BHARAT ELECTRONICS LIMITED1

BHARAT ELECTRONICS LIMITED
PAPER-I(ECE)
Their selection procedure consists of 2 stages written (technical+ apti.) and interview.
Generally the cut-off for the written examination was 100 out of 150. After clearing the written there is an interview round. Interview panel comprise of 5 members from electronics,computer.there is a negative mark for each wrong answer,generally it will be 0.25 or 0.50.For every right answer 1 mark is awarded. Generally the cut-off is 40%-50%
1. Data interpretation containing bar and pie chart in one question.
2. What is p.m and gain margin for stability-positive or negative?
3.Tunnel diode is a heavily doped p-n junction diode.
4. What is the dual of parallel r-c n/w.
5. Relationship puzzle.
6. Find phase crossover frequency when g(s)h(s) is given.
7. Question from pattern of radiation of different antenna.
8. The e. m wave varies as distance.-1/r,1/r2.
9. A transfer function having pole at right side is non-minimum phase system.
10.Proportional derivative controlled system has high sensitivity.
11.Lapalce transform of 1-10e-st.
12. Integration of cos2t dt.
13. The no. of samples for a convolution x(n),y(n) having x(n) of length 5 and y(n) of length 6.
14. State space representation find transfer matrix given a liner eq.
15.The value of carrier power when total power =10kw,m=0.6.
16. Superposition theorem is used for I,v,p..
17. Given a fm eq in standard form find frequency deviation.
18. The source of microwaves is klystron, impatt, twt, and magnetron.
19. Question on formulas of a-d and d-a converter.
20. In a squarer if 4 bit data is squared then the no of data lines and address lines are
21. Given a g(s) h(s) what is the no of zeros at infinity.
22. For a two ckt abcd parameter are given find the abcd parameter of cascaded ckt.
23. Question from transducer on tooth rotor.
24. Question on rubidium laser for its excitation.
25. Question from management point of view.
26. One easy puzzle of six rows one upon each other.
27. If a charge is at 002 and at 00-2 then electric field is in the direction of
28. The no. Of nand gate to implement a+ (nota) b+a (notb) c.

PAPER-II(ECE)
Part I---
Objective questions (40 with 1.5 marks each) with 50% -ve marking
1. Numerical problem based on modulation index fc, fm.......... (formula based direct queston).
2. Poles & zeroes are at .01,1,20,100...... find phase margin/angle at f=50Hz. ans -90(By drawing bode plot)
3.In n-type enhancement mode MOSFET drain current----------- options are- increase/decrease with inc/dec in drain/gate voltage. ans(d)
4. Gain of an directional antenna 6db P=1mw find transmitted power.........(use Ptr= G * P.)5.Multiplication of two nos 10101010 & 10010011 in 2's complement form..
6.A ckt is given suppplied with 15v with a series of resistance of 1k and a parallel combination of 12V zener diode and 2k resistance. FInd current through 2k resistance. ans: 6mA
7.A MP has 16 line data bus & 12 line addr bus find memory range..........Ans..4K(4*1024bytes)8.Divide by 12 counter require minimum ..... no of flip flops Ans. 4
9.Storage time in p-n junction.
10.Succesive approx. use in .... Ans ADC(analog to digital)
11.Pre-emphasis require in ......... low freq/high freq signal.
12.Handshake in MP ........... Ans to communicate with slower peripherals.
13. Binary equivalent of 0.0625 Ans. 0.0001
14.Which code is self complement of itself
15.Excess three code of an given binary no.
16.When we add 6 in BCD operations....... Ans. if result exceed valid BCD nos.
17.Shottky diode has better switching capability because it switch between.......
18.Figure of Merit is same as......
19.Swithcing in diode happens when....
20.During forward bias majority charge conc. in depletion layers inc/decrease.....
21.Channel capacity depend on....... Ans. Usable frequency or bandwidth
22.A 2kHz signal is passed through an Low pass filter having cut-off freq 800Hz o/p will be
23. Carrier amplitude 1v, peak to peak message signal 3mv find modulation index.
24.A 12V signal is quantized into two V/14 & 6 equal V/7 determine quantization error.
Part II True & false.....
(10 1 mark each) with 50% -ve marking
1.Power dissipation in ECL is minimum.......... False
2.Fourier Transform of a symmetric conjugate function is always real .... True
3.Divide by 12 counter requires a minimum of 4 flip flops.......True
4.Boron can be use as impurity to analyse base of a npn transistor.......True

PAPER-III(MECHNICAL ENGINEERING)
PHYSICS
1. pulley forms which pair? (TOM)
2. swinging pendulum: amplitude decreases/increases with time linearly or exponentially.
3. choose KE theory assumption.
4. Q on cohesive force.
5. what is DPT?
6. Variation of latent heat of vapourisation with pressure?
7. highest T of refrigerant shud be /=/<= critical temperature 8. for avoiding cavity what shud be NPSH? 9.working principle of jet engine? 10. choose dehumidification method. 11. highest calorific value : a)anthracite b)bituminous c)lignite.... 12. for max. capacity of compressor inlet T of air shud be: high, low,very high...... IC ENGINE
13. upper piston ring is COMPRESSION RING.
14. flywheel size for diesel engine in comarison with petrol engine.
15. compression ratio=?
16. volumetric efficiency=?
17.supercharging=?
ME:
18.sand moulding, dies & all those stuff.
19.part of a lathe which houses speed changing gears is?
20. splined shafts are preferred over keys, when?=when axial travelling is there.
MD:
21.what is ALLEN screw?
22. three Q from types of keys.
23. endurance strength?
24. FOS?
25. shear stress theory is used for DUCTILE materials.
26.crane hook material?
27. Surface hardness is improved by a) V b) Cr c) W d)all e)none
INTERVIEW (both technical & HR),(4 TO 1)
1.abt urself,family background.discuss hobbies.we discussed a lot on my hobby-trekking.
2.what is lathe?broaching?types of casting?xplain sand & centrifugal casting,types of welding?draw symbol of seam welding,xplain gas & electric arc welding.
3.draw SFD for UDL on simply supported beam.
4. what u learnt in MD? how shaft is designed? what is polar moment of inertia?
5.diff. terminologies in gear? what is backlash error?
6.material for blades of turbine,its properties.blades r bolted/welded?why?
7.draw carnot cycle(PV,TS diag.).xplain diff. processes.
8.diff. between otto & diesel cycle?
9.heat treatment processes?annealing?normalising?
10.loaded truss was given,draw FBD.
11.what is equilibrium?
12. slotting Vs shaping.
13.honning process?
14.why BEL?
15.in which department u would like to work? answer should be obviously diplomatic.
16.scope & application of all types of bearings with justification.
17. what r oil seals?why they r used?
18. basic purpose of turbines?their working principle?turbine efficiency?
19.draw joule/brayton cycle.
20.1st law of thermodynamics?
21. what is relative humidity?

PAPER-IV(COMPUTER SCIENCE)
General structure: totally 160 questions(2 30 hrs) Each carries 1 mark and 0.25 will be deducted for a wrong answer (NEGATIVE MARKING)
General aptitude: 30 questions
Technical :120 questions

General aptitude:
Data interpretation questions and passage (reading) ques - around 20 questions. some logical analysing questions( were simple)

1.Given probability for A to fail 0.5 and for B to fail 0.3 then what is the probability of either A or B fail?
2.Rita told mani tht," I saw a girl yesterday who is the youngest daughter of brother in law of my friend's mother"what is the relation between her friend and the girl she saw ?ans: cousin(chk)
3. 750 hrs of quality test was conducted on 10 components,at the end of 350 hr,a component failed.What is the probability of failure per hour?
4.Given the P(A) and P(B) and probability of occurence of both ...try to knw the logic to find probaility of neither A nor B.
Technical :
Concentrate more on numericals in core subject especially Computer architecture,Operating system,Computer networks,Data structure.
1. No. of crosspoints needed in a single stage switch having 40 inputs and 50 outputs?
ans: 2000
2.No. of crosspoints needed for 10 lines in a cross-point switch which is full duplex in nature and there is no self- connections is
ans: 100
3.when z-5i / z+5i = 1,where z=x+iy
a) lies on x-axis b) straight line c) circle passing through origin d) none
4.Gateway is applicable upto which layer
ans: Application layer
5.Questions to find the avg access time of cpu when hit ratio is 0.8 and time to access primary memory is 10ns and that of secondary memory 50ns?
(hints: h=0.8, c=10 ,M=50, avg acess time = hc +(1-h)M)
6.How many 256 * 1 RAM chips were needed for 1 K bytes of memory?
7.Disk scheduling problems -(dont remember it exactly)
8.Two represenations of zero in
a)prefered ans:sign magnitude b) 1's complement c) 2's complement d) none
as both sign magnitude and 1's complement hve 2 zero representations(chk)
9.Few questions from Theory of computation.
10.Problems from linear and quadratic hashing....
11.Knw all number conversions-hexa-dec,oct-dec,...........
12.Many problems like A needs 5 resources and B needs 6 resources of same type,then minimum resources needed so that deadlock will not occur?
13.Know to calculate waiting and turn around time
14.Size of the RAM required to find square of 4-bit no?
15.If x0=1 using Newton Raphson method,find x1 for x2 -1 =0?
16.Know the difference between first/second order and linear/non-linear differential equations?
17.Which one is a star LAN?
a)10Base5 b)10Base2 c)ans:10BaseT
18.In which 8B/6T encoding used?
a)ans:100BaseT4 b)100BaseFX….
19.MS-DOS IS
a)completely multiprogramming b)partially multiprogramming c) not a multiprogramming
20.A task is divided and computed in different processor is
Ans: Distributed processing
21.Token Ring is
Ans: 802.5
22.When token reached the intended recipient,then what it does?
Ans: >It recognizes its address, >copies the message, >checks for error, >changes 4 bits in the last byte of frame to indicate address recognized and frame copied.
23.Which one has the common database?
a) distance vector b) link state c)link vector ……
ans: link state
24.Hamming code related problems like minimum bits required for error detection
25.What addressing used in network layer?
Ans: logical addressing
26.A question was from TDM bus relating RAM (have a look on it)
27.Know what a microprogram and microcomputer ?
28.If the quantum size of RR increases then turn around time
Ans :increases
29.Questions like no of page frames replace using FIFO.
30.Questions from set associative mapping(numericals)
31.Know the range for sign –magnitute, 1’s complement, 2’s complement for n-bit no.?
32.no. of address lines in ROM is determined by
Ans: no. of input lines
33.Have a look on advantages and disadvantages of GO-BACK N ARQ and Selective Reject
34.Memory protection is of no use in
a) Single user system b)multiprogramming………
35.Auto variables when uninitialized will have
Ans: Unpredictable (garbage) value
36.Chart used for Scheduling
Ans: gantt chart

CANDIATE EXPERIANCE:
Its for CSE stream. Interview lasts for 40 minutes. As I have to face my ever first Job interview, am with little bit anxiety. Here are the details of the interview I would like to share with these magnificent group friends.As I entered in to the room by asking excuse me Sir, They invited me very politely and offered a chair to seat. There were four members in the panel all were in age group of 50, of which two members are from Central Research Laboratory of BEL grilled out me with tech questions. One is HR department person and remained was acts as head of the panel.First the head of the panel introduced all the members and explained the procedure of the interview. First he starts by describing about the company for almost five minutes, which makes me to relax and comfortable with the panel.
After that he asked to tell about myself briefly for a minute. While I am in a way of describing myself, he also asked to point out the achievements, strong points, hobbies and regarding sports.
Also asked for favorite subjects, and I told that C, Database and Networks are my favorites.Now it’s the time for technical grilling..
The first person from CRL starts by asking.....
What are the components of LAN? How do u connects the systems?
What is UTP? (Unshielded Twisted Pair)How much distance it supports?Fiber optic supports how much distance?
What is the throughput of the Ethernet LAN?
Describe about OSI Layers?In which layer encryption can be done?
And other than presentation layer?
What is the function of Bridge? Router?
Which layer is responsible for end 2 end connection?
What is RAID? (Redundant Array of Inexpensive Disks)For what it is used for?
How can achieve fault tolerance through RAID?
Where the Static variable stored in C?And local variables?( I was made a mistake here by telling it is also in heap)And he shows already written function prototypes asked to describe it.. as int *(*p)(int a, float b) // pointer 2 the function p returns integer pointer
int (*p)(int *a, float b) //pointer 2 the function p returns integer
int *p(int a, float *b) // function p returns integer pointer
int p(int a, float *b) // function p returns integer
now he looks as impressed and asked how to return 1000 variables from a function in C?
Now seen changes to second person of CRL.He asked to explain about my project? (It lasts for 4 minutes)
What are the functions of the OS?
Which OS you are familiar with?What is the process?
What r its attributes?How the process interacts with each others?
What r the mechanisms for inter process communication?
What is semaphore?
What is critical region?
How can semaphore avoid conflicts?
Again first person starts asking What is a virtual function?
What is late binding?
What is scope resolution operator?
Differentiate between testing and debugging? (here I take time 2 distinguish )Distinguish black box testing and white box testing?
What is unit testing?
How can u control the lost acknowledgement issue?
Is there is any difference between switch and hub?
Which is good? ( here again I wasn’t answered properly) And some more questions I wasn’t reminded correctly..After that head of the panel gestures to HR to ask questions What do u prefer to be a team leader or team member?
What r the qualities u have for being a leader?
How can u solve the conflicts in a team?
How can u react if some one else competing with u in urteam for promotion?
Again head asks meWhat is your reaction if some one copying in the exam?
Can u tell me a instance in your college that insists your leadership attitude?
Have u ever short tempered?Have u attended any interviews?
Is u don’t have campus?
And he gestures to HR to explain pay and bond detailsHe told that first 6 months will be the training period after that for three years u will be appointed as probationary engineer, and also told that based on our performance promotion will be carried out early or late.For this probationary engineer u can draw 2.65 laks per anum with all allowances, and u have to execute a bond of Rs50000/- for three years effects from date of appointment after training.And now head asks for any questions from me.
I was asked the same qns What is the career path?When can I know the results?
Why u were not strong in media advertisements?