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 - 3

  • Online Practice Test - ECE
   

1.
  The Fourier series expansion of an even periodic function contains .
  • A.   Cosine terms and a constant
  •  
  • B.   Sine terms only
  •  
  • C.   Sine terms and constant
  •  
  • D.   Cosine terms only
  Options: A    B    C    D   
   
 
   

2.
  Principle of superposition is applicable to :.
  • A.   linear system only
  •  
  • B.   non- linear system only
  •  
  • C.   both linear and non-linear systems
  •  
  • D.   linear systems and some non –linear systems
  Options: A    B    C    D   
   
   

3.
  The impulse response of matched filter is :.
  • A.   s(t –T)
  •  
  • B.   s(t +T)
  •  
  • C.   s(T – t)
  •  
  • D.   s( T)
  Options: A    B    C    D   
   
 
   

4.
  The characteristic impedance of free space is :.
  • A.   120 ohms
  •  
  • B.   120 k ohms
  •  
  • C.   377 k ohms
  •  
  • D.   377 ohms
  Options: A    B    C    D   
   
   

5.
  If a network contains B branches and N nodes , then the number of mesh current equations would be :.
  • A.   B – (N – 1)
  •  
  • B.   N – (B – 1 )
  •  
  • C.   B – N – 1
  •  
  • D.   (B + N) – 1
  Options: A    B    C    D   
   
 
   

6.
  If the correlation coefficient is zero , the two regression lines are :.
  • A.   Parallel
  •  
  • B.   Perpendicular
  •  
  • C.   Coincident
  •  
  • D.   Inclined at 45? to each other
  Options: A    B    C    D   
   
   

7.
  If the phase margin is negative , it indicates that the system is :.
  • A.   highly stable
  •  
  • B.   unstable
  •  
  • C.   oscillatory
  •  
  • D.   it has nothing to do with stability
  Options: A    B    C    D   
   
 
   

8.
  A Darlington transistor has :.
  • A.   Very low input impedance
  •  
  • B.   Three transistors
  •  
  • C.   Very high current gain
  •  
  • D.   One VBE drop
  Options: A    B    C    D   
   
   

9.
  The boolean function y = AB + CD is to be realized using only 2-input NAND gates. The minimum number of gates required is :.
  • A.   2
  •  
  • B.   3
  •  
  • C.   4
  •  
  • D.   5
  Options: A    B    C    D   
   
 
   

10.
  If a network has 68 nodes and 200 branches, the number of independent loop currents are .
  • A.   68
  •  
  • B.   200
  •  
  • C.   132
  •  
  • D.   133
  Options: A    B    C    D   
   

Complete Test
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