Staff Selection Commission Multi Tasking Staff Exam
Question : Pipes A and B together can fill a tank in 10 hours. Pipes B and C together can fill the same tank in 12 hours. Pipes A and C together can fill the same tank in 15 hours. In how many hours can pipe B alone fill the same tank?
Option 1: $\frac{120}{7}$ hours
Option 2: $15$ hours
Option 3: $\frac{120}{11}$ hours
Option 4: $\frac{155}{13}$ hours
Correct Answer: $\frac{120}{7}$ hours
Solution : Pipes A and B together can fill a tank in 10 hours. Pipes B and C together can fill the same tank in 12 hours. Pipes A and C together can fill the same tank in 15 hours. According to the question, Work done
Question : Directions: Three statements are given followed by two conclusions numbered I and II. 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: Some books are pens. Some books are copies. All copies are pencils. Conclusions: I. Some pencils are pens. II. Some pencils are books.
Option 1: Both conclusions I and II follow
Option 2: Only conclusion I follows
Option 3: Only conclusion II follows
Option 4: Neither conclusion I nor II follows
Correct Answer: Only conclusion II follows
Solution : The possible Venn diagram according to the given statements is as follows –
Let's analyse the conclusions – Conclusion (I): Some pencils are pens – From the Venn diagram, it is evident that there is no definite relation between pencils and pens.
Question : The toxic metal associated with the Minamata disease is:
Option 1: lead
Option 2: cadmium
Option 3: arsenic
Option 4: mercury
Correct Answer: mercury
Solution : The correct option is mercury.
The Minamata incident occurred in the 1950s, and 1960s in Minamata, Japan, as a result of a chemical factory controlled by the Chisso Corporation releasing methylmercury into the waters of Minamata Bay. The deadly mercury compound made its way
Question : Select the most appropriate meaning of the given idiom.
Leave no stone unturned
Option 1: To act in a strange manner
Option 2: Make all possible efforts
Option 3: To get fired from the job
Option 4: Not willing to accept the ideas of others
Correct Answer: Make all possible efforts
Solution : The correct choice is the second option.
Explanation: This phrase implies putting in exhaustive effort, leaving nothing overlooked or unexplored, to achieve a particular goal. It suggests thoroughness and determination in pursuing something.
Question : Directions: Two statements are given followed by two conclusions numbered I and II. 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: Some milk is curd. Some curd is butter. Conclusions: I. Some milk is butter. II. Some butter is curd.
Option 2: Neither conclusion I nor II follows
Option 4: Only conclusion I follows
Solution : The possible Venn diagram according to the given statement is as follows –
Let's analyse the conclusions – Conclusion (I): Some milk is butter – From the Venn diagram, it is evident that there is no direct relation between Milk and Butter.
Question : The following table shows the yearly production of scooters (in thousands) in different factories. In which year the total production of scooters from all factories was equal to the yearly average number of scooters produced during 2015-2019?
Option 1: 2015
Option 2: 2017
Option 3: 2016
Option 4: 2018
Correct Answer: 2015
Solution : Yearly average number of scooters produced during 2015-2019 = $\frac{115+149+101+108+102}{5}$ = $\frac{575}{5}$ = 115 The total production of scooters from all factories was equal to the yearly average number of scooters produced during 2015-2019 in the year 2015. Hence, the correct answer is 2015.
Question : A 200 m long train is running at a speed of 100 km/hr. In how much time will it pass a man standing near the railway line?
Option 1: 10.4 sec
Option 2: 9.2 sec
Option 3: 7.2 sec
Option 4: 6.4 sec
Correct Answer: 7.2 sec
Solution : Length of train = 200 m Speed of train = 100 km/hr 1 km/hr = $\frac{5}{18}$ m/sec 100 km/hr = $100 \times \frac{5}{18}=\frac{250}{9}$ m/sec Time = $\frac{\text{Distance}}{\text{Speed}}=\frac{200}{(\frac{250}{9})}=7.2$ sec Hence, the correct answer is 7.2 sec.
Question : Directions: In the given question, a sentence is given with a blank to be filled in with an appropriate word. Four alternatives are suggested for each question. Choose the correct alternative out of the four alternatives.
He is getting married _________ Maya.
Option 1: only
Option 2: by
Option 3: with
Option 4: to
Correct Answer: to
Solution : The correct choice is the fourth option.
The preposition "to" is the correct choice in this sentence because it is used to indicate the person to whom someone is getting married. In this context, "to" is the appropriate preposition to connect the subject (he)
Question : If the volume of a cube is 5832 cm3, then what is the lateral surface area of this cube?
Option 1: 1024 cm2
Option 2: 384 cm2
Option 3: 576 cm2
Option 4: 1296 cm2
Correct Answer: 1296 cm2
Solution : The volume of a cube is given by the formula \(V = a^3\), where \(a\) is the edge length of the cube. Given that the volume of the cube is 5832 cm3. $a = \sqrt[3]{V} = \sqrt[3]{5832} = 18 \, \text{cm}$
Question : Select the most appropriate meaning of the bracketed idiom in the given sentence. Sure, fixing a flubbed decision isn't always (a piece of cake), but it's rarely impossible.
Option 1: The family bond is closer than anything else
Option 2: A task that can be accomplished very easily
Option 3: A rare event or occurrence
Option 4: Having no stand, shows favour at one time and unfavour at another
Correct Answer: A task that can be accomplished very easily
Solution : The second option is correct.
In the context of the sentence, the phrase a piece of cake is used to convey that fixing a flubbed decision is not always very easy, but it's rarely impossible.
The idiom is
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