKER IS SOMETIMES KNOWN AS ______. A. TWEETER B. SQUEAKER C. WOOFER D. HOWLER
  • 17. 17. THE THREE LEADS OF A COMMON TRANSISTOR ARE A/AN ______. A. COLLECTOR BIAS EMITTER B. EMITTER COLLECTOR BAIS C. BASE COLLECTOR CASE D. COLLECTOR BASE EMITTER
  • 18. 18. CONNECTING LEAD FROM THE NEGATIVE TO THE POSITIVE OF A BATTERY WILL PRODUCE A/AN ______. A. HIGH RESISTANCE CIRCUIT B. LOW CURRENT PATH C. SHORT CIRCUIT D. OPEN CIRCUIT
  • 19. 19. WHAT IS THE APPROXIMATE CHARACTERISTIC VOLTAGE THAT DEVELOPS ACROSS A RED LED? A. 1.7 V B. 0.6 V C. 3.4 V D. 6 V
  • 20. 20. IF TWO RESISTOR ARE PLACED IN SERIES, THE FINAL RESISTANCE IS _____. A. HIGHER B. LOWER C. THE SAME D. CANNOT BE DETERMINED
  • 21. 21. A 100N CAPACITOR IN PARALLEL WITH 10N PRODUCE _____. A. 90N B. 110N C. 100N D. CANNOT BE DETERMINED
  • 22. 22. THE RESISTOR IN PARALLEL WITH 10K PRODUCES _____. A. 10K B. 20K C. 5K D. CANNOT BE DETERMINED
  • 23. 23. THE 2 PCS OF 3V BATTERIES ARE CONNECTED IN SERIES. THE OUTPUT VOLTAGE IS ______. A. 3V B. 6V C. OV D. CANNOT BE DETERMINED
  • 24. 24. AN ELECTRIC DEVICE THAT IS USED TO LIMIT OR OPPOSE THE FLOW OF CURRENT IN A CIRCUIT IS CALLED ____. A. CAPACITOR B. RESISTOR C. DIODE D. INDUCTOR
  • 25. 25. WHICH TOOL IS NEEDED IN REMOVING SOLDERING ELECTRONIC COMPONENTS IN THE CIRCUIT BOARD? A. LONG NOSE PLIERS B. DESOLDERING PUMP C. DIAGONAL CUTTING PLIERS D. WIRE STRIPPER
  • 26. 26. WHICH TOOL IS USED IN JOINING OR SOLDERING ELECTRONIC COMPONENTS IN THE CIRCUIT BOARD? A. SOLDERING IRON B. ELECTRICAL PLIERS C. DESOLDERING PUMP D. LONG NOSE PLIERS
  • 27. 27. WHICH TOOL IS USED TO HOLD OR PICK UP COMPONENTS IN THE CIRCUIT BOARD? A. MECHANICAL PLIERS B. LONG NOSE PLIERS C. ELECTRICAL PLIERS D. WIRE STRIPPER
  • 28. 28. WHICH TOOL USED IN TURNING SHORTTED SCREWS? A. FLAT SCREW DRIVER B. PHILLIPS SCREW DRIVER C. ELECTRICAL PLIERS D. WIRE STRIPPER
  • 29. 29. which is a convenient pocket-sized tool that provides maximum safety when pulling cartridge fuses and electrical connections? A. fuse puller B. screw driver C. desoldering tool D. mini drill
  • 30. 30. THE RESISTOR IDENTIFIED AS R1 IS CALLED______. A.base bias resistor B.emitter feedback resistor C.load resistor D.bypass resistor
  • 31. 31. THE LEAD MARKED WITH THE ARROW IS THE ______. A. COLLECTOR B. EMITTER C. BASE D. FORWARD
  • 32. 32. THE CLOSET VALUE FOR THIS COMBINATION IS _____. A. 33 OHMS B. 40 OHMS C. 35 OHMS D. 10 OHMS
  • 33. 33. THIS STAGE IS CALLED _____. A.common base B.common emitter C.common collector D.emitter follower
  • 34. 34. THE FOUR SYMBOLS GIVEN BELOW ARE ______. A. CAPACITOR, SPEAKER, POTENTIOMETER, ELECTROLYTIC B. ELECTROLYTIC, SPEAKER, RESISTOR, CAPACITOR C. CAPACITOR, PIEZO, RESISTOR, ELECTROLYTIC D. ELECTROLYTIC, COIL, RESISTOR, CAPACITOR
  • 35. 35. THE RESISTOR IDENTIFIED AS R2 IS CALLED _____. A. BASE BIAS RESISTOR B. LOAD RESISTOR C. EMITTER FEDDBACK RESISTOR D. BYPASS RESISTOR
  • 36. 36. NANE THE FOUR COMPONENTS. A. TRIAC, DIAC, LED, ZENER DIODE B. ZENER DIODE, LED, TRIAC, SCR C. ZENER DIODE, LED, SCR, TRIAC D. ZENER DIODE, TRIAC, SCR, LED
  • 37. 37. A CAPACITOR AND COIL IN PARALLEL IS CALLED A ____CIRCUIT. A. TUNED B. TIMING C. SCHMITT D. DECAY
  • 38. 38. WHAT IS THIS SYMBOL? A. OP AMP B. INVERTER C. SHMITT D. BUFFER
  • 39. 39. IF A 10K RESISTOR IS PLACED ACROSS A 10 V SUPPLY, THE CURRENT WILL BE ______. A. 10 mA B. 0.001 mA C. 1 mA D. 65 mA
  • 40. 40. A DISADVANTAGE OF LCD (LIQUID CRYSTAL DISPLAY) IS ____. A. HIGH CURRENT DEMANDS B. SLOW REACTANCE TO INPUT C. ENVIRONMENTAL TEMPERATURE SENSITIVITY D. PERSISTENCE LIMITATIONS
  • 41. 41. WHICH IS TRUE OF A SERIES DC MOTOR WITH NO LOAD? A. TENDSTO STOP OR NOT START B. MAYBE DAMAGED BY EXCESSIVE SPEED C. HAS REVERSE DIRECTION D. BECIMOS AN AC GENERATOR
  • 42. 42. A FUSE MARKED 250V, 650M CAN BE USED IN CIRCUITS WITH AN “OPEN- FUSE” SSUPPLY VOLTAGE OF _____. A. 125 VOLTS B. 500 VOLTS C. 5000 VOLTS D. 250 VOLTS
  • 43. 43. TO PREVENT TRANSISTOR FROM GETTING HOT, USE _____. A. SILICON GREASE B. INSULATOR C. HEAT SINK D. EXHAUST FAN
  • 44. 44. TO OBTAIN A HIGHER VALUE OF RESISTANCE, RESISTOR ARE _____. A. REVERSE B. PARALLEL C. FORWARD D. SERIES
  • 45. 45. WHICH FUSE HAS ITS INTERNAL FUSIBLE WIRE WRAPPED AROUND AN INSULATOR? A. A LOW-BLOW TYPE FUSE B. AN INDUCTIVE FUSE C. A CAPACITIVE FUSE D. INTENDED FOR HIGH VOLTAGE FUSE
  • 46. 46. WHICH WOULD BE CONSIDERD “BASIC COMPONENTS OF A POWER SUPPLY? A. ZENER, REGULATOR, TRANSFORMER B. REGULATOR, DIODE, AC POWER, LOAD C. TRANSFORMER, BRIDGE, CAPACITOR, LOAD D. FILTER, REGULATOR, RECTIFIER, TRANSFORMER
  • 47. 47. WHICH PRESENTS THE RISE AND FALL OF ALTERNATING CURRENT AND VOLTAGES? A. GRAPH B. SINE WAVE C. FLUCTUATION D. CYCLE
  • 48. 48. WHEN TWO CAPACITOR ARE CONNECTED IN PARALLEL THE CAPACITANCE WILL A. INCREASE B. HAVE THE SAME VALUE C. DECREASE D. INCREASE AND DECREASE
  • 49. 49. WHICH CIRCUIT HAS THE MOST GAIN? A. COMMON EMITTER B. COMMON COLLECTOR C. COMMON BASE D. EMITTER FOLLOWER
  • 50. 50. WHICH RECTIFIER CIRCUIT USES FOUR DIODES FOR ITS RECTIFICATION? A. HALF-WAVE RECTIFIER B. FULL-WAVENCENTER TAP C. FULL-WAVE BRIDGE RECTIFIER D. SPLIT TYPE RECTIFIER
  • 51. 51. WHEN A RESISTOR IS OPEN, THE RESISTANCE _____. A. INCREASES B. GETS ZERO C. DECREASES D. IS INFINITE
  • 52. A LOW VOLTAGE POWER SUPPLY CONVERTS _______. A. AC VOLTAGE OUTPUT B. PULSATING DC VOLTAGE C. DC OUTPUT VOLTAGE D. AC AND DC VOLTAGE OUTPUT
  • 53. 53. WHEN CHECKING AN OPEN RESISTOR USING AN OHMMETER THE RESISTANCE READS ______. A. ZERO LEVEL B. HIGH RESISTANCE BUT WITHIN THE TOLERANCE C. INFINITE D. LOW BUT NOT ZERO
  • 54. 54. MOVING ONE PLATE OF A CAPACITY FURTHER AWAY FROM THE OTHER WILL ______. A. DECREASE CAPACITANCE B. INCREASE CAPACITANCE C. DECREASE VOLTAGE RATING D. INCREASE MUTUAL TRANSDUCTUNCE
  • 55. 55. IN CHECKING CAPACITOR TO SEE IF IT IS SHORTED, OPEN OR LEAKY, YOU WOULD USE THE _____ OHMMETER RANGE. A. LOWEST B. HIGHEST C. MIDDLE D. YOU CANNOT CHECK THE CAPACITOR THIS WAY
  • 56. 56. A SCHEMATIC DIAGRAM SHOWS THE COMPONENTS OF AN ELECTRONIC CIRCUIT BY MEANS OF ______. A. A SYMBOL B. A CONSTRUCTION C. PHYSICAL APPEARANCE D. LINEAR APPEARANCE
  • 57. 57. IF THERE ARE ONLY TWO RESISTOR WITH THE SAME VALUES IN PARALLEL CIRCUIT, WHICH FORMULA MAY BE USED TO FIND ITS TOOL RESISTACE? A. Rt=R/n B. Rt=(R1xR2)(R1+R2) C. l/Rt=l/R1+1/R2+…l/Rn D. Rt=(R1+R2)/(R1xR2)
  • 58. 58. IMAGINE THREE RESISTOR IN PARALLEL, WITH THE VALUES OF 22OHMS, 17 OHMS AND 33 OHMS. IF A 12 BATTERY IS CONNECTED ACROSS THIS COMBINATION, WHAT IS THE CURRENT DRAWN FROM THE BATTERY? A. 1.4 A B. 15 mA C. 150mA D. 1.5 A
  • 59. 59. WHICH OF THE FOLLOWING IS NON-POLIRIZED ELECTRONIC COMPONENT? A. TRANSISTOR B. RESISTOR C. DIODE D. ELECTROLYTIC CAPACITOR
  • 60. 60. THE VOLTAGE RATING FOUND IN A CAPACITOR IS CALLED ______VOLTAGE. A. PEAK REVERSE B. WORKING C. BLOW-UP D. BREAKDOWN
  • 61. 61. A DIODE IS AN ELECTRONIC PART THAT IS EXPECTTED TO DO ONE OF THE FOLLOWING FUNCTIONS ALL TIMES. WHICH ONE? A. ALLOW CURRENT TO FLOW IN BOTH DIRECTIONS B. MULTIPLY VOLTAGE C. ALLOW CURRENT TO FLOW IN ENO DIRECTION ONLY D. DO NOT ALLOW CURRENT FLOW
  • 62. 62. THERE ARE FOUR TYPES OF DIODES. THE DIODE THAT ACTS AS A REGULAR IS THE ____ DIODE. A. SILICON B. CRYSTAL C. LIGHT EMITTING D. ZENER
  • 63. 63. YOU WILL AN ELECTRODE NEAREST THE WHITE BAND ON A RECTIFIER. WHAT IS IT? A. ANODE B. CATHODE C. GATE D. MAIN TERMINAL
  • 64. 64. WHEN A DIODE IS TESTED AND THE READING ID ZERO, IT MEANS THAT THE DIODE IS ______. A. SHORTED B. OPEN C. LEAK D. GOOD
  • 65. 65. IF THE TRANSISTOR IS AN NPN TYPE THE BASE IS _____. A. NEGATIVE AND POSITIVE B. NEGATIVE C. POSITIVE D. COMMON
  • 66. 66. TF THE ARROW OF THE IS POINTING INWARD IT TELLS US THAT THE TRANSISTOR IS ______. A. NPN B. PNP C. BIPOLAR D. INJUNCTION
  • 67. 67. IN THE ELECTRONIC SYMBOL OF A TRANSISTOR, THE ELECTRODE WITH AN ARROW IS THE_____. A. EMITTER B. BASE C. COLLECTOR D. CATHODE
  • 68. 68. THE MPRODUCTION OF MAGNETIC FIELD BY CURRENT IN A CONDUCTOR IS CALLED ______. A. ELECTROMAGNETISM B. FERROMAGNETISM C. MAGNETISM D. DIAMAGNETISM
  • 69. 69. THE TYPE OF CURRENT WHICH THE AMPLITUDE DROPS TO ZERO PERIODICALLY AND IS PRODUCED IN RECTIFIER IS KNOWN AS ______. A. PULSATING DIRECT CURRENT B. DAMPED ALTERNATING CURRENT C. VARYING DIRECT CURRENT D. SAW TOOTH WAVE
  • 70. 70. PRINTED ON THE DIAL OF AN RADIO IS AN RF BAND COVERING ______. A. kHz 76-90 Mhz B. 88-108 Mhz C. 16Hz-20 kHz D. 535-1605 kHz
  • 71. 71. AN ORDINARY RADIO CAN BE TURED IN DIFFERENT STATIONS. THE ELECTRONIC COMPONENT RESPONSIBLE FOR THIS FUNCTION IS THE _____. A. TUNING CAPACITOR B. OSCILLATOR C. IF TRANSFORMER D. DETECTOR DIODE
  • 72. 72. THE CONDITION OF A LOUD SPEAKER IS TESTED MORE ACCURATELY USING ONE OF THE RANGES LISTED BELOW. WHICH ONE? A. Rx1K B. Rx10 C. Rx1 D. Rx10K
  • 73. 73. WORKING EFFICIENTLY IS A GOOD WORK HABIT. TINNING TIP OF A SOLDERING IRON REFERS TO _____. A. CLEANING THE TIP WITH A SAND PAPER B. MAKING THE TIP POINTED C. CUTTING THE TIP D. APPLYING FLUX THE TIP
  • 74. 74. THE COMMON CAUSE OF ERRATIC OR DISTORTED SOUND OF A TRANSISTOR RADIO IS A DEFECTIVE ____. A. AMPLIFIER B. VOLUME CONTROL C. ANTENNA D. TANER
  • 75. 75. AN APPLIANCE WITH 110V AC SUPPLY IS ACCIDENTALLY PLUGGED TO 220v OUTLET. WHAT COMPONENT IS USUALLY DESTROYED? A. SWITCH B. AC PLUG C. LINE FUSE D. POWER TRANSFORMER
  • 76. 76. WHICH FORM OF ELECTRICITY HAS CURRENT FLOW ALWAYS IN THE SAME DIRECTION? A. VOLTAGE B. POWER C. ALTERNATING CURRENT D. DIRECT CURRENT
  • 77. 77. THE FORCE THAT OPPOSES AND REDUCES THE FLOW OF ELECTRICAL CURRENT IS RECOGNIZED AS ____. A. POWER B. RESISTANCE C. ELECTROMAGNETISM D. FREQUENCY
  • 78. 78. WHICH PART OF AN ELECTRICAL CIRCUIT CONVERTS ELECTRICAL ENERGY INTO ANOTHER FORM OG ENERGY TO DO WORK? A. LOAD B. CIRCUIT C. SOURCE D. CONTROL
  • 79. 79. A LAW THAT STATES THAT THE CURRENT IS DIRECTLY PROPORTIONAL TO VOLTAGE AND INVERSELY PROPORTIONAL TO RESISTANCE IS KNOWN AS ____. A. PEC B. LAW OF RESISTIVITY C. KIRCHOFF’S LAW D. OHM’S LAW
  • 80. 80. CIRCUIT BREAKER ARE USED TO PROTECT HOUSE HOLD ELECTRICAL CIRCUITS. WHAT IS THE CAPACITY RATING OF THE BREAKER USED FOR CONVENIENCE OUTLET OF GENERAL PURPOSE CIRCUITS? A. 20 AMPERES B. 30 AMPERES C. 15 AMPERES D. 60 AMPERES
  • 81. 81. WHICH HAND TOOL IS USED SOLELY FOR CUTTING METAS? A. UTILITY KNIFE B. SAW C. MAGNIFYING GLASS D. PAINT BRUSH
  • 82. 82. WHAT IS THE REASON WHY THEARDS BECOME STRIPPED? A. SCREWS ARE OVER TIGHTENED B. SCREWS ARE HEATED C. SCREWS ARE MOLDED D. SCREWS ARE PAINTED
  • 83. 83. IN WHAT INSTRUMENT IS THE OHM METER FOUND? A. AMMETER B. TUBE TESTER C. CAPACITOR TESTER D. VOM
  • 84. 84. FROM WHAT PART OF THE OHMMETER DO YOU DERIVE RESISTANCE READING? A. RANGE MULTIPLIER B. READING SCALE C. TEST PROBS D. POINTER
  • 85. 85. WHICH INSTRUMENT SERVES AS 3 MEASURING INSTRUMENTS IN ONE? A. AUDIO GENERATOR B. OSCILLOSCOPE C. SIGBNAL GENERATOR D. VOM
  • 86. 86. WHICH DEVICE PRODUCES SIMPLE WAVEFORMS? A. AUDIO AMPLIER B. VOM C. SIGNAL TRACER D. SIGNAL GENERATOR
  • 87. 87. WHAT IS ANOTHER NAME FOR CONNECTION DIAGRAM? A. WIRING DIAGRAM B. BLOCK DIAGRAM C. PICTORIAL DIAGRAM D. SCHEMATIC DIAGRAM
  • 88. 88. WHICH EQUIPMENT IS USED TO DISCHARGE ELECTRICAL CHARGES PRODUCED BY THE HUMAN BODY? A. Audio generator B. Signal generator C. ESD D. VOM
  • 89. 89. WHICH TERM REFERS TO THE SET OF RULES OR PRACTICES TO ENSURE NO ACCIDENT PREVENTION? A. SAFETY PRACTICES B. RULES AND REGULATIONS C. POLICY ORDER D. ACTION PLAN
  • 90. 90. WHAT IS THE BEST PLACE OF ELECTRONIC HAND TOOLS AND EQUIPMENT? A. TOOL BOX B. TOOL CABINET C. TOOL ROOM D. TOOL BAG
  • 91. 91. WHAT TOOLS ARE NOT RECOMMEDED TO BE USED IN ELECTRONICS WORKS? A. BRAND NEW TOOLS B. BRANDED TOOLS C. DAMAGED TOOLS D. LOCALLY PRODUCED TOOLS
  • 92. 92. WHICH TYPE OF LINES IS USED TO SHOW MECHANICAL LINKAGES BETWEEN COMPONENTS OR PARTS OF COMPONENTS ON SCHEMATIC DIAGRAM? A. CONNECTING LINES B. DASHED LINES C. MEDIUM LINES D. THIN LINES
  • 93. 93. WHAT DOES VOM MEAN? A. AC VOLTMETER B. OHMMETER C. DC MILLIAMMETER D. VOLT-OHM-MILLIAMMETER
  • 94. 94. WHICH TOOL IS USED TO CUT THE INSULATION WITHOUT CUTTING THE WIRE? A. UTILITY KNIFE B. HACKSAW C. SIDE CUTTER D. WIRE STRIPPER
  • 95. 95. What does LED stand for? A. Light emitting display B. Low energy display C. Light emitting diode D. Light emitting detector
  • 96. 96.Which picture or sketch shows the component of a circuit and how these component are connected together? A. Wiring diagram B. Block diagram C. Pictorial diagram D. Schematic diagram
  • 97. 97. 3 Pcs of resistor in which the values are 10 ohms, 20 ohms, and 50 ohms. If the 20 ohms is open what will be the reading in the ohmmeter? A. 60 ohms B. 0 ohms C. Infinite D. 80 ohms
  • 98. 98. Why does an AM receiver or pick-up signal despite the far distance from the transmitter compared to the FM receiver? A. The Am receiver picks up signal easily because of the transistor. B. The Am receiver picks up signal easily because the signals transmitted by Am transmitter is by means of line sight. C. The Am receiver picks up signal easily because the signals transmitted by Am transmitter is by means of line sight. D. The Am receiver picks up signal easily because the signals transmitted by Am transmitter is by means of line sight.
  • 99. 99. Why is it needed to place antenna in higher or an elevated area particularly in a mountainous place? I. All signals transmitted by the transmitter station is by means of line to group; the higher antenna the more signal can be received. II. The antenna is placed in higher or elevated area in order to capture the direction. III. Signals transmitted by the transmitter station is by means of line to sight; the higher antenna the more signal can be received. A. I only B. III only C. II only D. I, II and III
  • 100. 100. A Service Electronics technician cleaned the terminal of the component using sand paper or knife before it soldered to the PCB. What is the main purpose of that cleaning? A. To attract more changes B. To move the insulator so that soldering can be made easily C. To attract electron, protons and neutron D. To maximize the desired voltages
  • 101. 101. If the Service Electronics Technician applied the so-called pre-tinning, how should the process be? A. The Service Electronics technician applies a little amount of soldering lead and soldering flux to the tip during pre-heating of the soldering Iron. B. The Service Electronics technician cleans the soldering tip using files, sand paper or a cutter. C. The Service Electronics technician allows his soldering iron to heat at least 40 minutes before he uses it and solders with the terminal of the component. D. The Service Electronics technician checks the temperature of the tip before soldering is made.