Staff Selection Commission Sub Inspector Exam
Question : Which one of the following is not a compound?
Option 1: Sodium Chloride
Option 2: Carbon Monoxide
Option 3: Iron
Option 4: Water
Correct Answer: Iron
Solution : The correct answer is Iron.
Pure iron is not a compound. Since iron is made up of just one kind of atom, Fe, it is classified as an element. A material must have two or more chemically bonded elements to be classified as a compound.
Question : Directions: Which of the following figures best represents the relationship amongst the Human being, Girl, Boy?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : Based on the general information, both boys and girls are human beings. But, boys and girls have no commonalities. So, both the circles representing boys and girls will lie inside the circle that represents human beings, and the circle for boys and girls will not intersect
Question : Poverty in less developed countries is largely due to
Option 1: voluntary idleness
Option 2: income inequality
Option 3: lack of cultural activities
Option 4: lack of intelligence of the people
Correct Answer: income inequality
Solution : The correct answer is income inequality.
Income inequality in less developed countries results in a scenario where the affluent earn increasingly while those in lower classes struggle for basic needs. Issues include uneven distribution of resources like land and education, low wages, inadequate
Question : A kite is flying at a height of 123 m. The thread attached to it is assumed to be stretched straight and makes an angle of 60° with the level ground. The length of the string is (nearest to a whole number):
Option 1: 142 m
Option 2: 140 m
Option 3: 139 m
Option 4: 138 m
Correct Answer: 142 m
Solution : $\sin\theta = \frac{\text{Perpendicular}}{\text{Hypotenuse}}$ ⇒ Hypotenuse = $\frac{\text{Height}}{\text{sin(60°)}}$ = $\frac{\text{123 }}{\text{sin(60°)}}$ = $\frac{\text{123}}{\frac{\sqrt{3}}{2}}$ = $\frac{\text{123 × 2}}{\sqrt{3}}$ = $\frac{425.112}{3}$ = 142 m Hence, the correct answer is 142 m.
Question : A man spends 75% of his income. If his income increases by 28% and his expenditure increases by 20%, then what is the increase or decrease percentage in his savings?
Option 1: 52% decrease
Option 2: 52% increase
Option 3: 13% decrease
Option 4: 13% increase
Correct Answer: 52% increase
Solution : Man spends 75% of his income. Income increases by 28% Expenditure increases by 20% Let the Income of a man be 100. Expenditure = 75% of 100 = $(\frac{75}{100}) × 100$ = 75 Saving = Income – Expenditure Initial saving = 100 – 75
Question : Directions: Select the option that represents the letters that when placed from left to right in the blanks below will complete the letter series. D_C_FE_CC_ _E_C_EF_D_CE_E
Option 1: ECDEFDCECF
Option 2: CEDEFCDECE
Option 3: CEDFEDCECE
Option 4: CEDEFDCECF
Correct Answer: CEDEFDCECF
Solution : Given: D_C_FE_CC_ _E_C_EF_D_CE_E
To fill the series, we have to divide the series – D_C_FE / _CC_ _E / _C_EF_ / D_CE_E Let's check each option – First option: ECDEFDCECF; DECCFE / DCCEFE / DCC
Question : Directions: Select the correct mirror image of the given figure when the mirror is placed at MN as shown.
Solution : As per the mirror image properties, closer things appear closer to the mirror in the reflection. Here, according to the information provided, the mirror is placed on the right side of the figure (on line MN). So, the left side of the reflected image will appear
Question : Which one of the following methods of soil conservation is most effective in arid areas?
Option 1: Mulching
Option 2: Shelter belt
Option 3: Gully plugging
Option 4: Terracing
Correct Answer: Shelter belt
Solution : The correct option is Shelter.
Shelterbelt is the most effective method of soil conservation in arid areas. A shelterbelt is a row of trees or shrubs placed to keep land from eroding due to wind. Shelterbelts function by breaking up the wind and slowing
Question : _____________land that has been lying uncultivated for more than five years can be brought into farming use after improving it through improvement works.
Option 1: Permanent pasture
Option 2: Forest
Option 3: Cultivable barren
Option 4: Presently barren
Correct Answer: Cultivable barren
Solution : The correct answer is Cultivable barren.
Land that has been fallow, or uncultivated, for longer than five years is classified as cultivable barren land. Once improved by reclamation techniques, it can be placed under agriculture. The government or the community "Panchayat" owns the
Question : Select the most appropriate meaning of the given idiom.
A dry run
Option 1: a rehearsal
Option 2: a poor harvest
Option 3: a slow run
Option 4: a run on dry ground
Correct Answer: a rehearsal
Solution : The first option is correct.
The idiom a dry run means a rehearsal before the actual performance.
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