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Text File  |  1990-05-26  |  5KB  |  156 lines
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  12.  
  13.  
  14. NAME:_______________________________________________________
  15.  
  16.                   ELECTRONICS EXAM #1 
  17.  
  18.  
  19.  
  20. (1) IDENTIFY THE FOLLOWING RESISTOR VALUES BY ENTERING THE COLORS
  21. NEXT TO THE VALUE:
  22.  
  23.    A. 120k                                                 
  24.    B. 1.9K                                                 
  25.    C. 2.2K                                                 
  26.    D. 1.8M                                                 
  27.    E. 3.4M                                                 
  28.    F. 10                                                   
  29.    G. 220K                                                 
  30.    H. 10K                                                  
  31.  
  32. (2) IDENTIFY THE FOLLOWING RESISTOR VALUES BY THE COLORS GIVEN.
  33.  
  34.    A. RED-BLUE-ORANGE                             
  35.    B. BROWN-BLACK-RED                             
  36.    C. BROWN-GREEN-GREEN                           
  37.    D. ORANGE-WHITE-BLUE                           
  38.    E. YELLOW-YELLOW-YELLOW                        
  39.    F. BLUE-GREEN-ORANGE                           
  40.    G. RED-RED-BLUE                                
  41.    H. BLACK-BROWN-BLACK                           
  42.  
  43. (3) DESCRIBE HOW A RESISTOR MAY BE USED TO SHUNT A CURRENT METER.
  44.  
  45.  
  46. (4) DRAW A COMPLETE FULL-WAVE BRIDGE RECTIFIER POWER SUPPLY
  47. INCLUDING A TRANSFORMER, ELECTROLETEC CAPACITOR, LOAD RESISTOR AND
  48. LIGHT EMITTING DIODE. THE SUPPLY MUST PRODUCE 6 VOLTS DC AND WELL
  49. FILTERED.
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  64.  
  65.  
  66. (5) DESCRIBE THE ENTIRE ELECTRON SCANNING SYSTEM FOR A COLOR
  67. TELEVISION PICTURE TUBE; HOW THE ELECTRONS ARE EMITTED, CONTROLLED,
  68. PHOSPHOR MATRIX, SCAN LINES AND TIMES AS THOROUGHLY AS POSSIBLE.
  69.  
  70.                                                                
  71.                                                                
  72.                                                                
  73.                                                                
  74.                                                                
  75.                                                                
  76.                                                                
  77.                                                                
  78.                                                                
  79.                                                                
  80.                                                                
  81.  
  82. (6) DESCRIBE HOW ELECTRICITY FLOWS IN A CIRCUIT.
  83.  
  84.                                                                
  85.                                                                
  86.                                                                
  87.                                                                
  88.                                                                
  89.  
  90. (7) DEFINE RESONANCE.
  91.  
  92.                                                                
  93.                                                                
  94.                                                                
  95.  
  96. (8) DEFINE A LINEAR REACTION.
  97.  
  98.                                                                
  99.                                                                
  100.                                                                
  101.  
  102. (9) DEFINE AMPLIFICATION.
  103.  
  104.                                                                
  105.                                                                
  106.                                                                
  107.  
  108. (10) A SILICON CONTROLLED RECTIFIER (SCR) CAN BE COMPARED TO WHICH
  109. OF THE FOLLOWING:
  110.    A. POTENTIOMETER                F. A,C & D
  111.    B. RELAY                        G. A,B & C
  112.    C. SWITCH                       H. B & C
  113.    D. TRANSISTOR                   I. D & B
  114.    E. LED                          J. ALL OF THE ABOVE
  115.  
  116.  
  117.  
  118. (11) SILICON IS A [ ] GOOD  [ ] POOR CONDUCTOR OF ELECTRICITY.
  119.  
  120. (12) FARAD REFERS TO THE VALUE OF A ________________________ .
  121.  
  122. (13) OHM REFERS TO THE VALUE OF A __________________________ .
  123.  
  124. (14) IF I=20 AND E=12, WHAT IS R? __________________________ .
  125.  
  126. (15) IF R=300 AND I=8, WHAT IS E? __________________________ .
  127.  
  128. (16) IF E=12 AND R=200, WHAT IS I? _________________________ .
  129.  
  130. (17) ELECTRONS MUST FLOW IN A ______________  BEFORE THEY CAN DO
  131. ANY WORK.
  132.  
  133. (18) DEFINE "RIPPLE" AND HOW TO ELIMINATE IT.
  134.  
  135.                                                              
  136.                                                              
  137.                                                              
  138.  
  139. (19) ANYTIME THAT ELECTRICAL CURRENT IS USED TO DO WORK THERE IS
  140. ALWAYS SOME _____________ GENERATED AND IT IS REFERRED TO AS
  141. ___________ .
  142.  
  143. (20) A DIODE IS USED PRIMARILY TO CONVERT ______ TO _______
  144. VOLTAGE.
  145.  
  146. (21) A DIODE HAS TWO PARTS THAT ARE CALLED THE ____________
  147. AND ______________ .
  148.  
  149. (22) WHICH END OF A DIODE HAS A POSITIVE POLARITY? __________.
  150.  
  151. (23) CAPACITORS STORE ______ CURRENT BUT WILL PASS ________
  152. CURRENT. DESCRIBE THIS PROCESS.
  153.  
  154. (25) A MICRO-MICRO-FARAD IS OFTEN CALLED A __________________ .
  155.    
  156.