MPPSC AE 2022: State Engineering Service Examination, Electrical Engineering
Text of page 3
SECTION—A
General Studies
1. What would you use for immediate 6. Which of the following is an
real time communication with a example of guided media in
friend? communication?
[A] E-mail [A] USB-waves
[B] IRC [B] Radio waves
[C] Usenet [C] Infrared
[D] Instant messaging [D] Fibre optic cable
7. Government of India has launched
2. Which of the following is not an NMEICT project for which sector?
E-commerce activity?
[A] Administration sector
[A] B2B
[B] Finance sector
[B] C2B [C] Education sector
[C] B2A [D] Conservation sector
[D] None of the above
8. Which of the following bus provides
Tlug and play' mode of operation
3. In Turing test, the number of to computer user?
participants is
[A] PCI
[A] one
[B] SCSI
[B] three [C] USB
[C] four [D] INT
[D] None of the above
9. The method used in Artificial
Intelligence, for determining
4. Fuzzy logic has been very whether a computer is capable of
successful in application. thinking like a human being or not,
[A] washing machine is called
[B] air conditioner [A] Alpha Test
[C] dishwasher [B] A* Algorithm
[D] All of the above [C] Turing Test
[D] Beta Test
5. Which of the following symbols and
10. Which technique is used to convert
rules are used in FOPL?
an analog signal to digital signal?
[A] Predicate [A] Quantization
[B] Logic Quantifiers [B] Pulse Code Modulation
[C] Both [A] and [B] [C] B8ZS
[D] None of the above [D] HDB3
6-A fP.T.O.
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B^
11. Which of the following inscriptions 15. Name the Greek ambassador who
gives an account of a guild of established the Garuda Pillar at
weavers? Besnagar.
[A] Prayag Prashasti of [A] Megasthenes
Samudragupta [B] Heliodorus
[B] Sanchi inscription of [C] Arrian
Chandragupta II
[D] Menander
[C] Mandsaur inscription of
Kumaragupta 16. Who was the author of
Viddhasalabhanjika?
[D] Bhitari inscription of
Skandagupta [A] Bilhana
[B] Somadeva
12. Ancient name Maikal denotes
which of the following areas? [C] Bhasa
[D] Rajashekhara
[A] Amarkantak
[B] Ujjain 17. Who is the author of Ram Rasayan?
[C] Malwa [A] Padmakar
[D] Bundelkhand [B] Ishuri
[C] Rajashekhara
13. Which Chandela king died by [D] Bilhana
abandoning his body at the
confluence of Prayag?
18. Bagheli is closer to which dialect
[A] Harsha of Uttar Pradesh?
[A] Bhojpuri
[B] Yashovarman
[B] Avadhi
[C] Dhanga
[C] Khadi Hindi
[D] Vidyadhara
[D] Braj
14. Who established Sarada Sadan in
19. Who is accredited as the folk deity
Dhar?
at Bundelkhand?
[A] King Bhoja [A] Pabuji Rathore
[B] Vidyadhara [B] Lala Hardaul
[C] Vakpati Munja [C] Veer Lorik
[D] Sindhuraja [D] Gogaji
6-A P.T.O.
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20. Who was the builder of the 23. Which of the following statements
Khajuraho group of temple? is incorrect regarding the climate
of Madhya Pradesh?
[A] Pala
[A] In winter, the mean minimum
[B] Pratihara temperature is 10 ®C and the
mean maximum temperature
[C] Chandela
is 25 "C
[D] Paramara
[B] Average rainfall is less than
200 mm
21. Which of the following regions of
Madhya Pradesh are densely [C] The heaviest rainfall is in the
forested? south-eastern part and
gradually decreases in north
[A] Dudwara - Narsinghpur - west
Haveli
[D] None of the above
[B] Gird - Gwalior
[C] Satpura - Maikal area
24. Which of the following energy
[D] None of the above resources is found abundantly in
Johila, Sohagpur, Pench, Kanhan
and Singrauli?
22. Which of the following statements
represents the correct location of [A] Iron ore
the Msilwa Plateau?
[B] Mineral oil
(a) It lies on the western part of
central highland.
[C] Natural gas
{b} It lies between Betwa and
Johilla valley. [D] Coal
(c) It lies to the east of
Bundelkhand highland. 25. The most important manganese
producing belt lies in which of the
(d) It lies to the north of river following district regions?
Narmada.
[A] Sheopur, Morena, Shivpuri
[A] (a)and (d)
[B] Balaghat, Chhindwara, Jhabua
[B] fdjandfcj
[C] (b)and (d) [C] Sidhi, Katni, Mandsaur
[D] (c) and (b) [D] Gwalior, Khandwa, Bhopal
6-A [ P.T.O.
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26. Study the following statements. 29. What is the major source of
(a) It is a multipurpose project of irrigation in Madhya Pradesh?
Madhya Pradesh and Uttar [A] River
Pradesh.
[B] Canal
(b) The dam is constructed on
[C] Well and Tubewell
Betwa river on the boundary
of Ashoknagar and Lalitpur. [D] Pond
(c) The height of the dam is
43-80 meters and length is 30. What is the main cause of low
562-50 meters.
temperature in Pachmarhi?
Which of the following irrigation
[A] Height and vegetation
projects represents the above
statements? [B] Low population and rain
[A] Harsi [C] Vegetation and rivers
[D] Rivers and waterfalls
[B] Rajghat
[C] Gandhi Sagar 31. Who among the following was not
[D] Bansagar the Governor of Madhya Pradesh?
[A] Lalji Tandon
27. Diamond, which is found, in [B] Kunwar Mahmood Ali Khan
Chhatarpur district is located in
[C] Kailash Nath Katju
which of the following development
blocks? [D] Sarla Grewal
[A] Bunder
32. Who among the following was the
[B] Picchore Chief Minister of Madhya Pradesh?
[C] Pipariya [A] Satyanarayan Singh
[D] None of the above [B] Ram Naresh Yadav
[C] Bhagwat Dayal Sharma
28. In which year did the Madhya [D] Sunder Lai Patwa
Pradesh Government constitute a
separate department of new and
33. The Panchayati Raj system in
renewable energy?
Madhya Pradesh is
[A] April, 2008
[A] one tier
[B] April, 2009 [B] two tier
[C] April, 2010 [C] three tier
[D] April, 2011 [D] None of the above
6-A [P.T.O.
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34. In which district of Madhya 38. In which district of Madhya
Pradesh is Bhagoria festival Pradesh is Ordnance Factory,
celebrated? Khamaria situated?
[A] Jhabua [A] Indore
[B] Bhopal [B] Bhopal
[C] Dewas [C] Jabalpur
[D] Ujjain [D] Sagar
35. According to 2011 census, which 39. 'Souda-Patrak Mobile App'launched
is the district with the lowest by Government of Madhya Pradesh,
population density in Madhya is related to which of the following?
Pradesh?
[A] Agricultural sector
[A] Dindori
[B] Industrial sector
[B] Harda
[C] Educational sector
[C] Mandla
[D] None of the above
[D] Alirajpur
40. The product of Indore district in
36. According to 2011 census, which
Madhya Pradesh under 'One
is the least populous district of
District One Product'(ODOP) is
Madhya Pradesh?
[A] bamboo
[A] Dindori
[B] onion
[B] Harda
[C] garlic
[C] Jabalpur
[DJ Dewas [D] potato
37. Where is Sant Shiromani Ravidas
41. Who among the following attended
Global Skills Park located in
the Republic Day of India as the
Madhya Pradesh? chief guest in the year 2023?
[A] Bhopal [A] Abdel Fattah el-Sisi
[B] Shajapur [B] Justin Trudeau
[C] Chhindwara [C] Joe Biden
[D] Narsinghpur [D] Rishi Sunak
6-A 11 [P.T.O.
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42. Which Kalvari class submarine, 47. Which of the following is not a
built under the P-75 project, was UNESCO world heritage site of
inducted into the Indian Navy in Madhya Pradesh?
January, 2023? [A] Khajuraho group of
[A] INS Kalvari monuments
[B] INS Damini [B] Rock shelters of Bhimbetka
[C] INS Khanderi [0] Buddhist monuments at
[D] INS Vagir Sanchi
[D] Udayagiri caves of Vidisha
43. In which State was the 36th
National Games organised? 48. Which of the following sports has
[A] Gujarat been declared as the State sport
[B] Uttar Pradesh of Madhya Pradesh?
[C] Jharkhand [A] Table Tennis
[D] Kerala [B] Football
[C] Mallakhamb
44. In February 2023, 'Rashtriya
[D] Badminton
Sanskriti Mahotsav 2023' was-
organized in
49. Which of the following is the
[A] Bhopal scheme of Madhya Pradesh
[B] Bhubaneswar Government for improving the
health and education status of the
[C] Bengaluru
girls?
[D] Mumbai
[A] Beti Bachao Beti Padhao
45. Where in Madhya Pradesh, is the Abhiyan
country's first Geological Park [B] Ladli Laxmi Yojana
being set up?
[C] Gaon ki Beti Yojana
[A] Lamheta Village
[D] Balika Shiksha and Health
[B] Tamot Protsahan Yojana
[C] Nagaud
50. What is the upper limit of the
[D] Hathnora
subsidy given to the farmers under
Khet-Talab Yojana of the Madhya
46. Where was the 17th Pravasi
Pradesh Government?
Bharatiya Divas organized?
[A] Indore [A] ^32,000
[B] Bhopal [B] f=21,350
[C] Mumbai [C] ^16,350
[D] Lucknow [D] None of the above
6-A 13 [P.T.O.
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-^ / SECTION—B
/ Electrical Engineering
51. An ideal transformer has 200 54. Three-phase induction machine
primary and 800 secondary operates at low speed (crawling
winding turns. The primary winding phenomenon) due to
is connected to a 200 V, 50 Hz
single-phase supply. The secondary
[A] 5th space harmonics
winding supplies a load of 5 A at
O'S lagging power factor.
Determine (i) the primary current, [B] 7th time harmonics of voltage
(ii) the power consumed by load and wave
(iii) the maximum flux in the core.
[C] 7th space harmonics of air gap
[A] 20 amp, 3200 watts, 4-5 mWb field
[B] 5 amp, 3600 watts, 0*45 mWb
[D] unbalanced supply voltage
[C] 20 amp, 3600 watts, 0-45 mWb
[D] 5 amp, 3200 watts, 0-045 mAAHD 55. According to V and inverted V curve
of the synchronous motor, which
relation is right for synchronous
52. A delta zig-zag, three-phase motor operating at lagging
transformer can be designated as power factor? [Neglect armature
resistance (rjj
[A] DZq
Where : terminal voltage
[B] DZii
[C] DZj
Bj- : Excitation voltage
[D] DZg 6 : Torque angle
53. The commutator segments of DC [A] By cos5 > Vf
machine are made up of
[A] brass [B] EyCos6<V(
[B] copper
[C] jE^cos5 = V(
[C] hard drawn copper
[D] aluminium [D] V^cosb = Bf
6-A 14
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op]
56. Electromagnetic torques in a 59. What should be the speed range of
synchronous generator and a Vff controlled induction motor drive
synchronous motor are respectively system? [W^ is the base speed]
[A] independent from the direction [A] 0 to
of rotation for both generator
and motor [B] W^to3W^
[B] in the direction of rotation for [C] 1-5 to 2
both generator and motor
[D] W^to2W^
[C] in opposite direction of rotation
for both generator and motor 60. A differential relay measures the
vector difference between
[D] in opposite direction of rotation
for generator and in same [A] two currents
direction of rotation for motor
[B] two voltages
[C] two or more similar quantities
57. A stepper motor with 20® step angle
is given 68 steps clockwise (cw) and [D] frequencies
18 steps counter clockwise (ccw).
Calculate the final position of the
61. A single-phase induction motor
rotor. [Assume motor start at 0®]
extracts 10 A current from 200 V
supply at 0-8 lagging power factor.
[A] 60® ahead
What are the apparent power and
useful power consumed respectively?
[B] 280® ahead
[A] 2000 VA and 1200 W
[C] 210® behind
[B] 2000 Wand 1200 W
[D] 120° behind
[C] 2000 Wand 1600 W
[D] 2000 VA and 1600 W
58. Hysteresis loss and eddy current
loss are used in which type of
heating? 62. A relay used in backup protection is
always than the main protection
[A] Dielectric heating relay.
[A] more sensitive
[B] Induction heating of steel
[B] faster
[C] Resistance heating [C] slower
[D] Induction heating of brass [D] accurate
6-A 15 [P.T.O.
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63. Voltage regulation of a transmission 66. Effect of capacitance is neglected
line is defined as in
[A] the ratio of no load minus full [A] short transmission line
load receiving end voltage to no
load sending voltage [B] medium transmission line
[B] the ratio of full load receiving
[C] long transmission line
end voltage minus full load
sending end voltage to full load [D] None of the above
sending end voltage
[C] the ratio of no load receiving 67. Choose the correct sentence
end voltage minus full load related to power transfer.
receiving voltage to full load
receiving end voltage [A] Active power transfer depends
[D] the ratio of no load receiving on load angle 5
end voltage minus no load
sending end voltage to full load [B] Reactive power transfer
receiving end voltage depends on load angle 5
[C] Active power depends on line
64. The bus voltage magnitude in a voltage drop
power system can be effectively
controlled by controlling the [D] None of the above
[A] phase angle of that bus
[B] amount of reactive power 68. In which HVDC transmission
injected into that bus system, ground is used as return
path?
[C] amount of active power injected
into that bus
[A] Only in monopolar link
[D] phase angle and active power
at that bus
[B] Only in bipolar link
65. The sending end bus is connected [0] Only in homopolar link
to receiving end bus of a lossless
transmission line through a series [D] Both in monopolar and
reactance of jlO ohms. The line to homopolar links
line voltage is 115 kV r.m.s. The
maximum real power that can be 69. Which component cannot be used
transferred by this three-phase as VAR generator?
system is
[A] Synchronous machine
[A] 66-54 MW
[B] Capacitor
[B] 345 MW
[C] 1889 MW [C] Transformer
[D] 1322 MW [D] Cable
6-A 16
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70. Applying Kirchhoffs law to different 73. Double-energy transients are
loops in the figure given below, find produced in circuits consisting of
the values of Vj and Vq.
[A] two or more resistors
4-3QV_ ^ ^-15 V
[B] resistance and inductance
+ + +
10 V
[C] resistance and capacitance
V.
[D] resistance, inductance and
capacitance
5V
[A] = 10 V, 1^2 = 1-5 V 74. In the series resonant circuit
shown in the figure given below,
[B] = -15 V, V2 = 0 V the values of the voltage and
current are respectively 100 sin
[C] = -10 V, ^2 = -1-5 V (300t+ 30®) volts and 10 sin
(300t+30®) ampere. Find the
[D] 15 V, V2=-1-5V values of R and C.
71. A given function f{t) can be
represented by a Fourier series, if R IH
[A] it is periodic 100 sin(300f + 30")(5 ic
[B] it is single-valued 10 sin(300f + 30*
[C] it has a finite number of maxima
and rninima in any one period
[D] All of the above
[A] i?= 10 a, C= 11-11 pF
72. Which of the following periodic
functions possesses even symmetry? [B] J? = 10^ c = 0-33 X 10-2
[A] cos3f
[B] sint [C] J?= 0-1 JQ, C = 9x 104
[CJ tcosSOt
[D] R= 110 a, C= 300 pF
[D] {t+ t^+ t^)
6-A 17 [ P.T.O.
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75. The Z parameters of the two-port 77. Using mesh analysis, find the
network (r-parameter equivalent current flow through the 50 V
circuit of common base transistor) source in the network shown below.
shown below are
R.
o-R^h 10 V
©V.
T
[A] ^11 ^21 ^-^3 ^2 [A] 4 A
^12 ~ ^22" [B] 5-481 A
[B] Zii = Ri-R^ [C] 3-3 A
■'^S
i
^21 ^
[D] -2-5 A
^12 ^ ^22 ^ II
^
78. A coil having an inductance and
[C] ^11 ^ -^1 ^21 ^ *^^3 ^ resistance of 50 mH and lOX^ is
connected in series with a
^12 ^ -^3 ^22 ~ ■'^2 ^3
capacitor and a 100 V, 1 kHz source.
[D] ^11 " Obtain the value of capacitance
that will cause a resonance in the
^12 ^ ~^3 ^22 ^^3 ^2 circuit and also find the circuit
current of resonance frequency.
76. Obtain the value ofIin the figure [A] 0-5 ^iF and 1 A
given below, if /^ = 3 A, ^ = -2 A in [B] 0-05 \xF and 0-1 A
the dependent current sources.
[C] 0-25 \iF and 1-1 A
[D] 0-35 ^lF and 1 A
79. A linear connected graph has n
nodes and b branches. The number
of link (co-tree branches) in the
graph would always be equal to
[A] 30 A
[A] h-n
[B] ISA
[B] n-1
IC] 21 A [C] b-n~ 1
[D] 9 A [D] h-n+ 1
6-A 18
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Bp
80. Which one of the following is not a 83. The electric field component of an
source of magnetostatic field? electromagnetic wave in free space
is
[A] A charge disc rotating at £ = 10cos(10'^t+ fcz)ay V/m
uniform speed where t is in second, z is in metre.
It can be inferred that
[B] A permanent magnet
(i) the wave propagates along +y
direction.
[C] A DC current flowing in a wire
[D] An accelerating charge (ii) the wave amplitude is 10 V/m.
(iii) the wave number k = 0-33 rad/m.
81. Which of the following statements
is not a characteristic of a static (iv) the wavelength X = 188-5 m.
magnetic field?
Which of the following pairs is
[A] It is solenoidal correct?
[B] It has no sinks or sources [A] (i) and (ii)
[C] It is conservative
[B] (ii) and(iv}
[D] Magnetic flux lines are always
[C] (ii) and (iii)
closed
[D] (ii), (iu) and (iv)
82. In cylindrical coordinates, the
equation
84. What is the major factor for
determining whether a medium is
ar P dz^ lossy dielectric, lossless dielectric
is called or good conductor?
[A] Maxwell's equation [A] Reflection coefficient
[B] Laplace's equation [B] Loss tangent
[C] Poisson's equation [C] Constitutive parameters
[D] Helmholtz's equation [D] Attenuation constant
6-A 19 [P.T.O.
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For a silicon p-n junction at 300 K 88. According to Meissner effect
with doping concentration of
10^® cm"^ and N^ = 10^^ cm"^,
consider the built-in potential [A] the magnetic field lines will
barrier at 0-635 V and permittivity penetrate the sample
of semiconductor as 11-7. The space
charge width of the p-n junction is
[A] 0-95 iim [B] a superconductor below its
critical temperature expels all
[B] 0-095 ]im
the magnetic field from the
[C] 0-452 ]xm bulk of the sample
[D] 1-95 ]xm
[C] the sample becomes diamagnetic
86. Consider the interface between a substance
GaAs semiconductor and air. Let
the refractive index of GaAs is 3*66.
The approximate values of
[D] the superconductor develops a
reflection coefficient and critical
magnetization by developing
angle at semiconductor-air
surface current
interface will be
[A] 0-33 and 30°
[B] 0-33 and 16°
89. An electric dipole moment is a
[C] 0-033 and 16° measure of
[D] 0-33 and 25°
[A] electrostatic effects of a pair
87. The factors reducing the efficiency of opposite charges separated
of Si solar cell are
by a finite distance
[A] absorbed photons with hv < Eg
and short wavelength photons
absorbed near the surface [B] electrostatic effects of a pair
of same charges separated by
[B] unabsorbed photons with hv < Eg a finite distance
and short wavelength photons
absorbed near the surface
[C] unabsorbed photons with hv > Eg [C] magnetostatic effects of a pair
and short wavelength photons of opposite charges separated
absorbed near the surface by a finite distance
[D] absorbed photons with hv > E
9
and short wavelength photons
unabsorbed near the surface [DJ None of the above
6-A 20
Text of page 21
90. The rectifier employs negative 93. For measurement of parallel-
feedback in electronic voltmeters. connected inductance (L^), the circuit
This is done is generally resonated using
[A] to improve stability [A] Kelvin clips
[B] a dummy inductor
[B] to overcome non-linearity of
diodes [C] a reference inductor or work coil
[D] a variable capacitor
[C] to increase the overall gain
[D] None of the above 94. Sensitivity of the AC-bridge can be
improved by
91. Which statement is/are correct [A] increasing the level of the supply
regarding the probable error? voltage
[B] using a more-sensitive null
[A] It is determined by taking the detector
arithmetic means of the
multiple value or measurement [C] Both [A] and [B]
obtained
[D] None of the above
[B] It is the maximum error which
95. In RTD, the platinum is the most
might have occurred during the
widely applicable resistance wire
measurement
used because
[C] Both [A] and [B] [A] of its high stability and large
operating range
[D] None of the above
[B] of its high sensitivity
[C] it requires no point sensing
92. A problem occurs with the
measurement of very high resistance [D] All of the above
because there are two resistive
components which are 96. Which of the following are the
characteristics of the data acquisition
[A] volume and surface leakage systems?
resistance
[A] Settling time and data transfer
rate/speed
[B] dummy and surface leakage
resistance [B] Resolution and non-linearity
[C] Resolution, non-linearity and
[C] dummy and volume resistance
settling time
[D] None of the above [D] All of the above
6-A 21 [P.T.O.
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97. If the signals of frequencies 100. Calculate the output voltage using
are to be displayed, then post the given circuit for resistor
deflection acceleration is components Rj-~ 470 kfl, = 4-3 k£^,
necessary to increase the = 33 kn, R3 = 33 kn for an input
brightness of the trace. of 80 M.V.
[A] more than 10 MHz
rAAA-j
^3
[B] less than 11 MHz \ " 1
[C] more than 1 MHz
[D] equal to 2 MHz [A] 1-40 volts
[B] 1-78 volts
98. Radiation p3nrometers are generally [C] 500 volts
used for a temperature range of
[D] 2-59 volts
[A] 0°C-500°C
101. Find input current and output
voltage for an inverting amplifier,
[B] 1200 3500
which has = 10 kfl, R^= 150 kfl
and input voltage = 1 V.
[C] 250 "C-1000
[A] 1^ = 7^ mA, V;,=-10V
[D] -20''C-100'^C [B] 1^ = 9-^ mA, V„ = 15 V
[C] ^„=10-2mA, V„ = 7V
99. The controlling torque of an
electrical measuring instrument is
[D] 10^ mA, V'„ =-15 V
proportional to
102. In a volt-ampere characteristics,
[A] 02 for a p-n junction diode, the current
I is related to the voltage V by the
equation
[B]
8
[A] /= 7o(e^/"^^-l)
[B] I^nqV
[c] Ve
[D1 0 [D] I =
6-A 22
Text of page 23
Bp]
103. In a full wave rectifier, DC load 106. The circuit diagram shown in the
current is figure below performs the logic
function of which gate?
[Al
[B] lDC=f
[C] ^DC- —
rri I
[A] OR
[D] he - _
V2
[B] AND
104. Stability factor (S) is defined as
[C] NOR
[A] S =^
^CD [D] Ex-OR
AIe
[B] S =
AI,CO 107. Convert the following function into
canonical product of sum form,
where
[C] S =
^co F(A,B,C)= n(0,l,2,5)
AIq
[D] s = [A] [A +B + C]{A +B + C]
AI.CO
{A + B+ C]{A + B + C)
105. Simplify the Boolean expression of
the given identity [B] [A +B+ C][A +B + C]
{A + C]{A + B]{A + B) {A + B+ C){A +B+ C)
[A] AB
[C] (A + B + C)(A +B + C)
[B] AC (A +B+ C)(A + B + C)
[C] AB
[D] (a + B + C)(A +B + C)
[DI BC {A + B+ C)[A + B + C)
6-A 23 [P.T.O.
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Bp]
108. The given truth table is for 110. Power diode is a two-terminal p-n
junction device. Under reverse
Input Output biased conditions, a small reverse
current known as leakage current
CLK FF i/p Q increases slowly in magnitude with
the reverse bias voltage until the
0 X No change is reached.
1 X No change [A] threshold voltage
T X No change [B] avalanche or Zener voltage
X 0 No change [C] turn on voltage
i 0 No change [D] cut-in voltage
i 1 Toggles
111. BJTs or MOSFETs, SITs or IGBTs
[A] TFF, positive edge triggered FF
can be assumed as ideal switches
[B] TFF, negative edge triggered FF to explain the techniques.
[C] DFF, edge triggered FF [A] voltage conversion
[D] JKFF, positive edge triggered [B] current conversion
FF
[C] power conversion
109. Given diagram represents [D] frequency conversion
interfacing of TTL gate with
112. Which one of the following is
defined as a bistable semiconductor
component with at least three
junctions that can be changed over
from an off-state into an on-state
input
or vice versa?
[A] Diode
[A] relay
[B] Transistor
[B] motor
[CJ solenoid [C] Uni-Junction Transistor (UJT)
[D] piezo buzzer [D] Thyristor
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113. A TRIAC can be conducted in both 116. During tum-on, the IGBT behaves
directions and is normally used in like a and during tum-nfF. the
AC phase control. It can be IGBT behaves like a
considered as two connected
in antiparallel. [A] MOSFET, BJT
[B] BJT, MOSFET
[A] transistors
[C] BJT, diode
[B] diodes [D] MOSFET, diode
[C] DIACs 117. What is the preferable device to
obtain controlled output voltages
[D] SCRs instead of diodes?
[A] Power controlled thyristor
114. A Gate-Turn-Off Thyristor (GTO) [B] Current controlled thyristor
like a/an can be turned on
by applying a positive gate signal. [C] Voltage controlled thyristor
However it can be turned off by a
negative gate signal. [D] Phase controlled thyristor
[A] DIAC 118. Which one of the following electronic
circuits converts a DC voltage source
to an AC voltage source of specified
[B] SCR
magnitude and frequency?
[C] TRIAC [A] Chopper
[B] Inverter
[D] IGBT
[C] Converter
[D] Rectifier
115. Which of the following are voltage-
controlled devices?
119. What is the another name of DC-DC
converters, which is useful for a
[A] BJT and MOSFET
high power applications?
[B] BJT and IGBT [A] Sensors
[B] Controllers
[C] MOSFET and IGBT
[C] Choppers
■ [D] MOSFET and diode [D] Actuators
6-A 25 [P.T.O.
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Bp]
120. Determine the odd part of the 121. Check whether the following
following signal x(t). systems are time variant or time
invariant :
x(t) (i) =
(ii) y2(t]= tX2[t)
[A] systems (i) and (ii) both are time
1 2 variant
[B] system (i) is time variant but
(ii) is time invariant
0-5
[C] system (i) is time invariant but
-2 -i 0 1 2 (ii) is time variant
[D] systems (i) and (ii) both are time
invariant
0-5 122. Find the transfer function of the
LTI system given in the difference
-2 -1
[B] 0 1 2 equation
-0-5
y(n)-0-5y(n-l)= Jc(n)+ 0-4;c{n-l)
l +0-4z"
[A] H(2)=
l+ 0-5z"
1^1 _9 _i l+0-4z'
[B] H{z)=
1-0-52"
1-0-52"
[C] H{z]=
1 +0-42"
+1
1 2
[D] -2 -1 0
1+ 0-52"
-1 [D] H{z]=
l-0-4z"
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Bp]
123. Find the Laplace transform and 125. If input x(n)= u(n)- i/(n -3)
ROC of the following signal and impulse response
/i(n)= 35(n —l)+ 25(n), then output
8 y{n) by circular convolution is
[A] -"^2 ROC is all points
after the line o = -4
[A] y(n)=[5,3,2,5]
8
[B] -^(s)- ^2 2 g » ROC is all points T
in the s-plane in between the
lines passing through o = -4 [B] i/(n)=[3,2,5,5]
and a = 4 t
[C] . - -^2-8 ROC is all points
[C] y(n)= 12,3,5,5]
after the line a = +4 T
[D] None of the above
[D] i/(n)=[2,5,5,3]
T
124. Which of the following functions
presents the Discrete Fourier
Transform (DPT) of sequence
126. Number of complex additions in a
512-point radix-2 FFT is
T
/» V = l1 + 2cos|
[A] x(/c) O (
[A] 2,61,632
I 3
A: = 0,l,..-,Ar-l
^ . r2nk
[B] Jc(/c)= l+2sm|
13 r [B] 2,62,144
„, 1 ^ (2nk
[C] x(/c)=l-2cos
I 3
k = OX->N-l [C] 4608
'2%k^
[D] ^(/c)= l-2sin
K 3 y
/c = 0,l,...,JV-l [D] 2304
6-A 27 P.T.O.
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Bp]
127. Find the z-transform of input signal 128. Find the impulse response h{n) of
x(n)= {-2,0,1,-1,3} and impulse the factor of 2-interpolator
response h(n)= {1,2,0,-1}. Also find yln)= Xu(n)+i(x^Iri -1]+ [n +1])
its output y{n).
where Xy(n)= 5(n)
[A] X(z)=-2z"^+z"^-z"^+3z"'^
[A] h(n)= {0-5,l,0-5},~l<n<l
H(z)= l +2z"^+z"^ [B] h[n)={-0-5,l,-0-5},-l<n<l
[C] h(n)={-0-5,0,0-5},-l<n^l
Y(z]= 2-4z"^ + z~^ + 3z"^ +
[D] h(n)={-0-5,1,0-5},-l<n<l
z^ +5z~^ +z"® -3z~^
129. In the equation the units
[B] X(z)= -2+z"^-z"^+3z"^ of fn . and Tare respectivelv.
H(z)= l +2z"^-z"^ [A] radians per second, radians
per sample and seconds
7(2)= -2-4z"^ + z"^ + 3z"^ + [B] radians per cycle, radians per
sample and seconds
z~^ +5z~^ +z~^ -3z~'^
[C] radians per sample, radians
[C] X(z)=-2z~^+z"^+ z~^+3z~'^ per sample and seconds
[D] radians per cycle, radians per
H(z)= lz"^+2z"^-z"^ second and seconds
7(z)= 2+ 4z"^ + z"^ + 3z"^ + 130. For a unity feedback control system
with forward path gain
z^ + 5z"^ +z~^ -3z~'^ 25
G(s)=
^' s(s+10)
[D] X(z)= -2-z"^+z"^+3z"'^ the peak time is
[A] 0-75 second
H(z)= l-2z"^-z"^
[B] 0 second
7(z)= -2-4z~^ +z"^ + 3z"^ + [C] 0-25 second
z~^ +5z~^ +z~^ +3z~^ [D] infinite second
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131. For a unity feedback control system 134. The Nyquist plot of an open-loop
with open-loop transfer function transfer function G(j©)H(ja)) of a
system encloses the (-l,jO) point.
G(s)= The gain margin of the system is
s(s + l)(s+ 2)(s + 4)
the system becomes marginally [A] zero
stable for which one of the under
[B] infinite
mentioned value of k?
[A] 1-47 [C] greater than zero
IB] 147-0 [D] less than zero
[C] 1-047
[D] 14-7 135. Without affecting steady state
error, the maximum overshoot can
132. For the linear time invariant system, be decreased by incorporating
the transfer function of the system
[A] proportional error control
is the Laplace transform of the
[A] impulse response assuming all [B] derivative error control
the initial conditions to be zero
[C] on-off control
[B] unit step response assuming
all the initial conditions to be [D] integral error control
zero
[C] unit ramp response assuming 136. For a second order system, natural
all the initial conditions to be frequency of oscillation is 10 rad/sec
zero
and damping ratio is 0-1. What is
[D] unit parabolic response 2% settling time?
assuming all the initial
conditions to be zero
[A] 0-2 sec
[B] 1 sec
133. Consider a system whose signal
flow graph is shown below : [C] 2 sec
[D] 4 sec
1/s X, 1
137. To increase the damping of a
heavily underdamped system
without affecting steady state
response, the compensator used is
The above system is
[A] controllable only [A] phase lag
[B] observable only [B] phase lead
[C] controllable and observable
[C] phase lag-lead
[D] controllable with step input
and observable with ramp input [D] phase lag-lag
6-A 29 [P.T.O.
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138. The second order control system 141. Time delay of a looping program in
exhibits 100% overshoot. Its 8085 microprocessor based system
damping coefficient is is dependent on
[A] less than 1
[A] the number of T-states in the
[B] greater than 1 delay loop
[C] 0
[B] the clock frequency of the
[D] 1 processor
139. For the signal flow graph given [C] the number of times the loop
below, the closed loop transfer is repeated
C[s) .
fanction is
[D] All of the above
142. The arithmetic and logic instructions
i^(s o—> ^C(s) in 8085 without ending with letter
T' are byte instructions.
[A] one
[B] two
[A] 23
29 [C] three
PI
[D] four
44
[C]
29 143. The 'NOP' instruction in 8085
PI microprocessor falls under type
of instruction.
140. In 8085 microprocessor, flag
is not available for the use of the
[A] data transfer
programmer.
[A] zero [B] machine control
[B] carry
[C] logical
[C] auxiliary carry
[D] sign [D] arithmetic
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144. If clock frequency of an 8085 148. The machine cycle Mj of the
microprocessor based system is interrupt acknowledge is identical
2 MHz, then what is the time to with the opcode fetch cycle in 8085
execute MVI instruction? (MVI with exception that
instruction requires 7 clock
periods)
[A] the INTA signal is sent out
[A] 1-5 \iQ instead of RD signal
[B] 2-5 \is
[C] 3-5 us [B] the status lines 10/M, Sq and
are 1,1,1 instead of 0,1,1
[D] Cannot be stated
[C] Both [A] and [B]
145. The status and control signals
during interrupt acknowledgement
machine cycles are [D] the RD signal is sent out
[A] 10/M=0;Si = l;So=l instead of INTA signal
[B] 10/M = l;Si=0;So=0
[C] 10/M = l;Si=l;So=0 149. In memory mapped I/O,
[D] 10/M = l;Si=l;So=l operation(s) can be directly
performed with 1/0 data.
146. The hardware requirement of a
memory mapped 1/0 peripheral [A] arithmetic
I/O.
[A] is less than the [B] logical
[B] is same as that of the
[C] arithmetic and logical
[CJ is more than the
[D] Cannot be compared with
[D] control
147. What will be the content of the
output port, if the following code is 150. Singly-excited magnetic system is
executed on 8085 microprocessor?
applicable in which machine?
IN FF
XRA A [A] S3mchronous motor
OUT FE
[A] OO [B] DC motor
[B] FE
[C] Reluctance motor
[C] FF
[D] None of the above [D] DC generator
6-A 31 [ P.T.O.
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SPACE FOR ROUGH WORK 6-A 32 MM23/6(050)—50)(4
Page 1 of 32
Source: Madhya Pradesh Public Service Commission. Question paper published by Madhya Pradesh Public Service Commission.