HAL ELECTRONICS PAPER 2010

1. Lucknow is popular for which fruit: –
a) Mango b) Orange c) Water fruit
2. Governor of utter Pradesh
3. President of India
4. In which district of UP a oil refinery is found
5. Pigeon is the indication of
6. The chemical Formula of salt
7. Republic day in India is celebrated on
8. The “Beating the retreat” hasn’t celebrated on republic day, what is its resion…
9. Lucknow city is located near which river
10. Firozabad is popular for
11. Renukot is popular for
12. The first prime minister of India
13. The first President of India
14. The birth day of Pandit Jawahar Lal Nehru is celebrated as:-
15. The writer of ‘Godan’
16. Word ‘Agfa’ is related to:–
B. Electronics Questions.
1. When the temperature of the room increased then the energy of semiconductor…
2. Power diode is generally made from: – Silicon/Germanium/Both/None of these
3. Thermionic Emission of electron is due to………….
4. When the both junction of NPN diode is reverse biased, then the diode is in which mode: –
a) Active b) Cutoff c) Saturation d) inverted
5. Which transistor mode gives the inverted output: –
a) Common Emitter b) Common Base c) Common Collector d) None of these
6. Which coupling gives the higher gain in case of amplifier: –
a) Capacitor coupling b) Impedance coupling c) Transformer coupling
7. Which distortion is least objectionable in audio amplification: –
a) Phase b) Frequency c) Harmonic d) Intermediation
8. A narrowband amplifier has a band pass nearly…………of central frequency:-
a) 33.3% b) 10% c) 50%
9. Frequency of wein bridge oscillator
10. Phase shift oscillator consists: –
a) RL b) RC c) RLC
11. Crystal oscillator frequency is very stable due to:-
12. Multivibrater Produces: –
a) Sine wave b) Square wave c) Smooth wave d) sawtooth
13. Convert the 101101 Binary number into octal no: –
a) 65 b) 55 c) 51 d) 45
14. 10 in BCD: –
a) 10100 b) 1100 c) 010111 d) None of these
15. Which PNP device has a terminal for synchronizing purpose:-
a) SCS b) Triac c) Diac d) SUS
16. In 3-Phase full converter, the output during overlap is equal to……………..
17. Addition of indium in semiconductor crystal makes: –
a) PNP b) NPN
18. Free electron exists in which band: –
a) 1 b) 2 c) 3 d) Conduction band
19. Ripple factor of half wave rectifier: –
a) 1.21 b) 0.48 c) 0.5
20. Efficiency of half wave rectifier: –
21. Transistor that can be used in enhancement mode:-
a) NPN b) UJT c) JFET d) MOSFET
21. Following contributes to harmonic distortion in Amplifier: –
a) +Ve feedback b) –Ve feedback c) Defective active device
22. High cutoff frequency: –
a) CB b) CC c) CE
23. Which is used as data selector?
a) Encoder b) Decoder c) modulator d) Demodulator
24. Read write capable memory: –
a) RAM b) ROM c) Both d) None of these
25. When modulation frequency is doubled, modulation index also doubled in case of: –
a) FM b) PM c) AM d) PM & FM
26. Term ’Noise temperature’ is used for
27. Video detector used in TV receiver is a….
a) Diode detector b) Ratio detector c) Phase detector
28. Which isn’t directly operated from mains: –
a) Half wave rectifier b) Centre tap rectifier c) Bridge rectifier d) Voltage doubler
29. In 3-Phase half wave rectifier each diode conducts for duration of: –
a) 30 Degree b) 45 Degree c) 60 Degree d) 180 Degree
30. If number of phase in a multiphase rectifier increased then: –
a) Output increased b) Output decreased c) Output smooth d) No change
31. Which output requires minimum filtration: –
a) Half wave rectifier b) full wave c) SCR half wave rectifier d) Voltage doubler
32. Identify the under circuit
a) Low pass filter b) High pass filter c) Band pass filter
33. Transistor is a following operated device: –
a) Low voltage & low current device
b) Low voltage & high current device
c) Low current & high voltage device
d) High current & high voltage device

HAL Executive Trainees (Technical ) Sample Questions

Aeronautical Engineering

1. Air Fuel ratio in a jet engine will be of the order of:
(a) 10:1 (b) 15:1
(c) 20:1 (d) 60:1
2. Fighter bombers use following type of engine:
(a) Turbo-jet (b) Turbo-propeller
(c) Rocket (d) Ram-jet

Mechanical Engineering

1. Least shrinkage allowance is provided in the case of following:
(a) Brass (b) Aluminium
(c) Cast Iron (d) Steel
2. If V is the volume of metal in a casting and A its surface area, the time of solidification will be proportional to:
(a) V, 1/A (b) V,1/A2
(c ) V2 ,1/A (d) V2, 1/A2
Fire tube boilers are limited to a maximum design working pressure of :
(a) 1 kg/cm2 (b) 6 kg/cm2
(C) 17 kg/cm2 (d ) 100 kg/cm2

Metallurgy

1. A dislocation represented by T is called:
(a) Positive edge dislocation
(b) Negative edge dislocation
(c) Positive screw dislocation
(d) Negative screw dislocation
2. The recrystallisation temperature of a cold worked material decreases with:
(a) Increase in the degree of deformation
(b) Increase in the initial grain size
(c) Increase in the temperature of cold working
(d) The presence of impurity

Electrical Engineering

1. In a thyrister full converter feeding a continuous load current, what is the duration each thyrister conducts in a cycle?
(a) 60 0 (b) 90 0
(c) 120 0 (d) 180 0
2. In a three-phase induction motor, the rotor field runs at the following speed with Respect to the stator structure:
(a) At synchronous speed in the direction of stator field
(b) At a slip speed in the direction of stator speed
(c) At synchronous speed in a direction opposite to that of stator field
(d) At zero speed

Electronics

1. In the hybrid parameter model of a transistor reverse transfer voltage ratio and forward transfer current ratio are respectively given by:
(a) h11 and h21 (b) h12 and h11
(c) h21 and h11 (d) None of these
2. A Signal x(t) has the Fourier transform
X(?) = { 1 for | ? | < }W . Its first zero-crossing in time domain occurs at:
O otherwise
(a) 1/pW (b) W
( c) p/ W (d) None of these

Computer Science

1. Magnetic tapes are suitable to applications:
(a) When only a few records are to be accessed
(b) When most of the records are to be accessed
(c) Only when all the records are to be processed
(d) None of the above
2. A system in which 2 or more cpu’s are interconnnected and share a common
Main memory is called:
(a) Pipeline machine
(b) Multifunctional system
(c) Multiprocess
(d) None of these

HAL EXAM PAPER

1. Magnetic tapes are suitable to applications:
(a) When only a few records are to be accessed
(b) When most of the records are to be accessed
(c) Only when all the records are to be processed
(d) None of the above
2. A system in which 2 or more cpu’s are interconnnected and share a common Main memory is called:
(a) Pipeline machine
(b) Multifunctional system
(c) Multiprocess
(d) None of these
Q1.Functional Dependency is:-
a)a type of constraint
b)data constraint
c)varies with time
d)none of these
ans:-a
Q2.which of the following is an atomic transaction:?
a)a transaction in which all the instructions are either committed or aborted
b)a transaction which consists of only one instruction
c)a transaction in which all instructions are committed.
d)none of these
ans:- a
Q3.Find the sign-and-magnitude of 22.5625
ans:- 0,1110.1001(check)
Q4. which of the following is/are true about 1's and 2's complements:
i)In 1's complement form. 0 has two representations
ii)in 1's complement, the magnitude of lowest number is equal to the magnitude of highest number
iii)In 2's complement, 0 has two representations
a)i only b)i and ii
c)iii only d)all of these
Q5.if(base
{
cout<<"recovery stable"<
}
else
{
cout<<"recovery unstable"<
}
which of the values will print "recovery stable"?
a)base=8,height=8
b)base=3 height=2
c)base=5 height=3
d)base=4 height=7
ans:-d
Q6.which are the major components of a computer?
a)CPU,monitor,keyboard,RAM,mouse
b)sound card,modem,printer
c)CPU,RAM,sound card
(I don't remember exactly,but the option was a) )
Q7. which of the addressing modes require largest memory access time?
a)Direct
b)Indirect
c)base Index
d)PC relative
ans:b
Q8.Network Protocol doesn't consists of which of the following:
a)character Length
b)baud length
c)BIOS
d)none of these
ans:c
Q9.A token while passing from one token ring network to another requires the services of:
a)a simple bridge
b)a transparent bridge
c)repeater
d)router
ans: b
Q10. some questions were from mathematics like matrix,vectors,differential equations
Q11. vande mataram was derived from the book :
a)an and math
b)geetanjali
c)life of pie
d)none of these
ans:a
Q12.which desert-country pair is correctly matched?
a)Kalahari-Asia
b)Sahara-Australia
c)Gobi-Mongolia
d)Thar-America
ans:c
Q13.who excavated mohenjo-daro :
a)W.C.banerjee
and some more options were there
Q14.calorimeter measures:
a)quantity of heat generated
b)heat radiation
c)temperature
d)none of these
ans:b
29. apttitude ques of pipes and cisterns, compound interest, time and distance, cubes, hcf and lcm, multiplication,
34. there were 4 questions like if A*B represents Ais the son of B, C/D represents Cis the husband of D then how A and D are related.
1) What is the distance between the EHV lines?
a)8m b)11m c)4m d)14m
2) At present how many HVDC lines are there in india?
a)none b)one c)two d)more than two
3) Where is the nuclear located in following places?
ans: i dont remember the answers, but one of them is thalcher(orissa)
4) What is the approximate peak overshoot for a unity feedback system with damping factor 0.6?
a)10% b)5% c)15% d)20%
5) What is the distance between the EHV lines and earth?
a)8m b)11m c)18m d)15m
6) On no load in EHV lines what is the relation between receinving and sending end voltage?
ans: receiving end voltage > sending end voltage
7) What is the surge impedance loading of 400kv line?
ans: 4002/400ohms =400watts
8) similar question with surge impedance given as 160 ohms
ans: 1000watts
9) If both the juctions of transistor are forward biased, in wat region transistor works
ans: saturation region
10) Where is the hydel power plant located in following places?
ans: I dont remember the places
11) self GMD is used in the calculation of_______
a) inductance only
b) inductance and capacitance
c) capacitance only
d) none
12) What is the GMD if the distance between the lines are 6m,6m,12m?
ans: 7.058m( approx)
13) Zero sequence currents doesn't exist in the following fault
a) L-G
b) L-L
c) L-L-G
d) L-L-L-G
Ans: d
14) To avoid arcing connect sutable value of ________ in earthing.
a) capacitance
b) indunctance
c) resistance
d) susceptance
15)There are two to three questions based on Laplace and Inverse Laplace transforms
16)In the following type of conductors the corona is minimum
a) circular
b) stranded
c) helical
d) rectamgular
ans: c
17)When do two wattmeters show same value of opposite readings in two wattmeter method
a) 300 lag
b) 600 lag
c) between 600 and 900 lag
d) zpf lag
ans: d
18) Schering bridge is used to measure
a) frequency
b) inductance
c) capacitance
d) mutual inductance
and: c
19) What is the value of resistance when both length and diameter of the wire are doubled?
ans: halved
20) There is one questions asked on euler's formula..
21) What is the Laplace transform of unit ramp signal?
ans:1/s2
22) What happens to the value of inductance when self GMD is doubled?
23) At what frequency corona loss is more?
a) 50Hz
b) 60Hz
c)
d)
24) What is the largest rating of alternator manufactured in india?
a) 1000MW
b) 500MW
c) 1200MW
d) 250MW
ans:b
25) The response of an RLC circuit for impuse input?
a) exponentially raising
b) sinusoidal
c) exponential falling
d) parabolic
ans: c
26) What is the easier method for finding no. of poles in the right half of s-plane?
a) Niquist plot
b) R-H criterion
c) Root-Locus method
d) Polor plot
ans: b
27) How many no of poles located in the right half of s-plane for the characteristic equation...
28) Burden of current transformers is measured in..
a) Watts
b) Volt Amperes
c) Ampere Hours
d) Joules
29)What is the gate used to get high output when all the inputs are low?
a) NOR
b) NAND
c) Ex-OR
d) Ex-NOR
ans: b
30) Large no of thyristors are used in HVDC transmission to improve______
a) current rating
b) voltage rating
c) Thyristers are available at high ratings
d)
31) What is the line current of a circuit when the current transformer of 1000:5 rating measures 4Amperes?
ans: 800A
32) If the time delay of relay with TMS setting 0.1 is 10 sec, then what is the time delaty when the TMS setting is changed to 0.5
33) How many no of flip-flops are required to get 16 bit counter?
34) _________is connected to reduce frequency errors in ammeter.
a) shunt capacitor
b) series inductance
c) shunt inductance
d)
35)What is the value of ripple factor in Half Wave Rectifier?
a) 1.11
b) 0.8
c) 1.21
d)
36)The principle used in megger?
a) electrostatic effect
b) magnetic effect
c) Induction effect
d)
37)In electrodynamometer type wattmeter the error is due to..
a) pressure coil inductance
b) pressure coil resistance
c)
d)
38) In the following locations where is hydal power plant is not located?
ans: i dont remember the places
39) In distribution lines_____
a) X/R<0.1
b) X/R>10
c) X/R>1
d) X/R<0.01
40) In EHV lines _____
a) X/R=10
b) X/R=100
c)
d)
41) What is the speed of 2 pole alternator at 50Hz frequency?
ans: 3000rpm
42) What is the equivalent decimal no of (624)8
43) What is the binary equivalent of 6.25
44) What is the value of A+AB+B¯ ( B bar)
ans: 1
45) What are the avg and rms values of full wave rectifier
ans: 2Vm/pie, Vm/21/2
46) There is one question based on rank of matrix
47) What is the equivalent of cos(wt+18.750)
a) sin(wt+71.250)
b) sin(wt-71.250)
c) sin(wt+18.250)
d) sin(wt-18.250)
48) The three harmonics will be in phace with each other?_____
a) 3,5,15
b) 2,4,6
c)
d)
ans: a
49) The line current will be equal to phase current in______
ans: delta connection
50) In windmills the frequent problems occur in______
a) mechanical system
b) blades
c) electrodynamic system
d) electric system
51) The machine used in windmills is______
a) alternator
b) induction generator
c)
d)
ans: b
52) Insulators in EHV lines are designed based on_____
a) switching voltages
b) peak voltages
c) corona
d) lightning voltages
ans: a
53) The value of restriking voltage depends on______
a) inductance of line
b) capacitance of line
c) both
d) none
Q1.Functional Dependency is:-
a)a type of constraint
b)data constraint
c)varies with time
d)none of these
ans:-a
Q2.which of the following is an atomic transaction:?
a)a transaction in which all the instructions are either committed or aborted
b)a transaction which consists of only one instruction
c)a transaction in which all insrtuctions are committed.
d)none of these
ans:- a
Q3.Find the sign-and-magnitude of 22.5625
ans:- 0,1110.1001(check)
Q4. which of the following is/are true about 1's and 2's compements:
i)In 1's complement form. 0 has two representations
ii)in 1's complement, the magnitude of lowest number is equal to the magnitude of highest number
iii)In 2's complement, 0 has two representations
a)i only b)i and ii
c)iii only d)all of these
Q5.if(base
{
cout<<"recovery stable"<
}
else
{
cout<<"recovery unstable"<
}
which of the values will print "recovery stable"?
a)base=8,height=8
b)base=3 height=2
c)base=5 height=3
d)base=4 height=7
ans:-d
Q6.which are the major components of a computer?
a)CPU,monitor,keyboard,RAM,mouse
b)sound card,modem,printer
c)CPU,RAM,sound card
(I don't remember exactly,but the option was a) )
Q7. which of the addressing modes require largest memory access time?
a)Direct
b)Indirect
c)base Index
d)PC relative
ans:b
Q8.Network Protocol doesn't consists of which of the following:
a)character Length
b)baud length
c)BIOS
d)none of these
ans:c
Q9.A token while passing from one token ring network to another requires the services of:
a)a simple bridge
b)a transparent bridge
c)repeater
d)router
ans: b
Q10. some questions were from mathematics like matrix,vectors,differential equations
Q11. vande mataram was derived from the book :
a)anand math
b)geetanjali
c)life of pie
d)none of these
ans:a
Q12.which desert-country pair is correctly matched?
a)kalahari-asia
b)sahara-australia
c)gobi-mongolia
d)thar-america
ans:c
Q13.who exavated mohenjo-daro:
a)W.C.banerjee
and some more options were there
Q14.calorimeter measures:
a)quantity of heat generated
b)heat radiation
c)temperature
d)none of these
ans:b

HAL PLACEMENT PAPER 2007

Q1.Functional Dependency is:-
a)a type of constraint
b)data constraint
c)varies with time
d)none of these
ans:-a
Q2.which of the following is an atomic transaction:?
a)a transaction in which all the instructions are either committed or aborted
b)a transaction which consists of only one instruction
c)a transaction in which all instructions are committed.
d)none of these
ans:- a
Q3.Find the sign-and-magnitude of 22.5625
ans:- 0,1110.1001(check)
Q4. which of the following is/are true about 1's and 2's complements:
i)In 1's complement form. 0 has two representations
ii)in 1's complement, the magnitude of lowest number is equal to the magnitude of highest number
iii)In 2's complement, 0 has two representations
a)i only b)i and ii
c)iii only d)all of these
Q5.if(base
{
cout<<"recovery stable"<
}
else
{
cout<<"recovery unstable"<
}
which of the values will print "recovery stable"?
a)base=8,height=8
b)base=3 height=2
c)base=5 height=3
d)base=4 height=7
ans:-d
Q6.which are the major components of a computer?
a)CPU,monitor,keyboard,RAM,mouse
b)sound card,modem,printer
c)CPU,RAM,sound card
(I don't remember exactly,but the option was a) )
Q7. which of the addressing modes require largest memory access time?
a)Direct
b)Indirect
c)base Index
d)PC relative
ans:b
Q8.Network Protocol doesn't consists of which of the following:
a)character Length
b)baud length
c)BIOS
d)none of these
ans:c
Q9.A token while passing from one token ring network to another requires the services of:
a)a simple bridge
b)a transparent bridge
c)repeater
d)router
ans: b
Q10. some questions were from mathematics like matrix,vectors,differential equations
Q11. vande mataram was derived from the book :
a)an and math
b)geetanjali
c)life of pie
d)none of these
ans:a
Q12.which desert-country pair is correctly matched?
a)Kalahari-Asia
b)Sahara-Australia
c)Gobi-Mongolia
d)Thar-America
ans:c
Q13.who excavated mohenjo-daro:
a)W.C.banerjee
and some more options were there
Q14.calorimeter measures:
a)quantity of heat generated
b)heat radiation
c)temperature
d)none of these
ans:b

HAL Placement Paper

HAL (Hindustan Aeronautics Ltd) - Sample Placement Question Papers
GENERAL INSTRUCTIONS TO CANDIDATES APPEARING FOR THE COMPETITIVE WRITTEN TEST OF TWO AND A HALF HOURS DURATION FOR SELECTION AS EXECUTIVE TRAINEES (TECHNICAL )


· The Question Booklets are broadly classified into five Disciplines as indicated below:
1) Aeronautical
2) Mechanical and Production
3) Metallurgy
4) Electrical and Electronics
5) Computer Science
· Each Question Booklet will have 160 Objective Type Questions, as indicated below:
General Awareness
(15 Questions)
General Engineering
(25 Questions)
Questions specific to the respective Disciplines indicated above (120 Questions)
Total
(160 Questions)
15 Marks
25 Marks
120 Marks
160 Marks
Notes
1. The Question Booklet for Mechanical and Production Disciplines will be the same and candidates will have to answer
questions for both Mechanical and Production Branches.
2. The Question Booklet for Electrical and Electronics Disciplines will be the same and candidates will have to answer
questions for both Electrical and Electronics Branches.
· There are no negative marks for incorrect answers.
· Please use the blank pages provided at the end of the Question Booklet only for any rough work.
· If any Candidate is found to be indulging in any kind of malpractice like copying, trying to talk to other candidates,
exchanging information, carrying/passing on chits of paper or any other mode to communicate with others, his/her
candidature shall be cancelled.
· Mobile Phones, Pagers, Beepers, any kind of Audio Devices, Digital Diaries, Organisers etc., shall not be permitted inside
the Examination Hall.
· Candidates will be required to appear for the Written Test at their own expense and will have to make their own
arrangements for boarding and lodging at the place of the Examination.
· Further consideration of the candidature after the Written Test will be subject to:-
1. Candidates having passed the final Engineering Examination in the specified Branches of Engg. indicated in the
Advertisement, from any recognised Institution/University, with 60% marks in the Aggregate of all Semesters for
General/OBC and 50% Marks in the aggregate of all Semesters for SC/ST Candidates.
2. Verification of Qualifications, Marks scored, Age, Caste (for SC/ST/OBC only), PWD (Person with Disability) /Ex-
Servicemen etc.
IMPORTANT
Candidates must ensure that they are in possession of the following documents/items, when they report at the Examination
Centre:
· Admit Card (with Passport Size photograph duly affixed).
· Proof of Identity having their photograph such as Passport, Voters’ ID Card, Driving License, ID Card issued by
the Academic Institution last attended etc., for verification by the Invigilator.
· HB Pencils, Eraser, Pen and Calculator.

HAL Placement Paper

HAL (Hindustan Aeronautics Ltd) - Sample Placement Question Papers

1. partial differntiation of x^3*y^3/(x+y)^3
2. some points like (0,2,4), (2,5,-1) and (6,2,0) were given and were asked to find whether it is parabola, eclipse, carboid or
cycloid.
3. there were so mant conversion questions like binary to decimal, decimal to binary, decimal to oct, binary
mulitiplicationsetc.
4. some Laplace formula related to sine and cosine terms.
5. fouries series of quarter symmetry
6. by applying rouths Hurwitz criterion we were suppose to find the number of roots the equation was something like
2s^4+s^3+4s^2+s i think so
7. damping is proportional to gain, sqrt of gain, 1/gain or 1/sqrt of gain
8. vocabulary like germs:disease::, emulate:mimic::,
9. there questions about power plants like which plant correspond es to highest capital cost, highest running cost,lowest
operational cost, efficiency of thermal plant
10. what is the present capacity of unit generation 200MW, 210 MW, 375MW or 500 MW
11. where in nuclear power plant is located like kota, talcher, kolghat,
12. there was 1 question realed to idduki, ramagundam power plants i dont know whether it is the odd 1 out of the hydro
plants
13. there was 1 repeated questions related to the spacing b/w the phase conductors like 11m, 8m, 20m, 24m.
14. is meager related to hot wire instrument,moving coil or moving iron.
15. 1 question related to load factor.
16. in a two w/m method what is the condition for which both the w/ms are equal and opposite.
17. question based on inverter gate
18. question related to maximum overshoot.
19. 2 or 3 questions were related to step input, impulse i/p etc.
20. 1 question related to boolean algebra
21. some questing related to find the value of lambda to get no solution.
22. 1 question was related to find from the options of nquist criteria, bode plot, routh Hurwitz,
23. question related to expontial rise and fall of inductor.
24. given 2 poles and 50 hz freq to find the syn speed.
25. question based on inertia constant and p.u. values
26. question bead on power transfer capacity and voltage
27. SIL of 400 KV lines
28. 2 questions based on maximum power transfer capacity from circuit theory.
29. attitude ques of pipes and cisterns, compound interest, time and distance,cubes, hcf and lcm,multiplication,
30. for how many days there will food if 2 persons are supposed to leave. question related to this were asked.
31. questions related to angles i don't remember the questions i remember only the options like pi/3, pi/6,pi/4. 1, -1, 1/2
1/sqrt2. etc
32. question's based on P&V, P&Q, V&delta.
33. how many HVDC links are presently in use in India.
34. there were 4 questions like if A*B represents Ais the son of B, C/D represents Cis the husband of D then how A and D
are related.
35. to sort the odd number out from a box of given numbers.
36. Vrms and Vo of full wave rectifier
37. reflection coefficient of current of an open ended line.

HAL Placement Paper

HAL (Hindustan Aeronautics Ltd) - Sample Placement Question Papers

1) What is the distance between the EHV lines?
a)8m b)11m c)4m d)14m
2) At present how many HVDC lines are there in India?
a)none b)one c)two d)more than two
3) Where is the nuclear located in following places?
Ans: i don't remember the answers, but one of them is thatcher(orissa)
4) What is the approximate peak overshoot for a unity feedback system with damping factor 0.6?
a)10% b)5% c)15% d)20%
5) What is the distance between the EHV lines and earth?
a)8m b)11m c)18m d)15m
6) On no load in EHV lines what is the relation between receiving and sending end voltage?
Ans: receiving end voltage > sending end voltage
7) What is the surge impedance loading of 400kv line?
Ans: 4002/400ohms =400watts
8) similar question with surge impedance given as 160 ohms
Ans: 1000watts
9) If both the junctions of transistor are forward biased, in what region transistor works
Ans: saturation region
10) Where is the hydel power plant located in following places?
Ans: I don't remember the places
11) self GMD is used in the calculation of_______
a) inductance only
b) inductance and capacitance
c) capacitance only
d) none
12) What is the GMD if the distance between the lines are 6m,6m,12m?
ans: 7.058m( approx)
13) Zero sequence currents doesn't exist in the following fault
a) L-G
b) L-L
c) L-L-G
d) L-L-L-G
Ans: d
14) To avoid arcing connect suitable value of ________ in earthing.
a) capacitance
b) inductance
c) resistance
d) susceptance
15)There are two to three questions based on Laplace and Inverse Laplace transforms
16)In the following type of conductors the corona is minimum
a) circular
b) stranded
c) helical
d) rectangular
Ans: c
17)When do two watt meters show same value of opposite readings in two watt meter method
a) 300 lag
b) 600 lag
c) between 600 and 900 lag
d) zpf lag
ans: d
1 scheming bridge is used to measure
a) frequency
b) inductance
c) capacitance
d) mutual inductance
and: c
19) What is the value of resistance when both length and diameter of the wire are doubled?
ans: halved
20) There is one questions asked on Euler's formula..
21) What is the Laplace transform of unit ramp signal?
ans:1/s2
22) What happens to the value of inductance when self GMD is doubled?
23) At what frequency corona loss is more?
a) 50Hz
b) 60Hz
c)
d)
24) What is the largest rating of alternator manufactured in India?
a) 1000MW
b) 500MW
c) 1200MW
d) 250MW
ans:b
25) The response of an RLC circuit for impulse input?
a) exponentially raising
b) sinusoidal
c) exponential falling
d) parabolic
ans: c
26) What is the easier method for finding no. of poles in the right half of s-plane?
a) Nyquist plot
b) R-H criterion
c) Root-Locus method
d) Polor plot
ans: b
27) How many no of poles located in the right half of s-plane for the characteristic equation...
2 Burden of current transformers is measured in..
a) Watts
b) Volt Amperes
c) Ampere Hours
d) Joules
29)What is the gate used to get high output when all the inputs are low?
a) NOR
b) NAND
c) Ex-OR
d) Ex-NOR
ans: b
30) Large no of thyristors are used in HVDC transmission to improve______
a) current rating
b) voltage rating
c) Thyristors are available at high ratings
d)
31) What is the line current of a circuit when the current transformer of 1000:5 rating measures 4Amperes?
ans: 800A
32) If the time delay of relay with TMS setting 0.1 is 10 sec, then what is the time delaty when the TMS
setting is changed to 0.5
33) How many no of flip-flops are required to get 16 bit counter?
34) _________is connected to reduce frequency errors in ammeter.
a) shunt capacitor
b) series inductance
c) shunt inductance
d)
35)What is the value of ripple factor in Half Wave Rectifier?
a) 1.11
b) 0.8
c) 1.21
d)
36)The principle used in megger?
a) electrostatic effect
b) magnetic effect
c) Induction effect
d)
37)In electrodynamo meter type watt meter the error is due to..
a) pressure coil inductance
b) pressure coil resistance
c)
d)
3 In the following locations where is hydal power plant is not located?
ans: i don't remember the places
39) In distribution lines_____
a) X/R<0.1
b) X/R>10
c) X/R>1
d) X/R<0.01
40) In EHV lines _____
a) X/R=10
b) X/R=100
c)
d)
41) What is the speed of 2 pole alternator at 50Hz frequency?
ans: 3000rpm
42) What is the equivalent decimal no of (624)8
43) What is the binary equivalent of 6.25
44) What is the value of A+AB+B􀳦 ( B bar)
ans: 1
45) What are the avg and rms values of full wave rectifier
ans: 2Vm/pie, Vm/21/2
46) There is one question based on rank of matrix
47) What is the equivalent of cos(wt+18.750)
a) sin(wt+71.250)
b) sin(wt-71.250)
c) sin(wt+18.250)
d) sin(wt-18.250)
4 The three harmonics will be in phase with each other?_____
a) 3,5,15
b) 2,4,6
c)
d)
ans: a
49) The line current will be equal to phase current in______
ans: delta connection
50) In windmills the frequent problems occur in______
a) mechanical system
b) blades
c) electrodynamic system
d) electric system
51) The machine used in windmills is______
a) alternator
b) induction generator
c)
d)
ans: b
52) Insulators in EHV lines are designed based on_____
a) switching voltages
b) peak voltages
c) corona
d) lightning voltages
ans: a
53) The value of restriking voltage depends on______
a) inductance of line
b) capacitance of line
c) both
d) none

HAL Placement Paper

HAL (Hindustan Aeronautics Ltd) - Sample Placement Question Papers
Aeronautical Engineering

Air Fuel ratio in a jet engine will be of the order of:
(a) 10:1 (b) 15:1
(c) 20:1 (d) 60:1
Fighter bombers use following type of engine:
(a) Turbo-jet (b) Turbo-propeller
(c) Rocket (d) Ram-jet
Mechanical Engineering
Least shrinkage allowance is provided in the case of following:
(a) Brass (b) Aluminium
(c) Cast Iron (d) Steel
If V is the volume of metal in a casting and A its surface area, the time of solidification will be proportional
to:
(a) V, 1/A (b) V,1/A2
(c ) V2 ,1/A (d) V2, 1/A2
Fire tube boilers are limited to a maximum design working pressure of :
(a) 1 kg/cm2 (b) 6 kg/cm2
(C) 17 kg/cm2 (d ) 100 kg/cm2

Metallurgy

1. A dislocation represented by T is called:
(a) Positive edge dislocation
(b) Negative edge dislocation
(c) Positive screw dislocation
(d) Negative screw dislocation
2. The recrystallisation temperature of a cold worked material decreases with:
(a) Increase in the degree of deformation
(b) Increase in the initial grain size
(c) Increase in the temperature of cold working
(d) The presence of impurity

Electrical Engineering

1. In a thyrister full converter feeding a continuous load current, what is the duration each thyrister conducts
in a cycle?
(a) 60 0 (b) 90 0
(c) 120 0 (d) 180 0
2. In a three-phase induction motor, the rotor field runs at the following speed with Respect to the stator
structure:
(a) At synchronous speed in the direction of stator field
(b) At a slip speed in the direction of stator speed
(c) At synchronous speed in a direction opposite to that of stator field
(d) At zero speed

Electronics

1. In the hybrid parameter model of a transistor reverse transfer voltage ratio and forward transfer current
ratio are respectively given by:
(a) h11 and h21 (b) h12 and h11
(c) h21 and h11 (d) None of these
2. A Signal x(t) has the Fourier transform
X(?) = { 1 for | ? | < }W . Its first zero-crossing in time domain occurs at:
Otherwise
(a) 1/pW (b) W
( c) p/ W (d) None of these

Computer Science

1. Magnetic tapes are suitable to applications:
(a) When only a few records are to be accessed
(b) When most of the records are to be accessed
(c) Only when all the records are to be processed
(d) None of the above
2. A system in which 2 or more cpu’s are interconnnected and share a common
Main memory is called:
(a) Pipeline machine
(b) Multifunctional system
(c) Multiprocess
(d) None of these

HAL EXAM

GENERAL INSTRUCTIONS TO CANDIDATES APPEARING FOR THE COMPETITIVE WRITTEN TEST OF TWO AND A HALF HOURS DURATION (1030 HOURS TO 1300 HOURS) FOR SELECTION AS EXECUTIVE TRAINEES (TECHNICAL ) ON SUNDAY, THE 19^TH SEPTEMBER, 2004

·         Kindly appear for the Written Test on the specified Date and  Time  at the allotted Test Venue.

·         Make sure that you occupy the allotted seat at the Test Venue by 0950 hours, which will be displayed on the Notice Board.

·         Candidates are required to bring  any proof of their identity having their photograph viz Passport, Voters’ ID Card, Driving License, ID Card issued by the Academic Institution last attended etc., for verification, when they come for the Written Test. The Admit Card shall be signed by the Candidates in the presence of the Invigilator. Candidates should affix their passport size photograph on the Admit Card.

·         Candidates have to ensure that they return the Admit Card, OMR Answer Sheet and the Question Booklet  to the Invigilator  after the Written Test, failing which their candidature shall be cancelled.

·         The Question Booklets  are  broadly classified into five Disciplines as indicated below: 

      1)    Aeronautical
2)     Mechanical and Production
3)    Metallurgy
4)    Electrical and Electronics
5)    Computer Science 

·         Each Question Booklet will have 160 Objective Type Questions, as indicated below: 

General Awareness (15 Questions)	General Engineering (25 Questions)	Questions specific to the respective Disciplines indicated above (120 Questions)	Total (160 Questions)
15 Marks	25 Marks	120 Marks	160 Marks

 Notes

1.      The Question Booklet  for Mechanical and Production Disciplines will be the same and candidates will have to answer questions for both Mechanical and Production Branches.

2.      The Question Booklet  for Electrical and Electronics Disciplines will be the same and candidates will have to answer questions for both Electrical and Electronics Branches. 

·         There are no negative marks for incorrect answers.

·         Please use  the blank pages provided at the end of the Question Booklet only for any rough work.

·         If any Candidate is  found to be indulging in any kind of malpractice like copying, trying to talk to other candidates, exchanging information, carrying/passing on chits of paper or any other mode to communicate with others,  his/her candidature shall be cancelled.

·         Mobile Phones, Pagers, Beepers, any kind of Audio Devices, Digital Diaries, Organisers etc., shall not be permitted inside the Examination Hall.

·         Candidates will be required to appear for the Written Test at their own expense and will have to make their own arrangements for boarding and lodging at the place of the Examination.

·         Further consideration of the candidature after the Written Test  will be subject to:- 

1.      Candidates having passed the final Engineering Examination in the specified Branches of Engg. indicated in the Advertisement, from any recognised Institution/University, with 60% marks in the Aggregate of all Semesters for General/OBC and 50% Marks in the aggregate of all Semesters for SC/ST Candidates.

2.      Verification of  Qualifications, Marks scored, Age, Caste (for SC/ST/OBC      only), PWD   (Person with Disability) /Ex-Servicemen etc. 

IMPORTANT 

Candidates must ensure that they are in possession of the following documents/items, when they report at the Examination Centre:

·         Admit Card (with Passport Size photograph duly affixed).

·         Proof of Identity having their photograph such as Passport, Voters’ ID Card, Driving License, ID Card issued by the Academic Institution last attended etc.,  for verification by the Invigilator.

·         HB Pencils, Eraser, Pen and  Calculator.
                                                                                                                     

INSTRUCTIONS TO CANDIDATES  FOR ANSWERING ON THE OMR ANSWER SHEET 

1. Use only HB Pencil  to  mark the Ovals  in the Answer Sheet.  

2. Use Ball Point Pen  to  fill the Boxes  (ie for the Question Booklet No., Roll Number, Date of Birth and Signature.) 

3. Indicate  the Question Booklet Series and Question Booklet Serial Number in the  space  provided on the OMR Answer Sheet without fail.  
4. Please mark the relevant Ovals against the columns like Series, Category, Quota and Main Branch of Engineering as applicable to you.
5. Mark your answer only in the appropriate space against the Number corresponding to the question you are  answering. Darken the response for each question:  

                                                A        B          C            D

                                        (ie., if the  answer to the Question is option A , then it needs to be darkened )  

6.  Please ensure that the Ovals are completely darkened.

7. In case of any mistake while marking, please erase the mark completely and fill the correct Oval  again. Do not leave stray marks/half filled Ovals on the Answer Sheet.
8. Rough work must not be done on the Answer Sheet.  Use the blank pages  given at the end of the Question Booklet for rough work. 

Sample  Questions for the Executive Trainees (Technical ) Test

 Aeronautical Engineering 

1. Air Fuel ratio in a jet engine will be of the order of: 

(a) 10:1                       (b) 15:1
(c)  20:1                      (d) 60:1 

2. Fighter bombers use following type of engine:

(a) Turbo-jet                (b) Turbo-propeller
(c)  Rocket                   (d)  Ram-jet

Mechanical Engineering           

1. Least shrinkage allowance is provided in the case of following:

(a) Brass                      (b) Aluminium
(c) Cast Iron                (d) Steel 

2. If  V  is the volume of metal in a casting and A its surface area, the time of solidification will be proportional to:

(a) V, 1/A                     (b) V,1/A²  
(c ) V² ,1/A                   (d) V^2, 1/A² 

3. Fire tube boilers are limited to a maximum design working pressure of :

(a) 1 kg/cm2                 (b) 6 kg/cm2
(C) 17 kg/cm2              (d ) 100 kg/cm2 

Metallurgy

1.      A dislocation represented by T is called:

      (a)    Positive edge dislocation
(b)    Negative edge dislocation
(c)    Positive screw dislocation
(d)   Negative screw dislocation

        2.      The recrystallisation temperature of a cold worked material decreases with: 

      (a)    Increase in the degree of deformation
(b)   Increase in the initial grain size
(c)    Increase in the temperature of cold working
(d)   The presence of impurity

 Electrical Engineering

 1.      In a thyrister full converter feeding a continuous load current, what is the duration each thyrister conducts in a cycle?

(a) 60 ⁰             (b)  90 ⁰
(c) 120 ⁰           (d)  180 ⁰ 

2.      In a three-phase induction motor, the rotor field runs at the following speed with Respect to the stator structure: 

      (a) At synchronous speed in the direction of stator field
(b) At a slip speed in the direction of stator speed
(c) At synchronous speed in a direction opposite to that of stator field
(d) At zero speed

Electronics 

1.      In the hybrid parameter model of a transistor reverse transfer voltage ratio and forward transfer current ratio are respectively given by:

(a) h_{11 and}  h₂₁         (b) h₁₂ and h₁₁
(c) h₂₁ and h₁₁        (d) None of these

2.      A Signal x(t) has the Fourier transform

          X(ω) = { 1 for | ω | < }W  . Its first zero-crossing in time domain occurs at:

       O otherwise

          (a) 1/pW           (b) W
          ( c)  p/ W          (d) None of these

Computer Science

 1.      Magnetic tapes are suitable to applications:

      (a)    When only a few records are to be accessed
(b)   When most of the records are to be accessed
(c)    Only when all the records  are to be processed
(d)    None of the above

2.      A system in which 2 or more cpu’s are interconnnected and share a common

Main memory is called:

      (a)    Pipeline machine
(b)    Multifunctional system
(c)    Multiprocess
(d)   None of these