HAL Placement Papers

#11 March 15th, 2013, 02:17 PM

Hello sir give me Hal placement papers because I need it.

Kesari · #12 March 16th, 2013, 03:11 PM

Hindustan Aeronautics Limited Halavionics Division invites applications from the eligible candidates in the prescribed proforma fulfilling the requirement for the following Assistant Welfare Officer 2Assistant Engineer(Civil)I 3Assistant Engineer(Mechanical) HAL 2013 recruitment notification.

The Tentative schedule of the selection process is as follows:

Announcement of the Short listed candidates for Written Test (on HAL Website) 05.04.2013

Date of Written Test 28.04.2013

Declaration of Written Test result (on HAL Website) 29.04.2013

Date of Interviews : 30.04.2013

Here is paper of HAL placement in attactment

Nilesh · #13 March 2nd, 2014, 11:00 AM

As you are looking to get sample question papers of HAL Placement Exam, so here I am providing the following sample papers:

HAL Sample Placement Paper 1

1. When length of a wire increases its resistance
a. doubles b. half c. remains same
Ans: ( a )

2. When a 50 Hz ,6-pole Induction Motor runs at 975rpm,the rotor emf frequency is
a. 12.5Hz b. 1.25Hz c. 4Hz
Ans: ( b )

3. When a 6 pole 50Hz Induction Motor runs at 1450 rpm , it’s working mode is
a. motoring b. braking c. generating
Ans: ( a )

4. Slips for Different modes of operation of Induction Motor are
answer: motoring -01

5. Damping ratio ( ξ ) is 0.75, natural frequency is 12 rad/s are given & asked to find peak time

6. In electrodynamo-meter type wattmeter
a. pressure coil is made fixed
b. current coil is made fixed
c. both the coils are made fixed
Ans: ( a )

7. In flux meter control torque is produced by
a. weights attached to it.
b. Springs
c. No control torque is there
Ans: ( c )

8. One question regarding hot wire instrument

9. In MI meters deflecting torque is proportional to
a. square of the current
b. square of the voltage
Ans: ( a )

10.In 3-Φ system total power is given by
a. √3VLILcos Φ
b. 3VLILcos Φ
c. VLILcos Φ
Ans: ( a )

11.From supply one 3-Φ step-down transformer is drawing 10 A, the secondary current will be
minimum when the transformer is
a. star-delta
b. delta-star
c. delta-delta
d. star-star
Ans: ( b )

12.Transformer rating is expressed in
a. KVA
b. KVAR
c. KW
Ans: ( a )

13.Manganin is a
a. Insulator
b. Semi-conductor
c. Alloy

14.Dual scope oscilloscope has
a. two separate horizontal and two separate vertical plates
b. one horizontal and two separate vertical plates
c. two separate horizontal and one vertical plates
d. one horizontal and one vertical plates

15.Standard Cell voltage is measured by
a. MI meter
b. MC meter
c. Potentiometer

16.The input resistance of the CRO is of the order of
a. tens of ohm
b. mega ohm
c. kilo ohm
d. fraction of an ohm
Ans: ( b )

17.Errors are introduced in Wheatstone bridge due to
a. lead resistance
b. contact resistance
c. some thing is given
d. all of the above

18.HRC fuse and circuit-breaker combination is used CB operates for
a. low over-load currents
b. high over-load currents
c. combination is never used

19.G(s) = K / s(s+5)(s+1) is given to find the value of K for stable operation

20.By increasing gain of the system root locus will
a. moves away from poles
b. moves away from zeros
c. crosses imaginary axis
Ans: ( a )

21.When the load current is high while measuring power using wattmeter
a. current coil is connected near load
b. pressure coil is connected near load

22.C = 0.01µF and L = 1 mH and current is 10 A and asked to find the voltage drop
23.Transmission line is terminated by R and no reflection is there , then the value of R is
_________
Ans: 400 ohm
24.One question regarding shunt ohm-meter and seriea ohm-meter

25.Inverted V curves are drawn between ________
Ans: field current Vs power factor

HAL Sample Placement Paper 2

General Knowledge :- 30 Questions
Electronics :- 70 Questions

1 :- General Knowledge

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:--

2:- 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

G.K:
Author of “the great Indian story”.
Author of ”making globalization work”.
Captain of the 2006 world cup winning italian football team.
Full form of the acronym CITES.
Period of the fourth five-year plan.
In which year did the turks conquer Constantinople .

HAL Sample Placement Paper 3
General Awareness
1.The Kaziranga national park in Assam is famous for ----------------
A) one horn rhinoceros B)white tiger C)Impale D)none of these ans a
2.The old name of Delhi was ----------------
a) Indrastuptha b)gaya c) pataliputra d) ayodhya
3. All the electioneering campaign has to end --------------
a) before 48 hrs of polling b) before 48 hrs of commencement of results c) before 36 hrs of polling
d) before 72 hrs of polling
4. In 1590 , when Portuguese first visited the island Taiwan they named it as
a) Taliban b)mayanmar c) forusa(spelling missing ) d) none of these
5.According to Indian mythology Ravana was well skilled in playing --------
a) sitar b)sarood c)Harmonium d) fluete
6.which of the following is not a beach in Goa --------------- no idea about options
7.which hindi (b/w) film was first converted to color---------------
a) Moghal E Azam b) Alam Ara c) Satya Harishchandra d) none
8.Which of the following book is not written by Charles Drekens …………………. no idea about
options English related ……………….
9.Escape : Abscond :---------------------------
10.inception : Conclusion :---------------------------
11. the appropriate meaning of Ocular in the following is --------------------
12.Which hand you use to write-----------? A)about b) on c) in d) with
13. He is in the habit --------------(find ) new things a) in finding b) of finding c) with finding d)to
finding
14.Phoebe was in the car when her phone is ringing ------------------ rewrite the sentence without
changing the meaning
15. She was in the kitchen when the telephone was ringing ---------------- rewrite the sentence
16. All his friends are older -----------him a)to b)than c)for d)from
17. you ------------be careful when you want not to be blamed a)have to b) has to c) had to d) none of
these
Section two……………… mental ability and Quant ……..
18. what is the next number in the series . 4, -8,16,-32,64,
a)192 b) 256 c)-128 d)128 ans c
19. odd men out …. 3,5,7,11,12,13,17,19
a) 3 b) 7 c)12 d)19 ans c
20.in the following series which is not correctly fit 7,8,18,57,228,1165,6996
a)7 b)57 c)228 d) none of these ans c
21. odd men out 583, 462, 792,427,132
a) 462 b)427 c) 132 d) 792 ans b
22. if x>y and x2-2xy + y2 -9=0, x +y = 15 …what is the value of x
a)3 b)12 c)10 d)9 ans d
23. how many times in day the hands of a clock are straight
a) 48 b)44 c)22 d) 24 ans b
24.which of the following numbers is divisible by 3,7,9 and 11
a)2079 b) 1266 c)1165 d) none of these ans a
25.Odd men out sitar, veena, tumpura ,sarood
26. Odd men out cricket, boxing, golf, tennis, hockey, football, bowling
a) cricket b)bowling c) golf d) boxing
Three Questions were given on figures like what is the next figure in sequence
Section three ……..Technical Related to digital electronics
27.the radix or base of hexadecimal number system is -----------a) 8 b)16 c)5 d)none of these
28.the no of 1’s in the binary representation of the expression 162*9+162*7+16*5+3 are ………….
a)10 b)23 c)6 d)4
29. the no of latches in F/F are -------
a)1 b) 2 c) 3 d)4
30.how many flip-flops are required to construct Mod -12 counter
a)5 b)4 c)12 d)none
31. which logic gate has the output is compliment of its input ----------
a) OR b) AND c)NOT d) X-OR
32.no.of 2-input multiplexers needed to construct a 210 input multiplexer…….
a) 12 b)31 c)20 d)16
33.By adding inverters to the inputs and output of a AND gate we can obtain ……………
a ) OR b) AND c)NOT d) X-OR
34.how many NAND gates are needed to realize OR gate --------------
a)1 b) 2 c) 3 d)4
35.which is the first integrated logic family ---------------
a) RTL b)DTL c)TTL d) none of these
36.The advantage of CMOS over TTL are---------------
37.the range of allowable voltages for CMOS are----------------
38.the voltages required to 0 and 1 in TTL family are -----------------
39. Which logic gate has output high if and only if all inputs are low ---------?
a) NOR b)NAND c) X-NOR d)AND
40.According to Boolean algebra 1+A+B+C =
a) A b) A+B+C c)1 d) none of these
41. If a=0x6db7 and b=0x2ae9 then what is the value of a”b--------------
Questions related to C ……
42.which of the following is not a primitive type in C
a)Int b)Float c) Char d) noneof these
43.If you want to accept variable no of arguments then you have to include which of the following
header files
a) Vararg.h b) stdarg.h c) stdlib.h d) stdioh
44. Register variables are stored in ----------------
a) CPU b) main memory c) secondary memory d) peripheral memory
45.what are pointers , when declared , initialized to --------
a) Garbage b)NULL c)0 d) nothing
46.When you divide a program into functions-----------------
a) it is easy to conceptualize and runs faster than usual
b) it is easy to conceptualize
c) it runs faster than actual one
d) none
47. In order to use a pointer it has to be ----------------
a) declared b) declared and initialized c) no need of declaration d) initialized
48.what is the output of the following program snippet
Int a=6,b=4; Pirntf(“%d”, a==b); a) Prints 6 b)prints 0 c)Prints 1 d) prints 6 4
49.what is the output of following code segment Char wer[3][4] = { ‘per’,’max,’min’}; Char ( *ptr)
[4]=wer; Printf(“%d%d”,ptr,ptr++);
a)262 262 b)262 263 c)262 265 d0262 266
50.if we give 12345 through scanf what are the values stored at a,b,c Int a,b,c; Scanf(“%d%d%d”,
&a,&b,&c);
a)a=12, b=34,c=5 b)a=12345 and nothing at b,c c)c=12345 and nothing at a,b d)an error message
51.what is the value stored in S Char s[4]; Scanf(“%s”, ‘1234’);
a)1234 b) 1 c) garbze d) error
52.what is the output if we give abc through scanf Char x,y,z; Printf(“%d”,scanf(“%c%c%c”,
&x,&y,&z));
a) prints 3 b) prints 1 c) error message d) prints nothing
53. A variable declared as “ unsigned U” then u is interpreted as
a) unsigned char b) unsigned int c) unsigned float d) the declaration is not possible
54.char c;Printf(“%d”, c); prints ----------------
A negative integer b)always positive integer c) garbage d)none
97.What is the output of the following program
Int a=1;
Printf(“%d”,(a++));
a)1 b)2 c)error message d) none
98.which of the following is incorrect about ++ operator
It is a unary operator b) it can be used in expressions c) left as well as right associative d) can be
overloaded
Questions related to TOC and LP
55.Two languages S and T represented by the regular expressions s=(a+b*) T=(a+b)* then the
relation between them is a)s
56.The language L={an bn cn /n=1,2,3,4………} is
a) not context free language but its complement is I CF
b) a context free language
c) a context free language and accepted by Push Down Automata
d) a context sensitive language
57.Finite State Automation -----------------device
a) repeater b) acceptor c) divider d) adder
58.The language L={anbn /n=1,2,3,4…………} can be generated from
a) S? ab/aSb/€
b) S? aaSbb/ab
c)S? abb/aSb
d) ab/aSb
58.The regular expression (a/b) generates the set
a) {a} b) {b} c{a,b} d) none
59.The regular expression (a/b)* represents
a) all combinations of a or b and same as (a*b*)*
b) all combinations of a or b and not same as (a*b*)*
c) all combinations of a and b , same as (a*b*)*
d) all combinations of a and b not same as (a*b*)*
60.Context sensitive Languages are ---------
a) super set of context free languages and accepted by Push Down Automata
b) super set of context free languages and accepted by non deterministic PDA
c) Accepted by Turing machines only d) none of the above statements are correct
61.Any context free Grammar can be converted into
a) Chomsky Normal Form b) GreiBack Normal form c) CNF and GBNF d) none
62. If a grammar is left-recursive and right-recursive to a non-terminal symbol then the grammar is
a) Ambiguous b) Unambiguous c) the information provided is not sufficient to determine d) none
63.FSA can be used to add two Integers -------------
a)TRUE b) may be TRUE c)FALSE d ) may be FALSE
64.context sensitive languages are -----------
a) accepted by push down automata b) accepted by non-deterministic pushdown automata
c) accepted by 2- way linear bounded automata d) a& c
65.The difference between the Moor and Mealay machines is
a) the former one depends on the present state and present inputs
b) the former one depends on the present state only
c) the later depends on the present state and present inputs
d) the later depends on the present input only
66 An FSA can be stated as -----------
A Turing machine with finite tape, unidirectional moment
A Turing machine with finite tape and bidirectional moment
A Turing machine with finite tape , unidirectional and no repetitions
A Turing machine with infinite tape , unidirectional and no repetitions
67.Recursive Languages are ------------
a) super set of all languages
b) type -8 grammar languages
c) accepted by Turing machine
d) we cant say anything about acceptance
68.which of the following statement is wrong about regular expressions
a) there exists a FSM to accept regular expression
b) there exists a N-FSM to accept regular expression
c) there are no ? symbols in regular expression
d) none
69. Regular expression cannot be used in which of the following
a) construction of text editors
b) design of serial circuits
c) design of compilers
d) finding text patterns
Questions related to hardware and OS
70.the term “memory” is related to
a) input and output b) storage c) ALU d) none
71. which of the following is not a Operating system
a)AIX b)PROLOG c) WINDOWS d) UNIX
72.The CPU or MPU consists of
a) input and output b) memory c) ALU d) All of the above
73. In a multiprogramming system
a) there are more than one processor
b) program are executed faster than actual
c) used in case of large programs only
d) more programs executed than actual in given time
74.the front side bus (FSB) also called as
a) control bus b) the processor bus c) PCI bus and processor bus d) none
75.which language is used Artificial Intelligence SYSTEMS
a) Java b) c# c) prolog d) Lisp
76.what is the capacity of Hollerith card when it is in extended state
a) 32kb b) 120 kb c) 240 kb d) 20 kb
77.how many slots are there for UTM device
a)1 b) 2 c) 3 d) 4
78.which part of the computer has the capability to acces memory and manipulate the memory
contents a) input/output b) cpu d) ALU d) none
79. the register which is used to locate the address of the operands and restore the contents is
a) memory address register b) memory data register c) instruction register d) none
80.the opcode --------------
a) tells the address of operands b) instructs the processor c) stores the values d) specifies the operation
81.the language first executed by microprocessor is
a) BASIC b) FORTRAN c) PASCAL d) MODULA
82. which language most suitable for mathematical calculations
a) FORTRAN b) PASCAL c ) C++ d) NONE
Questions related to C++ and OOPs they asked around 20 qs on this (5+ related to friend function)
83.the protected members are -------------
a) accessible within the class only b) accessible within the class and derived class c)cannot be accessed
outside the class d)can be accessed anywhere
84.By default the access specifier is -------------- a)private b)public c)protected d)none
85. A class is a -----------------
a) a abstract data type b) way of encapsulating data and code c) structure d)………….
86.which function can access the private members of a class ------------
a) any function b) member function of derived class c) friend function of that class d) friend function
of derived class
87.In order to access the private members of four classes that function has to be declared as friend of
-----------------------
a) any one class b) all four classes c)any three classes d) any two classes
88.when a class is derived from another derived class then that inheritance is called ----------
a) multiple b) multipath c) hybrid d) multilevel
89.which of the following are correct about A static member function
a) it has only one copy for all instances and it can access constant variables
b) it has separate copy for each instances
c) it cannot operate on constant variable
d)……………………………..
90.you are hiding the data when you are writing
a) a class b) cryptic code c) static function d) ADT
91. In order to declare a member function of one class as a friend of another class we need to use
a) the key word Friend b) the key word friend and scope resolution c) only scope resolution d) nothing
Question s from Discrete mathematics (only 2)
92. there are 100 nodes in a graph . if two nodes i ,j are said to be adjacent then |i-j|=12 or 8.
How many connected components in the above graph a)4 b) 8 c) 12 d) 25
93.in case of a binary tree all parent nodes are having degree 2 and in the child level the child are
associated to left . what is the name of the tree a) full binary tree b) complete binary tree c) threaded
binary tree d) none
DAA
94.what is the worst case complexity of bubble sort
a) O(n) b) O(logn) c) O(nlogn) d) O(n2)
95.which of the following sorting technique performs well when the element are in reverse order
a) bubble sort b) insertion sort b) mergesort d) heap sort
96.in which type of searching we can search the element in O(1) time averagely
a) linear search b) radix search c) hash based search d) binary search