TRB exam online practice test for Electronics and Communication Engineering dept provides you with ample practice material for TRB exam preparation for cse department which adheres to the real exam format. Each TRB - ECE exam practice test has 10 questions. After completing click on to the COMPLETE TEST to know the score and the correct answers.


Electronics and Communication Engineering - TRB Online Practice Test - 1

  • Online Practice Test - ECE
   

1.
  The reciprocity theorem is applicable to :.
  • A.   Linear networks only
  •  
  • B.   Linear and bilateral networks
  •  
  • C.   Bilateral networks only
  •  
  • D.   Neither of the two
  Options: A    B    C    D   
   
 
   

2.
  A pn junction diode cannot be used .
  • A.   for adding a dc level
  •  
  • B.   for converting light energy into electrical energy
  •  
  • C.   for increasing amplitude of the ac signal
  •  
  • D.   for converting electrical energy into electromagnetic radiation .
  Options: A    B    C    D   
   
   

3.
  Red and Green LED is fabricate using :.
  • A.   Ga As
  •  
  • B.   Si
  •  
  • C.   Ga As P
  •  
  • D.   Ga P
  Options: A    B    C    D   
   
 
   

4.
  When is the Bode gain equal to the dc gain (zero frequency magnitude) of a transfer function?.
  • A.   with no poles at the origin
  •  
  • B.   with no zeros at the origin
  •  
  • C.   with no poles at infinity
  •  
  • D.   with no poles or zeros at origin
  Options: A    B    C    D   
   
   

5.
  In a broadcast super heterodyne receiver having no RF amplifier, the loaded Q of the antenna coupling circuit (at the input of the mixer) is 100. If the intermediate frequency is 455 kHz, calculate the image frequency at 25 MHz..
  • A.   25.91 MHz
  •  
  • B.   935 MHz
  •  
  • C.   93.5 MHz
  •  
  • D.   25.91 kHz
  Options: A    B    C    D   
   
 
   

6.
  The quantizing error of PCM system can be made less significant, for week signal by .
  • A.   companding
  •  
  • B.   using time-division multiplexing
  •  
  • C.   using frequency division multiplexing
  •  
  • D.   none of the above.
  Options: A    B    C    D   
   
   

7.
  In a non-time varying magnetic field , the value of V.J is:.
  • A.   I
  •  
  • B.   O
  •  
  • C.   H
  •  
  • D.   I2R
  Options: A    B    C    D   
   
 
   

8.
  The centre of the Smith chart represents:.
  • A.   short circuit condition
  •  
  • B.   open circuit condition
  •  
  • C.   matched condition
  •  
  • D.   mismatched condition
  Options: A    B    C    D   
   
   

9.
  The dominate mode of circular dielectric waveguide is: .
  • A.   HE10
  •  
  • B.   HE01
  •  
  • C.   HE11
  •  
  • D.   HE21
  Options: A    B    C    D   
   
 
   

10.
  Low power consumption achieved by CMOS circuits is due to which construction characteristics?.
  • A.   Small scale integration
  •  
  • B.   Complementary pair
  •  
  • C.   DIP package
  •  
  • D.   Connecting pads
  Options: A    B    C    D   
   

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