Question for RRB ALP Electrical 2026 - Quiz / Questions / MCQ

Objective Questions

Latest RRB ALP Electrical Exam Question (Objective Questions), MCQ in English

Subjects : Mathematics, General Intelligence and Reasoning, Basic Science & Engineering, Electrical

Question Bank RRB ALP Electrical Exam (CBT Stage 2) - English

Mathematics

Question 1Single 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 2Single Answer

Which of the following numbers is irrational ?

A
√49
B
0.125
C
√2
D
22/7

Question 3Single Answer

356 x 936 – 356 x 836 = ?

A
35600
B
34500
C
9630
D
93600

Question 4Single 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 5Single Answer

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

A
3⁶
B
3⁸
C
3¹⁰
D
9⁶

Question 6Single Answer

If 3⁴X^-2 = 729, then find the value of X.

Question 7Single Answer

Convert 0.6 into fraction ?

A
3/5
B
2/3
C
4/5

Question 8Single Answer

The no. plate of a bus had peculiarity. The bus number was a perfect square. It was also a perfect square when the plate numbers were reversed. The bus company had only five hundred buses numbered from 1 to 500. What was the number ?

A
169
B
36
C
196
D
Can not say

Question 9Single Answer

If a and b are positive integers, such that ab = 125, then (a-b)^a+b-4= ?

A
16
B
25
C
28
D
30

Question 10Single Answer

If x^*y = x² + y² – xy, then value of 9^*11 is

A
93
B
103
C
60.5
D
121

Question 11Single Answer

The elements of the set {x : x is an integer, x² : 4} can be represent as .....Z..... . Here, Z refers to

A
{–2, 2}
B
{–1, 0, 1}
C
{–2, –1, 0, 1, 2}
D
{0, 1, 2}

Question 12Single Answer

A
B
C
D
None of these

Question 13Single Answer

If Y = {x : x is a positive factor of the number 2p – 1(2p – 1), where 2p – 1 is a prime number}, then Y can be represent in roster form as

A
{2}
B
{1, 2}
C
{1, 2, 22, ....., 2p – 1}
D
{1, 2, 22, 23,.... 2p – 1, (2p – 1)}

Question 14Single Answer

The set {x : x is a positive integer less than 6 and 3x – 1 is an even number} in roster form is

A
{1, 2, 3, 4, 5}
B
{1, 2, 3, 4, 5, 6}
C
{2, 4, 6}
D
{1, 3, 5}

Question 15Single Answer

If A

B and A

B, then

A
A is called a proper subset of B
B
A is called a super set of B
C
A is not a subset of B
D
B is a subset of A

Question 16Single Answer

The number of non-empty subsets of the set{1, 2, 3, 4} is

A
15
B
14
C
16
D
17

Question 17Single Answer

The number of elements of the power set of a set containing m elements is

A
2^m – 1
B
m
C
m²
D
2^m

Question 18Single Answer

If A = {x : x = n², n = 1, 2, 3}, then number of proper subsets is

A
3
B
8
C
7
D
None of these

Question 19Single Answer

If A = {x : x = 4n + 1, 2 £ n £ 5},then number of subsets of A is

A
16
B
15
C
4
D
None of these

Question 20Single Answer

Let A and B be two non-empty subsets of a set X such that A is not a subset of B, then

A
A is always a subset of the complement of B
B
B is always a subset of A
C
A and B are always disjoint
D
A and the complement of B are always non-disjoint

Question 21Single Answer

Passage :

Direction : Each of the questions below consists of a question and two statements numbered (I) and (II) given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer :

How many employees of bank ‘X’ opted for VRS ?
(I) 18% of the 950 officer cadre employees and 6% of the 1100 of all other cadre employees opted for VRS.
(II) 28% of the employees in the age group of 51 to 56 and 17% of the employees in all other age groups opted for VRS.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 22Single Answer

Passage :

The area of a playground is 1600 square meters. What is its perimeter ?
(I) It is a perfect square playground
(II) It costs Rs.3200 to put a fence around the playground at the rate of Rs.20 per meter.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 23Single Answer

Passage :

What is the value of m – n ÷ 37 ?
(I) m is the largest possible six-digit number and n is the smallest possible six-digit number.
(II) The difference between m and n is known.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 24Single Answer

Passage :

What is the value of x ?
(I) If 10 is added to x, the result is 34.
(II) If x is multiplied by y, the result is 38.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 25Single Answer

Passage :

What was the total compound interest on a sum after three years ?
(I) The interest after one year was Rs. 100 and the sum after was Rs.1000.
(II) The difference between simple and compound interest on a sum of Rs.1000 at the end of two years was Rs.10.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

General Intelligence and Reasoning

Question 26Single 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 27Single 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 28Single 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 29Single 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 30Single 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

Question 31Single 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 in each of the given words, each of the consonant is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will no vowels appear?

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

Question 32Single Answer

Passage :

Direction : Following question is based on five words given below:
BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)

If the third alphabet in each of the words is changed to the 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 33Single Answer

Passage :

If the position of the first and the second alphabets of each of the words are interchanged, which of the following will form a meaningful English word?

A
Both CAT and OWN
B
Both BRU and INK
C
Only CAT
D
Only INK
E
Only LEG

Question 34Single Answer

Passage :

Direction: Following question is based on five words given below:
BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be 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 exactly in the middle of the five words?

A
OWN
B
LEG
C
BRU
D
CAT
E
INK

Question 35Single Answer

Passage :

Direction: Following question is based on five words given below:
BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)

If in each of the given words, each of the consonants is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will the same alphabet appear twice?

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

Question 36Single Answer

Passage :

Find the missing number in the following series ?

3, 5, 5, 19, 7, 41, 9, ?

A
71
B
61
C
79
D
69

Question 37Single Answer

Passage :

Direction: following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)

If the positions of the first and the third alphabets of each of the words are interchanged, which of the following would form meaningful words with the new arrangement?

A
HID
B
SON
C
Both LAP and BUT
D
CAR
E
Both CAR and LAP

Question 38Single Answer

Passage :

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 fourth from the left?

A
LAP
B
BUT
C
CAR
D
SON
E
HID

Question 39Single Answer

Passage :

Direction : following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)

If in each of given words, each of the consonants is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will at least one vowel appear?

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

Question 40Single Answer

Passage :

Direction : following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)

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

A
Two
B
Five
C
Six
D
Nine
E
Three

Question 41Single Answer

Passage :

If second alphabet in each of the words is changed to next alphabet in the English alphabetical order, how many words having no vowels will be formed?

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

Question 42Single Answer

Passage :

Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN
(Note: The words formed after performing the given operations may or may not be meaningful English words.)

If all the letters in each of the words are arranged alphabetically (within the word), how many words will remain unchanged?

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

Question 43Single Answer

Passage :

Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN
(Note: The words formed after performing the given operations may or may not be meaningful English words.)

According to the English alphabetical series how many letters are there between the first letter of the third word and the first letter of the fifth word?

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

Question 44Single Answer

Passage :

Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN
(Note: The words formed after performing the given operations may or may not be meaningful English words.)

If the first letter of all the words is changed to the previous letter of the English alphabetical series, how many words will have more than one vowel?

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

Question 45Single Answer

Passage :

Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN
(Note: The words formed after performing the given operations may or may not be meaningful English words.)

If all the vowels (in all the words) are changed to the next letter of the English alphabetical series, how many words will form meaningful English words?

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

Question 46Single Answer

Passage :

Direction : following letter are based on the five three letter words given below:
PIN ROD DEN SAT FUN
(Note: The words formed after performing the given operations may or may not be meaningful English words.)

If the positions of the first and last letters of all of the words are interchanged and then the words thus formed are arranged alphabetically form left to right, which of the following will be second from the left?

A
SAT
B
DEN
C
ROD
D
PIN
E
FUN

Question 47Single Answer

Passage :

Direction: Following question is based on the five three lettered words given below:
SHE AND TWO WIT GUM
(Note: The words formed after performing the given operations may or may not be meaningful English words)

If all the letters in each of the words are arranged in alphabetical order (within the word) how many words will remain unchanged?

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

Question 48Single Answer

Passage :

Direction: The following question is based on five words given below:
RAT ONE BUT AND SAW
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)

If in each of the given words each alphabet is changed to the next letter in the English alphabetical series, in how many words thus formed have the consonants changed to vowels?

A
One
B
Two
C
Three
D
Four
E
Five

Question 49Single Answer

Passage :

Direction : The following question is based on five words given below:
RAT ONE BUT AND SAW
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)

How many such pairs of the letters are there in the word highlighted in bold, each of which has as many letters between them in the word (in both forward and backward directions), as they have between them in the English alphabetical order?

A
None
B
One
C
Two
D
Three
E
Four

Question 50Single Answer

Passage :

If the first alphabet of each of the words is changed to the next alphabet in English alphabetical series, how many meaningful English words will be formed?

A
One
B
Two
C
Three
D
Four
E
Five

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Basic Science & Engineering

Question 51Single Answer

Which type of projection represents a 3D object on a 2D plane using multiple views?

A
Isometric projection
B
Orthographic projection
C
Perspective projection
D
Axonometric projection

Question 52Single Answer

In which projection are the three axes inclined at equal angles of 120°?

A
Orthographic projection
B
Isometric projection
C
Perspective projection
D
Oblique projection

Question 53Single Answer

Which projection is commonly used in architectural drawings to show depth and realism?

A
Orthographic projection
B
Isometric projection
C
Perspective projection
D
Sectional projection

Question 54Single Answer

What is the key characteristic of an orthographic projection?

A
It shows a 3D object in a single view
B
It requires multiple views to represent an object
C
It distorts proportions
D
It is only used for artistic drawings

Question 55Single Answer

In an isometric projection, how are the three principal axes oriented?

A
Perpendicular to each other
B
At 30° to the horizontal
C
At 45° to the vertical
D
Parallel to each other

Question 56Single Answer

The top view of an object is projected onto which plane?

A
Horizontal plane
B
Vertical plane
C
Profile plane
D
Perspective plane

Question 57Single Answer

The side view of an object is projected onto which plane?

A
Horizontal plane
B
Vertical plane
C
Profile plane
D
Isometric plane

Question 58Single Answer

Sectional views are used to:

A
Show the hidden details of an object
B
Reduce the complexity of a drawing
C
Remove unnecessary dimensions
D
Create artistic representations

Question 59Single Answer

The front view of an object is projected onto which plane?

A
Horizontal plane
B
Vertical plane
C
Profile plane
D
Oblique plane

Question 60Single Answer

Which type of sectional view is used to cut an object completely in half?

A
Half section
B
Full section
C
Partial section
D
Offset section

Question 61Single Answer

Which instrument is used to draw circles and arcs?

A
Protractor
B
Compass
C
Set square
D
Scale

Question 62Single Answer

A 30°-60° set square is used to draw angles of:

A
15° and 45°
B
30° and 60°
C
45° and 90°
D
15° and 75°

Question 63Single Answer

Which instrument is primarily used for measuring angles?

A
Compass
B
Protractor
C
Divider
D
Scale

Question 64Single Answer

Which instrument is used to measure and transfer distances?

A
Protractor
B
Compass
C
Divider
D
Set square

Question 65Single Answer

A T-square is commonly used for:

A
Drawing horizontal lines
B
Measuring angles
C
Drawing curves
D
Creating sectional views

Question 66Single Answer

A continuous thick line is used to represent:

A
Hidden details
B
Object outlines
C
Centerlines
D
Dimension lines

Question 67Single Answer

Dashed lines in engineering drawings represent:

A
Visible edges
B
Hidden details
C
Centerlines
D
Construction lines

Question 68Single Answer

Chain lines are typically used to represent:

A
Dimensions
B
Centerlines
C
Cutting planes
D
Hidden edges

Question 69Single Answer

Which type of line is used for dimensioning?

A
Dashed line
B
Thick solid line
C
Thin continuous line
D
Centerline

Question 70Single Answer

A centerline is represented by:

A
A continuous thick line
B
A chain-dotted line
C
A dashed thick line
D
A wavy line

Question 71Single Answer

A regular polygon has:

A
Equal sides and angles
B
Unequal sides
C
Only equal angles
D
Only equal sides

Question 72Single Answer

The sum of interior angles of a hexagon is:

A
360°
B
540°
C
720°
D
900°

Question 73Single Answer

A right triangle has:

A
Three equal sides
B
One angle equal to 90°
C
Two equal angles
D
No right angles

Question 74Single Answer

The number of sides in a pentagon is:

Question 75Single Answer

A square is a special type of:

A
Triangle
B
Pentagon
C
Parallelogram
D
Hexagon

Question 76Single Answer

Which instrument is commonly used to draw horizontal parallel lines on a drawing board?

A
T-square
B
Divider
C
Compass
D
Protractor

Question 77Single Answer

Which instrument is used to draw circles and arcs?

A
Divider
B
Compass
C
Scale
D
Set square

Question 78Single Answer

A divider is mainly used for:

A
Drawing circles
B
Measuring angles
C
Transferring distances
D
Drawing horizontal lines

Question 79Single Answer

Which instrument is used to measure or construct angles?

A
T-square
B
Divider
C
French curve
D
Protractor

Question 80Single Answer

Which set square is normally used for drawing 45° lines?

A
30°–60° set square
B
45° set square
C
15° set square
D
75° set square

Question 81Single Answer

The standard angles of a 30°–60° set square are:

A
30°, 60°, 90°
B
30°, 45°, 90°
C
45°, 60°, 90°
D
15°, 75°, 90°

Question 82Single Answer

In engineering drawing, visible outlines are normally represented by:

A
Thin continuous lines
B
Dashed lines
C
Thick continuous lines
D
Chain lines

Question 83Single Answer

Hidden edges in an engineering drawing are represented by:

A
Dashed lines
B
Continuous thick lines
C
Chain lines
D
Freehand lines

Question 84Single Answer

A centre line is generally represented by:

A
Thick continuous line
B
Thin chain line
C
Thick dashed line
D
Zigzag line

Question 85Single Answer

Dimension lines are normally drawn as:

A
Freehand lines
B
Thick continuous lines
C
Thick chain lines
D
Thin continuous lines

Question 86Single Answer

In orthographic projection, the view seen from above is called the:

A
Front view
B
Side view
C
Top view
D
Auxiliary view

Question 87Single Answer

The view obtained by looking directly at the front of an object is called the:

A
Plan
B
Side elevation
C
Front elevation
D
Sectional view

Question 88Single Answer

In engineering drawing, the top view is also known as the:

A
Elevation
B
Plan
C
Profile
D
Perspective

Question 89Single Answer

Orthographic projection generally represents an object using:

A
Artistic sketches
B
Only perspective views
C
Photographic images
D
Two-dimensional views

Question 90Single Answer

Which projection gives a pictorial representation of an object with three dimensions visible?

A
Isometric projection
B
Orthographic projection
C
First-angle projection
D
Sectional projection

Question 91Single Answer

The angle between any two isometric axes is:

A
120°
B
90°
C
60°
D
180°

Question 92Single Answer

A circle drawn in isometric projection generally appears as a/an:

A
Circle
B
Ellipse
C
Square
D
Triangle

Question 93Single Answer

A polygon having three sides is called a:

A
Pentagon
B
Hexagon
C
Quadrilateral
D
Triangle

Question 94Single Answer

A polygon having five sides is called a:

A
Octagon
B
Hexagon
C
Heptagon
D
Pentagon

Question 95Single Answer

A regular hexagon has:

A
4 sides
B
5 sides
C
6 sides
D
8 sides

Question 96Single Answer

What is the SI unit of length?

A
Centimetre
B
Foot
C
Metre
D
Inch

Question 97Single Answer

What is the SI unit of mass?

A
Gram
B
Kilogram
C
Pound
D
Tonne

Question 98Single Answer

What is the SI unit of time?

A
Second
B
Hour
C
Minute
D
Day

Question 99Single Answer

The SI unit of force is:

A
Newton
B
Joule
C
Watt
D
Pascal

Question 100Single Answer

The SI unit of work is:

A
Watt
B
Joule
C
Newton
D
Ampere

Electrical

Question 101Single Answer

What is the standard frequency of AC supply in India?

A
50 Hz
B
25 Hz
C
60 Hz
D
100 Hz

Question 102Single Answer

The nominal single-phase supply voltage in India is approximately:

A
230 V
B
180 V
C
110 V
D
440 V

Question 103Single Answer

The nominal voltage between two phases of a three-phase low-voltage supply in India is approximately:

A
110 V
B
415 V
C
230 V
D
660 V

Question 104Single Answer

Which organization specifies many electrical standards in India?

A
BIS
B
RBI
C
ISRO
D
DRDO

Question 105Single Answer

BIS stands for:

A
Bureau of Indian Standards
B
Board of Indian Supply
C
Basic Indian System
D
Bureau of Industrial Supply

Question 106Single Answer

Electrical energy consumed by a domestic consumer is generally measured in:

A
Kilowatt-hour
B
Volt
C
Watt
D
Ampere

Question 107Single Answer

One unit of electrical energy is equal to:

A
1 W
B
1 kW
C
1 Wh
D
1 kWh

Question 108Single Answer

One kilowatt-hour is equal to:

A
3.6 × 10³ J
B
3.6 × 10⁶ J
C
3.6 × 10⁵ J
D
3.6 × 10⁴ J

Question 109Single Answer

The main purpose of earthing in an electrical installation is to:

A
Protect against electric shock
B
Increase current
C
Increase voltage
D
Increase power factor

Question 110Single Answer

Which wire is normally connected to the metallic body of an electrical appliance?

A
Phase wire
B
Earth wire
C
Neutral wire
D
Fuse wire

Question 111Single Answer

A fuse is mainly used for protection against:

A
Low voltage
B
Low frequency
C
Overcurrent
D
High power factor

Question 112Single Answer

MCB stands for:

A
Main Control Board
B
Miniature Circuit Breaker
C
Motor Circuit Box
D
Maximum Current Breaker

Question 113Single Answer

RCCB is mainly used for protection against:

A
High frequency
B
Earth leakage
C
Low power factor
D
Mechanical damage

Question 114Single Answer

The neutral conductor in a single-phase system normally carries:

A
Only fault current
B
No current
C
Double load current
D
Load current

Question 115Single Answer

The conventional direction of current in an external circuit is from:

A
Positive to negative
B
Negative to positive
C
Earth to neutral
D
Neutral to phase

Question 116Single Answer

Which device measures electrical energy consumption?

A
Energy meter
B
Voltmeter
C
Ammeter
D
Wattmeter only

Question 117Single Answer

The commercial unit of electrical energy is:

A
Joule
B
Kilowatt-hour
C
Watt
D
Ampere-hour

Question 118Single Answer

A distribution transformer is generally installed near consumers to:

A
Increase frequency
B
Increase current frequency
C
Step down voltage
D
Convert AC into DC

Question 119Single Answer

Transmission of electrical power at high voltage helps to:

A
Increase line loss
B
Reduce line loss
C
Increase conductor heating
D
Reduce frequency

Question 120Single Answer

Transmission loss in a conductor is proportional to:

A
I
B
I²
C
1/I
D
√I

Question 121Single Answer

Which material is most commonly used for electrical wiring?

A
Wood
B
Copper
C
Glass
D
Rubber

Question 122Single Answer

Copper is widely used as a conductor because it has:

A
High conductivity
B
Low conductivity
C
High resistance
D
High brittleness

Question 123Single Answer

Aluminium conductors are widely used in overhead lines mainly because they are:

A
Very heavy
B
Insulators
C
Lightweight and economical
D
Magnetic

Question 124Single Answer

The function of insulation on a wire is to:

A
Increase current
B
Increase frequency
C
Generate voltage
D
Prevent leakage and electric shock

Question 125Single Answer

PVC stands for:

A
Polyvinyl Chloride
B
Poly Voltage Conductor
C
Power Vinyl Cable
D
Plastic Voltage Core

Question 126Single Answer

Which of the following is an insulating material?

A
PVC
B
Aluminium
C
Copper
D
Silver

Question 127Single Answer

The resistance of a conductor increases when its length:

A
Decreases
B
Becomes zero
C
Increases
D
Remains unchanged

Question 128Single Answer

Resistance of a conductor is inversely proportional to its:

A
Length
B
Resistivity
C
Temperature only
D
Cross-sectional area

Question 129Single Answer

The resistance of a conductor is given by:

A
R = ρA/L
B
R = L/ρA
C
R = LA/ρ
D
R = ρL/A

Question 130Single Answer

The SI unit of resistivity is:

A
Ω
B
W/m
C
S/m
D
Ω·m

Question 131Single Answer

Flexible cords normally contain:

A
One solid thick conductor
B
Several fine strands
C
No conductor
D
Carbon rods

Question 132Single Answer

Stranded conductors are preferred where:

A
Rigidity is required
B
High insulation resistance is unwanted
C
No current flows
D
Flexibility is required

Question 133Single Answer

Cable size is commonly specified according to its:

A
Cross-sectional area
B
Length only
C
Colour only
D
Weight only

Question 134Single Answer

A 2.5 mm² cable refers primarily to the:

A
Cable length
B
Diameter of the conduit
C
Insulation thickness
D
Conductor cross-sectional area

Question 135Single Answer

Which cable is commonly used for domestic wiring?

A
PVC insulated copper cable
B
Bare steel wire
C
Nichrome wire
D
Fuse wire

Question 136Single Answer

Which material has the highest conductivity among the following?

A
Copper
B
Nichrome
C
Iron
D
Silver

Question 137Single Answer

Nichrome wire is commonly used in:

A
Heating elements
B
Earthing conductors
C
Transmission lines
D
Motor shafts

Question 138Single Answer

Nichrome is used for heating elements because it has:

A
Very low resistance
B
High resistivity
C
Zero resistance
D
Very low melting point

Question 139Single Answer

A cable designed to carry multiple conductors is called a:

A
Zero-core cable
B
Fuse cable
C
Magnetic cable
D
Multicore cable

Question 140Single Answer

The outermost protective layer of a cable is generally called the:

A
Sheath
B
Core
C
Armature
D
Commutator

Question 141Single Answer

The SI unit of electric current is:

A
Volt
B
Ampere
C
Ohm
D
Watt

Question 142Single Answer

The SI unit of voltage is:

A
Ampere
B
Ohm
C
Volt
D
Watt

Question 143Single Answer

The SI unit of resistance is:

A
Ampere
B
Volt
C
Ohm
D
Coulomb

Question 144Single Answer

The SI unit of electrical power is:

A
Joule
B
Coulomb
C
Watt
D
Ohm

Question 145Single Answer

Ohm's law is expressed as:

A
R = VI
B
V = I/R
C
V = IR
D
I = VR

Question 146Single Answer

If voltage is 20 V and resistance is 10 Ω, the current is:

A
0.5 A
B
10 A
C
2 A
D
200 A

Question 147Single Answer

If 5 A current flows through a 4 Ω resistor, the voltage is:

A
1.25 V
B
9 V
C
25 V
D
20 V

Question 148Single Answer

Electrical power in a DC circuit is:

A
P = VI
B
P = V/I
C
P = I/V
D
P = R/V

Question 149Single Answer

A 230 V appliance drawing 2 A consumes approximately:

A
115 W
B
460 W
C
230 W
D
920 W

Question 150Single Answer

For resistors connected in series, the same quantity through each resistor is:

A
Voltage
B
Current
C
Power
D
Resistance

Question 151Single Answer

In a parallel circuit, the same quantity across all branches is:

A
Current
B
Power
C
Resistance
D
Voltage

Question 152Single Answer

The total resistance of resistors connected in series is:

A
Sum of resistances
B
Product of resistances
C
Difference of resistances
D
Always zero

Question 153Single Answer

Two 5 Ω resistors connected in series have a total resistance of:

A
2.5 Ω
B
5 Ω
C
25 Ω
D
10 Ω

Question 154Single Answer

Two identical 10 Ω resistors connected in parallel have equivalent resistance:

A
100 Ω
B
10 Ω
C
20 Ω
D
5 Ω

Question 155Single Answer

Kirchhoff's Current Law is based on conservation of:

A
Energy
B
Charge
C
Momentum
D
Mass only

Question 156Single Answer

Kirchhoff's Voltage Law is based on conservation of:

A
Resistance
B
Charge only
C
Energy
D
Current

Question 157Single Answer

An ammeter is connected in:

A
Series
B
Parallel
C
Both series and parallel simultaneously
D
Open circuit

Question 158Single Answer

A voltmeter is connected in:

A
Series
B
Parallel
C
Short circuit
D
Earth only

Question 159Single Answer

An ideal ammeter has:

A
Zero resistance
B
Infinite resistance
C
Very high voltage
D
Infinite inductance

Question 160Single Answer

An ideal voltmeter has:

A
Zero resistance
B
Infinite current
C
Zero voltage
D
Infinite resistance

Question 161Single Answer

Direct current flows:

A
Periodically in both directions
B
Without voltage
C
In one direction
D
Only through insulators

Question 162Single Answer

Alternating current:

A
Never changes direction
B
Has zero frequency
C
Changes magnitude and direction periodically
D
Cannot flow through wires

Question 163Single Answer

The time taken to complete one AC cycle is known as:

A
Frequency
B
Power factor
C
Phase
D
Period

Question 164Single Answer

The relationship between frequency f and time period T is:

A
f = T
B
f = T²
C
f = 1/T
D
f = 2T

Question 165Single Answer

At 50 Hz, the time period of one cycle is:

A
0.02 s
B
0.2 s
C
2 s
D
50 s

Question 166Single Answer

The RMS value of a sinusoidal AC voltage with peak value Vₘ is:

A
Vₘ
B
Vₘ/2π
C
√2Vₘ
D
Vₘ/√2

Question 167Single Answer

The peak value corresponding to 230 V RMS is approximately:

A
115 V
B
230 V
C
325 V
D
460 V

Question 168Single Answer

Power factor of a purely resistive AC circuit is:

A
1
B
0.5
C
0
D
2

Question 169Single Answer

In a purely inductive AC circuit, current:

A
Lags voltage by 90°
B
Leads voltage by 90°
C
Is in phase with voltage
D
Is always zero

Question 170Single Answer

In a purely capacitive AC circuit, current:

A
Lags voltage by 90°
B
Leads voltage by 90°
C
Is in phase with voltage
D
Has zero frequency

Question 171Single Answer

A switch should normally be connected in the:

A
Phase wire
B
Earth wire
C
Neutral wire
D
Both neutral and earth only

Question 172Single Answer

The purpose of a switch is to:

A
Measure voltage
B
Open or close a circuit
C
Increase frequency
D
Generate power

Question 173Single Answer

SPST stands for:

A
Series Pole Series Throw
B
Single Phase Single Terminal
C
Standard Pole Switching Terminal
D
Single Pole Single Throw

Question 174Single Answer

SPDT stands for:

A
Single Power Double Transformer
B
Single Phase Double Terminal
C
Series Pole Double Throw
D
Single Pole Double Throw

Question 175Single Answer

A two-way switch is commonly used in:

A
Earthing electrodes
B
Motor rewinding only
C
Transformer oil testing
D
Staircase wiring

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