Staff Selection Commission Sub Inspector Exam
Question : In the Canada Deuterium Uranium (CANDU) reactor, a natural uranium-fuelled reactor, the function of moderator and coolant is performed by:
Option 1: Light water
Option 2: Carbon dioxide
Option 3: Heavy water
Option 4: Sodium
Correct Answer: Heavy water
Solution : The correct answer is Heavy water.
The function of moderator and coolant is performed by heavy water in the Canada Deuterium Uranium (CANDU) reactor, a natural uranium-fuelled reactor. CANDU reactors produce electricity through a process known as fission. The main function of the moderator
Question : A man spends 65% of his income. His income increases by 20% and his expenditure also increases by 10%. The percentage of increase in his savings is ________.
Option 1: 38.5%
Option 2: 35.8%
Option 3: 10%
Option 4: 20%
Correct Answer: 38.5%
Solution : Let the income of the man be 100 His expenditure is 65% of his income = 65 Savings = income – expenditure = 100 – 65 = 35 When income increased by 20% = 120 Expenditure increases by 10% = $65\times\frac{110}{100}=71.5$ New savings = 120
Question : Directions: If MZQBL is decoded as NYUWO, then decode OJXMT.
Option 1: XJAGO
Option 2: PIAGQ
Option 3: QJBHS
Option 4: VJBGQ
Correct Answer: VJBGQ
Solution : Given: MZQBL is decoded as NYUWO.
Reversing the letters of the word MZQBL, then add 2, subtract 3, add 4, subtract 3 and add 2 in place value of the first, second, third, fourth and fifth letters of resultant letters respectively, to get the required
Question : The given pie chart shows the percentage of students who speak different languages in a hostel. The total number of students in the hostel is 120. What is the ratio of students who speak English and Bhojpuri to those who speak Tamil?
Option 1: 10 : 3
Option 2: 1 : 1
Option 3: 20 : 3
Option 4: 5 : 1
Correct Answer: 5 : 1
Solution : Total number of students in the hostel is 120. Students who speak English = 120 × $\frac{15}{100}$ = 18 Students who speak Bhojpuri = 120 × $\frac{10}{100}$ = 12 Students who speak Tamil = 120 × $\frac{5}{100}$ = 6 $\therefore$ Required ratio =
Question : Directions: In the following question, the given sentence has four parts marked P, Q, R, and S. Choose the part of the sentence with the error and select it as your answer. If there is no error, select ' No Error (S)' as your answer.
If you describe someone as a maverick, (P) / you mean that he is unconventional and independent (Q) / and do not think or behave in the same way as other people. (R) / No Error (S)
Option 1: 1
Option 2: 2
Option 3: 3
Option 4: 4
Correct Answer: 3
Solution : The error lies in the third part of the sentence.
There is an error in the subject-verb agreement in the sentence. The verb "do" should be replaced with "does". The singular subject "he" should be followed by the singular verb form "does" to comply with
Question : Directions: In the following question, 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 orientations of the question figure in which of the given option figures it can fit itself. By comparison of all option figures, the question figure is embedded only in
Question : If $\operatorname{cos} \theta+\operatorname{sin} \theta=\sqrt{2} \operatorname{cos} \theta$, find the value of $(\cos \theta-\operatorname{sin} \theta)$
Option 1: $\sqrt{2} \sin \theta$
Option 2: $\sqrt{2} \cos \theta$
Option 3: $\frac{1}{\sqrt{2}} \sin \theta$
Option 4: $\frac{1}{2}\cos \theta$
Correct Answer: $\sqrt{2} \sin \theta$
Solution : Given: $\cos \theta + \sin \theta = \sqrt{2} \cos \theta$ Squaring both sides, we get: ⇒ $\cos^2 \theta + \sin^2 \theta + 2\sin \theta \cos \theta = 2\cos^2 \theta$ ⇒ $\cos^2 \theta - \sin^2 \theta = 2\cos \theta \sin \theta$ ⇒$(\cos \theta +
Question : In which province of Pakistan is the site of the ancient civilisation of Mohenjo-daro located?
Option 1: Balochistan
Option 2: Sindh
Option 3: Khyber Pakhtunkhwa
Option 4: Punjab
Correct Answer: Sindh
Solution : The correct option is Sindh
The ancient civilization of Mohenjo-daro is located in the Sindh province of Pakistan. Mohenjo-daro, along with Harappa, is one of the major sites of the Indus Valley Civilization, one of the world's oldest urban cultures. Mohenjo-daro showcases advanced urban planning
Question : Select the most appropriate ANTONYM of the given word.
Placid
Option 1: Turbulent
Option 2: Pensive
Option 3: Pristine
Option 4: Destined
Correct Answer: Turbulent
Solution : The correct choice is the first option.
The antonym for placid is turbulent. Placid describes a calm and peaceful state, while turbulent characterises a state of conflict, disorder, or agitation. The meanings of the other options are as follows:
Question : Who among the following attacked the Somnath Temple?
Option 1: Mahmud of Ghazni
Option 2: Muhammad Ghori
Option 3: IItutmish
Option 4: Qutubuddin Aibak
Correct Answer: Mahmud of Ghazni
Solution : The correct option is - Mahmud of Ghazni
Mahmud of Ghazni is the son of the king of Ghazni. He came to India to plunder the wealthy temples. He raided the Northwestern part of India 17 times. His 16th raid was the
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