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Objective Questions

Latest MPTRANSCO Substation Attendant Exam Question (Objective Questions), MCQ in English

Subjects : Electrician/Lineman Trade, General Knowledge, Reasoning, Quantitative Aptitude

Question Bank MPTRANSCO Substation Attendant Exam - English

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Electrician/Lineman Trade

Question 1Single Answer

When a very small amount of higher conducting metal is added to a conductor, its conductivity will

A
increase
B
decrease
C
remain the same
D
increase or decrease depending on the impurity

Question 2Single Answer

An electrically balanced atom has 30 protons in its nucleus and 2 electrons in its outermost shell. The materials made of such atom is

A
a conductor
B
an insulator
C
a semiconductor
D
a superconductor

Question 3Single Answer

The temperature coefficient of resistance of a doped semiconductor is

A
always positive
B
always negative
C
zero
D
positive or negative depending upon the level of doping

Question 4Single Answer

In the slice processing of an integrated circuit

A
components are formed in the areas where silicon dioxide remains
B
components are formed in the areas where silicon dioxide has been removed
C
the diffusing elements diffuse through silicon dioxide
D
only on diffusion process is used

Question 5Single Answer

Permanent magnet loses the magnetic behaviour when heated because of
1. atomic vibration
2. dipole vibration
3. realignment of dipoles
Which of the above are correct?

A
1 and 2 only
B
1 and 3 only
C
1, 2 and 3
D
2 and 3

Question 6Single Answer

A semiconductor differs from a conductor in that it has

A
Only one path for the free electrons in the valence band
B
Only one path for holes in the conduction band
C
Two paths followed by free electrons and holes, one an ordinary path in the conduction band and the other one an extraordinary path in the valence band, respectively
D
Two paths followed by free electrons and holes, one an extraordinary path in the conduction band and the other one an ordinary path in valence band, respectively

Question 7Single Answer

Which of the following circuits is used for converting a sine wave into a square wave?

A
Monostablemultivibrator
B
Bistablemultivibrator
C
Schmitt trigger circuit
D
Darlington complementary pair

Question 8Single Answer

Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law ?

A
Capacitors
B
Inductors
C
Transistors
D
Resistance

Question 9Single Answer

Consider the following statements: A power supply uses bridge rectifier with a capacitor input filter. If one of the diodes is defective, then
1. The dc load voltage will be lower than its expected value
2. Ripple frequency will be lower than its expected value
3. The surge current will increase considerably
Which of the above statements are correct?

A
1 and 2 only
B
1 and 3 only
C
2 and 3 only
D
1, 2 and 3

Question 10Single Answer

Three identical amplifiers each having a voltage gain of 50 are cascaded. The open loop voltage gain of the combined amplifier is

A
71 dB
B
82 dB
C
91 dB
D
102 dB

Question 11Single Answer

If a square matrix of order 100 has exactly 15 distinct eigenvalues, then the degree of the minimum polynomial is

A
At least 15
B
At most 15
C
Always 15
D
Exactly 100

Question 12Single Answer

For high speed reading and storing of information in a computer, the core shall be of

A
Ferrite
B
Piezoelectric
C
Pyroelectric
D
Ferromagnetic above 768°C

Question 13Single Answer

Soft magnetic materials should have

A
Large saturation magnetization and large permeability
B
Low saturation magnetization and large permeability
C
Large saturation magnetization and low permeability
D
Low saturation magnetization and low permeability

Question 14Single Answer

Orbital magnetic moment of an electron, in an atom, is of the order of

A
0.1 Bohr magneton
B
1.0 Bohr magneton
C
10 Bohr magneton
D
100 Bohr magneton

Question 15Single Answer

When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a

A
Diamagnetic material
B
Ferrimagnetic material
C
Paramagnetic material
D
Antiferromagnetic material

Question 16Single Answer

What is the correct sequence of the following materials in ascending order of their resistivity ?
1. Iron
2. Silver
3. Constantan
4. Mica
5. Aluminium
Select the correct answer using the codes given below :

A
2, 5, 1, 3 and 4
B
4, 5, 3, 1 and 2
C
2, 3, 1, 5 and 4
D
4, 5, 1, 3 and 2

Question 17Single Answer

In the first Cauer network, with a pole at infinity, the first element must be

A
Series capacitor
B
Series inductor
C
Shunt capacitor
D
Shunt inductor

Question 18Single Answer

The total magnetic moment
1. is called saturation magnetization.
2. depends on the number of magnetic dipoles per unit volume, the instant electric current and the area of the current loop.
Which of the above statements is/are correct ?

A
1 only
B
2 only
C
Both 1 and 2
D
Neither 1 nor 2

Question 19Single Answer

Susceptibility of a diamagnetic material is 1. Negative
2. Positive
3. Dependent on the temperature
4. Independent of the temperature

A
1 and 2 only
B
1 and 3 only
C
2 and 3 only
D
1, 2 and 3

Question 20Single Answer

Superconductivity is a material property associated with

A
Changing shape by stretching
B
Stretching without breaking
C
A loss of thermal resistance
D
A loss of electrical resistance

Question 21Single Answer

Assuming both the voltage sources are in phase, the value of R for which maximum power is transferred from circuit A to circuit B is

A
0.8 Ω
B
1.4 Ω
C
2 Ω
D
2.8 Ω

Question 22Single Answer

For the intrinsic gallium-arsenide, the conductivity at room temperature 25°C is 10^-6 (ohm-m)^-1, the electron and hole nobilities are 0.85 m²/V-s and 0.04 m²/V-s respectively. What is the intrinsic carrier concentration at the room temperature?

A
7.0 × 10¹² m^-3
B
7.0 × 10^-12 m^-3
C
7.0 × 10^-12 m³
D
7.0 × 10¹² m³

Question 23Single Answer

The resistivity of intrinsic germanium at 30°C is 0.46 –m. What is the intrinsic carrier density at 30°C if the electron mobility is 0.38 m²/V-s and the hole mobility is 0.18 m²/V-s?

A
9.2 × 10⁵/m³
B
2.77 × 10³/m³
C
2.43 × 10¹⁹/m³
D
8.9 × 10¹²/m³

Question 24Single Answer

Heat conduction in a semiconductor takes place

A
By the mobility of the carriers
B
Due to energy gap between conduction band and valency band
C
By the holes and thermal vibrations of atoms
D
By the electrons and thermal vibrations of atoms

Question 25Single Answer

Brewster angle is the angle when a wave is incident on the surface of a perfect dielectric at which there is no reflected wave and the incident wave is

A
Parallel polarized
B
Perpendicularly polarized
C
Normally polarized
D
None of the above

Question 26Single Answer

An electrical breakdown of a p-n junction occurs if

A
Forward voltage increases up to the rating
B
Reverse voltage increases beyond the rating
C
Forward voltage decreases below the rating
D
Reverse voltage decreases below the rating

Question 27Single Answer

The chief deterrent to the widespread application of superconducting materials is

A
Very difficult to form, machine or case
B
The difficult in attaining and maintaining extremely low temperature
C
The poor strength-to-weight ratio
D
The lower oxidation rate at elevated temperatures

Question 28Single Answer

Which one of the following properties is not observed in the carbon nanotubes ?

A
High stiffness and strengths
B
Low densities
C
Unusual electrical property
D
Non-ductile

Question 29Single Answer

The evidence for the importance of electron-phonon interaction in super-conductors comes from

A
Meissner effect
B
Josephson effect
C
Isotope effect
D
x quantization experiments

Question 30Single Answer

Which one of the following materials is used for cable insulation ?

A
Phenol formaldehyde
B
Polytetrafluoroethylene
C
Polyvinyl chloride
D
Acrylonitrile butadiene styrene

Question 31Single Answer

At temperature of 298 Kelvin, Silicon is not suitable for most-electronic applications, due to small amount of conductivity. This can be altered by

A
Gettering
B
Doping
C
Squeezing
D
Sintering

Question 32Single Answer

By doping Germanium with Gallium, the types of semi-conductors formed are
1. N type
2. P type
3. Intrinsic
4. Extrinsic

A
1 and 4
B
2 and 4
C
1 and 3
D
2 and 3

Question 33Single Answer

An n-type of silicon can be formed by adding impurity of:
1. Phosphorous
2. Arsenic
3. Boron
4. Aluminum
Which of the above are correct ?

A
1 and 2
B
2 and 3
C
3 and 4
D
1 and 4

Question 34Single Answer

According to Einstein’s relationship for a semiconductor, the ratio of diffusion constant to the mobility of the charge carriers is

A
Variable and is twice the volt equivalent of the temperature
B
Constant and is equal to the volt equivalent of the temperature
C
Equal to two and is twice the volt equivalent of the temperature
D
Equal to one and is equal to the volt equivalent of the temperature

Question 35Single Answer

Swept-out voltage in PIN diode happens when PIN diode is

A
Forward biased and the thickness of the depletion layer decreases till I-region becomes free of mobile carriers
B
Reverse biased and the thickness of the depletion layer increases till I-region becomes free of mobile carriers
C
Forward biased and the thickness of the depletion layer increases till I-region becomes free of mobile carriers
D
Reverse biased and the thickness of the depletion layer decreases till I-region becomes free of mobile carriers

Question 36Single Answer

Resistance switching is normally resorted in case of

A
Air blast CB
B
Bulk oil CB
C
Minimum oil CB
D
All types of CB

Question 37Single Answer

By transmitting power at high voltage

A
it will give poor voltage regulation
B
it will give better voltage regulation
C
it will not effect voltage regulation
D
None of these

Question 38Single Answer

Which statement about the daily load curve is valid ?

A
The area under the curve gives the average demand
B
The ratio of the area under the curves to the total area of rectangle in which it is contained gives the load factor for the day
C
The peak of the curve gives the installed capacity of the plant
D
The area of the curves divided by the number of hours gives load factor

Question 39Single Answer

High voltage Schring bridge is used to measure

A
large capacitance without additional element
B
small capacitance without additional element
C
medium value capacitance
D
None of these

Question 40Single Answer

Draw - in - system of laying underground cables has the drawback (s) of

A
higher cost
B
reduced current carrying capacity of the cables
C
requirements of much deeper and wider trenches
D
repairs, alterations or additions difficult
E
all of the above except

Question 41Single Answer

Surge impedance of a transmission line is

A
independent of its length
B
dependent on its length
C
independent on its temperature
D
none of the above

Question 42Single Answer

If two synchronous generators connected in parallel loose synchronism, it will lead to

A
stalling of generators
B
wild fluctuations in current
C
wild fluctuations in current and voltage
D
None of these

Question 43Single Answer

A differential relay responds to

A
algebraic difference of two or more similar electrical quantities
B
vector difference of two or more similar electrical quantities
C
algebraic difference between two currents
D
algebraic difference between two voltages

Question 44Single Answer

The conductor carries more current on the surface in comparison to its core. This phenomenon is called the

A
Skin effect
B
Corona
C
Ferranti effect
D
Lenz's effect

Question 45Single Answer

A booster is connected in

A
series with the feeder
B
parallel with the feeder
C
both (a) and (b) are correct
D
none of these

Question 46Single Answer

What is the primary focus of electronics?

A
Only electrical systems
B
The study of circuits and devices that control the flow of electrons
C
Only mechanical devices
D
Fluid mechanics

Question 47Single Answer

Which of the following is NOT a field in which electronics is used?

A
Communications
B
Medical technology
C
Textiles
D
Automation

Question 48Single Answer

Which of the following devices is used to control the flow of current in an electronic circuit?

A
Resistor
B
Capacitor
C
Diode
D
Transistor

Question 49Single Answer

What is the significance of semiconductors in electronics?

A
They conduct electricity only in specific conditions
B
They are perfect conductors of electricity
C
They do not conduct electricity at all
D
They act as insulators

Question 50Single Answer

Which electronic component is primarily used to store energy in an electric field?

A
Resistor
B
Capacitor
C
Inductor
D
Diode

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Electrician/Lineman Trade

Question 51Single Answer

Which of the following is an example of a passive component in electronics?

A
Transistor
B
Diode
C
Capacitor
D
Integrated circuit

Question 52Single Answer

What is the role of diodes in electronic circuits?

A
To amplify signals
B
To store electrical energy
C
To allow current to flow in one direction only
D
To generate alternating current

Question 53Single Answer

What is the primary function of an integrated circuit (IC)?

A
To resist electrical flow
B
To amplify signals
C
To combine multiple components into a single package
D
To store energy

Question 54Single Answer

In electronics, what does the term “power” generally refer to?

A
The amount of current in a circuit
B
The energy consumed by a device per unit time
C
The resistance in a circuit
D
The voltage difference across a component

Question 55Single Answer

Which of the following is a key principle in electronics?

A
Voltage is constant across all components
B
Resistance always increases in parallel circuits
C
The flow of current is opposed by resistors
D
Capacitors resist voltage changes

Question 56Single Answer

What is the primary purpose of Kirchhoff's Current Law (KCL)?

A
To ensure conservation of charge at a node
B
To calculate voltage drops
C
To determine power dissipation
D
To analyze resonance

Question 57Single Answer

In a circuit with three resistors in series, each of 5 Ω, what is the equivalent resistance?

A
5 Ω
B
15 Ω
C
67 Ω
D
10 Ω

Question 58Single Answer

What is the voltage across a 10 Ω resistor carrying a current of 2 A?

A
5 V
B
10 V
C
20 V
D
40 V

Question 59Single Answer

Which analysis technique uses loop currents as variables to solve a circuit?

A
Nodal analysis
B
Mesh analysis
C
Superposition theorem
D
Thevenin’s theorem

Question 60Single Answer

The Superposition theorem is applicable to:

A
Non-linear circuits
B
Linear bilateral circuits
C
Unilateral circuits
D
Time-varying circuits

Question 61Single Answer

Thevenin’s theorem converts a complex circuit into:

A
A single current source and parallel resistance
B
A single resistor
C
A single voltage source and series resistance
D
A single capacitor

Question 62Single Answer

For maximum power transfer, the load resistance should be:

A
Half of the source resistance
B
Equal to the source resistance
C
Twice the source resistance
D
Zero

Question 63Single Answer

Norton’s theorem is the dual of:

A
Thevenin’s theorem
B
Superposition theorem
C
Millman’s theorem
D
Reciprocity theorem

Question 64Single Answer

Millman’s theorem is used to find:

A
Equivalent resistance
B
Current through a resistor
C
Voltage across parallel branches
D
Power dissipation

Question 65Single Answer

Tellegen’s theorem is based on:

A
Conservation of energy
B
Conservation of charge
C
Maximum power transfer
D
Resonance

Question 66Single Answer

What is the basis of energy balance in electromechanical systems?

A
Input Energy = Output Energy
B
Input Energy = Mechanical Work + Stored Energy + Losses
C
Input Energy = Stored Energy Only
D
Input Energy = Losses Only

Question 67Single Answer

What is the primary coupling field in rotating machines?

A
Electric field
B
Magnetic field
C
Gravitational field
D
Thermal field

Question 68Single Answer

What is a condition for electromechanical energy conversion?

A
Static magnetic field only
B
Mechanical motion and electrical current
C
High temperature
D
Low voltage

Question 69Single Answer

How is energy stored in a magnetic field calculated?

A
( W_m = Li² )
B
( W_m = frac{1}{2}Li² )
C
( W_m = Psi i )
D
( W_m = frac{1}{2}Psi² )

Question 70Single Answer

What is co-energy in a magnetic system?

A
( W_m' = int Psi di )
B
( W_m' = frac{1}{2}Li^² )
C
( W_m' = Psi i )
D
( W_m' = frac{1}{2}Psi² )

Question 71Single Answer

How is force derived from stored energy at constant current?

A
( F = -frac{partial W_m(x,i)}{partial x} )
B
( F = +frac{partial W_m(x,i)}{partial x} )
C
( F = -frac{partial W_m'(x,Psi)}{partial x} )
D
( F = +frac{partial W_m'(x,Psi)}{partial x} )

Question 72Single Answer

What produces reluctance torque?

A
Maximum flux linkage
B
Minimum reluctance path alignment
C
High voltage
D
Low current

Question 73Single Answer

What characterizes a singly excited system?

A
Two electrical inputs
B
One electrical input
C
No electrical input
D
Multiple mechanical inputs

Question 74Single Answer

Which machine is an example of a doubly excited system?

A
Reluctance motor
B
Capacitor motor
C
Electromagnet
D
Synchronous machine

Question 75Single Answer

What causes transformer EMF?

A
Conductor motion
B
Time-varying flux
C
Constant flux
D
Mechanical work

General Knowledge

Question 76Single Answer

Which ancient city in Madhya Pradesh was a significant cultural and political center during the Maurya and Gupta periods?

A
Indore
B
Bhopal
C
Ujjain
D
Gwalior

Question 77Single Answer

The Parmar dynasty was primarily associated with which region of Madhya Pradesh?

A
Bundelkhand
B
Malwa
C
Baghelkhand
D
Mahakoshal

Question 78Single Answer

The famous temples of Khajuraho were built by which dynasty?

A
Parmar
B
Gupta
C
Chandela
D
Maurya

Question 79Single Answer

What major infrastructure decision was approved by the MP Cabinet on June 10, 2025?

A
Construction of new airports
B
Connecting 20,600 remote settlements to main roads
C
Expansion of metro lines
D
Development of new dams

Question 80Single Answer

What is the estimated cost for connecting 20,600 remote settlements in MP?

A
Rs.21,630 crore
B
Rs.15,000 crore
C
Rs.25,000 crore
D
Rs.30,000 crore

Reasoning

Question 81Single Answer

How many such pairs of letters are there in the word ‘CLEANLINESS’ each of the which has as many letters between them in the word as they have in the English alphabet, in the same sequence?

A
Two
B
Three
C
Five
D
Four
E
None of these

Question 82Single Answer

Team A has scored more goals than Team B
Team C has scored fewer goals than Team B
Team A has scored fewer goals than Team C .
If the first two statements are true, the third statement is

A
True
B
False
C
Uncertain
D
None

Question 83Single Answer

If it is possible to make only one meaningful word with the second, the third, the sixth and the eight letters of the word FRAGMENT using each only once, which of the following will be the third letter of that word ? If no such word can be formed, give ‘X’ as the answer and if more than one such word can be formed, give ‘Y’ as the answer.

Question 84Single Answer

How many such letters are there in the word ORIENTAL each of which is as far away from the beginning of the word as when they are arranged alphabetically?

A
None
B
One
C
Two
D
Three
E
More than three

Question 85Single Answer

How many such pairs of letters in the word CREDIT each of which has as many letters between them in the word as in the English alphabet?

A
None
B
One
C
Two
D
Three
E
More than three

Question 86Single Answer

Passage :

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z .

Which letter in this alphabet is the eighth letter to the right of the letter and which is tenth letter to the left of the last but one letter of the alphabet ?

Question 87Single Answer

Passage :

Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)

If the third alphabet of each of the words is changed to the next alphabet in the English alphabetical series, which of the following will form a meaningful English word?

A
SUM
B
BIG
C
Both BIG and THE
D
FOR
E
Both FOR and BIG

Question 88Single Answer

Passage :

Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)

If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be second from the right ?

A
AND
B
FOR
C
THE
D
BIG
E
SUM

Question 89Single Answer

Passage :

Direction: The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)

If second alphabet in each of the words is changed to next alphabet in the English alphabetical order, how many words having two vowels (same or different vowels) will be formed ?

A
None
B
One
C
Two
D
Three
E
Four

Question 90Single Answer

Passage :

How many letters are there in the English alphabetical series between the second letter of the word which is second from the right and the second letter of the word which is second from the left of the given words?

A
Two
B
Five
C
Six
D
Nine
E
Three

Quantitative Aptitude

Question 91Single Answer

The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?

A
51:52
B
52:53
C
51:53
D
52:55

Question 92Single Answer

Which of the following numbers is irrational ?

A
√49
B
0.125
C
√2
D
22/7

Question 93Single Answer

356 x 936 – 356 x 836 = ?

A
35600
B
34500
C
9630
D
93600

Question 94Single Answer

Arrange in descending order: 5/8, 7/10, 3/4

A
3/4 > 7/10 > 5/8
B
7/10 > 3/4 > 5/8
C
3/4 > 5/8 > 7/10
D
5/8 > 7/10 > 3/4

Question 95Single Answer

What is (3^{^}{4} times 9^{^}{2}) ?

A
3⁶
B
3⁸
C
3¹⁰
D
9⁶

Question 96Single Answer

Passage :

information given below and answer the question that follow.
The result of an exam is given below. Out of 1000 students who appeared
(i) 658 failed in Physics
(ii) 166 failed in Physics and Chemistry
(iii) 372 failed in Chemistry, 434 failed in Physics and Maths
(iv) 590 failed in Maths, 126 failed in Maths & Chemistry
Find the number of people who failed in (assuming that none is passed in all subjects.

We have the following equations:
a+ b + c + d + e + f + g = 1000
a + b + d + e = 658, b + d = 166
b + d + c + f = 372
d + e = 434 as in the figure.
d + e + f + g = 590, d + f = 126. Find the values

Chemistry but not in Physics.

A
318
B
198
C
213
D
206

Question 97Single Answer

Passage :

Direction: information given below and answer the question that follow.
The result of an exam is given below. Out of 1000 students who appeared
(i) 658 failed in Physics
(ii) 166 failed in Physics and Chemistry
(iii) 372 failed in Chemistry, 434 failed in Physics and Maths
(iv) 590 failed in Maths, 126 failed in Maths & Chemistry
Find the number of people who failed in (assuming that none is passed in all subjects.

We have the following equations:
a+ b + c + d + e + f + g = 1000
a + b + d + e = 658, b + d = 166
b + d + c + f = 372
d + e = 434 as in the figure.
d + e + f + g = 590, d + f = 126. Find the values

Physics or Maths but not in Chemistry.

A
558
B
718
C
628
D
None of these

Question 98Single Answer

Passage :

For the next four question that follow:
In a city, three daily newspapers A, B, C are published, 42% read A; 51% read B; 68% read C; 30% read A and B; 28% read B and C; 36% read A and C; 8% do not read any of the three newspapers.

Let x% people read all the three newspapers.
Since 8% people do not read any newspapers.
(x – 24) + (x – 7) + (x + 4) + (30 – x) + (36 – x) + (28 – x) + x = 92
→ x + 98 – 31 = 92
→ x = 92 – 67 = 25

What is the percentage of persons who read all the three papers ?

A
20%
B
25%
C
30%
D
40%

Question 99Single Answer

Passage :

For the next four : question that follow :
In a city, three daily newspapers A, B, C are published, 42% read A; 51% read B; 68% read C; 30% read A and B; 28% read B and C; 36% read A and C; 8% do not read any of the three newspapers.

What is the percentage of persons who read only two papers?

A
19%
B
31%
C
44%
D
None of these

Question 100Single Answer

Passage :

What is the percentage of persons who read only one paper ?

A
38%
B
48%
C
51%
D
None of these

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Latest MPTRANSCO Substation Attendant Exam Question (Objective Questions), MCQ in English

Electrician/Lineman Trade

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Electrician/Lineman Trade

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