One Stop GATE Forum: E&E GATE Sample paper

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1
          A dc potentiometer is designed to measure up to
            about 2 V with a slide wire of 800 mm. A standard cell of emf 1.18 V
            obtains balance at 600 mm. A test cell is seen to obtain balance at
            680 mm. The emf of the test cell is
        
        
          Options
          
            
                
              
                  A) 1.00V 
                  B) 1.34V

                  
                
                
                  C) 1.50V 
                  D) 1.70V

                  
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          B
        
        
          

        
        
          2
          High Voltage DC (HVDC) transmission is mainly
            used for

          
        
        
          Options
          
            
                
              
                  A) bulk power transmission over very long distances

                  
                  B) inter-connecting two systems with the same
                    nominal frequency
                
                
                  C) eliminating reactive power requirement in the
                    operation
                  D) minimizing harmonics at the converter stations

                  
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          A
        
        
          

        
        
          3
          A bipolar junction transistor (BJT) is used as
            a power control switch by biasing it in the cut-off region (OFF
            state) or in the saturation region (ON state). In the ON state, for
            the BJT
        
        
          Options
          
            
                
              
                  A) both the base-emitter and base-collector
                    junctions are reverse biased
                  B) the base-emitter junction is reverse biased, and
                    the base-collector junction is forward biased
                
                
                  C)
                    the base-emitter junction is forward biased, and the
                    base-collector junction is reverse biased
                  
                  D) both the base-emitter and base-collector
                    junctions are forward biased
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          D
        
        
          

        
        
          4
          The Q - meter works on the principle of
        
        
          Options
          
            
                
              
                  A) mutual inductance 
                  B) self inductance

                  
                
                
                  C) series resonance 
                  D) parallel resonance
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          C
        
        
          

        
        
          5
          A 800 kV transmission line is having per phase
            line inductance of 1.1 mH/km and per phase line capacitance of 11.68
            nF/km. Ignoring the length of the line, its ideal power transfer
            capability in MW is
        
        
          Options
          
            
                
              
                  A) 1204 MW 
                  B) 1504 MW
                
                
                  C) 2085 MW 
                  D) 2606 MW
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          C
        
        
          

        
        
          6
          
            If the following program is executed in a icroprocessor, the
            number of instruction cycles it will take from START to HALT is
             
            

                
              
                  START MVI A, 14H ; Move 14H to register A

                    SHIFT   RLC           
                    ; Rotate left without carry

                                  JNZ
                    SHIFT ; Jump on non-zero to SHIFT

                                 
                    HALT
                
              
            
          
        
        
          Options
          
            
                
              
                  A) 4
                  B) 8
                
                
                  C) 13
                  D) 16
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          C
        
        
          

        
        
          7
          A moving iron ammeter produces a full scale
            torque of 240 mNm with a deflection of
            120° at a current of 10 A. The rate of change of self inductance (mH/radian)
            of the instrument at full scale is
        
        
          Options
          
            
                
              
                  A) 2.0 mH/radian          
                  B) 4.8 mH/radian
                
                
                  C) 12.0 mH/radian      
                  D) 114.6 mH/radian
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          B
        
        
          

        
        
          8
          At an industrial sub-station with a 4 MW load,
            a capacitor of 2 MVAR is installed to maintain the load power factor
            at 0.97 lagging. If the capacitor goes out of serivce, the load
            power factor becomes
        
        
          Options
          
            
                
              
                  A)  0.85 
                  B) 1.00

                  
                
                
                  C) 0.80 lag 
                  D) 0.90 lag
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          C
        
        
          

        
        
          9
          The conduction loss versus device current
            characteristic of a power MOSFET is best approximated by
        
        
          Options
          
            
                
              
                  A) a parabola

                  
                  B) a straight line

                  
                
                
                  C) a rectangular hyperbola

                  
                  D) an exponentially decaying function
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          A
        
        
          

        
        
          10
          If P and Q are two random events, then the
            following is TRUE

          
        
        
          Options
          
            
                
              
                  A) Independence of P and Q implies that probability
                    (P  Q
                    ) = 0

                  
                  B) Probability (P 
                    Q ) 
                    Probability (P) + Probability (Q)

                  
                
                
                  C) If P and Q are mutually exclusive, then they
                    must be independent

                  
                  D) Probability (P 
                    Q ) 
                    Probability (P)

                  
                
              
            
          
        
        
          

          

        
        
          Correct Answer
          D


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