Staff Selection Commission Sub Inspector Exam
Question : Directions: If a mirror is placed on line AB, then which of the answer figures is the right image of the given figure?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : As per the mirror image properties, closer things appear close to the mirror in the reflection. So, according to the above property and the information provided, the mirror is placed on the right side of the figure (on line AB). So, the left side of the
Question : A number, when divided by 15 and 18 every time, leaves 3 as a remainder, the least possible number is:
Option 1: 83
Option 2: 103
Option 3: 39
Option 4: 93
Correct Answer: 93
Solution : Given, A number, when divided by 15 and 18 every time, leaves 3 as a remainder. LCM of 15 and 18 = 2 × 3 × 3 × 5 = 90 It leaves 3 as a remainder in each case So, the required least number
Question : The radius of the base of a right circular cone is 5 cm. Its slant height is 13 cm. What is its volume (in cm3, rounded off to 1 decimal place)? (Take $\pi=\frac{22}{7}$)
Option 1: 328.6
Option 2: 323.4
Option 3: 314.3
Option 4: 340.5
Correct Answer: 314.3
Solution : Given: Radius = 5 cm Slant height = 13 cm $\text{height}=\sqrt{\text{slant height}^2-\text{radius}^2}=\sqrt{13^2-5^2}=\sqrt{169-25}=\sqrt{144}=12$ We know that, The volume of the cone = $\frac{1}{3}\pi r^2h$ = $\frac{1}{3}\times\frac{22}{7}\times 5 \times 5 \times 12$ = $\frac{2200}{7}$ = $314.3$ cm3 Hence, the correct answer is 314.3.
Question : The given chart represents the distribution of the percentage of sales of a particular brand of car from five showrooms A, B, C, D, and E in 2018. The total number of cars sold during that year from the five showrooms is 5000.
What is the total number of cars sold from showrooms B and D?
Option 1: 1750
Option 2: 1550
Option 3: 1650
Option 4: 1450
Correct Answer: 1550
Solution : Total cars sold = 5000 Cars sold from B and D = 22 + 9 = 31% Required number of car sold = $\frac{31}{100}\times5000$ = 1550 Hence, the correct answer is 1550.
Question : Select the most appropriate meaning of the underlined idiom. Students often burn the midnight oil to qualify for competitive examinations.
Option 1: put the things on fire at night
Option 2: want to be at a place full of light
Option 3: work until late at night
Option 4: sleep well
Correct Answer: work until late at night
Solution : The third option is the correct choice.
Explanation: The idiom burn the midnight oil is a figurative expression that conveys the idea of working late into the night, especially when the task requires extra effort, concentration, or time.
Therefore, the correct
Question : The shadow of a tower standing on a level plane is 40 metres longer when the sun's altitude is 45°, than when it is 60°. The height of the tower is:
Option 1: $30(3+\sqrt{3})$ metres
Option 2: $40(3+\sqrt{3})$ metres
Option 3: $20(3+\sqrt{3})$ metres
Option 4: $10(3+\sqrt{3})$ metres
Correct Answer: $20(3+\sqrt{3})$ metres
Solution : Given: Height of the tower = AB Shadow at 60° = BC Shadow at 45° = BD CD = 40 metres Let BC be $x$ m. In $\Delta$ ABC, we have, $\tan 60°=\frac{AB}{BC}$ ⇒ $\sqrt{3}=\frac{AB}{x}$ ⇒ $x=\frac{AB}{\sqrt{3}}$ -------(1) In $\Delta$ ABD, we have, $\tan
Question : The National Anthem of India, "Jana Gana Mana", was first sung at the ______ session of the Indian National Congress.
Option 1: Calcutta
Option 2: Lahore
Option 3: Belgaum
Option 4: Tripuri
Correct Answer: Calcutta
Solution : The correct answer is Calcutta.
The song was initially performed in public on December 27, 1911, during the Indian National Congress session in Calcutta, which is now Kolkata. "Jana Gana Mana" is the name of the Indian National Anthem. Rabindranath Tagore, the first Indian
Question : The person known for "Communication Revolution in India" is:
Option 1: Prannoy Roy
Option 2: Pitroda Ericson
Option 3: Craig Wigginton
Option 4: Sam Pitroda
Correct Answer: Sam Pitroda
Solution : The correct answer is Sam Pitroda.
Sam Pitroda is widely recognised as a key figure in India's communication revolution, earning him the title of The Father of India's Communication Revolution.
Question : Hirakud dam is built across the river:
Option 1: Betwa
Option 2: Mahanadi
Option 3: Krishna
Option 4: Godavari
Correct Answer: Mahanadi
Solution : The correct answer is Mahanadi.
Hirakud Dam is built across the Mahanadi River and near the Sambalpur in Odisha. Hirakud Dam is the longest dam in India and one of the longest dams in the world. The construction was started in 1948 and was
Question : Whose law states that at a junction in an electric circuit, the sum of the currents flowing into the junction is equal to the sum of the currents flowing out of the junction?
Option 1: Michael Faraday
Option 2: Georg Simon Ohm
Option 3: Victor Francis Hess
Option 4: Gustav Robert Kirchhoff
Correct Answer: Gustav Robert Kirchhoff
Solution : The correct option is Gustav Robert Kirchhoff.
Kirchhoff's Current Law, formulated by Gustav Kirchhoff, states that at any junction (or node) in an electric circuit, the algebraic sum of the currents entering the junction is equal to the algebraic sum of the
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