(Solved paper) GSECL JE Electrical 22 Feb 2020, shift 2 paper solution

Post Name: VS JE Electrical

Exam Date: 22-Feb-2020

Exam Time: 12:30-14:30

Sections in this paper :

10% - General knowledge

10% - English

60% - Electrical Engineering topics (Syllabus same as GATE)

10% - Computer knowledge

10% - Gujarati grammar

(We are working on preparing solutions for each question. )

All answers are as per asnwer key provided by GSECL.

GENERAL KNOWLEDGE QUESTIONS (10 marks) :

Question No.1

Who was sworn in as the 47th Chief Justice of India recently?

(A) Justice Sharad Arvind Bobde

(B) Justice Kurian Joseph

(D) Justice Dipak Misra

Ans: A

As on Feb 2022,

Chief justice of India - N. V. Raman

RBI Governor - Shaktikant das

Deputy governor RBI - T Rabi Shankar

Gujarat energy, petrochemical, money minister - Kanubhai Desai

Question No.2

What is the full form of the pesticide DDT?

(A) Dichloro Diphenyl Tri-chloromethane

(B) Dichloro Diphenyl Tri-chloroethane

(D) Dibromo Diphenyl Tri-chloroethane

Ans:B

It is used as an insecticide mostly in agricultural field.

Question No.3

The world second largest lake, Lake Superior is located in which continent?

(A) North America

(B) Europe

(D) Asia

Ans: A

Lake Superior is the largest and northernmost of the Great Lakes of North America, and among freshwater lakes, it is the world's largest by surface area and the third-largest by volume. It holds 10% of the world's surface fresh water.

Question No.4

In December 2019, with which country India signed industrial security agreement for transfer of defence

technology?

(A) Bangladesh

(B) United States of America

(D) China

Ans: B

Question No.5

GMT is an abbreviation of ____________

(A) Greenwich Mean Time

(B) Greenwich Management Time

(D) Greenwich Measurement Time

Ans: A

Question No.6

Which among the following Indian states shares its border with Pakistan?

(A) Punjab

(B) Himachal Pradesh

(D) Uttarakhand

Ans: A

Additional information :

Redcliffe line - separates India and Pakistan, India and bangladesh

Durand line - between Pakistan and Afghanistan

McMohan line - India and China

Question No.7

The Congress passed the resolution on purna swaraj in its session held at which place?

(A) Calcutta

(B) Lahore

(D) Madras

Ans: B

Question No.8

Who has been awarded, the International Children's Peace Prize for the year 2019 for her global campaign called

'School Strike'?

(A) Neha Gupta

(B) Greta Thunberg

(D) Malala Yousafzai

Ans: B

Question No.9

What is the base year for the Index of Industrial Production in India in January 2020?

(A) 2011-12

(B) 2018-19

(D) 2004-05

Ans: A

Question No.10

Who is the first Indian woman to win an Olympic medal?

(A) P.V.Sindhu

(B) Sakshi Malik

(D) Karnam Malleswari

Ans: D

ENGLISH KNOWLEDGE QUESTIONS (10 marks) :

Question No.1

Replace the underlined phrase grammatically and conceptually with the help of the given options. If the given

sentence is correct then select the option 'The given sentence is correct'.

If you enlarge your laptop screen, it is much easy to seeing the photos than if you keep them smaller

(A) it is most easier to see the photos

(B) The given sentence is correct

(D) it is much easier to see the photos

Ans: D

Question No.2

Find the word which is correctly spelt from the given options.

(A) Intermitent

(B) Malpractice

(D) Recomended

Ans: B

Question No.3

Fill in the blanks with suitable Preposition from the given alternatives.

Jean is going to depart __________ 7 p.m from our place

(A) on

(B) in

(D) at

Ans: D

Question No.4

Fill in the blanks with suitable Article from the given alternatives.

Today is ____________ third day of our annual meeting

(A) No article

(B) an

(D) a

Ans: C

Question No.5

Rearrange the following to form a meaningful sentence and find the most logical order from the given options.

P: is intended to give our readers an idea of the onerousness

Q: the special Supplement which we are issuing today

R: on which the people of India are setting out

S: as well as the grandeur of the great adventure

(A) SPQR

(B) RQSP

(D) QPSR

Ans: D

Question No.6

Choose the word which expresses nearly the opposite meaning of the given word " FORBIDDEN ".

(A) Allowed

(B) Closed

(D) Banned

Ans: A

Question No.7

Find the word which is correctly spelt from the given options.

(A) Continuance

(B) Quardilateral

(D) Affluant

Ans: A

Question No.8

Choose the best option from the given alternatives which can be substituted for the given word/sentence.

Completing a period of hundred years

(A) Protocol

(B) Centennial

(D) Universal

Ans: B

Question No.9

Choose the word which best expresses the similar meaning of the given word " REPLETE ".

(A) Empty

(B) Charged

(D) Enlarge

Ans: B

Question No.10

In the following question, one part of the sentence may have an error. Find out which part of the sentence has

an error and select the option corresponding to it. If the sentence contains no error, Select "No error'' option.

(Avoid punctuation errors)

(A) Either Ram or I / (B) am ready to / (C) completes this task / (D) NO ERROR

(A) C

(B) A

(D) B

Ans: A

ELECTRICAL ENGINEERING QUESTIONS (60 marks) :

Question No.1

The value of current ' I ' in the Figure shown below is ______.

(A) 20 A

(B) 100 A

(D) 80 A

Ans: D

Question No.2

Strain gauge is basically a ______.

(A) Active device which converts mechanical displacement into a change of resistance

(B) Passive device which converts electrical displacement into a change of resistance

(D) Active device which converts electrical displacement into a change of resistance

Ans: C

Question No.3

In a lap wounded DC generator, if the number of poles is increase by a factor of 2, then the generated emf will____.

(A) increase by a factor of 2

(B) decrease by a factor of 2

(D) remain same

Ans: D

Question No.4

The power factor of a single phase AC voltage controller feeding power to a pure resistive load is ______.

(A) 4 x (per unit load power)¹/²

(B) (per unit load power)¹/²

(Correct Answer)

(D) 2x(per unit load power)

Ans: B

Question No.5

For bolted fault, the positive sequence voltage at the point of fault location on the power system is zero for_______.

(A) Double line fault

(B) Single line to ground fault

(D) Double line to ground fault

Ans: C

Question No. 6

The polar plot for a transfer function with pure transportation lag is _______.

(A) A circle with centre at (-1,0) and radius =1 in the anti-clockwise direction

(B) A semicircle with centre at (-1,0) and radius =1 in the clockwise direction

(D) A circle with origin as the centre and radius=1 in the clockwise direction

Ans: D

Question No.7

A transmission line has 0.2 pu impedance on a base of 132 kV, 100 MVA. On a base of 220 kV, 50 MVA, it will have a puimpedance of ______.

(A) 0.2 × (132/220)²

(B) 0.1× (132/220)²

(D) 0.1 × (220/132)²

Ans: B

Question No.8

For the bus admittance matrix (Ybus) of a 4-bus system given in per unit, the buses having shunt elements are____.

(A) 1 and 2

(B) 1, 2 and 3

(D) 2 and 3

Ans: A

Question No.9

A transformer is said to be an isolation transformer, if its primary to secondary ratio is equal to ______.

(A) infinity

(B) 1

(D) 0

Ans: B

Question No. 10

Ans: A(As shown above)

Question No. 11

A system which has a unique relationship between its input x(t) and output y(t) is called _____.

(A) time invariant system

(B) non-invertible system

(D) invertible system

Ans: D

Question No.12

If the supply frequency for an induction motor is increased by 5%, then the synchronous speed will _______.

(A) decrease by 5%

(B) increase by 10%

(D) decrease by 10%

Ans: C

Question No.13

A 50W electric light bulb is connected to a 200V supply. Determine (a) the current flowing in the bulb and (b) the resistance of the bulb.

(A) 0.5 A and 400Ω

(B) 0.25 A and 800Ω

(D) 0.25 A and 400Ω

Ans: B

Question No.14

If an inductor carries an initial current ɪo before switching action (t=0-), then at instant t=0+ it acts as ______.

(A) an open circuit

(B) a constant current source

(D) a constant voltage source

Ans: B

Question No.15

In current source inverter (CSI), if the frequency of voltage input to CSI is 'f' Hz, then the frequency of the output

voltage is ______ Hz.

(A) f

(B) f/2

(D) 3f

Ans: B

Question No.16

The general f(x-z, x² - zy) =0 has its Lagrange's partial differential equation

Ans: B (As shown above)

Question No. 17

Ans: A (As shown above)

Question No. 18

If L1 and L2 are the self inductiones of the circuits and M is the mutual inductance between them, then the coupling coefficient k is_______.

Ans: C (As shown above)

Question No. 19

Given that w = f(z) = (6ax - 2y)+i(bx +3y) is analytic everywhere a and b are

(A) -1/2, 2

(B) - 1/2, -2

(D) 1/2, -2

Ans: C

Question No. 20

If there are 7 sources in a network out of which 3 are dependent and 4 are independent. For superposition principle ___________ sources are considered.

(A) 3

(B) 7

(D) 0

Ans: C

Question No.21

How many flip flops are required to design MOD-10 counter?

(A) 2

(B) 3

(D) 4

Ans: D

Question No.22

Ans: C (As shown above)

Question No.23

The gross mechanical power developed by a DC motor is maximum when _______.

(A) back emf Eb is equal to the applied voltage V

(B) back emf Eb is inversely proportional to the applied voltage V

(D) back emf Eb is equal to half the applied voltage V

Ans: D

Question No.24

In load flow studies, the quantities specified at a generator bus of a power system are ________.

(A) Q and δ

(B) V and δ

(D) P and Q

Ans: C

Question No.25

In a Cartesian coordinate system, the three coordinate axes x, y and z are at _____ to each other.

(A) 120 degree

(B) 45 degree

(D) 0 degree

Ans: C

Question No.26

The full load slip of a synchronous motor is ______.

(A) 4%

(B) 6%

(D) 2%

Ans: C

Question No.27

A differential amplifier has an open circuit voltage gain of 100. The input signals are 3.35 V and 3.25 V.

Determine the output voltage.

(A) 5V

(B) 15V

(D) 20V

Ans: C

Question No.28

Consider an analog signal xa (t)=3 sin(50πt). What is the Nyquist rate for this signal?

(A) 25 Hz

(B) 100 Hz

(D) 75 Hz

Ans: C

Question No.29

Full subtractor can be realized by using ______.

(A) two half subtractors

(B) two half subtractors and a NOT gate

(D) two half subtractors and a OR gate

Ans: D

Question No.30

For line-to-line fault, the value of zero sequence current is equal to _______.

(A) Fault Current (If) / 3

(B) Fault Current (If)

(D) Zero

Ans: D

Question No. 31

A 4-pole, 900 rpm DC machine has a terminal voltage of 220 V and an induced voltage of 240 V at rated speed.The armature circuit resistance is 0.2 Ω. Find the armature current.

(A) 200 A

(B) 100 A

(D) 50 A

Ans: B

Question No.32

In the circuit diagram of a Schering bridge shown in Figure, at balance condition, the unknown capacitance Cu and its equivalent series resistance Ru are given as ______.

Ans: D (As shown above)

Question No.33

Ampere's circuital law in magnetism is analogous to ______ in electrostatics.

(A) Faraday’s law

(B) Coulomb’s law

(D) Biot-Savart's law

Ans: C

Question No. 34

A 3-phase, 50 Hz, 6 pole induction motor runs at 960 rpm at full load. The slip 's' and frequency of rotor ' fr ' are____ and ______ respectively.

(A) 4 % , 20 Hz

(B) 2% , 100 Hz

(D) 4% , 2 Hz (Correct Answer)

Ans: D

Question No. 35

Ans: B(As shown above)

Question No.36

In step-up chopper, if ' Vs ' is the source voltage and ' α ' is duty cycle, then the output voltage of this chopper is

given by, _________.

(A) Vs/ (1+α)

(B) Vs/ (1-α)

(D) Vs(1+α)

Ans: B

Question No. 37

Ans: C(As shown above)

Question No.38

A second order IIR filter has been realized by using the transposed method. How many adders have been used?

(A) 3 (all 2-inputs)

(B) 3 (two with 2-inputs & one with 3-inputs)

(D) 3 (one with 2-inputs & two with 3-inputs)

Ans: B

Question No.39

An 800 kV transmission line has a maximum power transfer capacity of P. If it is operated at 400 kV with the

series reactance unchanged, the new maximum power transfer capacity is approximately ______.

(A) P/4

(B) P/2

(D) 2P

Ans: A

Question No.40

For the block diagram shown in Figure, the transfer function C(s)/R(s) is _____.

A) G1G2- G2- 1

(B) G1G2 +G2+ 1

(D) G1G1/ (1+G1G2)

Ans: A

Question No.41

A d.c. source has an open-circuit voltage of 30V and an internal resistance of 1.5Ω. The maximum power dissipated across the load is ________.

(A) 50 W

(B) 100 W

(D) 200 W

Ans: C

Question No.42

The complex Poynting Vector for a plane wave is given by

Ans: B (As shown above)

Question No. 43

Ohm's law analogy for magnetic circuit is _________.

(A) MMF = Flux / Reluctance

(B) Flux = 1 + (Reluctance / MMF)

(D) MMF = Flux x Reluctance

Ans: D

Question No.44

Two voltmeters A and B having resistance 4000Ω and 6000Ω respectively are jointed in series across 200 V supply. The voltage across the two voltmeters will be ______.

(A) VA = 200V and VB = 200 V

(B) VA = 80V and VB = 120 V (Correct Answer)

(D) VA =80V and VB = 80V

Ans: B

Question No.45

Ans: B

Question No. 46

The firing angle ' α ' of a single phase full converter feeding constant current into a load is 30 degree. The displacement factor of the rectifier is ______.

(A) 0.5

(B) 0

(D) 0.866

Ans: D

Question No.47

If f1 and f2 are half-power frequencies, such that f2 > f1, then the bandwidth B = _________.

(A) f2 - f1

(B) f1 / f2

(D) f2 / f1

Ans: A

Question No.48

Ans: C (As shown above)

Question No.49

Two wattmeters connected to measure the power in a balanced three phase load reads 1000 W and 250 W respectively. The later reading has been taken after reversing the connection of current coil. The total power taken by the load is________.

(A) 1000 W

(B) 250 W

(D) 500 W

Ans: C

Question No.50

Three identical resistances, each of 15 Ω, are connected in delta across 400 V, 3-phase supply. What value of resistance in each leg of balanced star-connected load would take the same line current across the same supply?

(A) 15 Ω

(B) 45 Ω

(D) 30 Ω

Ans: C

Question No.51

Which of the following electrical circuits represents the lag compensator network?

Ans: A(As shown above)

Question No.52

For starting of an induction motor, star/delta starting can be considered equivalent to an auto transformer

starter with the ratio of ______.

(A) 100%

(B) 25%

(D) 75%

Ans: C

Question No.53

If ' α ' is the forward current gain and ' β ' is the current gain, then in BJT, _______.

(A) α = β / (β -1)

(B) β = α / (1- α)

(D) β = α / (1+α)

Ans: B

Question No.54

An electron is travelling horizontally towards east. A magnetic field in vertically downward direction exerts a force on the electron along ______.

(A) East

(B) North

(D) south

Ans: D

Question No. 55

The system model described by the state equations

(A) observable but not controllable

(B) controllable and observable

(D) controllable but not observable

Ans: B

Question No.56

The solution of the differential equation

When x=1 is given by

Ans: C (As shown above)

Question No.57

For a transformer, if the full load copper losse are 'A' and iron losses are 'B', then the output kVA corresponding to maximum efficiency is given by ________.

Ans: A (As shown above)

Question No.58

If two capacitors of capacitances 3 µF and 6 µF are connected in series, then the total capacitance is ______.

(A) 18 µF

(B) 9 µF

(D) 2 µF

Ans: D

Question No.59

For the circuit shown in Figure, taking open as '0' and closed as '1', the output expression Y is given as

(A) A(B+C+D)

(B) A(BC+D)

(D) A+B+C+D

Ans: B

Question No.60

(A) - 3/2

(B) 5/2

(D) - 7/2

Ans: C

COMPUTER KNOWLEDGE QUESTIONS (10 marks) :

Question No. 1

Identify which is not the characteristic of Static RAM?

(A) Long life

(B) Faster

(D) Needs to be refreshed continuously

Ans: D

Question No.2

When one application layer protocol wants to communicate with another application layer, it forwards its data to_________________

(A) transport layer

(B) physical layer

(D) application layer

Ans: A

Question No.3

Identify whether the following statements are True / False:

Statement A: Rogue security software is malicious software that mislead users to believe there is a computer virus installed on their computer or that their security measures are not up to date.

Statement B: When adware is downloaded without consent, it is considered malicious.

(A) Both Statement A & Statement B are True

(B) Statement A is True and Statement B is False

(D) Statement A is False and Statement B is True

Ans: A

Question No.4

___________ is performed by one machine and its internet connection, by flooding a website with packets and making it impossible for legitimate users to access the content of flooded website.

(A) Pishing

(B) DoS attack

(D) SQL Injection attack

Ans: B

Question No.5

Expand UNIVAC

(A) Ultimate Native Indian Automatic Calculator

(B) Ultimate Native Indian Automatic Computer

(D) Universal Automatic Computer (Correct Answer)

Ans: D

Question No.6

Mention the keyboard shortcut for Superscript in Ms Word

(A) Ctrl+ Spacebar

(B) Control + Equal Sign

(D) Ctrl+End

Ans: C

Question No.7

TCP and UDP are two ____________ layer protocols that provide a different set of services to the network layer.

(A) network

(B) data link

(D) transport

Ans: D

Question No.8

Identify whether the following statements are True / False with respect to Batch Processing in OS:

Statement A:The OS defines a job which has predefined sequence of commands, programs and data as a singleunit.

Statement B:Jobs are processed not in the order of submission, i.e., last come first served fashion.

(A) Both Statement A and Statement B are True

(B) Statement A is True and Statement B is False

(D) Statement A is False and Statement B is True

Ans: B

Question No.9

Which type of OS is referred as loosely coupled systems?

(A) Distributed OS (Correct Answer)

(B) Time-Sharing OS

(D) Networking OS

Question No.10

What will the function key F10 do when pressed in Ms Excel?

(A) Turns extend mode on or off.

(B) Creates a chart of the data in the current range in a separate Chart sheet.

(D) Calculates all worksheets in all open workbooks.

Ans: C

GUJARATI LANGUAGE AND GRAMMAR QUESTIONS (10 marks) :

For any further queries please comment below.

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