Electrical Engineering Objective Questions Part 4

8/9/2019 Electrical Engineering Objective Questions Part 4

1/14


2/14

w

w . e x a m

r a c e

. c o

9

IU

.

II

13

An IC smJcture is sh

own in

lite

gi\tn

fig

tJJ\:, The d ~ ' \ 9 t c ll

tlll cmt

l1c l\:lllizcd

l > c t l l < > : t t l l l t 1 1 l i t t t

$ 1 n h d c d (t1

t1d

tJ)

is

a

a.

Resistor

b. Capal.ilor

c.

Bipolru-

u

wtsistm

d. MOS

lrill Si'ilor

The c o n i ~ J c t

bcill•'\:11

alumin

um (All

dlld

mod.:rnlul

y

dopL

ur

ampliflllf,

d1•1e

iJ

a.

~ o

pbnsc

g ~ 1>. 1\•ecn

in

pttl and

l illpUI Vll lillgC:S

b. 1go

•

phnse dumgc b e i w e ~ . ' l l

inpu1 tmd

11U

iplll

C ' U m . ~ \ I S

t . No pbast chan

ge

betwl'i n

ittpul

tl1ld

lllllp

UI

CUT and

11

0 pruse

O O l l l l £

~

lte1ween inpul

and

4l1Jit1L

1

ulloges

d,

l'fo

phnse chn

n

gc i)ctii'CCn inpot

nnd

uu

l

pu

l

u r r c n t s 1l ld

181)•

~ ~ > t ~ cha

n

ge

bd\WCO 111

pUl

and

001pu1

I

l L O ~ f

Tile lond

curren1J, fn

~

gl

1tn

drc

ult

+20V

a

Ill mA

b

411

"11

J

c )jm,\

d.

20

m.l

lkll

In

cmihcr

coupl

ed diO\,rcnliol

11111plifier


3/14

w w

w . e x a

m r a c e

. c o m

11. Ill

sutcl llt

COIIIIIlWIICllllOII

b

fn I V J X 1 S 4 . " l l

C r c o

n i e < ~ t f o n

c.. To combat fading fu mtcruwaw

Cl lJIUJIW Icn lJ

OU

l TD increase repentcr

SJI' Oing

in

microwav-e link

19. Smnhs chnns n

re

used

111 Qll

lllrn he:

mtpedance rclanonsalon£

a

a L o s s l c s . ~ r r n n ~ m l s s l o n l m e

for

diOerent

load i < u t ~

b LosS) l

t.m

sm1ssion l t n ~ for diOi:rcnt

loa,lcondllliub

c

Lo >y i o n

t ~ n n r n n U u

l

oa

d cqu.,l to

fine c h u r a c t ~ s

rmpcdancc

d losslcss tmnsmr.l51on

hnG

ICOllliiUicd

aL a load eq

ual

1u line cbaroclcnsnc

Impeda nce

20 A f r e q ~ n u y · m l d u l u voltage wave iS

g1ven as

V= 10

sm(:l.:n5

sm

400m)

The

Ctlrricr

froquency n

nr

l 1na.xmnull

dev 1o

1()u

o

rth

e Sii Jin l nre C . ~ I ) l i : C t i v c l v

a

IOMH7.mxl H 1 .

b.

100

MH l ~ m kHz

c

10

M t Mtl

I

ltH

d.

I00 MHz

mtd 10

kHz

11 A DSB

-

SC s1gnlll

being

Cletcc

l.:.1

n o h r Q n y

The phnm- error

in

he

locaUy geuemred canier will

n Cll ll'>C' phn.o;e deloy

b.

Ciluse

nhase distonio

nonly

c

Have

the·effed dOil'l

mi

Cl

sm.1ll

er i t . ~

A B C D

~ I d 3

b 4 I l 2

e

I 4 2 3

d 4 I 1 3

25

.26

J ol I I

for tile H

11ng

bloc)( ~ o d ~

tr

·n' b

t

01ol

ll'ord lcng

ll

t

uf

the blo

cl.

and

'II

' he

~ < : number

of m o m

b1

ts

.

Ulen

an

UJIOwablu


4/14

w w

w . e x a

m r a c e

. c o m

28.

29.

30.

1

33

.

F ~ r

the p r o d u c t - o f ~

u m s

C.'


5/14

w w

w . e x a

m r a c e

. c o m

List I

A GTO

th

yristor

B. Triuc

c

ICiB I

l

~ I I

L(SL

II

2

3

4,

i \ B

c

D

3. I 2 3 4

h I

2

·I

3

c.

2

_:1

4

d.

2 I

4

3

41 t'lull r.tl oOnirnO(:U.lqil

or u

lb

)

rl>tor takes

pla,ewbcn

9.

A

ood

e L'llrre

nt

beeomes lteto

b G>JtC current bel.l


6/14

w w

w . e x a

m r a c e

. c o m

Agwc

ll

Line

'olla11e

wi

th

120" firing

b I

,llld pi\IJ)o.> vnhnl c:

1\

alh

120"

fin Ill

e l,

lne

vollltllC

wilh I

&0 lir

11

ag

d.

Load phase

v o h ; ~ g e uh

ISO" i

ring

48

. The given figure

sho s

elec

tn

c

pu l

uss

lcs•

n c h r O

n 1 1 ~

Q5 U f UIIL'tion or torque Ullj IC 11ae

lo;td

ts Ud

denl}

tncrcnsed

fonn P

11

to

1

n r u l t h

motor oscillates around

6

•

between

l ,

jpl

/) ' '

cr

0

6, d,.

d-

uw

Conside

r

lbe

lrnlowing slatements demed

rro111

l i ~ : u r e r u i n ~

t

h

b . . ' l w e ~ n the-

tuowr

5po:d

' aud tl>

s y u d · o n o ~ speed

M,

at dtffc rent

points

tn

tbe oscillating

cycle:

II

AI

j)OIOI

I .

1tJ

c

m

liiJ

AI

JlO

II

ll

1.

w

hil

e

OJICIIIn

llll

g.

f'Min

tow

nrds 3.

1'1 '- 11

Ciii)A

t

poim

L wh ile

oscillatin

g from 3

towards

I n1

•

ro

,

\\hadl of the$u \ . ' t n C t ~ ~

h i

a' Ill

h l l l l

willt

the

lane

d

Lwnped

capacitances m senes wrth the

li•w

A lnnsm•s>oon

hnc

has eq ual

voltages "'

tile

lwo 1 /ld$

,

nJtutoltlllled COilStan t It) lwn

r c ~ A tbotd o fQ\

1ded

to

maintam

nJDs

lanl

o h a ~

(equal to

tl>e

end

vo llagcs)

at either Ute

mld-poim of

tl1e

li

ne

( c n ~ c 11

or

at 75'

1

o

oflhe di

slttnce li'mn r h ~

em

l (C

use

2) 1hen the ma\Jrnuna

power-transler capabilmcs of

Lb

e hoe m

the

o n g ~ n f t l

case I :lJJd case 2

u v e l }

will be mlbc

ratio

of

I I I

ll

11 1107.5

o. I 2 1

d. l:4"16

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7/14

w w

w . e x a

m r a c e

. c o m

54

ss

56

57

A s)lort length

of

cnble

is

connected

between dead-end towerand sub-stadon at

the

end

of a

trnnsmissi'on

line Which

of

the fo llowing will

decrease,

when

voltage

wave is

entering from overh

ead

line

t()

cable?

I

Velocity

of propaj ation of

voltage

w

2

Steepness of voltage wave

J . Magnitude.urvol

wgo

wave.

S e l e ~ 1 the correct

answer

using the codes

given

bel

ow

a

I

and2

b 2 nnd 3

c. andl

d.

4

2 and 3

The coro11a contn'butes a rd harmonic to

Ute chatgJng currant of the Lne.

because

it

a Occurs every half cycle of the

fundamemal frequency

b. Induces a

rd

hannonic voltage

bctwt,-en line and eatth

c Produces random

h a r m o n i c but

on ly

3rd harmonic is pas IC or Ute

Maloperation

of differential

prorection of

transfomters due to magnetizing inrush

cutrenl is prevent


8/14

w w

w . e x a

m r a c e

. c o m

3

.

64.

n ~ r c m o m o l

fuel oons 11 JU

t

MWh for 11

plum O M pf two unan lite

gi

ven by

dF, dP t •

0 A

4 0 0 and dF

1

rdP: 0411

I

320.

fha allocation

of oallls 1'

1

and

P

1

between the

l l ~ ~ I and

2. ~ p e c b v e li11

mhumum ~ ( l $ t 1>f gencrn lt

on

lbr a total

load ofllOO MW 1s

a

200 ~ 1 W

and

700 MW

h

JOOMW

nnd MOMW

c. 400 MW nnd 500 MW

d. s

oo

Mw

und

400 MW

Gwe

n (jgure

nn

elec110magn

et to

lin a

load of

W gram_

A'iSu

me mfmite

pt'nnimbih

ty for rron. 'be ampere

turn

s of

the exciting coil to m:timain an

eq

tiillbrium

nn

air-gap nf mm would

l:le

g.ven by

. ......

"-

o_g74

ll

·x

[I

b 0

282

IP.r

r

c

s74 IJx

.JA

d.

2

tlliV.t

. I

'

(1te

. > e f i c ~

11

1nding or a cunaulativdy

C u m p o , t

J e ~

de

tnotor

1S

shu"

-clrcllilo.l

wbtlo dnvmg a. load at

rated

lof

II£

shown 111

the

, l i V ~ I l

llgun:,

Mixhlne.A Mao5J

h\ c and V" is less than V

u

b Positiw nnd VA is thnn v

c.

NCW Vc nnd V,, l. ss Vn

d Negative

and

V"

tS gJ


9/14

w w

w . e x a

m r a c e

. c o m

9

711

71

ll Bo th

IW und

C\\ ore

~ O U I I O : C

hi

< e r l ~ s

with I ie

uon01rc

"uldfn):;.

b Both

I

W

nu

d C\V

01

connected In

purullcl wilh

the

nnnniUre \\11111111 ,

c:.

IW

tS

cuun

ecwd

c5t'I'IO:S hul CW 1s

111 pwa llel

with

the arnJJ\lUre

win

din

g

d.

1W

Is

COIUle(:led

in

parallel

blll

C

\\

is

connected in senes wnb the

annnlure

winding

A

J-phasc 20-polc, synchtOltOCr plm.SI.l

1s

neares1to

lL

500

v

b.

1

000

v

c.

15 v

d.

2000

v

11te Z.ert> Powl:r Fuclor

Char:lc1etl$

1e

I ZPFC), niOilj; willl

the

Open

-

Citcuh

Chantctoris lic (OC\1

:U

oho-.n

in

the

v e n

l i ~ ; u e

urc u

se

d

ttl determine the L e u k u ~ e

RcadDIICO

DrOl ~ nt he nut:d cum:m 1,

fro1111

he"Po

1l

cr

r i n n ~ l e '

AI3C

' '' ' 'glc,

c n:pt'CS>;I'"'

1.,.

I- V, )

dr(lp,

~ C I I U

o e· r·

r , _ ,

u. V ts mduccd.by tltc mmf All

b v, IS induced

by

l.he mmrBD

t: 1/

( Is induced b}' the nunfOF

d.

V

l:

and

the air-

gn

p

volmge

Er

are

180

•

out

of phase

at

zero p,(

load

To calcu late

t

he full

- food vohage

regulation of • synchronous ~ : e n e r a t o r al

omy < N e T

fi

tclot u.-lng mtnr melhod, [I tl

require

d to

ha

ve

11 Opcn-cll\•ull n11d shon - m ~ 1 1 1 1

m c l c

I Q S

b 0 1x:

t1

- oh'Cull

mtd

z ~ r o p m ~ er

fuQICJr

chaructt1ist

lcs

. , , , 1 ~

c

Oj)( ll

- ctrcull

b n r n n ~ u c ; s

lidd

c u m . ~ u

111

rutcd swl'l· ofrcuu ctll'lt111

and lmlln lltr

r c ~ i ~

d SIIQfl CirCilll Cl\llfiiCtt:nJiiC$, r< fO

flOWer fnctor Cl i111tC1enpeed rermlins rh osumo

71\

( < I I I S i d < ~ the

olf ()WIIIl i l l l l ~

A octhng lilt1

l

uls 111 l)ecm.se

I 1\fQm wmillllg

1 .

ClfCII-C II

'C\1

11

«1

www.examrace.co


10/14

w w

w . e x a

m r a c e

. c o m

2 Awohruy < V m d l n ~ is open-meuned

J Cap:u:iw

r is s

llon-circult..:C

d A is f.9lse but R is true

80

A.o;sertiun lA): Ir he Vllltugl'S ocros:. R. L

and C'

dements

comti.'Gt

cd

m s.m.:s In an

uc C1rcwt a r ~ 300 V. LOO V

and

500 V

r.:specnvcly , then the

to

tal

voltage

applied

lle500 V

Reason (It ): 11lo oJlllhc'tl • u l t u g ~ m LCR

sencs c 1 r c ~ h

1s equal to

the

mux

tmum

Joofl.t

voltage exrstmg a c r o s ~

Wl)

of these

el

ements

.

a Botb A nod R

are

true and R Is 1 1 1 ~

correct explanauon ofA

h Bllth A and R are lrue but R is NO I

Lh

e correct e"Jllannl l

on of

\

C A IS

tn1e but

R IS

d. A

IS

false

but

R

IS

true

81 A s . ~ e r t i o ( i\ ): l lnrdwute stack regi$1en;

speed

up the qpcmti(ln

qf

com]ltll

er

,

Rl llson (1{):

llnrdwllte sracl ' ~ t s

r ~ d u e t : the number

or

memo ) rererem:es

rcqu1red

11. fl1fl

:m

atmn or

A

\ i>

true

bUt R JS

faT<

d A is false but R

fs

l ue-

ln.


11/14

w w

w . e x a

m r a c e

. c o m

85

86

87

ss

c,

A is tTUe bu

t

R s false

d 1\ is

i i l i ~

but

Ris

true

Assertion (A): Square

law

detectors.

t Jough simple, are not s ~ t i s f a c O lor Ote

~ t i o n of amplitude modulated sig11als

Ren s

on

(R):

Square

Ia\\

detection leads to

l ~ t t s ~

second

bam10nie

f

A

b. Doth A 'lind R are 111.1e but R is NOT

correct ex planation of A

c.

A

is true b·ut R

is

fa lse

d A

is

false

but

R

1s

true

For ~ o t w o r k

sbown in

the

given fi ,'Urc. the

CUITent in the

20

resis1or wou

ld

be

;t.

. 5 A

b 20A

c, 251\

d. 30A

In

the _given

elrcuit.

initially

relnxed,.

tben

circuit will be

R

11 . .Zero

b

/ / 11.0{1

t

/II

c

-

f

-

I.

tl

.. ..(1 t

I /,

tf

the

inductQr is

the current

i ll

tlte

lu a two-po11 network, tlt

e output short

c::illlU1t

currellt

was

measured

while

the

W t rce vo

ltage

at th

e i

nput

was I V, the

value of i l ~

ou

tput currc,tt

would

pro,iM

the

parameter

a B

b

y l

89

90

"ll

I I o I I

c. y ~ l

d.

Ao

RC drlvins point impedBJlce

function

has

.


12/14

w w

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m r a c e

. c o m

9d

.

?5

11, 10

.15

b. II 2

c. 8.7

d 4

. j

The 1oltagc

v,

, for lhc

circw

l shm•n m the

IV

Cn

llgurc Wi

ll he

a.

b

v.

(1- ~

c

·t

::-·

)

d ~

Tho

de

compon


13/14

w w

w . e x a

m r a c e

. c o m

d

_,

103 A

systc : - : f ~ : - C( s)

G

1

(•l ~ ( J l I

- H e}

a

Gl (

..

)G

, (·

)

II

()

(s t I)( 1 3)(s

4)

Two branches (loci) of the

pint

drrected

along asymptotesarecentered at

a po1N

a.

3

b 4

c 2

tl - 1

T

he

number of roots

1n

the lefT-Iialf of s·

pl

ane forthe

equat ion s

3

-

4i+

s+

6 = 0,

would be

a.

b 2

c.

3

d 4

Consider the toll owmg features;

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14/14

w w

w . e x a

m r a c e

. c o m

1.

S q u i m : l ~ g e or r a ~ · u p

type rotor

.

2, N c : ~ lutenr

chnr. cte.istic.s.

3.

H1gb

X ' R rotio.

\Vhkh

of

thcs.: f ~ t o n . s ure I

IOSSossed

by •

two.,hase oc secvomototl

a

I

_,Z

and 3

h I and 2

c. 2 ond 3

d. 1

ft

nd

:l

·ntc c-urrent T fluwiog Uuuugh 11

tcsistonuc ur v• luc l000 l. 0.

2••

4Aj; o.s•.,

The

un

eed a iuty

lu

m e . u ~ u r c t u e n l of power

i,;

:

1600

\V c .

O,Ol

0

o

b.

1000

w

. .

0 2 ~ .

c. 1600 \V : O.OS

1

' o

tl

11\()0 \\ 1,2•n

114

.

T h ~

m p c < l ofn hnsio t bridgd ntm

l

an:

~ = 2 5 0 Q

rl.., = 0 0 ~ ~ ~

4 0 0 0 . .

Z. , - Unktto

wn

l

li l

'

lOOt)

rndiani>

, comp

on

of

t h ~

unknown

: arm

h:

the.:

resistance:

soo./iO n

n.

Series wiUt a e

apoc.itoJ

' o.f

2. u F

b. PMallel with n cn pac

uurof

2 11F

c. Series

whlt

an inductm of 2 tt

cl P:trallel with nn l n d u e ~ o r o f 2 I H

US . In n low power-J\Ic.tor waumelcr.

t•m

c

Which one of the followina : a u s ~ Ute dis

o

[n au indUCtion type of .notm nl

Electrical Engineering Objective Questions Part 4

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Transcript of Electrical Engineering Objective Questions Part 4