Search Previous Year Questions

Find real questions from previous competitive exam papers with answers and solutions.

Leave the keyword blank to browse saved questions for your selected exam, newest papers first. Add a keyword, year or topic to narrow the results.

Browse complete papers
Showing 10 question(s)
Clear

Question 171

RPF SI 2022• CBT

The potential difference across a copper wire is 5.0 V when a current of 0.5 A flows through it. The resistance of the wire is:

  1. AOption (a)

    10.0 Ω

  2. BOption (b)

    2.5 Ω

  3. COption (c)

    0.1 Ω

  4. DOption (d)

    5.0 Ω

View answer & explanation

Correct answer

Answer: (a)A.

10.0 Ω

Why this answer is correct

The correct answer is 10.0 Ω.

Key Points

  • The formula for calculating resistance is R = V/I, where V is the potential difference and I is the current flowing through the wire.
  • Plugging in the given values, R = 5.0 V / 0.5 A = 10.0 Ω.
  • Therefore, the correct answer is 10.0 Ω.
  • Copper wire is a good conductor of electricity due to its high electrical conductivity and low resistivity.

Additional Information

  • The difference in charge carrier energy between two places in a circuit is known as the potential difference.
  • The ease with which an electric current can pass through a material is measured by its electrical conductivity.
  • The amount of obstruction to current passage in an electrical circuit is measured as resistance.

Question 172

RPF SI 2022• CBT

Which institution is the country's premier organisation for literary discourse, publication and promotion, and the only one that does so in 24 Indian languages, including English?

  1. AOption (a)

    English and Foreign Languages University

  2. BOption (b)

    Sahitya Akademi

  3. COption (c)

    Hindi Granth Academy

  4. DOption (d)

    Indira Gandhi National Open University

View answer & explanation

Correct answer

Answer: (b)B.

Sahitya Akademi

Why this answer is correct

The correct answer is Sahitya Akademi.

Key Points

  • Sahitya Akademi was established in 1954 by the Government of India to promote and preserve literature in Indian languages.
  • It has its headquarters in New Delhi and regional offices in different parts of the country.
  • Sahitya Akademi organizes literary events, awards, and fellowships to recognize and encourage writers in different languages.
  • The organization also publishes books in various Indian languages, including translations of works from other languages.

Additional Information

  • English and Foreign Languages University is located in Hyderabad.
  • It offers courses in English and foreign languages.
  • Hindi Granth Academy is based in Uttar Pradesh.
  • It is dedicated to promoting Hindi literature.
  • Indira Gandhi National Open University is located in New Delhi.
  • It offers distance education programs.

Question 173

RPF SI 2022• CBT

Refer to the following letter, number, symbol series and answer the question.

(Left) K & ^ 5 T & B 4 @ 3 # 1 A 3 P H 9 L % 9 2 (Right)

If all letters are dropped from the series, which of the following will be fifth from the left?

  1. AOption (a)

    &

  2. BOption (b)

    4

  3. COption (c)

    3

  4. DOption (d)

View answer & explanation

Correct answer

Answer: (b)B.

4

Why this answer is correct

Given terms: (Left) K & ^ 5 T & B 4 @ 3 # 1 A 3 P H 9 L % 9 2 (Right)

If all the letters are dropped from the series then the arrangements are:

(Left) & ^ 5 & 4 @ 3 # 1 3 9 % 9 2 (Right)

Here,

Fifth from the Left end is: 4.

Hence, the correct answer is "Option 2".

Question 174

RPF SI 2022• CBT

A, B, C, D, E, F, G and H are sitting around a square table facing the centre of the table. Some of them are sitting at the corners, while some are sitting at the middle of the sides. D sits third to the left of F. D sits at one of the corners. C sits second to the right of A. A does not sit at any of the corners. A is not an immediate neighbour of D. G is an immediate neighbour of E. G does not sit at any of the middle of the sides. Only three people sit between G and B.

Who sits second to the right of H?

  1. AOption (a)

    E

  2. BOption (b)

    G

  3. COption (c)

    C

  4. DOption (d)

    B

View answer & explanation

Correct answer

Answer: (d)D.

B

Why this answer is correct

Given: A, B, C, D, E, F, G and H are sitting around a square table facing the centre of the table.

Some of them are sitting at the corners, while some are sitting at the middle of the sides.

  1. D sits third to the left of F. D sits at one of the corners.

  2. C sits second to the right of A. A does not sit at any of the corners.

  3. A is not an immediate neighbour of D.

  4. G is an immediate neighbour of E.

  5. G does not sit at any of the middle of the sides.

  6. Only three people sit between G and B.

And, H will sit on the remaining place.

Here, 'B' sits second to the right of H.

Hence, the correct answer is "Option 4".

Question 175

RPF SI 2022• CBT

When acetic acid is treated with sodium hydroxide, then _______ and water will be formed.

  1. AOption (a)

    sodium bicarbonate

  2. BOption (b)

    sodium acetate

  3. COption (c)

    sodium carbonate

  4. DOption (d)

    lactic acid

View answer & explanation

Correct answer

Answer: (b)B.

sodium acetate

Why this answer is correct

The correct answer is sodium acetate.

Key Points

  • When acetic acid is treated with sodium hydroxide, it undergoes a neutralization reaction to form sodium acetate and water.
  • Sodium acetate is a salt that is commonly used in the textile industry for dyeing and printing fabrics.
  • Acetic acid is a weak organic acid that is commonly found in vinegar and used in food preservation and cooking.

Additional Information

  • Sodium bicarbonate is produced when sodium carbonate reacts with carbon dioxide and water.
  • Sodium bicarbonate is commonly known as baking soda and is used as a leavening agent in baking, as well as for cleaning and deodorizing.
  • Sodium carbonate requires a stronger acid to react with sodium hydroxide.
  • Sodium carbonate is commonly known as washing soda and is used as a water softener and in the production of glass, detergents, and paper.
  • Lactic acid is a different organic acid that does not react with sodium hydroxide to form a salt.
  • Lactic acid is a weak organic acid that is produced by the muscles during exercise and is also found in sour milk and some fruits.
  • It is used in the food and beverage industry as a flavoring agent and preservative.

Question 176

RPF SI 2022• CBT

Three statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:

I. All grounds are plane.

II. Some planes are covered.

III. All covered are wets.

Conclusions:

I. Some wets are plane.

II. Some wets are grounds.

III. Some planes are grounds.

  1. AOption (a)

    Conclusions I, II and III follow

  2. BOption (b)

    Conclusions II and III follow

  3. COption (c)

    Conclusions I and II follow

  4. DOption (d)

    Conclusions I and III follow.

View answer & explanation

Correct answer

Answer: (d)D.

Conclusions I and III follow.

Why this answer is correct

Given Statements:

I. All grounds are plane.

II. Some planes are covered.

III. All covered are wets.

The least possible Venn diagram for the given statement is:

Conclusions:

I. Some wets are plane - True (Because, Those part of Plane which is covered will also Wets).

II. Some wets are grounds - False (Because, No definite relation given between wets and grounds, so it can be possible only).

III. Some planes are grounds - True (Because, All Grounds are plane also gives Some planes are Grounds).

So, Conclusions I and III follow..

Hence, the correct answer is "Option 4".

Question 177

RPF SI 2022• CBT

This question is based on the following 3-letter words.

(left) ROW MAD LAY CAT (right)

If in each of the words, each letter is changed to the next letter in the English alphabetical order, how many words thus formed will have no vowel?

  1. AOption (a)

    Two

  2. BOption (b)

    Three

  3. COption (c)

    None

  4. DOption (d)

    One

View answer & explanation

Correct answer

Answer: (a)A.

Two

Why this answer is correct

Given: (left) ROW MAD LAY CAT (right)

Now, In each of the words, each letter is changed to the next letter in the English alphabetical order,

WordsEach letter is changed by it's next letter
ROWSPX
MADNBE
LAYMBZ
CATDBU

 

then there are 'Two' words having no vowel: 'SPX' and 'MBZ'.

Hence, the correct answer is "Option 1".

Question 178

RPF SI 2022• CBT

In an organic compound, a functional group determines:

  1. AOption (a)

    its chemical properties

  2. BOption (b)

    the nature of the carbon chain

  3. COption (c)

    the length of carbon chain

  4. DOption (d)

    its molecular mass

View answer & explanation

Correct answer

Answer: (a)A.

its chemical properties

Why this answer is correct

The correct answer is its chemical properties.

Key Points

  • The functional group in an organic compound determines its chemical properties.
  • The properties of a functional group include its reactivity, polarity, and ability to participate in specific chemical reactions.
  • A functional group is a specific arrangement of atoms within a molecule that imparts characteristic chemical properties to the compound.
  • Examples of functional groups include alcohols, aldehydes, ketones, carboxylic acids, and amines.

Additional Information

  • The nature of the carbon chain refers to whether it is straight or branched, saturated or unsaturated, or contains other substituents such as halogens or functional groups.
  • These factors affect physical properties such as melting point, boiling point, and solubility.
  • The length of the carbon chain can also affect physical properties such as boiling point and solubility.
  • Molecular mass is a measure of the total mass of the atoms in a molecule, which affect physical properties such as density and boiling point.

Question 179

RPF SI 2022• CBT

Madan and Mohan are standing in a row of people. Madan is standing at the 16th position from the left side of the row and Mohan is standing at the 19th position from the right side of the row. If both of them interchange their positions Madan becomes 28th from the left. How many people are standing in the row?

  1. AOption (a)

    35

  2. BOption (b)

    43

  3. COption (c)

    47

  4. DOption (d)

    46

View answer & explanation

Correct answer

Answer: (d)D.

46

Why this answer is correct

The logic followed here is:

Position of Madan from the left = 16th

Position of Mohan from the right = 19th

After interchanging, Position of Madan from the left = 28th

So,

Total number of people = Position of Mohan from the right + Position of Madan from the right after interchange - 1

= 19 + 28 - 1

= 47 - 1 = 46.

Hence, the correct answer is "Option 4".

Question 180

RPF SI 2022• CBT

In which of the following years did the fourteen major Indian scheduled commercial banks get nationalised in India?

  1. AOption (a)

    1969

  2. BOption (b)

    1970

  3. COption (c)

    1972

  4. DOption (d)

    1950

View answer & explanation

Correct answer

Answer: (a)A.

1969

Why this answer is correct

The correct answer is 1969.

Key Points

  • In 1969, the Government of India nationalized the fourteen major Indian scheduled commercial banks, which had deposits of over Rs. 50 crores.
  • The nationalization was aimed at achieving the following objectives:
  • To ensure that credit is available to priority sectors such as agriculture, small-scale industries, and exports.
  • To ensure that banking services are available to all sections of society, especially the poor and the marginalized.
  • To promote the development of banking infrastructure in rural areas.

Additional Information

  • The fourteen banks that were nationalized in 1969 were:
  • Allahabad Bank
  • Bank of Baroda
  • Bank of India
  • Bank of Maharashtra
  • Canara Bank
  • Central Bank of India
  • Dena Bank
  • Indian Bank
  • Indian Overseas Bank
  • Punjab Sind Bank
  • Punjab National Bank
  • Syndicate Bank
  • Union Bank of India
  • United Bank of India
  • The Reserve Bank of India, which regulates and supervises the banking system in India, was established in 1935.