MCQs BSNL JE

1. Stability of a control system can be determined from one of the following responses :
(a) ramp response                                                   
(b) step response
(c) impulse response                                               
(d) None of these                           
Ans (c)
2. Consider noisy binary channel with bit error probability Pe = 5 x 10-5. Assume 10000 bits are being transmitted over such a channel. The probability that there will be 2 or less number of bits in error is :
(a) 10-4                                            
(b) ~0.5
(c) ~1                                          
(d) 104                                                   
Ans (a)
3. The measured value of a capacitor is 100μF. The true value of the capacitor is 110μF. The percentage relative error is :
(a) 9.99 %                                                           
(b) 9.09 %
(c) 10.0 %                                                                 
(d) 4.76 %                                           
Ans (b)
4. Which one of the following correctly defines a C-macro for computing the square ?
(a) #define sqr(x) x * x
(b) #define sqr(x) (x * x)
(c) #define sqr(x) ((x) * (x))
(d) #define sqr(x) (x) * (x)                            
Ans (b)
5. Harassment is just a plain _________. There is never a valid reason or a good ______ for it.
(a) wrong, excuse                                                  
(b) murder, command
(c) falsehood, remedy                                    
(d) killing, magic                               
Ans (a)
6. In a certain language BOMBAY is written as YABOMB. How would LUCKNOW be written in that language ?
(a) WONKCUL                                        
(b) LUCKNOW
(c) WONLUCK                                       
(d) LUCKWONK                                
Ans (a)
7. What is the current (I) in a typical regulator configuration :
(a) 100 mA                                
(b) 50 mA           
(c) 200 mA                                         
(d) None of these                                           
Ans (b)
8.  Measurement of flow, thermal conductivity an liquid level using thermistors make use of :
(a) resistance decrease with temperature
(b) resistance increase with temperature
(c) self-heating phenomenon
(d) change of resistivity                                 
Ans (b)
9.  A 0 to 6 counter consists of 3 flip flops and a combination circuit of 2 input gate(s). The combination circuit consists of :
(a) one AND gate                                 
(b) one OR gate
(c) one AND gate and one OR gate                                          
(d) two AND gates                                          
Ans (a)
10. The difference between the indicated value and the true value of quantity is :
(a) Gross error                                          
(b) Absolute error
(c) Dynamic error                                           
(d) Relative error                                            
Ans (b)
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