Staff Selection Commission Combined Graduate Level Exam
Question : For which discovery did William Bradford Shockley, John Bardeen and Walter Houser Brattain jointly receive the Nobel Prize in Physics in 1956?
Option 1: Discovery of transistor effect
Option 2: Discovery of thermionic emission
Option 3: Discovery of electromagnetic induction
Option 4: Discovery of receptors for temperature and touch
Correct Answer: Discovery of transistor effect
Solution : The correct answer is the Discovery of the transistor effect.
The Nobel Prize for Physics in 1956 was jointly awarded to William Bradford, John Bardeen, and Walter Houser Brattain for their discovery of the transistor effect. They were awarded jointly for their
Question : The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation changes to 30°. If the aeroplane is flying at a height of 2500 metres, then the speed of the aeroplane in km/h is:
Option 1: $600$
Option 2: $600(\sqrt{3}+1)$
Option 3: $600\sqrt{3}$
Option 4: $600(\sqrt{3}–1)$
Correct Answer: $600(\sqrt{3}–1)$
Solution : Let the vertical height be $h$ and horizontal distance be $B_{1}$ when the elevation is 45° and $B_{2}$ when the elevation is 30°. Using trigonometry ratio, when elevation is 45°. $\tan\theta =\frac{\text{Height}}{\text{Distance}}$ ⇒ $\tan45° = \frac{h}{B_{1}}$ ⇒ $1 = \frac{h}{B_{1}}$ ⇒ $B_{1} = h$ Using
Question : Select the most appropriate ANTONYM of the underlined word.
The manager decided to resign from his post as the bank was declared to be insolvent.
Option 1: Independent
Option 2: Commercial
Option 3: Affluent
Option 4: Bankrupt
Correct Answer: Affluent
Solution : The correct choice is the third option.
Explanation:
The word insolvent describes a situation where an individual or organisation is unable to meet financial obligations and is, in essence, bankrupt. To find the antonym, we look for a word that indicates financial prosperity or wealth.
Question : Identify the segment in the sentence which contains a grammatical error.
She is not as smart as I think at first.
Option 1: I think
Option 2: She is not
Option 3: as smart as
Option 4: at first
Correct Answer: I think
Solution : The correct choice is the first option.
The past tense thought should be used because it refers to a past action. The speaker is reflecting on their past thoughts or impressions about the person's intelligence. The past tense thought helps to convey the
Question : $\Delta ABC$ and $\Delta DEF$ are two similar triangles and the perimeters of $\Delta ABC$ and $\Delta DEF$ are 90 cm and 54 cm respectively. If the length of DE = 36 cm, then the length of AB is:
Option 1: 60 cm
Option 2: 40 cm
Option 3: 45 cm
Option 4: 50 cm
Correct Answer: 60 cm
Solution : The ratio of the perimeters of two similar triangles is equal to the ratio of their corresponding sides. $\frac{{AB}}{DE} = \frac{\text{Perimeter of $\Delta ABC$}}{\text{Perimeter of $\Delta DEF$}}$ ⇒ $\frac{AB}{36\;cm} = \frac{90\;cm}{54\;cm}$ ⇒ AB = 60 cm Hence, the correct answer is 60 cm.
Question : Select the most appropriate synonym of the given word. Deliberate
Option 1: Casual
Option 2: Hasty
Option 3: Planned
Option 4: Rushed
Correct Answer: Planned
Solution : The third option is the correct choice.
Deliberate emphasises careful consideration, and planned indicates intentional organisation and preparation, making it the appropriate synonym.
The meanings of the other words are:
Casual suggests informality.
Hasty conveys quick decision-making without thorough thought.
Rushed emphasises hurriedness and time
Question : Who among the following was the founder of the "Azad Hind Fauj" ?
Option 1: Lala Har Dayal
Option 2: Subhash Chandra bose
Option 3: Veer Savarkar
Option 4: Chandrashekhar Azad
Correct Answer: Subhash Chandra bose
Solution : The correct option is Subhas Chandra Bose
Subhas Chandra Bose formed the Azad Hind Fauj, also referred to as the Indian National Army (INA). A well-known figure in the Indian independence fight against British colonial control was Subhas Chandra Bose. He supported the
Question : Directions: Which of the following letter clusters will replace the question mark (?) in the given series? EJCK, GMDO, IPES, ?, MVGA
Option 1: KRFW
Option 2: KTFW
Option 3: KSFW
Option 4: KRFV
Correct Answer: KSFW
Solution : Given: EJCK, GMDO, IPES, ?, MVGA
Add 2, 3, 1, and 4 to the positional values of the first, second, third, and fourth letters respectively of the previous term to get the next term of the series. EJCK→E + 2 = G; J + 3
Question : Comprehension:
Read the passage and answer the questions that follow.
The drainage systems of India are mainly controlled by the broad relief features of the subcontinent. Accordingly, the Indian rivers are divided into two major groups: the Himalayan rivers; and the Peninsular rivers.
Apart from originating from the two major physiographic regions of India, the Himalayan and the Peninsular rivers are different from each other in many ways. Most of the Himalayan rivers are perennial. It means that they have water throughout the year. These rivers receive water from rain as well as from melted snow from the lofty mountains. The major Himalayan rivers are the Indus, the Ganga, and the Brahmaputra. These rivers are long and are joined by many large and important tributaries. A river along with its tributaries may be called a river system. The two major Himalayan rivers, the Indus and the Brahmaputra originate from the north of the mountain ranges. They cut through the mountains making gorges in the upper course. The perennial Himalayan rivers have long courses from their source to the sea. They perform intensive erosional activity in their upper courses and carry huge loads of silt and sand with their swift current. In the middle and the lower courses, these rivers form meanders, oxbow lakes, levees, and many other depositional features in their floodplains as their speed slackens. They also have well-developed deltas.
A large number of the Peninsular rivers like the Godavari, Kaveri, and Krishna are seasonal, as their flow is dependent on rainfall. During the dry season when it doesn’t rain, even the large rivers have reduced flow of water in their channels. The Peninsular rivers have shorter and shallower courses as compared to their Himalayan counterparts. However, some of them originate in the central highlands and flow towards the west. Most of the rivers of peninsular India originate in the Western Ghats and flow towards the Bay of Bengal.
Question:
Which of these statements is NOT true about perennial rivers?
Option 1: They have a very short dry season.
Option 2: They cover very long distances till they reach the sea.
Option 3: Most of them originate in the Himalayas.
Option 4: They have well developed deltas.
Correct Answer: They have a very short dry season.
Explanation: Perennial rivers, as mentioned in the passage, have water throughout the year, which means they do not experience a short dry season. Perennial rivers, especially the Himalayan rivers like the Indus,
Question : If $\frac{a}{b}+\frac{b}{a}=1$ and $a+b=2$, then the value of $a^3+b^3$ is:
Option 1: 0
Option 2: 3
Option 3: 1
Option 4: 2
Correct Answer: 0
Solution : $\frac{a}{b} + \frac{b}{a} = 1$ $⇒ \frac{(a^2 + b^2)}{(ab)} = 1$ $⇒ (a^2 + b^2) = ab$ ----(i) $a^3 + b^3 = (a + b)(a^2 + b^2 – ab)$ Putting the value of $(a^2 + b^2)$ from equation (i), $⇒ a^3 + b^3 = (a
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