Staff Selection Commission Sub Inspector Exam
Question : Which of the following cities is situated along the Coromandel Coast?
Option 1: Tiruchirappalli
Option 2: Vellore
Option 3: Tirunelveli
Option 4: Tuticorin
Correct Answer: Tuticorin
Solution : The correct option is Tuticorin.
Tuticorin, officially known as Thoothukudi, is a port city in the Thoothukudi district of the Indian state of Tamil Nadu. It is a major port city, and its port, known as V. O. Chidambaranar Port Trust, is one of
Question : Directions: In the following question, some parts of the sentence may have some errors. Find out which part of the sentence has an error and select the appropriate option. If the sentence is free from error, select "No error".
As soon as (1) / the lion saw the deer (2) / he began to run after it. (3) / No error (4)
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (4)
Solution : The correct choice is the fourth option.
The sentence is grammatically correct. It describes a sequence of events.
Question : Select the option that expresses the given sentence in active voice.
The villain of the play was hated by the audience.
Option 1: The audience hated the villain of the play.
Option 2: The villain hated the audience of the play.
Option 3: The audience had hated the villain of the play.
Option 4: The audience was hating the villain of the play.
Correct Answer: The audience hated the villain of the play.
Solution : The correct choice is the first option.
Active voice emphasises the doer of the action, while passive voice emphasises the receiver. To convert passive to active, we make the subject perform the action and rephrase the verb.
The
Question : If $x^2+\frac{1}{x^2}=\frac{7}{4}$ for $x>0$, what is the value of $(x^3+\frac{1}{x^3})$?
Option 1: $\frac{3\sqrt{3}}{5}$
Option 2: $\frac{3\sqrt{15}}{5}$
Option 3: $\frac{3\sqrt{15}}{8}$
Option 4: $\frac{3\sqrt{5}}{8}$
Correct Answer: $\frac{3\sqrt{15}}{8}$
Solution : Given: $x^2+\frac{1}{x^2}=\frac{7}{4}$ ⇒ $x^2+\frac{1}{x^2}+2=\frac{7}{4}+2$ [adding 2 on both sides] ⇒ $x^2+\frac{1}{x^2}+2×x^2×\frac{1}{x^2}=\frac{15}{4}$ ⇒ $(x+\frac{1}{x})^2=\frac{15}{4}$ $\therefore (x+\frac{1}{x})=\frac{\sqrt{15}}{2}$ Now, we know, $(x+\frac{1}{x})^3=x^3+\frac{1}{x^3}+3×x×\frac{1}{x}(x+\frac{1}{x})$ ⇒ $(\frac{\sqrt{15}}{2})^3=x^3+\frac{1}{x^3}+3×\frac{\sqrt{15}}{2}$ $\therefore x^3+\frac{1}{x^3}= \frac{15\sqrt{15}}{8}-\frac{3\sqrt{15}}{2}=\frac{3\sqrt{15}}{8}$ Hence, the correct answer is $\frac{3\sqrt{15}}{8}$.
Question : The difference between the 38% of a number and 22% of that number is 3200. What is the $15 \frac{1}{2}$% of that number?
Option 1: 3100
Option 2: 3200
Option 3: 3000
Option 4: 2800
Correct Answer: 3100
Solution : Let the number be 100%. The difference between the 38% of a number and 22% of that number = 3200 ⇒ 38% – 22% = 3200 ⇒ 16% = 3200 ⇒ 100% = 20000 Now, ⇒ 15$\frac{1}{2}$% of 2000 = 3100 Hence, the correct answer
Question : Directions: In the following question, some parts of the sentence have errors, and some are correct. Find out which part of the sentence has an error. The number of that part is the answer. If a sentence is error-free, your answer is "No Error".
I shake his hand when he arrived and when he left.
(1) I shake his hand
(2) when he arrived
(3) and when he left.
(4) No Error
Option 1: 1
Option 2: 2
Option 3: 3
Option 4: 4
Correct Answer: 1
Explanation: This part of the sentence is in the present tense, which creates a mismatch in the verb tenses within the sentence. The use of "shake" suggests a habitual or general action, but the context of the
Question : In a circle of radius 5 m, AB and CD are two equal and parallel chords of length 8 m each. What is the distance between the chords?
Option 1: 5 m
Option 2: 6 m
Option 3: 3 m
Option 4: 8 m
Correct Answer: 6 m
Solution : Given: Radius($OB$) = 5 m Chord ($AB$) = 8 m So, $AQ = BQ = \frac{8}{2} = 4$ m By Pythagoras' theorem, $OQ^2=OB^2-BQ^2$ ⇒ $OQ^2=5^2-4^2$ ⇒ $OQ^2=25-16$ ⇒ $OQ^2=9$ ⇒ $OQ=3$ $\therefore$ Distance between the chord $PQ=2\times 3 = 6$ m Hence, the correct
Question : Directions: A man is standing in the park facing North. He turns to 90o towards the left and walks 40 km. He again takes a 90o turn towards the right and walks 50 km. He takes the next 90o turn towards the right and walks 60 km. Lastly, he takes a 90o turn towards the right and walks 50 km. How much distance is he from the starting point?
Option 1: 40 km
Option 2: 60 km
Option 3: 50 km
Option 4: 20 km
Correct Answer: 20 km
Solution : Given:
Firstly, we will draw the diagram according to the given instructions –
Now, we have to calculate the distance between the starting point and the end point.
The final distance between the start point and the end point = 20km
Hence, the fourth
Question : Directions: PRO 5 is related to OSQ 15 in a certain way. In the same way, OPO 10 is related to NQQ 30. Which of the following is related to MAC 9 using the same logic?
Option 1: NZA 3
Option 2: OZA 3
Option 3: NZB 3
Option 4: NZA 27
Correct Answer: NZA 3
Solution : Given: PRO 5 is coded as OSQ 15, OPO 10 is coded as NQQ 30 PRO 5→P(16) – 1 = O(15); R(18) + 1 = S(19); O(15) + 2 = Q(17); 5 × 3 = 15 OPO 10→O(15) – 1 = N(14); P(16) +
Question : Comprehension: Read the given passage and answer the questions that follow.
Key factors influencing subway air pollution will include station depth, date of construction, type of ventilation (natural/air conditioning), types of brakes (electromagnetic or conventional brake pads) and wheels (rubber or steel) used on the trains, train frequency, and more recently, the presence or absence of platform screen-door systems. In particular, much subway particulate matter is sourced from moving train parts such as wheels and brake pads, as well as from the steel rails and power supply materials, making the particles dominantly iron-containing. To date, there is no clear epidemiological indication of abnormal health effects on underground workers and commuters. New York subway workers have been exposed to such air without significant observed impacts on their health, and no increased risk of lung cancer was found among subway train drivers in the Stockholm subway system. But a note of caution is struck by the observations of scholars who found that employees working on the platforms of Stockholm underground, where PM concentrations were greatest, tended to have higher levels of risk markers for cardiovascular disease than ticket sellers and train drivers. The dominantly ferrous particles are mixed with particles from a range of other sources, including rock ballast from the track, biological aerosols such as bacteria and viruses, and air from the outdoors, and driven through the tunnel system on turbulent air currents generated by the trains themselves and ventilation systems.
Question
Select the most suitable word from the passage, which means ‘not covered or hidden’.
Option 1: Turbulent
Option 2: Sourced
Option 3: Abnormal
Option 4: Exposed
Correct Answer: Exposed
Solution : The fourth option is correct.
Explanation: Exposed fits the description of something not covered or hidden. In the context of the passage, it refers to individuals being subjected to or coming into contact with subway air pollution and its components without any concealment or protection.
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