Staff Selection Commission Sub Inspector Exam
Question : Which among the following is the habitat of 'Dogfish'?
Option 1: River
Option 2: Sea
Option 3: Lake
Option 4: Marsh
Correct Answer: Sea
Solution : The correct option is Sea
Dogfish, also known as cartilage-forming fish, are found in marine habitats, including cold and temperate oceans, in both shallow and deep waters. They live in coastal environments, estuaries, continental shelves, slopes, and open oceans, where certain species have been
Question : According to the Koppen classification, which regions experience cold, humid winters with short summers?
Option 1: Western Rajasthan
Option 2: Northern Madhya Pradesh
Option 3: South of Goa
Option 4: Arunachal Pradesh
Correct Answer: Arunachal Pradesh
Solution : The correct answer is Arunachal Pradesh.
Koppen's classification of climatic regions of India is based on mean annual and major monthly temperature and precipitation data. The areas that experience cold, humid winters with short summers are Arunachal Pradesh, Sikkim and some parts of Assam.
Question : If $\cos A=\frac{1}{11}$, then find the value of cot A.
Option 1: $\frac{2 \sqrt{30}}{11}$
Option 2: $2 \sqrt{30}$
Option 3: $\frac{1}{2 \sqrt{30}}$
Option 4: $\frac{11}{2 \sqrt{30}}$
Correct Answer: $\frac{1}{2 \sqrt{30}}$
Solution : Given, $\cos A=\frac{1}{11}$ We know, $\sin^2\theta+\cos^2\theta=1$ ⇒ $\sin^2A+\cos^2A=1$ ⇒ $\sin^2A+\frac{1}{11^2}=1$ ⇒ $\sin^2A=1-\frac{1}{121}$ ⇒ $\sin^2A=\frac{121-1}{121}$ ⇒ $\sin^2 A=\frac{120}{121}$ ⇒ $\sin A=\sqrt{\frac{120}{121}}$ ⇒ $\sin A=\frac{2\sqrt{30}}{11}$ ⇒ $\cot A = \frac{\cos A}{\sin A}$ ⇒ $\cot A = \frac{\frac{1}{11}}{\frac{2\sqrt{30}}{11}}$ ⇒ $\cot A=\frac{1}{2\sqrt{30}}$ Hence, the correct answer is $\frac{1}{2\sqrt{30}}$.
Question : What will be the net discount (in percentage) after the two successive discounts of 40% and 20%?
Option 1: 60%
Option 2: 68%
Option 3: 52%
Option 4: 42%
Correct Answer: 52%
Solution : Given: First discount = 40% and second discount = 20% Net discount = $(x+y-\frac{xy}{100})$%, where $x$ and $y$ are two successive discounts. = $40+20-\frac{\text{40×20}}{100}$ = $60-\frac{\text{800}}{100}$ = $60-8$ = $52$ So, the net discount = 52% Hence, the correct answer is 52%.
Question : The following bar diagram shows the number of students who opted for different subjects in the year 2020 and 2021. Find the ratio of students opting for Economics to students opting for Physical Education in 2020.
Option 1: 3 : 7
Option 2: 3 : 5
Option 3: 5 : 9
Option 4: 5 : 7
Correct Answer: 3 : 5
Solution : Students opting for Economics in 2020 = 75 Students opting for Physical Education in 2020 = 125 Required ratio = 75 : 125 = 3 : 5 Hence, the correct answer is 3 : 5.
Question : The Beating Retreat ceremony is held at which of the following places?
Option 1: Chandni Chowk
Option 2: Connaught Place
Option 3: India Gate
Option 4: Vijay Chowk
Correct Answer: Vijay Chowk
Solution : The correct answer is Vijay Chowk.
In India, the official conclusion of Republic Day celebrations is marked with a beating retreat. It is organised by the Ministry of Defence and takes place on the evening of January 29, the third day after Republic
Question : Directions: If + means –, – means ×, × means ÷, and ÷ means +, then what will be the value of the following expression? 15 – 2 ÷ 90 × 9 + 10
Option 1: 32
Option 2: 40
Option 3: 30
Option 4: 50
Correct Answer: 30
Solution : Given: + means –, – means ×, × means ÷, and ÷ means + 15 – 2 ÷ 90 × 9 + 10
After replacing symbols according to the question, the equation becomes – = 15 × 2 + 90 ÷ 9 – 10 =
Question : Two metallic balls P and Q are such that the diameter of P is four times the diameter of Q. What is the ratio between the volumes of P and Q?
Option 1: 32 : 1
Option 2: 16 : 1
Option 3: 8 : 1
Option 4: 64 : 1
Correct Answer: 64 : 1
Solution : Given: Two metallic balls P and Q are such that the diameter of P is four times the diameter of Q. Use the formula, The volume of the sphere of radius $r$ is $\frac{4}{3}\pi r^3$. Let the diameters of P and Q be
Question : ______ is characterized by abundant dissolved oxygen, sunlight, nutrients, generally high wave energies and water motion and in the intertidal subzone, alternating submergence and exposure.
Option 1: The Lentic Zone
Option 2: The Limnetic Zone
Option 3: The Littoral Zone
Option 4: The Benthic Zone
Correct Answer: The Littoral Zone
Solution : The correct option is The Littoral Zone.
The Littoral Zone is a region of the sea that is characterised by an abundance of dissolved oxygen, sunlight, nutrients, high wave energies and water motion. The intertidal subzone of the Littoral Zone experiences tidal
Question : Directions: In a certain code language, DRAFT is written as GUDIW and LIMIT is written as OLPLW. How will MAJOR be written in that language?
Option 1: OBMRT
Option 2: QCNQT
Option 3: PDMRU
Option 4: QBWRU
Correct Answer: PDMRU
Solution : Given: DRAFT is written as GUDIW and LIMIT is written as OLPLW.
Add 3 to the place value of each letter of DRAFT and LIMIT to get the code. DRAFT→D + 3 = G; R + 3 = U; A + 3 = D; F
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