Staff Selection Commission Sub Inspector Exam
Question : Pipes A and B can fill an empty tank in 6 and 8 hours respectively, while pipe C can empty the full tank in 10 hours. If all three pipes are opened together, then the tank will get filled in:
Option 1: $4 \frac{4}{23}$ hours
Option 2: $6\frac{1}{5}$ hours
Option 3: $5\frac{5}{23}$ hours
Option 4: $7\frac{1}{2}$ hours
Correct Answer: $5\frac{5}{23}$ hours
Solution : Hourly work done by A = $\frac{1}{6}$ Hourly work done by B = $\frac{1}{8}$ Hourly work done by C = $\frac{1}{10}$ The tank can be filled by A, B, and C = $\frac{1}{6}+\frac{1}{8}-\frac{1}{10}$ = $\frac{20+15-12}{120}$ = $\frac{23}{120}$ The tank can be filled in $\frac{120}{23}=5\frac{5}{23}$
Question : The mean proportional of 0.04 and 0.36 is:
Option 1: 0.144
Option 2: 1.2
Option 3: 12
Option 4: 0.12
Correct Answer: 0.12
Solution : Mean proportional of 0.04 and 0.36 = $\sqrt{0.04 × 0.36}$ = 0.12 Hence, the correct answer is 0.12.
Question : Select the most appropriate ANTONYM of the given word.
FLEXIBLE
Option 1: elastic
Option 2: ductile
Option 3: pliable
Option 4: rigid
Correct Answer: rigid
Solution : The correct choice is the fourth option.
Flexible is used to describe something that can easily be bent.
Rigid is something that does not lose its shape, even with the application of force. This makes it the correct antonym of the given word.
The
Question : Select the INCORRECTLY spelt word in the given sentence. It is beyond my cognative capacity to solve the mathematical problems.
Option 1: problems
Option 2: cognative
Option 3: mathematical
Option 4: capacity
Correct Answer: cognative
Solution : The correct answer is the second option.
The incorrectly spelled word in the given sentence is "cognative". The correct spelling is "cognitive" and it refers to mental processes related to acquiring knowledge, understanding, and reasoning.
Therefore, the correct sentence should be: It is beyond my
Question : Directions: Which of the following diagrams represents the correct relationship among Mammals, Cows, and Crows?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : Based on the general information, Cows come under the class of Mammals whereas Crows come under the class of Birds. So, the circle representing Cows will lie inside the circle that represents Mammals, and the circle for Crows will not intersect with the other two circles.
Question : Select the sentence that has a spelling error. A- A fisherman, enfeebled with age, could no longer go out to sea so he began fishing in the river. B- Every morning he would go down to the river and sit there fishing the whole day long. C- In the evening, he would sell whatever he had caught, buy food for himself and go home. D- One hot afternoon, while he was bemoaning his fate, a large bird alited near him.
Option 1: One hot afternoon, while he was bemoaning his fate, a large bird alited near him.
Option 2: In the evening, he would sell whatever he had caught, buy food for himself and go home.
Option 3: A fisherman, enfeebled with age, could no longer go out to sea so he began fishing in the river.
Option 4: Every morning he would go down to the river and sit there fishing the whole day long.
Correct Answer: One hot afternoon, while he was bemoaning his fate, a large bird alited near him.
Solution : The first option is correct.
The sentence with a spelling error is option D: One hot afternoon, while he was bemoaning his fate, a large bird alited near him. The
Question : Directions: In the following question, one statement is given followed by two conclusions I and II. You have to consider the one statement to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow from the given statements. Statement: Cactus plants are fresh but need the least water. Conclusions: I. All fresh plants are cactus. II. Cactus plants need the least water.
Option 1: Neither I not II follows
Option 2: Only II follows
Option 3: Both I and II follows
Option 4: Only I follows
Correct Answer: Only II follows
Solution : According to the above-given statement, Conclusions (I): All fresh plants are cactus. This conclusion is false as in the given statement we have information related to only cactus that cactus plants are fresh but need the least water but it is not given
Question : Directions: The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown in the following figures. How would this paper look when unfolded?
Solution : When the given folded paper is unfolded, it will look like –
Hence, the first option is correct.
Question : Directions: B % D means B is the brother of D; B & D means B is the mother of D; B × D means B is the husband of D; B # D means B is the sister of D; B + D means B is the son of D; B @ D means B is the father of D. Which of the following statements is correct regarding the given expression? P % Q + S # R % U × T
Option 1: P is the son of T
Option 2: S is the brother-in-law of T
Option 3: U is the mother’s brother of P
Option 4: P is the daughter of T
Correct Answer: U is the mother’s brother of P
Solution : Given: B % D ⇒ B is the brother of D B & D ⇒ B is the mother of D B × D ⇒ B is the husband of D B # D ⇒ B is the sister
Question : ______ has become the 65th Indian Grandmaster at the age of 13.
Option 1: Prithu Gupta
Option 2: Raunak Sadhwani
Option 3: Rahul Vaid
Option 4: R. Praggnanandhaa
Correct Answer: Raunak Sadhwani
Solution : The correct answer is Raunak Sadhwani.
Raunak Sadhwani became the 65th Indian Grandmaster at the age of 13 years. The Grandmaster is the title award for the chess player by the world chess organisation FIDE (Federation Internationale des Echecs or International Chess Federation).
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