Staff Selection Commission Sub Inspector Exam
Question : Which of the following was the first theory of superconductivity?
Option 1: Ginzburg-Landau theory
Option 2: London theory
Option 3: Resonating valence bond theory
Option 4: Quantum field theory
Correct Answer: London theory
Solution : The correct answer is the London theory.
London theory was the first phenomenological explanation of superconductivity. It was proposed in 1935, not long after the brothers Fritz and Heinz London learned that superconductors emit magnetic fields. The Meissner effect, wherein a material exponentially
Question : Find the greatest possible length (in metres) that can be used to exactly measure the lengths 6 m, 5 m 25 cm and 12 m 50 cm.
Option 1: 0.25 m
Option 2: 0.75 m
Option 3: 0.90 m
Option 4: 0.35 m
Correct Answer: 0.25 m
Solution : To find the greatest possible length that can be used to exactly measure the lengths 6 m, 5 m 25 cm, and 12 m 50 cm. 6 m = 600 cm 5 m 25 cm = 525 cm 12 m 50 cm = 1250
Question : Directions: From the given answer figures, select the one in which the question figure is hidden/embedded.
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : Because there is no restriction on the rotation of the figure, we will check all the possible angles where the question figure can fit itself in the given option figures. By comparison of all the option figures, the given question figure is embedded only in the
Question : Directions: A is the father of B, C is the daughter of B, D is the brother of B, and E is the son of A. What is the relationship between C and E?
Option 1: Brother and sister
Option 2: Cousins
Option 3: Niece and uncle
Option 4: Uncle and aunt
Correct Answer: Niece and uncle
Solution : As per the given information, the family tree will be as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.
So, from the above family tree, C is the niece of E and E
Question : If $x:y=2:1$, then $(x^{2}-y^{2}) : (x^{2}+y^{2})$ is:
Option 1: 3 : 5
Option 2: 5 : 3
Option 3: 4 : 5
Option 4: 5 : 6
Correct Answer: 3 : 5
Solution : $x : y = 2 : 1$ Let $x = 2k$ and $y = k$ So, $x^2 = 4k^2$ and $y^2 = k^2$ Now putting the value in the given equation, we get, $(x^{2}-y^{2}) : (x^{2}+y^{2})$ $= (4k^2 - k^2) : (4k^2 +
Question : Directions: If A denotes +, B denotes ×, C denotes −, and D denotes ÷, then what will be the value of the following expression? 67 C 45 A 12 D 6 B 2 = ?
Option 1: 23
Option 2: 22
Option 3: 26
Option 4: 24
Correct Answer: 26
Solution : Given: 67 C 45 A 12 D 6 B 2 = ?
On replacing the letters with the mathematical signs, the equation becomes – = 67 – 45 + 12 ÷ 6 × 2 = 67 – 45 + 2 × 2 = 67 –
Question : Which of the following is not an operating system?
Option 1: Multi-user single-tasking
Option 2: Single-user single-tasking
Option 3: Single-user Multi-tasking
Option 4: Multi-user Multi-tasking
Correct Answer: Multi-user single-tasking
Solution : The answer is Multi-user single-tasking.
Multi-user single-tasking is not commonly regarded as a complete operating system. It describes a computing environment where several users utilise the system simultaneously, but each user is limited to one job at a time. This kind of setting could
Question : Select the INCORRECTLY spelt word.
Option 1: Fluorecence
Option 2: Forebear
Option 3: Forgo
Option 4: Flounder
Correct Answer: Fluorecence
Solution : The correct choice is the first option.
The given word "fluorecence" is misspelt. It has a missing letter "s". The correct spelling is fluorescence, which refers to the emission of light by a substance that has absorbed light or other electromagnetic radiation.
The
Question : Amylase enzyme can be found in ______.
Option 1: the stomach
Option 2: the liver
Option 3: the gall bladder
Option 4: saliva
Correct Answer: saliva
Solution : The correct option is saliva.
Amylase enzymes can be found in saliva and pancreatic secretions in the human body. It plays a crucial role in digesting starches into simpler sugars like maltose, facilitating their absorption in the small intestine. Additionally, amylase is present in
Question : Select the most appropriate option that can substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No substitution’. I like to read books, but my brother prefers to watching movies.
Option 1: in watching
Option 2: to watch
Option 3: on watching
Option 4: No substitution
Correct Answer: to watch
Solution : The correct choice is the second option.
Explanation: The original sentence contains a grammatical error. When using prefer, it should be followed by the base form of the verb, not the "-ing" form. The correct construction is "prefers to
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