IV Year – Electrical & Electronic Engineeringieoweb.s3.amazonaws.com/Papers-16/Question...

IV Year

Email: [email protected]

SPACE FOR ROUGH WORK

IEO-2016

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1. For all positive numbers x and y which of following functions is f(x

(A) f(A) = a2 (B) f(A)= a+1

2. Find the wrong number in the series 2, 6, 29, 146, 877, 6140

(A) 6140 (B) 2

3. In the sentence given below, pick up one option, which is most nearly same in meaning as the

word printed in bold, and can replace it without altering

Being a member of this club, he has certain

(A) status (B) truth

4. In the following question, choose the word which is the exact OPPOSITE of the given word.

NIGGARDLY

(A) Frugal (B) Thrifty

5. Pick out the most effective word from the given words to fill in the blank to make the sentence

meaningfully complete.

If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must

also be ........... in the sincerity of the other side.

(A) Faith (B) Belief

6. B and C working together can do a job in 24 days. After working together for 15 days, B left. C took

15 more days to do the remaining job. If B works

(A) 30 (B) 40

7. A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the

customer. Besides, he also cheats both his supplier and his buyer by 100 grams wh

selling 1 kilogram. Find the percentage profit earned by the shopkeeper.

(A) 30 (B) 35

8. In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they

can be selected such that atleast 2 b

(A) 100 (B) 205

Year – Electrical & Electronic Engineering

[email protected], Website: www.engineeringolympiad.in


Section-I: General Ability

or all positive numbers x and y which of following functions is f(x-y) = f(x) - f(y)

f(A)= a+1 (C) ( )f A a= (D) f(A)=

the series 2, 6, 29, 146, 877, 6140

2 (C) 29 (D) 6

In the sentence given below, pick up one option, which is most nearly same in meaning as the

word printed in bold, and can replace it without altering meaning of sentence.

Being a member of this club, he has certain rights.

truth (C) virtues (D) privileges

In the following question, choose the word which is the exact OPPOSITE of the given word.

Thrifty (C) Stingy (D) Generous

Pick out the most effective word from the given words to fill in the blank to make the sentence


........... in the sincerity of the other side.

Belief (C) Substance (D) Certainty

B and C working together can do a job in 24 days. After working together for 15 days, B left. C took

15 more days to do the remaining job. If B works alone, in how many days can he finish the job?

40 (C) 48 (D) 60

A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the

customer. Besides, he also cheats both his supplier and his buyer by 100 grams wh

selling 1 kilogram. Find the percentage profit earned by the shopkeeper.

35 (C) 32 (D) 29

In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they

can be selected such that atleast 2 boys are there?

205 (C) 185 (D) 211

www.engineeringolympiad.in 1 of 12

f(y)

f(A)= -3a

In the sentence given below, pick up one option, which is most nearly same in meaning as the

privileges

In the following question, choose the word which is the exact OPPOSITE of the given word.

Generous

Pick out the most effective word from the given words to fill in the blank to make the sentence


Certainty

B and C working together can do a job in 24 days. After working together for 15 days, B left. C took

alone, in how many days can he finish the job?

A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the

customer. Besides, he also cheats both his supplier and his buyer by 100 grams while buying and

In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they

IV Year



IEO-2016


9. 80 percent of the employees in a company are male. 10 percent of the employees in the company are

currently in Tamilnadu. Of the employees in Tamilnadu, 40 percent are in Chennai, 40 percent are in

Coimbatore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What

percent of the company's female employees are currently in Chennai?

(A) 18 percent (B) 15 percent

10. Average traffic at Paradise X

respective value during Thursday

are possible for average traffic for all days (in vehicles per minute)?

(i) 16 (ii) 20

(A) Only ii (B) ii and iii

11. You win some and loose some. You must enjoy winning. But do not let it go to the head. The

moment it does, you are already on your way to failure. If you encounter a failure, don’t beat

yourself for it or anyone else for that matter.

Accept it, look at your own share in the problem, learn from it and move on.

(A) Where there is a will there is a way

(B) Failure is the stepping stone of success

(C) Winners don’t do different things, but do things differently.

(D) When you lose, don’t lose the lesson

12. Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for

the first one-third distance, 20 km per hour for the next one

the final 60 km. What was Janak’s average speed for the race?

(A) 15 km/h (B) 16.67 km/h

13. In question below, there is a sentence of which some parts has been jumbled up. Rearrange these

parts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper

sequence. It would

(P) appear from his statement

(R) in dealing with the strike

The proper sequence should be:

(A) RPSQ (B) PSQR




80 percent of the employees in a company are male. 10 percent of the employees in the company are


tore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What

percent of the company's female employees are currently in Chennai?

15 percent (C) 21 percent (D) 6 percent

Average traffic at Paradise X roads during Monday-Thursday is 21 vehicles per minute. The

respective value during Thursday-Sunday is 28 vehicles per min. Which of the following values

are possible for average traffic for all days (in vehicles per minute)?

20 (iii) 28

ii and iii (C) i and iii (D) i, ii, and iii

You win some and loose some. You must enjoy winning. But do not let it go to the head. The


urself for it or anyone else for that matter.

Accept it, look at your own share in the problem, learn from it and move on. Choose the summary:

Where there is a will there is a way

Failure is the stepping stone of success

fferent things, but do things differently.

lose the lesson

Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for

third distance, 20 km per hour for the next one-third distance, and 10 km per hour for

the final 60 km. What was Janak’s average speed for the race?

16.67 km/h (C) 22.5 km/h (D) 16.36 km/h

In question below, there is a sentence of which some parts has been jumbled up. Rearrange these

ts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper

appear from his statement (Q) about the policy of management

in dealing with the strike (S) that he was quite in the dark

nce should be:

PSQR (C) RQPS (D) PRQS


80 percent of the employees in a company are male. 10 percent of the employees in the company are


tore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What

6 percent

Thursday is 21 vehicles per minute. The

Sunday is 28 vehicles per min. Which of the following values

i, ii, and iii

You win some and loose some. You must enjoy winning. But do not let it go to the head. The


Choose the summary:

Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for

distance, and 10 km per hour for

16.36 km/h

In question below, there is a sentence of which some parts has been jumbled up. Rearrange these

ts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper

about the policy of management

PRQS

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14. There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude

problems. It is suggested that two

as for each other question. How many minutes should be spent on general aptitude problems?

(A) 30 (B) 45

15. According to the Sci-True Lab, the new micro

identified once as spherical, once as cubical,

the same shape twice.

Which of the following is implied in the above statement?

(A) The new micro-organism can be expected eventually to assume every possible shape.

(B) The new micro-organism is

(C) The Sci-True Lab is not a reliable source of information about the new micro

(D) The new micro-organism can be identified on the basis of some characteristic other than shape.

16. Choose the best inference from the given statement

Statement: If it does not rain throughout this month, most farmers will be in trouble this year.

(A) Most of the farmers are generally dependent on rains.

(B) There is no water in the ponds

(C) The monsoon Winds are late this year.

(D) Wheat and paddy require water for cultivation.

17. Choose a pair that has most similar relationship to the given pair

Interested: Zealous

(A) Wild: Bizarre

(C) Hateful: Nauseous

18. In a survey of unemployed, three

the survey may underestimate the proportion of respondents who are dishonest, because________.

(A) Some dishonest respondents taking the survey might

(B) Some generally honest respondents taking the survey might have claimed on the survey to be

dishonest

(C) Some respondents who claimed on the survey to be at least a little dishonest may be very dishonest

(D) Some respondents who claimed on the survey to be dishonest may have been answering honestly




There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude

problems. It is suggested that two-thirds as much time be spent on each general aptitude problem

for each other question. How many minutes should be spent on general aptitude problems?

45 (C) 50 (D) 60

True Lab, the new micro-organism is discovered in certain lakes was

identified once as spherical, once as cubical, and once as spiral, but has never been seen to assume

Which of the following is implied in the above statement?

organism can be expected eventually to assume every possible shape.

organism is different from all organisms previously known.

True Lab is not a reliable source of information about the new micro

organism can be identified on the basis of some characteristic other than shape.

best inference from the given statement

: If it does not rain throughout this month, most farmers will be in trouble this year.

Most of the farmers are generally dependent on rains.

There is no water in the ponds

inds are late this year.

Wheat and paddy require water for cultivation.

Choose a pair that has most similar relationship to the given pair

(B) Decent: Contemporary

(D) Hungry: Ravenous

In a survey of unemployed, three-fifths admitted to being at least somewhat dishonest. However,


Some dishonest respondents taking the survey might have claimed to be honest on the survey

Some generally honest respondents taking the survey might have claimed on the survey to be

Some respondents who claimed on the survey to be at least a little dishonest may be very dishonest

Some respondents who claimed on the survey to be dishonest may have been answering honestly


There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude

thirds as much time be spent on each general aptitude problem

for each other question. How many minutes should be spent on general aptitude problems?

organism is discovered in certain lakes was

and once as spiral, but has never been seen to assume

organism can be expected eventually to assume every possible shape.

different from all organisms previously known.

True Lab is not a reliable source of information about the new micro-organism.

organism can be identified on the basis of some characteristic other than shape.

: If it does not rain throughout this month, most farmers will be in trouble this year.

fifths admitted to being at least somewhat dishonest. However,


have claimed to be honest on the survey

Some generally honest respondents taking the survey might have claimed on the survey to be

Some respondents who claimed on the survey to be at least a little dishonest may be very dishonest

Some respondents who claimed on the survey to be dishonest may have been answering honestly

IV Year



IEO-2016


19. Identify the choice that replaces the underlined part to form a logically and grammatically correct

statement.

The greatest obstacle to economic and environmental improvements in

mammoth foreign debt.

(A) developing countries is its

(C) developing countries is their

20. Data of different states regarding population of states in the year 1998:

Total population of given states = 32,

Following table shows that sex & literacy wise population ratio:

States Sex

Male

Andhra Pradesh 5

Madhya Pradesh 3

Delhi 2

Goa 3

Bihar 3

Uttar Pradesh 3

Tamil Nadu 3

What will be the total percentage of total number of males in U.P, M.P & Goa together to the total

population of all given states ?

(A) 28.5% (B) 18.5%

Goa

12%

Bihar

11%




Identify the choice that replaces the underlined part to form a logically and grammatically correct

The greatest obstacle to economic and environmental improvements in developing countries is its

developing countries is its (B) the developing countries is its

developing countries is their (D) the developing countries is their

Data of different states regarding population of states in the year 1998:

Total population of given states = 32, 76,000

Following table shows that sex & literacy wise population ratio:

Sex Literacy

Female Literate Illiterate

3 2 7

1 1 4

3 2 1

5 3 2

4 4 1

2 7 2

4 9 4


population of all given states ?

18.5% (C) 23% (D) 32%

A.P

25%

M.P

20%

Delhi

8%

Goa

12%

Bihar

11%

U.P

15%

T.N

9%


Identify the choice that replaces the underlined part to form a logically and grammatically correct

developing countries is its

eir


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21. The voltage across the last resistor is V. All the resistors are unity. Then V

(A) 13V (B) 19V

22. Let p be the probability that a man aged y will get into an accident in a year. What is the

probability that a man among ‘n’ men of all aged ‘y’ will get into accident first?

(A) ( )n1

1 1 pn − −

(B) 1

n

23. An induction motor is delivering an output of 37 kW and has an efficiency of 90%. At this load,

the stator and rotor copper loss each equals to the iron loss. The mechanical losses are one third of

the no load loss. What is the value of mechanical loss?

(A) 1174.6 W (B) 1370.3 W

24. A power system network is shown below:

H 4MW S / MVA, f 50Hz,= − =

of maxP is __________.

(A) 0.63Hz (B) 1.3

+

−

1Ω

SV

E 1.2PU= 1.2PU

#




Section-II: Technical

The voltage across the last resistor is V. All the resistors are unity. Then VS is

19V (C) 25V (D) 8V

probability that a man aged y will get into an accident in a year. What is the


( )n1

1 1 pn − +

(C) ( )

n1 p

n

− (D) n 1 1 p − −

delivering an output of 37 kW and has an efficiency of 90%. At this load,


is the value of mechanical loss?

1370.3 W (C) 587.3 W (D) 4111 W

A power system network is shown below:

H 4MW S / MVA, f 50Hz,= − = The frequency of oscillations when alternator is loaded to 80%

1.3Hz (C) 0.3Hz (D) 2.5Hz

1Ω 1Ω 1Ω

1Ω1Ω

+

−V1Ω

1.2PU

0.6PU V 1.0=


probability that a man aged y will get into an accident in a year. What is the


( )n

n 1 1 p − −

delivering an output of 37 kW and has an efficiency of 90%. At this load,


4111 W

The frequency of oscillations when alternator is loaded to 80%

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25. A 60 Hz transformer has hysteresis loss to be twice its eddy current loss when operated at rated

condition. What will be the effect on core loss when operated at 54 Hz and 90% of rated voltage?

(A) Reduces by 25.5%

(C) Decreases by 13.3%

26. In the following Op-Amp, when only

and when only 2V of 2 V is applied and

is approximately

(A) 13 dB (B) 20 dB

(C) 43 dB (D) 68 dB

27. Given a function f(t) as shown below.

The above signal is fed as input to (all

domain)

The magnitude of output at

(A) 1 (B) 0

28. Given: ( )dy

3 1 x ydx

= + − and y = 4 when x = 1. Using Runga

approximate value of y when x = 1.2 will be

(A) 0.419 (B) 0.519

F(j )ω

1−




A 60 Hz transformer has hysteresis loss to be twice its eddy current loss when operated at rated


(B) Increases by 16.6%

(D) Remains unchanged

Amp, when only 1V of 1 V is applied and 2V is grounded then output is

of 2 V is applied and 1V is kept at 0 V, output is 20 V then CMRR of op

20 dB

68 dB

Given a function f(t) as shown below.

The above signal is fed as input to (all inputs, outputs and system function given in frequency

The magnitude of output at 2

πω = rad/sec is

0 (C) 0.08 (D) 0.64

and y = 4 when x = 1. Using Runga-Kutta fourth order method, the

approximate value of y when x = 1.2 will be

0.519 (C) 0.613 (D) 0.318

+

−1V

2V0V

2

4

ω( )

2output

f(t)

E1+0

1


A 60 Hz transformer has hysteresis loss to be twice its eddy current loss when operated at rated


is grounded then output is -8 V

is 20 V then CMRR of op-amp

inputs, outputs and system function given in frequency

Kutta fourth order method, the

output

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29. The given figure shows a

switched at 1 kHz with a duty ratio D = 0.5. The

peak to peak ripple in load current

(A) 0.125A (B) 1.5A

(C) 2.625A (D) 5A

30. Consider the system shown in the figure

The D.C component in signal y(t) is

(A) 0.9341 (B) 0

31. The Transfer function ( )

( )

Y s

X s

(A) ( ) ( )

( ) ( )1 2

1 2

G s G s 1

1 G s G s

+ −

(B) ( ) ( )

( ) ( )2 1

2 1

G s 1 G s

1 G s G s

+ −

(C) ( ) ( )

( ) ( )1 1

1 2

G s 1 G s

1 G s G s

+ − +

(D) ( ) ( )( )

( ) ( )2 1

1 2

G s 1 G s

1 G s G s

+

+ +

X f

0 33−

34 55

3

f11−




The given figure shows a step down chopper

switched at 1 kHz with a duty ratio D = 0.5. The

peak to peak ripple in load current is close to _____.

1.5A

5A

Consider the system shown in the figure

signal y(t) is

0 (C) 12 (D) 8

)

)

Y s

X s of the LTI system shown below is

100V

200mH

( )1G s

( )2G s

( )X s

+

+

+

+

( )H f

f

2

1

02− 2

1Ω

1F

+

−( )g t

1− 1


200mH

+

−5Ω

i

( )Y s

( )y t

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32. A 80kW, 440 V, 800 rpm d.c motor is operating at 600 rpm and developing 75% rated torque is

controlled by 3 − φ , six-pulse thyristor converter. The input of the converter is

a.c supply, excitation is kept constant. If the back emf at rated

triggering angle of the converter.

(A) o53.91 (B) 69.31

33. Solution for ( 2 2 2 2 2 2

S

a x b y c z dS+ +∫

(A) 4

abc

π (B)

3 abc

34. A 1− φ , 220V energy meter

10A passing through it for 6 hours at 0.85 p.f. Calculate the power factor of the load if the number

of revolutions made are 2375 for same operating voltage and a current of 12A for 4 hours.

(A) 0.4734 (B) 0.5265

35.

In the above digital circuit, to get an output bit as ‘B

(A) 1 0Select 0;S S 10= =

(C) 1 0Select 1; S S 01= =

36. A Lossless Transmission line having a surge impedance loading (SIL) of 2280MW. A series

capacitive compensation of 30% is emplaced. The surge impedance loading of compensated

transmission line will be _________.

(A) 1174.6 MW (B) 1370.3

Quad ruple

Two-to-one

Line MUX

3 2 1 0A A A A

3 2 1 0B B B ,B

Select

4




A 80kW, 440 V, 800 rpm d.c motor is operating at 600 rpm and developing 75% rated torque is

pulse thyristor converter. The input of the converter is

is kept constant. If the back emf at rated condition is 410V, determine the

triggering angle of the converter. o69.31 (C) o95.31 (D) 31.59

)1

2 2 2 2 2 2 2a x b y c z dS−

+ + where S is surface of ellipsoid 2 2 2ax by cz 1+ + =

4

3 abc

π (C)

4abc

3

π (D) None of these

, 220V energy meter disc makes 5329.5 revolutions when meter has a constant load of



0.5265 (C) 0.8939 (D) 0.9989

In the above digital circuit, to get an output bit as ‘B2’ what are the values of select and S

(B) 1 0Select 1;S S 10= =

(D) 1 0Select 0; S S 01= =

A Lossless Transmission line having a surge impedance loading (SIL) of 2280MW. A series

compensation of 30% is emplaced. The surge impedance loading of compensated

transmission line will be _________.

1370.3MW (C) 2725.12M W (D) 2350.82MW

4 1

MUX

× 2B

1S

0S


A 80kW, 440 V, 800 rpm d.c motor is operating at 600 rpm and developing 75% rated torque is

3 − φ , 415V, 50Hz

is 410V, determine the

o31.59

2 2 2ax by cz 1+ + = is

None of these

disc makes 5329.5 revolutions when meter has a constant load of



0.9989

of select and S1S0?

A Lossless Transmission line having a surge impedance loading (SIL) of 2280MW. A series

compensation of 30% is emplaced. The surge impedance loading of compensated

2350.82MW

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37. Consider the differential equation,

Find the P.I. of the above equation.

(A) 2

cosnx xsin nxlogsecnx +

n n

(C) 2

cosnx xsin nxlogsecnx -

n n

38. A DC series motor is running a constant

The field resistance and armature resistance are 0.05

is placed across the field resistance to inc

speed is _________.

(A) 1174rpm (B) 1370

39. For the figure shown, (r t sin t.

peak at a frequency of _________

(A) 3.5 rad/sec

(B) 2.8 rad/sec

(C) 4.3 rad/sec

(D) 6.8 rad/sec

40. For common base operation of a BJT, which of the following are correct?

I. High voltage gain

II. Excellent high frequency response

III. High input resistance

IV. Ideal current buffer

(A) I and II (B) I and III

41.

2 y1

0 y

xydxdy−

∫ ∫ =___________.

(A) 0.392 (B) 0.292




Consider the differential equation, [ ]2

2

2

d yn y sec nx n 0

dx+ = ≠

the above equation.

cosnx xsin nx

n n (B)

2

cosnx xsin nxlogcosnx +

n n

cosnx xsin nx

n n (D)

2

cosnx xsin nxlogcosnx -

n n

A DC series motor is running a constant – torque load at 800 rpm taking 30A from 200V supply.

The field resistance and armature resistance are 0.05Ω & 0.01Ω respectively. A diverter of

is placed across the field resistance to increase the speed. If the field flux is unsaturated, the new

1370rpm (C) 1085rpm (D) 1000rpm

)r t sin t.= ω and the steady state response C(t) will exhibit a response

t a frequency of _________ .

For common base operation of a BJT, which of the following are correct?

Excellent high frequency response

I and III (C) I, II and III (D) I, II and IV

=___________.

0.292 (C) 0.492 (D) 0.153

( )r t +

- ( )16

s s 4+


torque load at 800 rpm taking 30A from 200V supply.

respectively. A diverter of 0.06Ω

rease the speed. If the field flux is unsaturated, the new

000rpm

response C(t) will exhibit a response

I, II and IV

( )c t

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42. A CRO is used to record the impulse wave during a test in a laboratory as shown in figure.

The parameters of the impulse wave are rise time=1.2

waveform without any missing data, the bandwidth of the CRO s

(A) 0.292MHz (B) 0.526MHz

43. The power dissipated in the 5

shown in figure is

(A) 2.4W (B) 1.9W

(C) 3.2W (D) 8W

44. Vector magnetic potential A due to a direct current in a conductor in free space is 2 2 2

xA (x y )a wb / m= + . Determine the magnetic field produced by the current element at (1,2,3).

(A) o

4H =

µ (B) H

45. The frequency of the pulse at x

(A) 10Hz (B) 15Hz

10-bit

Ring

counter 0x 1x

( )320kHz

Im pulse

Generator




A CRO is used to record the impulse wave during a test in a laboratory as shown in figure.

The parameters of the impulse wave are rise time=1.2 secµ and fall time= 50 sec.µ

waveform without any missing data, the bandwidth of the CRO should be greater than ________

0.526MHz (C) 0.893MHz (D) 0.99MHz

The power dissipated in the 5 Ω resistor for the circuit

1.9W

8W

Vector magnetic potential A due to a direct current in a conductor in free space is

. Determine the magnetic field produced by the current element at (1,2,3).

o

1H =

µ (C)

o

3H =

µ (D) H 0=

The frequency of the pulse at x4 in the network shown below is

15Hz (C) 20Hz (D) 25Hz

4-bit

parallel

counter

Mod 25

Ripple

counter

4-bit

Johnson

counter

2-bit Ring

counter

2x

3x 4x

+ −

10Ω

10V

2A

oz

1 secτ = µ

Test

object

oz


A CRO is used to record the impulse wave during a test in a laboratory as shown in figure.

50 sec.µ To record the

hould be greater than ________.

0.99MHz

Vector magnetic potential A due to a direct current in a conductor in free space is

. Determine the magnetic field produced by the current element at (1,2,3).

H 0=

bit Ring

counter

5x

− + −

5Ω1Ω

5V

CRO

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46. Consider the Hay’s bridge shown in the figure where

1 2 3R 1k R 8k R 800= Ω = = Ω

is 5. The bridge is under ba

ω=1000rad/sec. The value of resistance R

(A) 246Ω

(B) 6.4kΩ

(C) 6.14kΩ

(D) 10kΩ

47. For the circuit shown in figure, the input to the circuit is 240V, 50H

thyristor is 45°

RMS value of the thyristor current is ________.

(A) 5.5A (B) 2.67A

(C) 13.94A (D) 11A

48. The equivalent capacitor arrangement of a two string insulator is given in figure. The maximum

voltage insulator is shown in figure. The maximum voltage that each unit can

not exceed 17.5 kV. The line voltage of complete string is__________

(A) 17.5 kV

(B) 33kV

(C) 35 kV

(D) 37.3 kV




Consider the Hay’s bridge shown in the figure where

R 1k R 8k R 800= Ω = = Ω . Quality factor of the coil

is 5. The bridge is under balanced condition.

The value of resistance R4 is

For the circuit shown in figure, the input to the circuit is 240V, 50Hz. The firing angle of the

the thyristor current is ________.

2.67A

11A

The equivalent capacitor arrangement of a two string insulator is given in figure. The maximum

voltage insulator is shown in figure. The maximum voltage that each unit can

not exceed 17.5 kV. The line voltage of complete string is__________.

10Ω

1C c

8=

C

V

C

1R

D

1L

2R


. The firing angle of the

The equivalent capacitor arrangement of a two string insulator is given in figure. The maximum

voltage insulator is shown in figure. The maximum voltage that each unit can with stand should

E 200V=

3R

D

4R

4c

IV Year



IEO-2016


49. Figure shown represents the phasor diagram for a synchronous motor operating at 0.6 leading

power factor with no armature resistance. The current and power factor remains same & current is

15A. Calculate the torque angle of the synchronous motor if the arm

included.

(A) 38.65°

(B) 32.96°

(C) 23.57°

(D) 22.96°

50. For the network shown below, switch was open for very long time and is thrown at t = 0. The

value VL at t = 1 sec is given by

(A) 0.47 V

(B) 1 V

(C) 1.47 V

(D) Can’t be determined




Figure shown represents the phasor diagram for a synchronous motor operating at 0.6 leading


15A. Calculate the torque angle of the synchronous motor if the armature resistance of

network shown below, switch was open for very long time and is thrown at t = 0. The

at t = 1 sec is given by

10V

8V

Ω20 Ω10

10H

A AR I

AE

V 60Vφ

=

AE

s AjX I j40V=


Figure shown represents the phasor diagram for a synchronous motor operating at 0.6 leading


ature resistance of 2Ω is

network shown below, switch was open for very long time and is thrown at t = 0. The

10H L

V

+

−

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