BSF Sub Inspector (SI) Mock Test - 4 - BSF SI/ASI MCQ

The average weight of A, B, C and D = 68 kg
The average weight of A, B, C, D and E = 70 kg
So the answer = 70 × 5 – 68 × 4 = 78 kg
Hence, Option A is correct.

Sum of 100 numbers =100×210=21000
Sum of 120 numbers =120×200=24000
Sum of 20 numbers =24000−21000=3000
∴ Average of 20 new numbers =3000/20=150

Hence, Option D is correct.

Expenditure : Savings = 100 : 125 = 4 : 5

Hence, Option C is correct.

81% of 600 – x = 40% of 300
486 – x = 120
x = 366
Hence, Option C is correct.

A, B, C, D, E and F are sitting in a circle facing towards centre.

i) A is second to the left of D and second to the right of E.

ii) D is between F and B.

The final arrangement is:

Thus C is facing towards D.

Hence, the correct answer is "C".

Given: 24$3@8#45*5
After replacing the symbols we get:
24 + 3 x 8 - 45 ÷ 5
= 24 + 3 x 8 - 9
= 24 + 24 - 9
= 48 - 9
= 39
Hence, 39 is the correct answer.

From Statement 1:

We have, S visits the zoo immediately before Q, who visits on Friday.

Two persons visit between S and V.

From the statement, we cant find who visits zoo on sunday.

From Statement 2:

We have, only two people visits zoo after R.

V visits zoo two days before R.

Three people visits zoo between V and Q.

 From the statement, Q visits the zoo on Sunday.

Hence option D is correct.

Option 2 is correct.

• Carbon monoxide (CO) is one of the most serious air pollutants, highly poisonous to living beings because of its ability to block the delivery of oxygen to the organs and tissues.
• It binds to haemoglobin to form carboxyhemoglobin, which is about 300 times more stable than the oxygen-haemoglobin complex.
• In blood, when the concentration of carboxyhemoglobin reaches about 3–4 per cent, the oxygen-carrying capacity of blood is greatly reduced.
• This oxygen deficiency results in headache, weak eyesight, nervousness and cardiovascular disorder.

Hydrological Cycle

• The process of circulation of water within the hydrosphere of Earth in different forms such as liquid, solid and gaseous states are called the Hydrological Cycle of water.
• It starts with the Evaporation of water from the surface of the water bodies and further, it includes Transpiration, Sublimation, Condensation and Precipitation.

Key Points

'Hydrological cycle' steps

• The first step of the water cycle is evaporation from water bodies means the part of the Hydrosphere.
• The second step of the water cycle is condensation, which takes place in the atmosphere.
• The third step of the water cycle is precipitation and runoff means the part of the lithosphere.
• The final step of the water cycle is in the Biosphere. 
• It is the zone where all the spheres interact and work together.
• It includes processes like water uptake and transpiration by plants.

​

Thus, in the 'Hydrological cycle' the order of the source in which they connected from each other is first Hydrosphere, second Atmosphere, third Lithosphere and fourth Biosphere.

Additional Information

Processes during a hydrological cycle:

​​Evaporation

• When waters convert from liquid to gas stage as it moves from the groundwater into the atmosphere, this phenomenon is called Evaporation.
• Mainly Solar radiation is the source of energy for evaporation. 

Transpiration

• When plant uptake of water at the roots, transport of water through plant tissues, and release of vapour by leaves is known as transpiration.

Condensation

• The Process of conversion of water vapour to liquid water droplets in the air is called Condensation.
• It is responsible for the formation of fog and clouds.

​Precipitation

• When the condensed water vapour falling to the surface of the Earth is known as Precipitation.
• It occurs in the form of rain, snow, and hail.
• It provides for the delivery of atmospheric water to the earth in the form of rain.

The Small Industries Development Bank of India (SIDBI) has announced the launch of a pilot phase of ‘Mission 50K-EV4ECO’
The pilot scheme aims at strengthening the EV ecosystem, including uptake for two, three and four-wheelers through direct and indirect lending.

November 25 is recognized as the International Day for the Elimination of Violence Against Women, a significant date designated by the United Nations to spotlight and address the global issue of violence faced by women.

The correct answer is '1577'.

Key Points

• Amritsar was founded by Shri Guru Ramdas ji, the fourth guru of the Sikhs in about 1577 A.D.
• Before the city was founded, the area was covered with thick forests and had several lakes.
• The construction of Amrit Sarovar from which the city gets its present name was also started by Shri Guru Ramdas.
• His successor, Shri Guru Arjan Dev, completed the project and located the Harmandir Sahib in its midst.
• Maharaja Ranjit Singh took over full control of Amritsar by 1802 A.D.

In the case of normal goods indifference curve is always convex.

• The hardness of water is that characteristic that prevents the formation of sufficient leather or foam.
• It occurs due to the presence of carbonates, bicarbonates, sulphates, chlorides of calcium and magnesium(Ca and Mg).
• The hardness of water is due to the presence of dissolved minerals of Ca2+, Mg2+, Al3+, Iron and other heavy elements. Specifically due to Calcium Sulphate, Calcium Bicarbonate, Calcium chloride, Magnesium Sulphate, Magnesium Bicarbonate and Magnesium chloride.​

The US Chamber of Commerce released the 12th edition of the International Intellectual Property (IP) Index, ranking 55 economies on their IP frameworks. India secured the 42nd position with a 38.64% overall score. The United States, the United Kingdom, and France topped the list, emphasizing the pivotal role of strong IP systems in economic development. The index evaluates the effectiveness of IP landscapes in fostering innovation and creative industries globally.

(i) The COD (Chemical oxygen demand) test is used to measure the content of organic matter of waste water, both biodegradable and non-biodegradble.

(ii) The COD test uses potassium dichromate (K₂Cr₂O₇) in presence of concentrated sulfuric acid (H₂SO₄) solution that oxidizes both organic (predominate) and inorganic substances in a waste water sample.

(iii) The reagents for COD test are followings:

• Standard potassium dichromate solution (0.25N)
• Concentrated sulfuric acid
• Standard ferrous ammonium sulphate titrant (0.1N)
• Ferroin indicator solution.

• The heat is transferred in form of conduction, convection, and radiation. 
• Radiation is the mode of heat transfer that does not require a medium. It happens through infrared radiation. 
• The infrared radiations are electromagnetic waves having a frequency less than the visible spectrum. 
• The infrared radiation is emitted from every hot body. 
• Earth is heated by infrared radiations of the sun. The radiations are reflected back by the earth which is captured by greenhouse gases. 
• The greenhouse gases absorbers some amount of heat and keeps the earth warm. 

Thus, infrared radiation is trapped on the earth’s surface by the greenhouse effect.

Additional Information

• The major Greenhouse gas is Carbon dioxide followed by methane, water vapor, and nitrous oxide.  
• UV rays have a frequency higher than violet and they help in the formation of Ozone. 
• The wavelength of different electromagnetic waves are given in the below diagram. 

Option is A. 2.0 m

Hence, the correct option is (c).

Hence the correct answer is option B.

Plane surveying: Mean surface of earth is considered as plane.
Geodetic surveying: Curvature of the earth is taken into account.

Hence the correct answer is option C.

1K=K1+K2K1K2

K=K1K2K1+K2

Hence the correct answer is option A.

The quantity of water required for domestic use mainly depends on the habits, social status, climatic conditions, and customs of the people. In India, on an average, the domestic consumption of water under normal conditions is about 135 litres/day/capita as per IS: 1172-1171.

Hence the correct answer is option A.

The maximum deflection of the tip of the cantilever beam with concentrated load P at the free end is Pl³/3EI

Hence the correct answer is option A.

Defects liability period: A defects liability period is a set period of time after a construction project has been completed during which a contractor has the right to return to the site to remedy defects. A typical defects liability period lasts for 12 months.