| Post Name | ASSISTANT PROFESSOR - ELECTRONICS AND COMMUNICATION ENGINEERING |
|---|---|
| Department | TECHNICAL EDUCATION - ENGINEERING COLLEGES |
| Question Paper Code | 062/2016 |
| Date of Test | 6 May 2016 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Article 56 of Indian constitution declares :
Answer
D. Term of office of president
2
Among the following which is not a sub clause of Article 19;
Answer
A. Right to establish and maintain institutions for religious and charitable purposes
3
According to Article 315, Public Service Commission is :
Answer
C. An independent expert body
4
A Proclamation of Emergency issued under clause (1) of article 352 may be varied or revoked by :
Answer
B. Asubsequent proclamation
5
5 ‘he article which states that the president shall appoint a person who is qualified to be
| appointed a judge of Supreme Court to be Attorney-General for India.
Answer
B. Article 76
6
The length of Tran-Siberian rail road :
Answer
B. 9289 km |
7
Mahatma Gandhi Sethu is built across the river :
Answer
A. Ganga
8
What is the height of the highest viaduct bridge in Asia which is built in Konkan rail road?
Answer
C. 64 meters
9
Light absorbing organic carbon which causes decoulration of Taj is also known as:
Answer
A. Brown carbon
10
The date on which Malayala Manorama started publication as a weekly :
Answer
C. March 22,1890
11
The place where world’s first bit coin ATM was set-up :
Answer
D. Vancouver
12
The deepest immersed intercontinental tube tunnel rail road is -
Answer
D. Marmaray
13
What do you mean by ‘boat people problem’?
Answer
A. . Refugee problem
14
What is the old name of INS Vikramaditya?
Answer
C. Adm. Gorshghov
15
‘The head office of World Tourism Organisation is situated at :
Answer
C. Madrid c=,
16
The world mothertongue day is observed on :
Answer
B. February 21
17
Who formed the first trade union movement — Travancore Labour Association in Kerala?
Answer
D. PK. Bava
18
The first book written by E.M.S. Namboodirippad is:
Answer
D. Jawaharlal Nehru
19
The name of committee set up in 1995 to study the Prasar Bharathi Act.
Answer
A. Sengupta committee
20
The date on which the Akashavani-Doordarshan DTH service came into being :
Answer
B. 16% December 2004
21
Let A be a 3x 3 matrix with characteristic polynomial p(
Answer
Question Cancelled
22
The maximum value of (xy)⁶ on the ellipse x²/4 + y² = 1 occurs at a point (x, y) for which y² is equal to:
Answer
B. 1/2
23
Which of the following is the Laplace transform of f(t) = {1, 0 ≤ t ≤ 2; t² − 4t + 4, t > 2} ?
Answer
B. (1 − e⁻²ˢ)/s + 2e⁻²ˢ/s³
24
What is the image of |z| < 1 under the tranformation w = (i − z)/(i + z)?
Answer
A. right half plane
25
If ū and v̄ are irrotational vectors which of the following is true?
Answer
C. ū × v̄ is solenoidal
26
When a body of mass moment of inertia J about a given axis is rotated about that axis with
an angular velocity @, then the kinetic energy of rotation is :
Answer
D. 0.5 1a?
27
The resultant of two forces each equal to 2 N and acting at right angles is:
Answer
C. 2√2
28
A ridge formed by the intersection of two sloped surfaces having an exterior angle greater
than 180° is called :
Answer
B. hip
29
If magnetic bearing of sun at noon at a place in southern hemisphere is 150°, then magnetic
| declination at that place is :
Answer
A. 30°E
30
When (H) is the difference in heights between the extremities of a chain length (L), then the correction for slope required is:
Answer
C. H²/2L
31
Anengine of 105 kW capacity requires 10 kW to start the engine. Its mechanical efficiency is :
Answer
B. 91.3%
32
Inthe vapour compression cycle the condition of refrigerant is superheated vapour :
Answer
A. before passing through the condenser
33
Specific speed of a turbine depends upon :
Answer
D. speed, power and head 3
34
Which of the following manufacturing processes be likely to produce the strongest parts?
Answer
C. forging
35
Climb milling is preferred while machining since :
Answer
C. better surface finish can be obtained
36
Two resistors of 80 Q and 120
Answer
C. 116A
37
The unit of magneto motive force is :
Answer
Question Cancelled
38
Three equal impedances are first connected in star across a balanced three phase supply. If
connected in delta across the same supply :
Answer
D. Power consumed will increase three fold
39
The power factor of an alternator is determined by its:
Answer
Question Cancelled
40
A synchronous machine is called doubly excited machine because :
Answer
C. Both its rotor and stator are excited
41
Temperature compensation of a 18 V zener diode can be achieved by connecting it in:
Answer
C. Series with forward biased Si diodes
42
The transformer utilization factor of a full wave rectifier is :
Answer
B. 0.693
43
Identify the wrong statement regarding the Miller capacitance of a CE amplifier :
:
Answer
B. It decreases the input capacitance
44
An AM transmitter has an rms antenna current of 11 A when unmodulated and 13 A when
sinusoidally modulated. The modulation index is :
Answer
D. 0.89
45
Inthe visual display.on the CRT screen, the sweep voltage causes the spot to move about the
screen :
Answer
A. horizontally from left to right at a constant velocity
46
Central Processing Unit is a combination of :
Answer
D. Arithmetic logic and contro! unit
47
Which of the following memories needs refreshing’?
Answer
B. DRAM
48
Recursion is a process in which a function calls : 3
Answer
A. itself
49
What will be the final values of x and y?
void main()
{
int x = 1, y = 1;
clrscr();
do while (x <= 7)
{
x++, y++;
}
while (y <= 5);
printf("\n x = %d y = %d", x, y);
}
Answer
C. x = 8 y = 8
50
What will be the output of the following program?
void main( )
Answer
D. none of the above
062/2016 10 A
51
A zener diode voltage regulator has load requirement of 12 V and 2 Amp. The zener diode's
minimum current requirement is 0.2 A. The minimum voltage at input is 24 Vv, What is
maximum efficiency of circuit? (upto 1 decimal place)?
Answer
A. 45.6%
52
How many op-amps are required to implement this equation? Vₒ = [R₃/(R₁ + R₃)]·[(R₂ + R₄)/R₂]V₁ − (R₄/R₂)V₂
Answer
B. 1
53
An FIR system is described by the system function H(z) = 1 + (7/2)z⁻¹ + (3/2)z⁻². The system is:
Answer
C. mixed phase
54
A radio system outputs signals with frequency components only in the range 2.5 MHz to
3.5 MHz. The analog-to-digital converter that you want to use to digitise such signals can be
operated at sampling frequencies that are an integer multiple of 1 MHz. What is the lowest
sampling frequency (in MHz) that you can use without destroying information through
aliasing? ;
Answer
D. 2
55
Six equal resistances each of 10 ohms are connected to form a network as shown in, diapram.
What are the equivalent resistance between A and B in ohms?
C
BS
Answer
D. 10
56
The circuit below is a regulated power supply, the output voltage is :
+
I let
lVoC
U ulated ‘.
; Regulated
a best be Ditaat
Answer
C. c) 9V
57
The response of an initially relaxed circuit to a signal V, is e u(t). If the signal is changed
to (V, + 2dV, / dt), the response would be :
Answer
C. 4
58
The response of an initially relaxed circuit to a signal Vₛ is e⁻²ᵗu(t). If the signal is changed to (Vₛ + 2dVₛ/dt), the response would be:
Answer
B. 3
59
When a 1 Mhz signal is combined with the output of a 1.3 Mhz oscillator, the beat frequency
obtained will be (in Khz) :
Answer
Question Cancelled
60
In the circuit shown in the figure, the value of capacitor C (in mF) needed to have critically
damped response i(!) is x, then «/2 =:
400 4H C1
To Ya
Answer
C. 8
61
In the circuit shown in the figure, the value of capacitor C (in mF) needed to have critically damped response i(t) is x, then x/2 =
Answer
B. 5
62
The circuit shown below is a digital-to-Analog converter with VR = 10 V and R = 10 k Ohm. The current I (in μA) is
Answer
Question Cancelled
63
The closed loop transfer function of a unity feedback control system whose step response is given by c(t) = k[1 − 1.66e⁻⁸ᵗ sin(6t + 37°)] is 100k/[s² + As + B] then B − A =
Answer
D. 84
64
Two coils 1 and 2 have self and mutual inductances of displacement ‘x’ metres as under: L₁₁ = 2 + 3x, L₂₂ = 4 + 6x, L₁₂ = 2 − 3x. For constant I₁ = 1 A and I₂ = −0.5 A, an electromagnetic force is developed in the direction to increase x. The magnitude of the force is m, then (10m + 1/2):
Answer
C. 38
65
The maximum voltage across capacitor would be (in V) :
0.105 v,
— i |
NY ATA Wn
259 wa 4H
+
3 v() + pe Mo
Answer
Question Cancelled
66
The maximum voltage across capacitor would be (in V):
Answer
Question Cancelled
67
Calculate the value of voltage at time ¢ = 0.31 seconds:
. eilt)
. Rl
ge 452 650 pF
Answer
B. 9.7
68
The system in the fig. has a second order response with a damping ratio of 0.6 and a
frequency of damped oscillations of 10 rad/s. The value of 4K, - K, is:
‘ |
Pa eS
Answer
Question Cancelled
69
A transmitter radiates a total of 10 kW. The carrier is modulated to a depth of 60%. The
power in the carrier will be P (in kW) then 10 p to the nearest integer will be :
Answer
B. 9
70
A transmitter radiates a total of 10 kW. The carrier is modulated to a depth of 60%. The power in the carrier will be P (in kW) then 10P to the nearest integer will be:
Answer
D. 85
71
A uniformly doped silicon epitaxial NPN bipolar transistor is fabricated with a base doping of Nᵦ = 3 × 10¹⁶ cm⁻³ and a heavily doped collector region with N꜀ = 5 × 10¹⁷ cm⁻³. The neutral base width is xᵦ = 0.7 μm when Vᵦ꜀ = Vᵦₑ = 0. The Vᵦ꜀ at punch-through is (in V):
Answer
Question Cancelled
72
Find the drain-source voltage, VDS, for the NMOS transistor circuit shown in fig. The device parameters are: conductance parameter, k = 600 μA/V² and VT = 2 V.
Answer
C. 4.2 V
73
An operational amplifier is a particular type of differential amplifier. Most op-amps receive two input voltage signals and output one voltage signal. Here is a single op-amp, shown under two different conditions (different input voltages). Determine the voltage gain of this op-amp, given the conditions shown.
Answer
A. 530000
74
Twenty-four voice signals are sampled uniformly at a rate of 8 kHz and then time-division
multiplexed. The sampling process uses flat-top samples with 1 us duration. The multiplexing
operating includes provision for synchronization by adding an extra pulse of | us duration. The
spacing between successive pulses of the multiplexed signal is (Give the answer in ns) :
Answer
C. 4000
75
Norton's theorem states that a complex network connected to a load can be replaced with an
equivalent impedance : :
Answer
C. in series with a voltage source
76
Inthe circuit give below, If the “on” resistance of the MOSFET labeled “Q » 18200 2 and the
“on” resistance of the MOSFET labeled “Q,,” is 100 Q, then if 10 mA of current is sourced in
the high state, V,,, is X. If 10 mA of current is sunk in the low state, Vp, is Y, then X+Y=?
BV
F
EI 4
(7 GND
Answer
D. 7V
A 17 062/2016
[P.T.O.]
77
In the circuit given below, if the ‘on’ resistance of the MOSFET labeled Qₚ is 200 Ω and the ‘on’ resistance of the MOSFET labeled Qₙ is 100 Ω, then if 10 mA of current is sourced in the high state, Vₒₕ is X. If 10 mA of current is sunk in the low state, Vₒₗ is Y, then X + Y = ?
Answer
C. 4 V
78
At a frequency of 1 GHz and transmitter-receiver distance of 30 mi, which is the most
efficient device for energy transfer :
Answer
C. Antennas
79
Non-coherently detection is not possible for :
Answer
C. FSK
80
_ 81. An increase in the base recombination of a BJT will increase :
Answer
A. the common emitter dc current gain #
81
If the correct statements out of the ones given below are given a binary 1 and incorrect ones
are assigned a 0, then the 2's compliment of the 6 bit binary number (consider first
statement’s assignment as least significant bit) is :
. (i) Statistical independence implies negative covariance
(ii) Group 3 MH fax code uses a form of arithmetic coding
(iii) Steven's law states that rational scalea follow a logarithmic law
(iv) The Karhunen-Lo eve transform is commonly approximated by the z-transform
(v) 40dB corresponds to an 80x increase in voltage.
(vi) The human ear has about 480 critical bands
Answer
B. 000000
82
Two sequences x,
Answer
Question Cancelled
83
The dominant mode for waveguide operation 15 :
Answer
B. TE,,
84
The dominant mode for waveguide operation is :
Answer
A. TE₁₀
85
A telephone exchange has 9000 subscribers. If the number of calls originating at peak time is 10,000 in one hour, the calling rate is :
Answer
B. 10/9
86
In CMOS technology, shallow P-well or N-well regions can be formed using :
Answer
D. low energy ion-implantation
87
In the following circuit employing pass transistor logic, all NMOS transistors are identical with a threshold voltage of 1 V. Ignoring the body-effect, if the output voltages at P, Q and R are p, q and r then p + q − r = ?
Answer
B. 4
88
Ridged waveguides are advantageous over rectangular waveguides in their :
Answer
D. Ability to work at lower frequency
89
A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine
waves. Which of the following frequency is least likely to be present in the output?
Answer
D. 998.0 kHz ams
90
A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine waves. Which of the following frequency is least likely to be present in the output?
Answer
B. 1000 kHz
91
Calculate the relation for Vₒ/Vᵢ for this network. Write the answer up to 4 decimal places. Given L = 1 mH, R₁ = 1 kΩ, R₂ = 2 kΩ, C = 1 nF, W = 1 MHz:
Answer
Question Cancelled
92
In the following circuit s₀, s₁ and External Clock are the inputs to the circuit, with External clock, s₀, and s₁ as square pulses of time periods having a ratio of 1 : 2 : 4. Taking time period of the External clock as 1 s, find Qₒᵤₜ at t = 2 s, 4 s, 6 s, 8 s and 10 s. Give your answer as Qₒᵤₜ for the specified time in the order given without spaces. (Assume Qₒᵤₜ, s₀, s₁, External clock = 0 at t = 0):
Answer
Question Cancelled
93
The FT of a rectangular pulse existing between t = −T/2 to t = T/2 is a :
Answer
B. sinc function
94
When the length of antenna is a whole wavelength :
Answer
A. the radiation at right angles is zero
95
Consider the following statements : 1. The amplitude of an FM wave is constant. 2. FM is more immune to noise than AM. 3. FM broadcasts operate in upper VHF and UHF frequency ranges. 4. FM transmitting and receiving equipments are simpler as compared to AM transmitting and receiving equipments. Which of the above are correct?
Answer
B. 1, 2, 3
96
FM transmitting and receiving equipments are simpler as compared to AM
transmitting and receiving equipments
Which of the above are correct?
Answer
Question Cancelled
97
Find the frequency at the point z in Hz:
Jt | 10-Bit “| 4-Bit Parallel | * Mod-25 + | 4-BitJohnson | 7
| 160 kHZ Ring Counter Counter Ripple Counter Counter
Answer
C. 5
98
The Fourier transform of the exponential signal eo is:
Answer
C. animpulse
99
Assertion (A) : The maximum range of a radar is proportional to fourth root of the peak
transmitted pulse power.
Reason (R) : Radar signals are subjected twice to inverse square law.
Answer
A. Both
100
Assertion (A) : Free space does not interfere with normal radiation and propagation of radio
waves.
Reason (R) : Free space has no magnetic or gravitational fields.
Answer
A. . Both
Discussion
Ask a doubt or share a tip.
No comments yet — start the discussion.