APSC Electrical Inspector (Grade-I) 2025: Electrical Inspector (Grade-I) (Advt. 14/2024), General Studies & Electrical Engineering
Text of page 1
Dt|PDDl24
Series
Test Booklet No. :
00221 TEST BOOKLET
GENERAL Stuprps & ElpctnlcAL ENGINEERINc
TiEe Allowed i 2 Hourg Full UarLr : 2OO
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3. All questions carry equa.l marks.
TL. Alrtar€h..t .iould b. .uboltt d to th. Ilvltlhtot.
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Suppos€ the folowing question is aaked i
The capital of Bsngl,adesh is
(A) Chennai ul
(B) LondoD
lC) Dhaka
a
(D) Dhubri
you will have four alternadves in tlle Answer-Sheet for your response corresponding to each question of the
Test Booldet as bclow :
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In the above illustration, ifyor:r chosen response is altemative (C), i.e., Dhaka, then the same should bc markcd
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Th. Ga.DplG rhott! rtov. l. ti. odtr cotrGct Ecttod of .!.rarln!i
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tr.B. : Tlr.rG rlll bG ..trtlvc @ l,'26 itai I (orcl EarL .8.la.t G.ch ttola .!.',rlt.
126-A I No. of Questiotrs : lOO I
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1. Consider the following statements S€lect the correct answer from the
regarding the Vigran Dhara Scheme codes given below.
of the Government of India
' (e) (i), (ii) and (iii) are correct
(i) It aims to enhance the S & T (B) (ii)' (ii0 and (i9 are correct
infrastructure uv ro"tiJ"g ,,iu- -,
equipped R&D laboratory in (C) (1), (ii, and (iv) are correct
academic institutions. (D) All statements are correct
(ii) It aims to promote research in
key areas such as sustainable 3. Which one of the following statements
energ/, water and other critical is correct regarding RHUMI-I?
sectors. (O It is the Iirst reusable hybrid
(iii) It aims to enhance the rocket launched by India'
participation of vromen in the @) It is India's first fast breeder
Iield of S&T, with the goal of nuclear reactor.
achiwing gender parity (c) It is the name of India,s first
Science, Technolosv , T
and indigenously built submarine'
lnnovation (sTI).
(iv) rt aims to reinrorce t"' L:el#"'itB$3"r-1ffi:
lnnovajol
at all levels, from. school Indian army.
education to industry and
startups. 4. Consider the following statements
Select the correct answer from the regarding 'Ivlission Basundhara,
codes given below. launched by the Government of
Assam :
(A) (i) and (ii) are correct
correct
(B) (ii) and (iii) are t" hilni 'ffi"'k.r,"flffi:
(C) (ii), (iii) and (iv) are correct and Disaster Management
(D) AII statements are correct Department'
(ii) Its dm is to ensure emploJ.ment
2. Consider the following statements in generation in the State.
connection with India's participation (iii) It aims to make land revenue
and achievements in the Psris services more accessible to
Summer Olyrnpics held itt 2024 : citizens.
0 The Indian contingent consisted (iv) It is a programme designed to
of 117 athletes. ensure sustainable development
(ii) Indian athletes won a total of of the tea gardens'
12 medals which included Select the correct answer from the
2 silver and 10 bronze. codes given below.
(iii) Manu Bhaker won the first (A) (i) and (ii) are correct
medal for India'
(iv) One Indian athlete was
E) (i) and (iii) are correct
disqualified for not firfixing th; (c) (ii) and (iv) are correct
weight restricUons of an event. (D) (i) and (iv) are correct
El/PED/24126-A 2
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5. Consider the following statements 7. Match the pairs given below and
regarding the 'Action Plan for choose the correct match from the
Introduction of Cheetah' in lndia : codes given below :
(i) The first batch of 8 cheetahs Nam.es qPorrs
was received from Namibia. (Sportsperson) assoriated with
(ii) The second batch of 20 cheetahs (a) Jamuna Boro (i) Cricket
will be procured from South
Sudan. (b) Nayanmoni (ii) Boxing
(iii) The first batch of cheetahs Saikia
received were released in Kuno (c) Jintimani Kalita (iii) Athletics
National Park.
(iv) The second batch will be (d) Amlan Borgohain (iv) Lawn BaIl
released in Manas National Codes :
Park.
(A) {aF(i}, (bF(ii), (cF-{iii}, (dHro
Select the correct statements from
the codes given below. (B) (aFUi), (uF(i), (cF(iv), (a)--(ili)
(A) (i), (iii) and (M (c) (a)-(ii), (bF(iv), (c)-.-(i), (d)--(iil)
(B) (ii) and (iii) (D) (aF(iii), (bF(i), (cF(i9, (dF(ii)
(c) (i) and (iii)
(D) (ii) and (M Consider the following statements
regarding the National Sports Day of
Which of the following statements India :
is/arc nd corrrct with regard to
National Register of Citizens, Assam : (i) It is celebrated on 29th of
(i) The present NRC has its root in September, every year.
the Assam Accord signed in the (ii) It is celebrated to commemorate
year 1985, the birth anniversar5r of Major
(ii) The NRC is a list of a1l the legal Dhyan Chand.
citizens of Assam. (iii) It is celebrated to commemorate
(iii) NRC updation basically means the birth anniversar5r of Milkha
the process of enlisting the SinCh.
names of citizens based on
Electoral Rolls up to 1971 and (iv) It is celebrated to commemorate
1951 NRC. the birth anniversar5r of Ranjit-
(iv) The NRC is govemed by the sinhji Vibhaji Jadeja.
National Register of Citizens Select the correct statement/
Act, 1985. statements from the codes given
Select the statement/statements below.
which is/are ltot coraccl. (A) (i) and (ii)
(A) (i) onry
(B) (iii) and (iv) (B) (i) and (iii)
(c) (i) and (ni) (c) (i) and (i9
(D) (iv) only (D) only (ii)
E,rlPE,Dl24l26-A 3 lP.r.o.
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List-I gives the names of persons 11. Arrange the following events of the
associated with music and List-II Indian National Movements in the
gives the names of musical correct sequence of their happening
instruments. Match List-I and from the codes given below :
List-II and select the correct match
from the codes given below : (i) Formation of Muslim league
List-I List-II (ii) Cripps Mission
(a) Tanmoy Bose (i) Classical (iii) Rowlatt Act
!6l.alis[
(iv) Partition of Bengal
(b) Indta P. P. Bora (ii) Flutist
Codes :
{c) Prabhat Sharma (iii) Tabla
@) (ivf(iii)+-(ii)+-(i)
(d) Parween Sultana (iv) Classical
Dance {B) (iv}-(i)"--(iiif{ii)
Codes : (c) (iHivHii}--{iii)
(A) (a)-(iii), (bF(i9, (c)-(ii), (dF0) (D) (iHivF(iiiHii)
(e) (aFQ, {bl-(ii), (c}-(iii), (dHru
(c) (aF(ii), (b)-(iii), (cF09, (dF(l) Consider the following statements
and select the correct answer from
(D) (aF(iii), (b)-(iv), (c)r-(i), (d)-(ii) the codes given below :
(i) The Brahmo Samaj was
founded by Raja Ram Mohan
lO. Which of the following awands were Roy.
conferred on Dr. Bhupen Hazarika?
(ii) The Arya Samaj was founded by
(i) Dada Saheb Phalke Award Dr. Atmaram Pandurang.
(ii) Bharat Ratna (iii) Pradhana Samaj was founded
by Dayananda Saraswati.
(iii) Padma Bhushan
(iv) Padma Vibhushan (iv) Ramkrishna Mission was
founded by Swami
Select the conect answer from the Vivekananda.
codes given below.
Codes :
(A) (i), (ii) and (iii) are correct (A) Only (i) is correct
(B) (0, (ii) and (iv) are correct (B) (i) and (i9 are correct
(C) (ii), (iii) and (iv) are correct (C) (ii) and (iii) are correct
(D) Al1 are correct (D) All statements are correct
EtIPED/24126-A 4
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13. Consider the following statements 15. Assamese language has been
regarding the Drain of Wealth declared as a Dhrupadi language.
Theory': Consequent to this declaration, the
Union Government is required to
(i) This theory was put forward by
Dadabhai Naoroji. (i) ofrer financial gant to
universities in other countries
(ii) Lala Lajpat Rai submitted this to open study centres to
theory to the Simon popularize the language
Commission as an explanation
of India's poverty.
(ii) institute professional chair in
all central universities
(iii) Mahatma Gandhi launched the (iii) institute two international
Swadeshi Movement to awards in the language
establish the truth of this
theory. (iv) tal<e necessary steps to provide
safeguard to the language
(iv) The theory hightighted how Select the correct answer from the
British economic policies codes given below.
exploited India.
Select the correct answer from the
(A) (i), (ii) and (iii) are correct
codes given below. {B) (ii}, (iii) and (iv} are correct
(A) (i), (ii) and (iv) are correct (C) (i), (iii) and (iv) are correct
(B) (n) and (iii) are correct P) An of the above are corect
(C) (i) and (iv) are correct 16. List-I gives the names of some
(D) (iii) and (iv) are correct temples/monastries in India and
List-II gives the names of Places
L4, Which of the following statement/ where tl:ese are situated. Match
statements is/are correct?
List-I and List-II and select the
correct match from the codes given
(il Claraka tumhita deals mainly below:
with surgery. List-I List-II
(ii) One of the oldest palm leaf (Temples/ Motl,.stries) (Pla,ces)
manuscripts of Sttshn/la (a) Lingaraj Temple {i) New Delhi
&mhita is preserved at the
Kaiser Library of Nepal. (b) Rumtek Dharma (ii) Bhubaneswar
Chakra
(iii) The three 'doshas' (faults) (c) L-akshmi Nersyan (iii) Thiruvanan-
central to Alrurveda are 'vata' thapuram
Temple
(wind), bitta' (bile) and 'kaPha'
(phlegm). (d) Padmanabha- (M Gangtok
swamy Temple
Select the correct answer from the
codes given below.
Codes:
(A) Only (i) is correct (A) (aF(i), (bF(ii), (cHiii), (dH'9
(B) (i) and (ii) are correct (B) (aF(iii), (bF(r9, (c|-(i), @f(ii)
(C) (ii) and (iii) are correct (c) (aF(r9, FF-(i), (cF(4, 6}-(iii)
(D) All statements are correct (D) (a)-(iil, &F(i9, (cF0), GFGii)
EtIPED/24126-A 5 lP.r.o.
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17. Consider the following pairs : As per judgement of the Supreme
Court of India, which of the following
Famous Banks of the iuer constitutes the basic structure of the
places where situoted. Indian Constitution?
(a) Ayodhya Ganga (i) Federalism
(b) Ahmedabad Sabarmati (ii) Social justice
(c) Sambalpur Mahanadi (iii) Fundamental Duties
(d) Siliguri Teesta (iv) Freedom and dignity of the
individual
Which of the pairs given above Select the correct answer from the
is/are laoorrrctly matched? codes given below.
(A) Only (a) (4 (i) and (iii) are correct
(B) (a) artd (c) (B) (ii), (iii) and (iv) are correct
(c) only (c) (C) (i), (ii) and (i9 are correct
(D) (b) and (c) (D) Only (ii) and (i9 are correct
Consider the following statements 20. Consider the following statements
regarding Andaman and Nicobar and select the statement/ statements
Islands : which is/are corr.r,cf. I
^ot
(i} A city in these islands is named (i) e-Prastuu is a project by the
National Information Centre,
as Sri Vliaya Puram. Assam, to standardize and digitize
(ii) One of the islands has a Government Websites and public
national park called Mount administration system.
Manipur. (ii) e-Prastuti ensures uniformity in
all Assam Government Websites.
(iii) One of the aboriginal tribes who
live there are known as the (iii) e-Prastuti ensures consistent,
Uyghur. accurate and updated content
in the Government Websites.
(iv) These islands have the only
active volcano in the Indian (iv) e-Prastuti ensures upgradation
subcontinent. of Website development skills of
Government employees through
Select the correct answer from the training and workshop.
codes given below.
Codes :
(A) (i), (ii) and (iii) are correct (A) onlv (il
(B) (iii) and (iv) are correct (B) onty (i) and (ii)
(C) Only (i) and (ii) are corect (c) (i), (ii) and {iii}
(D) (r, (ii) and (iv) are correct (D) (ii), (iii) and (iv)
Er/PED/24126.A 6
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21. Which of the following statements 23. In the midterm examination, Rabin
with regard to the Constitution of and Rubul scored more than Haren.
India are correct? Paban scored more than Rubul in
(i) The 4th Schedule of the the same examination. Elased on the
Constitution deals with above information, one concludes
allocation of seats in the that among Rabin, Rubul, Haren
council of States. and Paban, Haren's score is the
lowest.
(ii) The 6th Schedule deals with
provisions relating to the Identiff the nature of the conclusion.
administration of tribal areas in (A) The conclusion is true
some States.
(B) The conclusion is false
(iii) The 7th Schedule deals with
special status for the States of (C) The conclusion is uncertain
Nogeland and Jammu and (D) Data are not sulficient to arrive
Kashmir. . at a conclusion
(iv) The l0th Schedule deals with
and elaborates Fundamental
Duties of citizens. 24. Consider the following statements :
Select the correct ansvrer from the (i) While going out for morning
codes given below. walk, Mr. Bhuyan took the
(4 (ii) and {i9 are correct umbrella with him after
checking the weather report.
(B) (in) and (i9 are correct (ii) Anticipating a tralnc congestion
(Cl (i) and (ii) are correct on account of the scheduled
(D) (ii) and (iii) are correct protest rally of the local trade
union, Mr. Gupta decided to
22. Consider the following statements leave the oflice early.
regarding the RESET programme of (iii) Mr. Borah bought a particulsr
the Government of India : brand of smartphone after
(i) It aims to empower the rural referring to several favourable
youth. reviews posted by satisfied
(ii) It aims to empower the retired customers.
government employees. (iv) Mr. Das usually buys lottery
(in) It aims to rehabilitate drug- tickets on Sunday because one
addicted persons. of his close friends had told him
that Sunday is his luclry day.
(iv) It aims to empower retired
sportspersons. Identi.ry the speculative activit5r from
those narrated above from the codes
Select the correct statement from the given below,
codes given below.
(A) (i) and (iii) (A) (i)
(B) (ii) and (i9 (B) (ii)
(c) only (iii) (c) (iii)
(D) only (iv) (D) (iv)
E,TIPED/24126-A 7 IP.T.O.
Text of page 8
25. Identiry the missing letter from the 29. There are twenty p€ople working in
codes given below : an ofrce. The first group of five
people works between 8 AM and
2 PM. The second group of ten
people works between 1O AM to
4 PM. The third group of five people
works between 12 noon to 6 PM.
Cd.es: There are three computers in the
ofhc€ which all employees frequently
(A) A (B) B use. During which of the following
(c) c (D) D hours, the computers are likely to be
used most?
26. Identi$ the most appropriate (A) I PMto3PM
substance that can be added to the
given list from the codes given (B) 12 noon to 2 PM
below:
(C) 2PMto4PM
carbon dioxide, methane, (D) Cannot be ascertained
nitrous oxide, CFC-12, ?
Codes : 3(). Read the following statements and
(A) acetic acid conclusions carefirlly. Select the set
of conclusions which logically follows
(B) xenon dioxide from the given statements. Choose
(C) formaldehyde the correct option from the codes
given below :
(D) HFC-23
Statements :
27. The combined age of four persons is 1. Some cubes are squares.
80 years at present, What was the
combined age of the same four 2. All squares are circles.
persons 3 years ago?
Conchsions :
(A) 77 years (B) 74 years
(a) All cubes are circles.
(C) 71 years (D) 68 years
(b) Some circles are cubes.
28. Naren can tJpe l0O pages in (c) Some circles are squares.
1O hours, Rani can do the same
work in 15 hours. Both Na.ren and (d) All squares are cuks.
Rani work together for 5 hours. The
rernaining job was done by Rakhi in Codes :
2 hours. If Naren and Rani got (A) Only conclusion (a) follows
? 2,4OO for ttre whole work, how
much did Rakhi get for the work (B) Conclusions (a), p) and (c) follow
done by her?
(A) ? 3oo (B) ? 4oo (C) Only conclusions (b) and (c) follow
(c) r soo (D) ? 600 (D) Conclusions (c) and (d) follow
EUPED/24126-A I
Text of page 9
31. If a battery has a nominal voltage of The voltage of the node a with
1'25 V to 1'5 V, what is the tYPe of respect to o for the ckcuit shown in
cell used? Fig. 2 is
(A) Lithium ion o b
^^^^
)
@) Irad acid
(C) Nickel-cadmium
204 t) ?2a r C,(J 104
(D) Zinc-silver oxide o
Fig. 2
32. is one of the most imPortant (A) 20 v
materials that is also known as solar
-grade silicon. (B) 40 v
{A) Crushed silicon (c) s0 v
(B) Crystalline silicon (D) 60 v
(C) Powdered silicon
(D) Silicon
35, The current waveform, as shown in
Fig. 3, is applied in a pure resistor
1O Q (ten ohms)- The Po\r,er
33. Norton equivalent between A and B dissipated in the resistor is
for the circuit shown in Fig. 1 is
0.8 s)
Fig. 3
Fig' 1
(A) 27o w
(A) 2A and 2'5 Q
(B) 13s w
(B) o'5A and 1 Q
(C) lAand2Q (c) s2 w
(D) O'4 A and 2 Q (D) 7w
EI/PED/241?,6-A 9 IP.T.O.
Text of page 10
A charge of I coulomb is placed near 4(). A current of
a grounded conducting plate at a
distance of 1 m. What is the force 0. 5 + 0. 3 sin (Dt - O. 2 sin 2rot
between them? is passed through a moving coil and
a moving iron ammeter which are in
(A)
1N series. The reading of moving coil
4reo and moving iron ammeter will be
respectively
1N
(B) (4 O'5 A and 0.561 A
8ruo
(B) 0'6 A and 0.561 A
(c)
1w
162e6 (c) 0'561 A and O.5 A
(D) l6nso N (D) O.l A and O.5 A
37. In a given circuit in Fig. 4, the value 41. The experimental setup in Fig. 5
of R that will give critical damping is below measures the value of
4F IH unknown resistance in two steps :
r_t _tH01,-0T\
I t-U I
* When V=24Y, r is set at 4OOQ
and S = 8O Q, the galvanometer
shows a deflection of 3O'.
+. * When switch is thrown to position
2, the supply voltage drops down
Fig. 4 to 12 V and the galvanometer still
(A) 2(l (B) lQ shows a deflection of 3O".
(c) 4o (D) 10 (l The value of unknown resistance is
38. An alternator is delivering power to a
balanced load at unit5r power factor.
The phase angle between the line
voltage and the line current is
(A) e0' (B) 60.
(c) o' (D) 30"
Fig. 5
39. If the readings of two wattmeters are
equal and positive in two-wattmeter (4 80fl
method, the load power factor in a
balanced 3-phase, 3-wire circuit will (B) 60()
be
(A) zrro (B) O.5 (c) 40C)
(c) 0'866 (D) unity (D) 20a
EtIPED/24126-A 10
Text of page 11
42. Two ammeters, one with fr:Il-scale 45. In case of 3-phase induction motor,
current of l mA and internal shaft power is 2700 W and
resistanc€ of IOOO and the other mechanical losses are 18O W. At a
fi:ll-sca]e curent of lOmA and slip of 4olo, the rotor ohmic losses are
intemal resistance of 25 O are in
parallel. What is the total current (A) 11s.2 W
these two meterc can carry urithout
any meter out of scale? (B) 12Ow
{A) lmA (c) 108 w
(B) lOmA (D) losw
(C) ll mA
46. A 6-pole Lap wound DC machine has
(D) smA an armature resistance of O'O6 O. If
the machine is rewound for wave
winding, then its armature resistance
43. The firll-scale deflection current of a is
meter is I mA and its internal
resistance is lOO Q. This meter is to (A) 0.06 o
have full dellection when I OO V is
measured. What is the value of
series resistor to b€ used?
(B) 10.36 ()
(A) looko (c) o.54 o
(B) ee.9o k() (D) 1.o8f)
(c) 99.ee o
47. A DC series motor is driving a
(D) loo o constant torque load, at 5OO r.p.m.,
the field turns are divided into tqro
groups connected in series. If the
field turns are coffrected in parallel,
44. A 2OO V/ 1OO V, 50 Hz transformer is then speed will be
to b€ excited at 4OHz from l0OV
side. For the exciting curent to be
same, the applied voltage should be
(A) 5OO r.p.m.
(A) lso v 500
(Bl 8ov
(B)
E r.p.m.
(c) loov (C) 50o x Jf r.p.m.
(D) r25 v (D) 1OOO r.p.m.
Et/PE,D/24126-A 11 lP.T.O.
Text of page 12
If two 5OO V full-scale voltmeters y1 51. The transfer function of the system
and V2 having resistances 2OO kO/V described by
and 250 kO/V, respectively, are
connected in series to measure
9OO V, then O'! *OO *r,
(l{) V1 and V2 read 40OV each dtz dt =*dt
(B) V1 reads 400V and I/2 reads with u as input and y as output is
500 v
(c) SoOV and V2 reads s+2
400^1!"d"
Yt (A)
v 12 +"
(D) V1 and V2 read O V
(B)
s+1
A sinusoidal waveform, when a2 +a
observed on an oscilloscop€, has a
peak-to-peak amplitude of 14 cm.
If the vertical sensitivity setting is (c)
5 V/cm, then RMS value of the
voltage will be
(A) 24.8 v (D)
2s
(B) 49.6 v a';
(c) e.e v
(D) 3.s4 v
The eigenvalues of the system .
represented by
For the system
. to 10 o'l
X=l12 31 t1l
sllX+l lu .
X=llo 01
L0 ol
Lol tx
l0 oo 1l
Lo o0 rl
which of the following statements is
true?
(A) The system is controllable but are
unstable.
(B) The system is uncontrollable (A) 0, o, o, 0
and unstable-
(C) The system is controllable and (B) 1, 1, 1, 1
stable.
(c) 0, o, 0, -1
(D) The system is uncontrollable
and stable. (D) l, o, o, o
Dt/PEDl24l26-A t2
Text of page 13
33. A control system is defined by ttte 56. The impulse response of an LTI
following mathematical relationship : system is h(t)= e-stu(t). If the
d'I^
* od! * s, = t21t - e-2t
,1 output of t]:e system is
dtz dt y(t)= e-3tu(t)- e-st u(t), then the
Ttre response of the system at , + -
is input x(t) is given by
(A) x=6 (A) e-3tu(t)
{B) x=2
(B) 2e-3t ultl
(c) x = 2'4
(Dl x=-2 (c) e-stu(t)
54. The roots of the closed-loop (D) 2e-stu(r)
characteristic equation of the system
shown in Fig. 6 are 57. A transfer function of a system is
given as
u(t) alt)
100
s2 + 2Os + IOO
Fig. 6
The system is
(A) -1 and -5 (A) an overdamped system
(B) 6 and 10 (B) an underdamped system
(C) -4 and - 15
(C) a critical damped system
(D) -6 and - 10
(D) an unstable system
The loop giatrr GH of a closed-loop 58. A transmission line having a surge
system is given by the following impedance of 4OOQ is connected
expression : with a cable which has surge
ft impedance of 4OO. A surge
s{s+2)(s+4) magnitude of IOOkV is travelling
from the transmission line towards
The valuc of k for which the system the cable. Thc transmitted voltage
just becomes unstable is will be
(A) k=6 (E1OOkV
(B) k=8 (B) 30.6 kv
(c) k=48 (c) 18.18 kv
(D) k=e6 (D) 36.36 kV
Et/PE,D/24126-A 13 IP.T.O.
Text of page 14
59. The total iron loss in a transformer 63. The divergence of the vector field
core at normal flux densit5r was
measured at 2SHz and at 50 Hz and V lx, y, zl=-lxcosxy+ y)i + (gr cos:rg)j
was found to be 25OW and 8OOW
+(srn z2 +x2 + g2'1k
respectively. The hysteresis loss at
5O Hz would be is
(A) 100 w
(l{1 22cosz2
(B) lso w
(c) 200 w (B) sinry+2zcosz2
(D) 600 w (C) x sin xU - cos z
60. A two-winding 22OV/7[OV, l'skvA (D) sinry
transformer is reconnected as a
22OV /33OV auto-transformer. It is
rereted as 64. A solid sphere made of insulating
material has a radius R and has a
(A) 3'88 kvA total charge Q distributed uniforrnly
(B)4'4S8kVAinitsvolume'\trrhatisthemagnitude
of electric field intensit5r D, at a
(C) 1'58 kVA distance r (0 < r < R) inside the
sphere?
(D) 2.258 kVA
61. The power is transmitted tlrough a 1 q
,al
I'r' 4,!€g R3
transmission line of impedince
lr + jxl at equal voltage at both ends.
The maximum power can be (B) 3 q
transferred under the steady-state 4zeg R3
condition if
(A) x=r (C) I a
,2
(B) * = Jd, "*"
1 QR
(c) * = Jd, (D) 4n€o
ro
(D) x =2r 65, A 1-O half-wave rectifier is used to
supply to a load of impedance 8 Q
62. To test the insulator qgpingt HV from 2ZOv, 50 Hz AC supply at a
surges caused by lightning, the test firing angle of 6O". The effective
normally adopted is value of voltage is
(A) 50 c/s dry flash-over test (A) 160 v
(B) impulse flash-over tist (B) 772v
(C) 50 c/s flash-over test (c) 14o v
(D) 50 c/s wet flash-over test (D) 12oV
EUPDD/24126A t4
Text of page 15
66. Which of tJle following specifications 69. The i-u characteristic of the diode in
is not correct for a common-collector the circuit shown in Fig. 9 below is
amplifier?
1kr)
(A) HiCh i/p impedance
(B) Iow o/p impedance .r,o,
(C) High voltage gain
{D) High current gain I
Fig. 9
67. In a transistor circuit shown in
Fig. 7 below, the collector to ground o. u >o.z v
voltage is +20V. The possible i=1lu-o'7
soo
condition is
I oa , u<o.TY
The current in the circuit is
(A) lOmA (B) 9'3 mA
(c) 6'67 mA (D) 6'2 mA
+10 V
A converter which can operate both
in 3-pulse and Gpulse mode is a
Fig. 7 (A) l-phase full-converter
(A) collector-emitter terminal shorted (B) 3-phase half-wave converter
(B) emitter to ground coonection (C) 3-phase semi-converter
open (D) 3-phase ftrll-converter
(c) 10 kQ resistor open
71. A four-quadrant chopper ccznot be
(D) collector-based terminal shorted operated as
(A) one-quadrantchopp€r
68. The circuit shown in Fig. 8 below
isa (B) cycloconverter
(C) inverter
R-t
rffif-l-v""' 72.
(D) bidirectional rectifier
For low-speed high-power reversible
lLl operation, the most suitable drives
are
Fig. 8 (A) voltage source inverter-fed AC
drives
(A) low-pass filter
(B) curent source inverter-fed AC
(B) high-pass filter drives
(C) band-pass filter (C) dual converter-fed DC drives
(D) band-reject filter (D) cycloconverter-fed AC drives
E,I/PED|24|2GA ls lP.T.O.
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73. The total gain of a mtrltistage 77. In PAM, t.I:e carrier wave consists of
amplifier is less than the product of a periodic train of rectangular pulses
the gains of individual stages due to and the carrier frequency is equal to
(A) power loss in the coupling (A) the bandwidth of the modulating
device signal
(B) loading effect of the next stage (B) the sampling rate of the
(C) the use of many transistors modulating signal
(D) the use of many capacitors (C) at least ten times greater than the
bandwidth of the modulating
74. Consider an angle-modulated signal signsl
x(t) = s gssl2r t 1o6t + 2sin18ooo :rt1 +
(D) twice the bandwidth of the
modulating signal
4cos(80o0 tt)l V
A I MHz sinusoidal signal carrier is
The average power of x(t) is amplitude modulated by a
(4 low (B) 18w sJrmmetricsl square wave of period
lOO ps. Which of the following
(c) 20w (D) 28w frequencies will not be present in
the modulated signal?
A message signal
(A) 99o kHz (B) to2o Wz
m (t)= ges29gg rt + 4 cos 4000 n,
(C) 1010 kHz (D) 103O kHz
modulates the carrier
c ltl= c6g2*f.'
79. A 4 GI{z carrier is DSB-SC
modulated by low-pass message
where f" = I MHz to Produce an AM signal with maJ.imum frequency of
signal. For demodulating the 2 MtIz. The resultant signal is to be
generated AM signal, using an ideally sampled. The modmum
envelope detector, the time constant frequency of the sampling impulse
RC of the detector circuit should train should be
satisff (A) a MHz (B) A G}{z
(A) 0.5 ms<RC<1ms (C) 8 MHz (D) 8'OO4 GI{z
(B) lps<<RC<O.5ms 80. The frequency modr"rlated (FM) radio
frequency range is nearly
(C) RC << I ps (A) 2500-3000 MHz
(D) RC>>0.5ms (B) 1s0-2oo MHz
(C) 90-105 MHz
76. In a commercial broadcasting (D) 3O-7O MHz
system, the FM signal has a centre
frequency 105MHz and the highest 81. The output of a logic gate is I when
frequency of 105.3 MHz. When all its inputs are at logic O. The gate
modulated by a signal 5 kHz, the is either
modulation index will be (A) a NAND or an EX-OR gate
1 (B) a NOR or an EX-OR gate
(A)6 (B) 6 (C) an AND or an EX-OR gate
(cl 2 (D) s (D) a NOR or an EX-NOR gate
E,L/PE,Dl24l26-A 16
Text of page 17
The output Yof the logic gate circuit 87. A 4-pole generator with 16 coils has
shown in Fig. 10 is a twolayer lap winding. Ihe pole
pitch is
(4 32 (B) 16
Fig. 10
(c) 8 (D) 4
(A) 1 (B) o 48. When the shunt field of a DC
(c) x (D) , compound generator is connected
across bottr in series field and
83. The demodulation of a delta- amature, such a connection is
modulated signal is achieved by known as
(4 differentiation (A) short shunt
(B) sampling (B) long shunt
(C) integration (C) cumulativecompounding
(D) band-pass filtering (D) difierential c.ompounding
44. In a 4OO kV network, 36O kV is
recorded at a 4OO kV bus. The The current drawn by a 22OY DC
reactive power absorbed by the motor of armature resistance O'5 O
shunt reactor rated for 50 MVAR, and back e.m.f. 2OOV is
4OO kV connected at the bus is
(A) 61.73 MVAR (A) 40 A (B) 44 A
(B) 55.56 MVAR (c) 40o A (D) 44O A
(c) 4s MVAR
(D) 40.5 MVAR 9(). A DC motor develops the maximum
mechanical power when the
85. A lightning arrester connected amature is such that
betureen the line and earth in a
povrer system (A) back e.m.f. is equd to $ tfr of
(A) protects the terminal equipment the applied e.m.f.
against travelling surges (B) back e.m.f. is equal to one-half
(B) protects the transmission line of the applied e.m.f.
against direct lightning stroke (C) back e.m.f. is equal to ]tn of
(C) supresses high frequency the applied e.m.f.
oscillation in t]:e line
(D) reflects back the travelling wave (D) back e.m.f. is equal to t rd of
approaching it the applied e.m.f.
86. Wave winding is employed in a DC 91. If the dimensions of all parts of the
machine of synchronous generator and the
(4 high current and low voltage number of field and the armature
rating turns are doubled, then the
(B) low current and high voltage generated voltage will change by a
rating factor of
(C) high current and high voltage
rating (A) 1 (B) 2
(D) low current and low voltage rating (c) 4 (D) 8
EtlPE.Dl24l26-A L7 lP.T.o.
Text of page 18
92. The magnetic freld required to 97. The line constants of a 2OO km, 3{,
reduce the residual magnetization to 5O Hz transmission line are given as
zero is called following :
(4 retentivity A= D = O'93a 21.2"
(B) coercivity
(C) hysteresis B = 731.2 2723" Alphase
(D) saturationmagnetization C= O.OOI Z9O' S/phase
Load frequency control is achieved
The sending-end voltage is 230 kV.
by properly matching the individual T?re value of the line
machine's
current, when the load is
disconnected, will b€
(A) reactive power
(B) generated voltage (A) 0A
(C) turbine inputs (B) 132'8 kA
(D) turbine and generator rating (c) 1oo.skA
94. Bundled conductors are mainly
(D) 141-s A
used for high voltage overhead
transmission lines to Torque/weight ratio of an
(A) reduce transmission line losses instrument indicates
(B) increase mechanical strength of (4 selectivity
the line (B) accurary
(C) reduce corona
(C) fidelity
(D) reduce sag
(D) sensitivity
95. Series capacitive compensation in
EHV transmission lines is used to 99. Compared to continuous time
(4 reduce the line loading system, the discrete system is
(B) improve the stability of the (A) more accurate and more stable
system
(C) reduce the voltage prolile (B) more accurate but less stable
(D) improve the protection of the line (C) less accurate and less stable
(D) less accurate but more stable
In a Schering bridge balance, the
following values are obtained :
C2= IOO pF, Rs= 1OO O, &= 3O0 (2,
The steady-state performance of a
Ca= O.5 pF, f = 50 Hz
control system yields a non-zero
Iinite value of the velocit5r error
The unknown capacitance C1 and its constant. The type of the system is
loss angle 6 are respectively (A) Type 0
(A) 3oo pF, o.27"
(B) 3o0 pF, 2.7" (B) Type 1
(C) 300 pF, 2.7" (C) IYpe 2
(D) 10o pF, 2's" (D) Type 3
Et/PED/24126-A 1E
Text of page 19
SPACE FOR ROUGH WORI( EtlPE.Dl24l26-A 19 lP.r.o.
Text of page 20
SPACE FOR ROUGH WORI<
***
Et/PED/24126-A 20 T25-8Ox4Official key not published for this paper.
Page 1 of 20
Source: Assam Public Service Commission. Question paper published by Assam Public Service Commission.