Sample papers >>  
More Papers >>                                 Recruitment Pattern
WIPRO  - Question paper - 25    Conducted On -- 2002   

                             
 PART - 1 ( same for all departments ) , Total 55 questions
 Q1 - 30 +2 level PCM,  Q31-50 aptitude  Q51-55 algorithm 

1) An electron can move freely in the field of  an em  wave.In which direction does it move? a)in the direction of 

     elec. field
      b)in the direction of magnetic field
      c)in the direction of propagation of em wave
      d)in a plane containing magnetic field & direction of  propagation of wave   

     Ans . (a)
2)  A man measures the length of a rod . In the first case the man is  moving  & in the second case the rod is 

     moving. Will there be any change in the measurement of length ?

3)  The wavelength of X-rays lies
       a) above a certain minimum value     b) below a certain maximum value
       c) above a certain minimum and below a certain maximum value
       d) above a certain maximum and below a certain  minimum value Correct

       answer (c) 
4) Toluene + chlorine in presence of ferric  chloride gives

     a) metachlorotoluene  b) ortho & para chlorotoluene
      c) benzoyl chloride  d) …..    answer (b)> > 

.5) Mechanism by which a proton …….. 

       a) metamerism                b) tautomerism

       c) structural isomerism    d) …… 

       Ans: c
6)  Acidic effect is shown by
     a) CO3- -       b) NO3-          c) I-           d) OH  probably

    Ans: c

7) Which is correct ?

    a) 40 ml of hydrogen sulphide & 40 ml of chlorine gives 120 ml of gas under stp

    b) …gram equivalent weight…
     c) …normality…. d) …. 

 

.8) In how many ways can 7 distinct toys be  distributed among 3 children ?

     a) 3^7     b) ..         c) 7p3           d)7c3> > 
      ans :a


9)   One series is 17,21,25,29….Another series is 16,21,26,31…. Sum of first 100 terms common to both 

      series is 

     ans: 101100 

10)  There are 10 letters . How many 5 lettered words can be formed  if the  letters may be repeated ?

      ans 10^5 
11) A answers a question correctly in 80% cases  & B answers the same question correctly in 70% cases .What 

     is the probability that both  will not  answer correctly is 

      ans : 1-((7/10)*(8/10)) 

12) A & B think of a no. between 1 & 25 . If the  nos. match they win a  prize .What is the probability that they 

      win in the first attempt ?
       a) 1/25     b) 24/25      c) 2/25          d) none           ans :1/25 

13) Solve differential equation dy = (sec x + y  tan  x) dx. 

      Ans: y cos x = x
14) Solve differential equation xdy - ydx + logxdx = 0 at ( x = 1 y = 1)

  15) Evaluate ς(2x-3)/(x*x + x + 1)**2 dx
         Ans: - 1/(x*x + x+ 1) +constant 
16)  Find the value of f(0) when f(x) = {1-cosx(1-cosx)}/x**4 is continuous.
17)  Find the value of Lt { ex dx}/{ e2x  dx } [Lower lim=0,> Upper  lim=x in both integrals] 
18)  Given x = sin inverse t, y = log ( 1 - t *t ) Find (d/dx)(dy/dx) at t = 0.5 

      ans : (-8/3) 
19) There are two groups having 5 questions in each  group . In how many ways can you answer 6 questions

     taking maximum 4 from each group ? 

    a)150 b)200 c)250 d)300  ans :d 

20 ) There are 3 persons A,B,C.Find the probability that A will come first and B will come before C. ans : 1/6 
 21) Sum of series 1 + ( 1+1/n) + 2(1+1/n)^2 + 3(1+1/n)^3 + … to n  terms is

22) 100 drops each of charge .. and radius … are joined to form a single drop. Which of the following is correct ?
23) Value of a to make the function…….. 
24) Arrange in the order of acidity of phenol, o-chlorel, nitro benzene
25) Two atoms having same atomic number and mass  number are called  

    a. isotope     b. isobar        c. isomer     d. isotone.> Ans : b
   (same aomic number is called isoope,same neurons called isoone) 


26) A water drop having 0.3 micro coulomb charge in the field 50  volts per metre.> What is the force ?

 

                               Aptitude
 
31-33 (see GRE analytical ability)A Co. has to select 4 mechanical engineers out of 3 senior ( X,Y,Z)& 4 junior (A,B,C,D). 2 should be senior & 2 should  be junior. Following combinations are not allowed i) A and Y ii) Z 

and C iii) A and B

31  If A is selected who else are selected ? correct

      answer : X,Z,D 
34  The letters SURITI are arranged in all possible ways and the words are Arranged in alphabetical order.What is 

     the rank of  the word SURITI ?
       a) 245      b)307 …    

35-36 In a certain code X………….. is written as 6………
 35  What will be MOON in that code ?  ans : 2778
36  Which word will have the code SOFT?  correct 

     ans FEAT 
37-39 A question is followed by 2 conditions A and B . Mark
      a)  only A is sufficient, B not necessary.
      b)  only B is sufficient, A not necessary.
      c)  A alone sufficient, B alone sufficient.
      d) A and B together are necessary 

     A.) x**2 + 1 = 0 B). x**3-1 = 0

    Ans: b 
38) One man is standing near a light post of height 18 ft . What is the length of the shadow?

      A). height of man is 6 ft. B)he is  standing 20 ft away from lamp post. 

39 One train T1 starts from a town P towards Q .Another T2 starts  from Q towards P .They meet at C .Which 

     train has greater velocity ? A) T2 reaches C before T1 B) ….

     Ans. a 
40-42 see GRE logical ability e.g All cats are dogs All dogs are rats Q. an organic comp. Having the fwg. 

    Components, c=40%, h 6.6%, o=53.3 %. Find the empirical formula. Ans. CH2O.


          PART -2 (ELECTRICAL) 20 questions

56) A gas is taken from state P1,V1,T1 to state P2,V2,T2 by two
      different  paths. Which is constant ?

     a) dW b) dQ c) dQ - dW  d) dQ + dW  ans : c 

57 In a triode valve the value of saturation current can be increased by 

    a) increasing grid voltage                         b) increasing plate voltage
      c) increasing separation between ………. d) Inc. temp. of cathode 

     ans : d
58 For producing photoelectricity collector is placed vertically  over emitter & light is incident .An elec. field is 

    applied downwards .What happens ?

    a) photocurrent increases              b) K.E. of emitted electrons increases

    c) ….                         d) ….        ans:  (b)
59 In machines interpoles are provided
     a)…..          b) to improve comutation   c)…..       d) due to variation of air gaps   ans b
60 In a CRO a beam has a horizontal swap of 1000Hz.It has 2 phases per cycle…..What is the rate of vertical 

    sweep ?

     a)500Hz        b) 1000Hz           c) 2000Hz         d)5000Hz
61 A condensor has dielectric of thickness 3 cm and permittivity 4 Another dielectric of thickness 4 cm and  

     permittivity x is inserted so that capacitance of condensor is now 1/3 rd of original capacitance . Value of x is

     Ans 3.3 
62  In a 3-phase 4-pole induction motor slip = 4%.Rotor speed = 720 rpm Supply frequency is 

     Ans: 25Hz 
 63) The stator of induction motor has supply  frquency 50 Hz when  rotor is circuited . The rotor is rotated at 1800 

     rpm in  the direction of stator RMF. The value of rotor frequency is 
64 Which two of the following are in time domain ?

      i) Nyquist plot  ii) Root locus iii) Routh - Hurwitz iv) Bode Plot 
65   The no. of zeroes in  K(s+2)/s(s+2-j4)(s+2+j4) is
       a) one       b) two            c) three           d) none

66  Routh Hurwitz criterion gives
       a) no. of roots to the right of jw axis
       b) no. of roots to the left of jw axis
      c) no. of roots to the right of jw axis & on it
      d) no. of roots to the left of jw axis & on it 
67 An induction motor shows loss of torque with vibrations. Possible cause is

    a) bearings need greasing     b) there is short circuit        c)….       d) …. 
68 In an RLC circuit R=20 ohm , L=0.5 H , C=10 microfarad.The resonant    frequency , bandwidth ,…. are 

     ans . 1414   rad/sec……. 
    

 Copyright © 2004 Freshersworld.com, All rights reserved.