One Stop GATE Forum: 2005- year EE GATE Paper

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 1.  In the matrix equation Px = q, which of the following is a necessary condition for the existence of at least one solution for the unknown vector x: 
  (a)  Augmented matrix [P q] must have the same rank as matrix P 
 (b)  Vector q must have only non-zero elements 
 (c)  Matrix P must be singular 
 (d)  Matrix P must be square 

2.  Which three-phase connection can be used in a transformer to introduce a phase 
difference of 30° between its output and corresponding input line voltages 
  (a)  Star - Star  (b)  Star - Delta  (c)  Delta - Delta  (d) Delta - Zigzag 

 3.  The p.u. parameters for a 500 MVA machine on its own base are: 
   inertia M = 20 p.u.;   reactance X = 2 p.u. 
The p.u. values  of inertia and reactance on 100 MVA common base, respectively, 
are 
  (a)  4, 0.4  (b)  100, 10  (c)  4, 10  (d) 100, 0.4 

4.  An  800  kV  transmission  line  has  a  maximum  power  transfer  capacity  on  the 
operated  at  400  kV  with  the  series  reactance  unchanged,  the  new  maximum 
power transfer capacity is approximately  
P   (d)  4
P  
  (a)  P  (b)  2P  (c)  2

5.  The insulation strength of an EHV transmission line is mainly governed by 
 (a)  load power factor     (b)  switching over-voltages 
 (c)  harmonics      (d)  corona 

6.  High Voltage DC (HVDC) transmission is mainly used for 
 (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 

7.  The Q-meter works on the principle of 
 (a)  mutual inductance    (b)  self inductance 
 (c)  series resonance      (d)  parallel resonance 

 8.  The  8085  assembly  language  instruction  that  stores  the  contents  of  H  and  L 
     registers into the memory locations 2050  and 2051 ,
     H H respectively, is: 
     (a)  SPHL  2050H   (b)  SPHL  2051H   (c)  SHLD  2050H   (d) STAX 2050H  

9.  A  digital-to-analog  converter  with  a  full-scale  output  voltage  of  3.5V  has  a   resolution close to 14 mV. Its bit size is: 
  (a)  4  (b)  8  (c)  16  (d) 32 

10.  The  conduction  loss  versus  device  current  characteristic  of  a  power  MOSFET  is best approximated by 
  (a)  a parabola      (b)  a straight line 
 (c)  a rectangular hyperbola 
 (d)  an exponentially decaying function 

11.  A three-phase diode  bridge rectifier is fed from a 400V RMS, 50 Hz,  three-phase AC source. If the load  is purely resistive,  the  peak instantaneous  output voltage is equal to 
  (a)  400 V  (b)  3V   (c)  2v d) 200v

12.  The output voltage waveform of a three-phase square-wave inverter contains 
 (a)  only even harmonics    (b)  both odd and even harmonics 
 (c)  only odd harmonics    (d)  only triplen harmonics 

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Smitha Newbie Joined: 08Feb2007 Online Status: Offline Posts: 14	Topic: 2005- year EE GATE Paper Posted: 14Feb2007 at 11:29am
	1. In the matrix equation Px = q, which of the following is a necessary condition for the existence of at least one solution for the unknown vector x: (a) Augmented matrix [P q] must have the same rank as matrix P (b) Vector q must have only non-zero elements (c) Matrix P must be singular (d) Matrix P must be square 2. Which three-phase connection can be used in a transformer to introduce a phase difference of 30° between its output and corresponding input line voltages (a) Star - Star (b) Star - Delta (c) Delta - Delta (d) Delta - Zigzag 3. The p.u. parameters for a 500 MVA machine on its own base are: inertia M = 20 p.u.; reactance X = 2 p.u. The p.u. values of inertia and reactance on 100 MVA common base, respectively, are (a) 4, 0.4 (b) 100, 10 (c) 4, 10 (d) 100, 0.4 4. An 800 kV transmission line has a maximum power transfer capacity on the operated at 400 kV with the series reactance unchanged, the new maximum power transfer capacity is approximately P (d) 4 P (a) P (b) 2P (c) 2 5. The insulation strength of an EHV transmission line is mainly governed by (a) load power factor (b) switching over-voltages (c) harmonics (d) corona 6. High Voltage DC (HVDC) transmission is mainly used for (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 7. The Q-meter works on the principle of (a) mutual inductance (b) self inductance (c) series resonance (d) parallel resonance 8. The 8085 assembly language instruction that stores the contents of H and L registers into the memory locations 2050 and 2051 , H H respectively, is: (a) SPHL 2050H (b) SPHL 2051H (c) SHLD 2050H (d) STAX 2050H 9. A digital-to-analog converter with a full-scale output voltage of 3.5V has a resolution close to 14 mV. Its bit size is: (a) 4 (b) 8 (c) 16 (d) 32 10. The conduction loss versus device current characteristic of a power MOSFET is best approximated by (a) a parabola (b) a straight line (c) a rectangular hyperbola (d) an exponentially decaying function 11. A three-phase diode bridge rectifier is fed from a 400V RMS, 50 Hz, three-phase AC source. If the load is purely resistive, the peak instantaneous output voltage is equal to (a) 400 V (b) 3V (c) 2v d) 200v 12. The output voltage waveform of a three-phase square-wave inverter contains (a) only even harmonics (b) both odd and even harmonics (c) only odd harmonics (d) only triplen harmonics Post Resume: Click here to Upload your Resume & Apply for Jobs

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