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UPSC Indian Forest Service (IFoS) Prelims CSAT (GS2) Mock Test- 6 Free


Full Mock Test & Solutions: UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 (80 Questions)

You can boost your UPSC 2026 exam preparation with this UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 (available with detailed solutions).. This mock test has been designed with the analysis of important topics, recent trends of the exam, and previous year questions of the last 3-years. All the questions have been designed to mirror the official pattern of UPSC 2026 exam, helping you build speed, accuracy as per the actual exam.

Mock Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 120 minutes
  • - Total Questions: 80
  • - Analysis: Detailed Solutions & Performance Insights

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UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 1

What is the central message of this passage?

Detailed Solution: Question 1

Paragraph 1 suggests that the sense of justice is an important concern for individuals. The line ―"But a sense of justice is among the concerns that can move people and often do. Social values can play—and have played—an important part in the success of various forms of social organization" proves it.

Paragraph 2 suggests that a sense of social justice is a natural part of individual conscience. The lines ―"But the basic idea of justice are not alien to social beings" and ―"That space already exists" proves this.

All other options are just individual ideas presented in the passage.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 2

With reference to the passage which of the following forms of social organization would not be successful without social values?

1. Free market

2. Welfare policies

3. Right to equality

Detailed Solution: Question 2

All three—free market, welfare policies, and right to equality—need social values to succeed.

The passage says social values support systems like the market, public welfare, and civil rights. It also says people naturally care about justice and fairness, which helps these systems work well. Without social values, these forms of social organization wouldn’t function effectively.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 3

Directions: In the following questions some statements are given. Conclusions are given after the statements. While studying the statements carefully, consider the conclusions given below. Select the correct conclusion using the codes given below.

Statement: Non-violence is the greatest force. It is mightier than the mightiest weapon of destruction devised by the ingenuity of man. 

Which one of the following inferences can be drawn from the above statements?

1. Violence is not as powerful a force as nonviolence.

2. Man is capable of devising weapons of destruction.

Detailed Solution: Question 3

Since non-violence is the greatest force, therefore, violence cannot be as powerful as non-violence. Therefore, statement 1 is correct. 

Statement 2 follows from the given information.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 4

A cylindrical container with diameter of base 42 cm contains sufficient water to submerge a rectangular solid of iron with dimensions 22 cm × 14 cm × 10.5 cm. Find the rise in the level of the water when the solid is submerged.

Detailed Solution: Question 4

Diameter of cylindrical container

Therefore, radius

Dimensions of rectangular solid

Volume of solid

Let the height of water

Therefore, the volume of water in the container

(ii)

From (i) and (ii)

or

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 5

The author’s viewpoint can be best summed up in which of the following statements?

Detailed Solution: Question 5

According to the passage, “rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others”. Therefore, option (D) is correct.

Option (A) is incorrect as generalization cannot be made for all the laws.

Option (B) is incorrect as rightful liberty is constrained by other’s rights.

Option (C) is also incorrect as no such information is given in the passage.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 6

At a certain film festival, eight films will be shown J, K, L, M, N, P, Q and R. The order of the showings must meet the following conditions:

N is shown before L, J is shown third, Q is shown fifth. If N is shown immediately after P, then P could be shown?

Detailed Solution: Question 6

According to question, the order of showing film could be

Since N is shown immediately after P and N must be shown before L, the order P, N, L must be fulfilled. Therefore, P will be shown sixth.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 7

Six persons are sitting in a circle. A is facing B, B is to the right of E and left of C. C is to the left of D. F is to the right of A. Now D exchanges his seat with F and E with B. Who will be sitting to the left of D?

Detailed Solution: Question 7

  1. Determine an initial seating that satisfies all clues
    Label six seats around a circle (clockwise) as 1 through 6. Every person “faces” the center, so “to the left” means the next seat clockwise, and “to the right” means the next seat anticlockwise.

    Use the five clues together:

    • A faces B → A and B must be three seats apart (opposite each other).

    • B is to the right of E → B sits immediately anticlockwise from E.

    • B is to the left of C → B sits immediately clockwise from C.

    • C is to the left of D → C sits immediately clockwise from D.

    • F is to the right of A → F sits immediately anticlockwise from A.

    One arrangement that meets all five at once is:

    Seat 1: A Seat 2: D Seat 3: C Seat 4: B Seat 5: E Seat 6: F

    – A (1) faces B (4).
    – B (4) is immediately anticlockwise of E (5).
    – B (4) is immediately clockwise of C (3).
    – C (3) is immediately clockwise of D (2).
    – F (6) is immediately anticlockwise of A (1).

  2. Apply the two swaps

    • D swaps with F → D moves from seat 2 to seat 6; F moves from 6 to 2.

    • E swaps with B → E moves from seat 5 to seat 4; B moves from 4 to 5.

    After these exchanges, the seats become:

    Seat 1: A Seat 2: F Seat 3: C Seat 4: E Seat 5: B Seat 6: D

  3. Identify who sits to the left of D

    • D is now in seat 6.

    • To D’s left (clockwise) is seat 1, occupied by A.

Answer: A sits to the left of D.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 8

A, B, C, D, E, F & G are sitting in a line facing the East. C is the immediate right of D. B is at an extreme end and has E as his neighbour. G is between E and F. D is sitting third from the South end. Who are the persons sitting at the extreme ends?

Detailed Solution: Question 8

Sitting arrangement of A, B, C, D, E, F and G.

Solution Explanation (Step-by-Step)

  1. Determine the “third from the South end” position

    • Since they are all facing East, “South end” corresponds to the bottom of the line.

    • Label positions from South to North as 1 (Southmost), 2, 3, 4, 5, 6, 7 (Northmost).

    • “D is sitting third from the South end” ⇒ D occupies position 3.

  2. Place C relative to D

    • Facing East, a person’s Right is toward the South (i.e., toward lower-numbered positions).

    • “C is the immediate right of D” ⇒ C sits immediately to D’s South ⇒ C is at position 2.

  3. Locate B and its neighbour E

    • “B is at an extreme end and has E as his neighbour.”

      • If B were at position 1 (Southmost), then E would have to be at position 2, but position 2 is already taken by C ⇒ impossibility.

      • Therefore, B must be at the other end ⇒ position 7 (Northmost), and E sits next to B ⇒ position 6.

  4. Fit G “between” E and F

    • E is at position 6. To place G between E and F in a straight line, the only open slots that straddle position 6 are 5 and 4.

    • The order must be either E–G–F (from North downward) or F–G–E, but E is fixed at 6.

    • The only way to have G sit “between” E and F is:

      • E at 6, G at 5, F at 4.

  5. Place the remaining person A

    • Positions now occupied:

      • 7 → B

      • 6 → E

      • 5 → G

      • 4 → F

      • 3 → D

      • 2 → C

    • The only position left is 1 ⇒ A goes to position 1.

  6. Identify the extreme ends

    • South end (position 1) → A

    • North end (position 7) → B

Answer
The persons sitting at the two extreme ends are A (South end) and B (North end).

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 9

Direction: Choose the alternative which closely resembles the water image of the given question figure.

Question figure:

Answer figure:

Select the correct answer from the codes given below:

Detailed Solution: Question 9

The water image of any object is the inverted image obtained by turning the object upside down.  Now, we are supposed to find the water image of the question figure. 

On observing the options, we can see that the figure is given in option (D) is the appropriate answer. It has been shown below:

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 10

Direction: Consider the following number sequence.

6 1 4 8 6 5 7 6 2 4 2 6 5 6 3 4 6 3 5 1 6 7 4 1 6 3

How many 6s are immediately preceded and followed by an odd number?

Detailed Solution: Question 10

Odd numbers are not divisible by 2.

Given sequence of number:

6 1 4 8 6 5 7 6 2 4 2 6 5 6 3 4 6 3 5 1 6 7 4 1 6 3

There are total eight 6s out of which only three 6s are immediately preceded and followed by an odd number.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 11

What is the main theme discussed by the author in the passage?

Detailed Solution: Question 11

Let us note the following:

The main theme is the main issue that is being discussed by the author in the passage.

The author is trying to understand the ways in which diabetes can be brought under control.

The author rarely mentions about causes of diabetes in the passage.

Hence, the first option is incorrect.

The third option is neither implied nor mentioned anywhere in the passage.

The same goes with the fourth option.

Thus, the correct answer is The author is trying to understand the ways in which diabetes can be controlled in India.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 12

Which of the following have been assumed in the passage?

Detailed Solution: Question 12

Let us note the following:

The assumption is a fact that is accepted without any proof.

In the passage, the author is trying to understand the causes and effects of poverty in India.

Thus, the author has assumed without proof that poverty already exists in India.

The first option is given directly in the passage. 

Thus, it is not an assumption.

The third and the fourth options are neither implied nor can be inferred from anywhere in the passage.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 13

Rohan put 9 cards on a table, some face up and the rest face down. How many were put face down?

A. Rohan put an even number of the cards face up.

B. Rohan put twice as many of the cards face up as he put face down.

Select the correct answer from the options given below:

Detailed Solution: Question 13

Given:

Rohan put 9 cards on a table, some face up and the rest face down

A. Rohan put an even number of the cards face up.

B. Rohan put twice as many of the cards face up as he put face down.

Statement A alone is not sufficient to answer the question

From statement B: Rohan put twice as many of the cards face up as he put face down

Let x be the number of card put Face down

⇒ Number of cards put Face up = 2x

Now,

2x + x = 9

⇒ 3x = 9

⇒ x = 3

∴ The number of card put Face down = 3

Statement B alone is sufficient but statement A alone is not sufficient to answer the question asked.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 14

Two statements S1 and S2 are given below followed by a Question:

S1: Each girl in the family has twice as many brothers as sisters.

S2: Every boy in the family has an equal number of brothers and sisters.

Question: How many sisters and brothers are there in a family of seven children.

Which one of the following is correct in respect of the above statements and the question?

Detailed Solution: Question 14

S1: Each girl in the family has twice as many brothers as sisters.

This means that if one girl has one sister then she has two brothers. But since it is a family of seven, if she has two sisters then four brothers.

Therefore, four brothers and three sisters are there in a family of seven children.

Thus, S1 alone is sufficient to answer the question.

S2: Every boy in the family has an equal number of brothers and sisters.

This means that one boy has three sisters and three brothers in a family of seven children.

Therefore, four brothers and three sisters are there in family of seven children.

Thus, S2 alone is sufficient to answer the question.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 15

Abhi is a student of math. He tries to do an activity, “He made a tricycle, the radii of front and 2 rear wheels are 28 cm and 42 cm respectively. When the tricycle is stationary, he marks a red spot on each of the wheels at the point of contact with the ground. Then he tries to peddle his tricycle. He wants to find out that after what distance will all the 3 red spots touch the ground simultaneously again.” Find the distance for him as he is sitting on his tricycle.

Detailed Solution: Question 15

Given∶
The radius of front-wheel = 28 cm
Radius of 2 rear wheels = 42 cm each
Circumference of circle = 2πr
Concept of LCM.
The radius of front-wheel cm
So, circumference of front wheel
Radius of 2 rear wheels each
So, circumference of 2 rear wheels each
Therefore, the required distance LCM of
∴ After 528 cm all the three red spots touch the ground simultaneously again.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 16

The outer surface of a 4 cm × 4 cm × 4 cm cube is painted completely in red. It is sliced parallel to the faces to yield sixty-four 1 cm × 1 cm × 1 cm small cubes. How many small cubes have two faces painted?

Detailed Solution: Question 16

The original cube is cut into 64 cubes as:

There are 4 horizontal layers one above the other having 16 cubes each.

First Layer: It has all the cubes painted. So, no. of two faces painted cubes = 8 (2 cubes on each edge)
Second Layer: Cubes that are part of the faces of the big cubes are painted. So, no. of two faces painted cubes = 4 (Cubes in 4 corners)
Third Layer: Cubes that are part of the faces of the big cubes are painted. So, no. of two faces painted cubes = 4 (Cubes in 4 corners).

Fourth Layer: It has all the cubes painted. So, no. of two faces painted cubes = 8 (2 cubes on each edge)
Total no. of cubes which have two painted faces = 8 + 4 + 4 + 8 = 24.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 17

What is the main context discussed by the author in the passage?

Detailed Solution: Question 17

According to the passage:

  • The author is trying to understand the reason why civilizations fall.
  • The first and the third options mean more or less the same.
  • The author is trying to understand the reasons for the first and third options.
  • The author does not intend to state the first and the third options.
  • The fourth option may be one of the reasons for the first and the third options.
  • However, the fourth option is not the main idea of discussion.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 18

The marks obtained by a student were entered as 78 instead of 68. Due to this, the average marks of the class increased by 0.5 marks. How many students are there in the class?

Detailed Solution: Question 18

Given:
The increase in average = 0.5
The marks obtained by a student were entered as 78 instead of 68
Average
Let the total number of students be
The increase in average
Increase in total mark
Increase in total marks



The total number of students in the class is .

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 19

Two statements S1 and S2 are given below followed by a question:

S1: FOG is written as '265' and DISH is written as '3184'.

S2: RAW is written as '709'.

Question: What is the code for DRAW?

Which one of the following is correct in respect of the Statement and the questions?

Detailed Solution: Question 19

S1: FOG is written as '265' and DISH is written as '3184'.

Using this statement alone we cannot define the code for DRAW.

So, S1 alone is not sufficient to know the code for DRAW.

S2: RAW is written as '709'.

Using this statement alone we cannot define the code for DRAW.

So, S2 alone is not sufficient to know the code for DRAW.

If we combine both the statements,

We can say the code for letter D is '3', R is '7', A is '0', and W is '9'.

Thus, we can say that the code for DRAW is '3709'.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 20

With reference to the passage, the following assumptions have been made:

1. The author gives primary importance to physical and material help in eradicating human misery.
2. Charitable homes, hospitals, etc. can remove human misery to a great extent.

Which of the assumptions is/are valid?

Detailed Solution: Question 20

The correct answer is 'Neither 1 nor 2'.

Key Points

  • Let us examine the given assumptions.
  • Assumption 1 states that the author gives primary importance to physical and material help in eradicating human misery.
    • However, this is incorrect because as mentioned in the passage, the author feels that man's character is the main problem behind the miseries he faces.
  • Assumption 2 is incorrect because the author explicitly states that we may convert every house in the country into a charitable asylum, create more hospitals but human misery will continue until man nature changes.

Therefore, the correct option is 'Neither 1 nor 2'.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 21

According to the passage, which of the following statements is most likely to be true as the reason for man's miseries?

Detailed Solution: Question 21

The correct answer is 'The refusal on the part of man to change his character.'

Key Points

  • According to the passage, man's miseries are related to his nature.
  • The passage states that until man’s nature changes, his physical needs will keep rising and no amount of physical help will be able to satisfy him.
  • Also, physical resources on earth are limited.

Therefore, the most likely reason for man’s miseries, according to the passage, is the refusal on the part of man to change his character.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 22

What is the most logical and rational inference that can be made from the above passage?

Detailed Solution: Question 22

The correct answer is ‘Climate adaptation should be examined in tandem with other economic development options.’

Key Points

  • In the passage, the author argues that climate adaptation policies are ineffective if they are not designed keeping in mind other development concerns.
  • For example, in agriculture focus has not to be only on food security in mitigating climate change but also other measures like water and pest management, agriculture extension, etc. so that there can be simultaneous economic development and environmental protection.
  • Climate adaptation has to go hand-in-hand with economic development.

Thus, the logical inference is that climate adaptation should be examined in tandem with other economic development options.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 23

There is a numeric lock which has a 3-digit PIN. The PIN contains digits 1 to 7. There is no repetition of digits. The digits in the PIN from left to right are in decreasing order. Any two digits in the PIN differ by at least 2. How many maximum attempts does one need to find out the PIN with certainty?

Detailed Solution: Question 23

Option (3) is correct.

All Possible Values for a 3-digit PIN are 753, 752, 751, 742, 741, 731, 642, 641, 631, 531.

So, the maximum number of attempts one need to find out the PIN with certainty is 10.

Hence, the correct answer is an option(3) i.e., 10.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 24

There is a milk sample with 50% water in it. If 1/3rd of this milk is added to equal amount of pure milk, then water in the new mixture will fall down to

Detailed Solution: Question 24

Given :

There is a milk sample with 50% water in it.

Calculations :

Let the amount of milk sample be 'x' litres 

Now 1/3rd amount of milk sample is added to the same amount of pure milk. 

Amount of new pure milk = x/3 litres 

Amount added from milk sample = x/3 litres 

Total volume = (x/3) + (x/3) 

⇒ (2x/3) litres 

Amount of water in new mixture = 50% of x/3    (water is 50% in sample)

⇒ x/6 litres 

Now per cent of water in new mixture = (x/6)(2x/3) × 100 

⇒ (3/12) × 100 

⇒ 25% 

∴ Option 1 will be the correct choice. 

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 25

A bag contains 15 red balls and 20 black balls. Each ball is numbered either 1 or 2 or 3. 20% of the red balls are numbered 1 and 40% of them are numbered 3. Similarly, among the black balls, 45% are numbered 2 and 30% are numbered 3. A boy picks a ball at random. He wins if the ball is red and numbered 3 or if it is black and numbered 1 or 2. What are the chances of his winning? 

Detailed Solution: Question 25

Given:

A bag contains 15 red balls and 20 black balls

Calculation:

The winning condition is if the ball is red and numbered 3 or if it is black and numbered 1 and 2

⇒ Total number of balls in bag = 15 + 20 = 35

⇒ Number of red balls numbered 3 = 40% of 15 = 6

⇒ Number of black balls numbered 1 or 2 = 70% of 20 = 14

⇒ The probability of winning = (6 + 14)/35 = 20/35 = 4/7

∴ The required result will be 4/7.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 26

A simple mathematical operation in each number of the sequence 14, 18, 20, 24, 30, 32, ... results in a sequence with respect to prime numbers. Which one of the following is the next number in the sequence?

Detailed Solution: Question 26

Given :

There is a simple mathematical operation 14, 18, 20, 24, 30, 32 related to prime numbers

Calculations :

As the given series is related to prime numbers, we need to see the relation of it with the prime numbers

When we look at the series we can see all numbers come after a prime number

Series relation with prime be like (13)14, (17)18, (19)20, (23)24, (29)30, (31)32

Here we can see these numbers are coming after a prime number which is in order,

So the next number will be the number after the next prime number,

The next prime number after 31 will be 37

So the next number for the given series will be 38

∴ The next number will be 38 

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 27

Find the number of square in the given figure.

Detailed Solution: Question 27

As per the given question:

The numbers of squares in the given figures are:

Thus, there are '7' squares in the given figures.

Hence, the correct answer is "7".

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 28

Given below are two statements

Statement I: Compound interest involves the reinvestment of the earned interest, which in future years also earns interest

Statement II:  Simple interest is the amount earned or paid on a sum of compound interest and principal amount

In light of the above statement, choose the most appropriate answer from the option given below

Detailed Solution: Question 28

Concept used:

In the case of the compound interest, Interest is earned on the interest every year.

And, In case of simple interest, Interest is only earned on the principal only and interest is the same in every year.

Calculation:

From the above statement we come to know that Statement I is correct and Statement II is wrong

∴ The correct answer is option 3

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 29

Which of the following is the most crucial and logical inference that can be made from the above passage?

Detailed Solution: Question 29

The correct answer is Access to cooking gas can reduce premature deaths in poor households.

Key Points

  • Let's examine the given assumptions:
  • Assumption 1 is incorrect as the passage itself says that though the number of people using cooking gas is increasing, the number of those using polluting fuels has been static.
  • Assumption 2 is incorrect as polluting due to cooking fuel is not the only cause of indoor air pollution. Besides, only subsidizing cooking gas won't suffice, awareness generation programmes are required for the same.
  • Assumption 3 is irrelevant to the given passage.
  • Assumption 4 is correct as the passage highlights that the use of polluting solid fuels leads to immature deaths. Thus, access to clean cooking gas will solve the issue.

Hence, assumption 4 is the correct answer.

Additional Information

  • Causes of indoor air pollution include: Passive tobacco smoke, Polluting fuels, products like finishes, paint strippers, rug and oven cleaners, pesticides and paints, Vapor-phase compounds include vinyl chloride and benzene, asbestos, etc.

UPSC Indian Forest Service Prelims CSAT (GS2) Mock Test- 6 - Question 30

There are seven persons up on a ladder, A, B, C, D, E, F and G (not in that order). A is further up than E but is lower than C. B is in the middle. G is between A and B. E is between B and F. If F is between E and D, the person on the bottom step of the ladder will be

Detailed Solution: Question 30

1) B is in the middle.

2) A is further up than E but is lower than C.
3) G is between A and B.
4) F is between E and D
The above two statements imply that there is one vacant position between A and B.
Case I: A is two steps above B i.e. on the 6th step. In this case, G would be on the 5th step.
Case II: A is two steps below B i.e. on the 2nd step. In this case, G would be on the 3rd step. Also, E would be on the 1st step. Now, we also have to place F between E and D which is not possible in this case. Thus, this case is not valid.
In case I, C would be on the top-most step. D would be on the last step and F would be on the 2nd step.

Hence, D is on the bottom step of the ladder.

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