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Question 71

RPF SI 2022• CBT

Two numbers are in the ratio 5 ∶ 8. If the first number increases by 40% and second number decreases by 15%, the new ratio becomes ______.

  1. AOption (a)

    37 ∶ 39

  2. BOption (b)

    35 ∶ 34

  3. COption (c)

    12 ∶ 17

  4. DOption (d)

    23 ∶ 26

View answer & explanation

Correct answer

Answer: (b)B.

35 ∶ 34

Why this answer is correct

Shortcut Trick

Multiply the ratio terms directly by their respective percentage change factors.

New First Number = 5 × 140% = 7.0

New Second Number = 8 × 85% = 6.8

New Ratio = 7.0 : 6.8 → 70 : 68 = 35 : 34.

∴ The correct answer is 35 : 34.

Alternate Method

Given:

Initial Ratio of two numbers = 5 : 8

Percentage Increase in first number = 40%

Percentage Decrease in second number = 15%

Formula Used:

New Value = Original Value × (100 ± Change%)/100

Calculations:

Let the two numbers be 50x and 80x respectively.

⇒ First number after 40% increase = 50x × (140/100) = 70x

⇒ Second number after 15% decrease = 80x × (85/100) = 68x

⇒ New Ratio = 70x : 68x

⇒ New Ratio = 70 : 68

⇒ Dividing both terms by 2:

⇒ New Ratio = 35 : 34

∴ The correct answer is 35 : 34.

Additional Information

Concept of Multiplier

For an increase of x%, multiply the base value by (1 + x/100). For a decrease of x%, multiply by (1 − x/100).

Simplifying Ratios

A ratio a : b remains unchanged if both terms are multiplied or divided by the same non-zero constant k.

Successive Percentage Change

If a value changes by a% and then by b%, the net change is [a + b + (a × b)/100]%.

Question 72

RPF SI 2022• CBT

Which enzyme requires the presence of hydrochloric acid for its action in the process of digestion?

  1. AOption (a)

    Trypsin

  2. BOption (b)

    Pepsin

  3. COption (c)

    Lipase

  4. DOption (d)

    Amylase

View answer & explanation

Correct answer

Answer: (b)B.

Pepsin

Why this answer is correct

The correct answer is 'Pepsin'.

Key Points

  • Gastric juice contains three substances: hydrochloric acid, enzyme pepsin, and mucus.
  • Hydrochloric acid in the stomach is used to make the medium acidic to facilitate the action of the enzyme pepsin and to kill germs if any.
  • Enzyme pepsin digests proteins and converts them into peptones.

​

Additional Information

  • Trypsin
  • Trypsin is an enzyme that is essential for your body to digest protein, a critical component for building and repairing tissue including bones, muscles, cartilage, skin, and blood.
  • When combined with chymotrypsin, trypsin can help in injury recovery.
  • ​Lipase
  • ​Lipase is an enzyme the body uses to break down fats in food so they can be absorbed in the intestines.
  • Lipase is produced in the pancreas, mouth, and stomach.
  • ​Amylase
  • ​Amylase is responsible for the breaking of the bonds in starches, polysaccharides, and complex carbohydrates into easier-to-absorb simple sugars.
  • Salivary amylase is the first step in the chemical digestion of food.

Question 73

RPF SI 2022• CBT

In March 2022, Union Cabinet of India approved the establishment of the World Health Organization Global Centre for Traditional Medicine (WHO GCTM) in Jamnagar, Gujarat. Under which ministry will this centre be set up?

  1. AOption (a)

    Ministry of AYUSH

  2. BOption (b)

    Ministry of Women and Child Development

  3. COption (c)

    Ministry of Health and Family Welfare

  4. DOption (d)

    Ministry of Cooperation

View answer & explanation

Correct answer

Answer: (a)A.

Ministry of AYUSH

Why this answer is correct

The correct answer is 'Ministry of AYUSH'.

Key Points

  • Prime Minister Shri Narendra Modi laid the foundation stone of the WHO Global Centre for Traditional Medicine (GCTM) in Jamnagar, Gujarat.
  • A groundbreaking ceremony was attended by the Prime Minister of Mauritius Shri Pravind Kumar Jugnauth and Dr Tedros Ghebreyesus, Director-General, of the World Health Organization (WHO).
  • The Ministry of Ayush and the World Health Organization (WHO) is establishing the world’s first and only Global Centre for Traditional Medicine (WHO GCTM) in Jamnagar, Gujarat.
  • Speaking on this occasion the Prime Minister said, “The WHO Global Centre for Traditional Medicine is recognition of India's contribution and potential in this field.
  • India’s traditional medicine system is not limited only to treatment.
  • India takes this partnership as a huge responsibility for serving the entire humanity.”

 Additional Information

  • Ministry of Women and Child Development:
  • The Department of Women and Child Development, Government of India, came into existence as a separate Ministry with effect from 30th January 2006, earlier since 1985 it was a Department under the Ministry of Human Resources Development.
  • The Ministry was constituted with the prime intention of addressing gaps in State action for women and children to promote inter-Ministerial and inter-sectoral convergence to create gender-equitable and child-centred legislation, policies and programmes.
  • Ministry of Health and Family Welfare:
  • On August 7, 2014, vide extraordinary Gazette notification on Thursday, August 7, 2014, the Department of AIDS Control has been merged with the Department of Health & Family Welfare and is now known as National AIDS Control Organization (NACO).
  • As per the amendment in the allocation of business rules vide the Cabinet secretariat’s Notification on December 8, 2014, the Department of AYUSH has been made Ministry of Ayurveda, Yoga and Naturopathy, Unani, Siddha and Homeopathy (AYUSH) with focused attention on the development of education and research in Ayurveda, Yoga & naturopathy, Unani, Siddha and Homoeopathy systems.
  • Now Ministry of Health and Family Welfare comprises the following two departments, each of which is headed by a Secretary to the Government of India.
  • Ministry of Cooperation:
  • The Union Ministry of Cooperation is a ministry under the Government of India which was formed in July 2021.
  • The ministry provides a separate administrative, legal and policy framework for strengthening the cooperative movement in the country.
  • The ministry's creation was announced on 6 July 2021 along with its vision statement of "Sahkar se Samriddhi".
  • Before the creation of this ministry, the objectives of this ministry were looked after by the Ministry of Agriculture.

Question 74

RPF SI 2022• CBT

An optical device X has a focal length of -30 cm. X can be:

  1. AOption (a)

    either concave lens or a convex mirror

  2. BOption (b)

    either a convex lens or a convex mirror

  3. COption (c)

    either a convex lens or a concave mirror

  4. DOption (d)

    either a concave lens or a concave mirror

View answer & explanation

Correct answer

Answer: (a)A.

either concave lens or a convex mirror

Why this answer is correct

The correct answer is "either a concave lens or a concave mirror".

Key Points

  • In contrast to convex mirrors and convex lenses, concave mirrors and concave lenses produce larger pictures.
  • A hollow spherical can be made into a mirror by cutting it into pieces, painting the exterior of each piece, and then polishing the interior to reflect light.
  • A convex lens, which is thicker in the center and gets thinner as we move toward the edges, condenses a straight beam of light.
  • Images are magnified using a concave mirror and convex lens.

Additional Information

  • A concave lens is a lens that bends a direct light beam away from the source into a cropped, upright virtual image.
  • Both actual and virtual images can be created using it. At least one internal surface of concave lenses is curved.
  • Since it is rounded at the center and bulges outward at the borders, a concave lens is also known as a diverging lens because it causes the light to diverge.
  • Since they make distant objects appear smaller than they actually are, they are used to cure myopia.

Question 75

RPF SI 2022• CBT

The Balwant Rai Mehta Committee recommended in 1957 for the establishment of a ____ Panchayati Raj System in India.

  1. AOption (a)

    Four-tier

  2. BOption (b)

    Two-tier

  3. COption (c)

    Three-tier

  4. DOption (d)

    Five-tier

View answer & explanation

Correct answer

Answer: (c)C.

Three-tier

Why this answer is correct

The correct answer is Three-tier.

Key Points

  • Balwant Rai Mehta Committee was appointed to examine the working of the community development program and the national extension service.
  • Balwant Rai Mehta Committee was appointed in 1957.
  • Balwant Rai Mehta was the chairman of this committee.
  • The Balwant Rai Mehta Committee recommended establishing a three-tier Panchayati Raj structure.
  • The Balwant Rai Mehta committee suggested that the structure of the Panchayati Raj should consist of the village, the block, and the district level.
  • Gram Panchayat at the village level.
  • Panchayat Samiti at the block level.
  • Zila Parishad at the district level.
  • The National Development Council approved the committee's recommendations in 1958.

Additional Information

  • Other committees related to Panchayati raj:
  • Ashok Mehta Committee:
  • In December 1977, the Janata Government appointed a committee on Panchayati raj institutions under the chairmanship of Ashok Mehta.
  • It submitted its report in August 1978 and made 132 recommendations to revive and strengthen the declining Panchayati raj system in the country.
  • Due to the collapse of the Janata Government before the completion of its term, no action could be taken on the recommendations of the Ashok Mehta committee at the central level.
  • However, the three states of Karnataka, West Bengal and Andhra Pradesh took steps to revitalise the Panchayati raj, keeping in view some of the recommendations of the Ashok Mehta Committee.
  • L. M. Singhvi Committee-
  • In 1986, the Rajiv Gandhi government appointed a committee to prepare a concept paper on ‘Revitalisation of Panchayati Raj Institutions for Democracy and Development’ under the chairmanship of L M Singhvi.
  • G. V. K. Rao Committee:
  • The Committee to review the existing Administrative Arrangements for Rural Development and Poverty Alleviation Programmes under the chairmanship of G.V.K. Rao was appointed by the Planning Commission in 1985.

Question 76

RPF SI 2022• CBT

Which of the following combinations is an example of the balanced meal?

  1. AOption (a)

    Rice, chips, cold drink

  2. BOption (b)

    Burger, chips, cold drink

  3. COption (c)

    Roti, vegetables, cold drink

  4. DOption (d)

    Roti, pulses, vegetables

View answer & explanation

Correct answer

Answer: (d)D.

Roti, pulses, vegetables

Why this answer is correct

The correct answer is "Roti, pulses, vegetables".

Key Points

  • A healthy diet is one that enhances or maintains general health.
  • The body receives the key nutrients it needs from a balanced diet, including proper amounts of hydration, macronutrients like protein, micronutrients like vitamins, and fibre.
  • Fruits, vegetables, whole grains, and little to no processed food or beverages with added sugar can all be found in a healthy diet.
  • A combination of plant-based and animal-based foods can satisfy dietary needs, though vegans must obtain their vitamin B12 from sources other than plants.

Additional Information

  • By consuming roughly the same number of calories that your body requires, you can maintain a healthy weight.
  • Limit your fat intake to no more than 30% of your total daily calories, and choose unsaturated fats over saturated fats. Avoid trans fats.
  • Consume 400 grams or more of fruits and vegetables every day (not counting potatoes, sweet potatoes, cassava and other starchy roots). Nuts, whole grains, and legumes (such as lentils and beans) are also components of a balanced diet.

Question 77

RPF SI 2022• CBT

The following question is based on the given seven, 3-digit numbers.

(Left) 621, 443, 227, 316, 625, 118, 231 (Right)

(For example, 456 ∶ 6 = digit in unit's place, 5 = digit in ten's place,4 = digit in hundred's place)

NOTE - All operations to be done from left to right.

If 5 is added to the digit in ten's place of each number and 1 is subtracted from the digit in unit's place of each number, which digit will be repeated the greatest number of times in the transformed number series thus formed?

  1. AOption (a)

    7

  2. BOption (b)

    4

  3. COption (c)

    2

  4. DOption (d)

    6

View answer & explanation

Correct answer

Answer: (d)D.

6

Why this answer is correct

Given:

621, 443, 227, 316, 625, 118, 231

By applying operation of,

5 is added to the digit in ten's place of each number and 1 is subtracted from the digit in unit's place of each number. We got,

Here, 6 digit will be repeated the greatest number of times ( Five times ) in the transformed number series thus formed.

Hence, '6' is the correct answer.

Question 78

RPF SI 2022• CBT

A statement is given followed by two arguments I and II. Read the statement and the arguments carefully and select the appropriate answer from the given options.

Statement:

Use of re-usable cloth bags for shopping will help in reducing pollution caused by indiscriminate use of plastic bags.

Arguments:

I. The government has banned the use of single-use plastic from 1 July 2022.

II. Cloth bags are eco-friendly since they are re-usable and can be made from scrap fabric that would otherwise go to landfills.

  1. AOption (a)

    Both arguments I and II weaken the statement

  2. BOption (b)

    Both arguments I and II strengthen the statement

  3. COption (c)

    Argument I weakens, while argument II strengthens the statement

  4. DOption (d)

    Argument II weakens, while argument I strengthens the statement

View answer & explanation

Correct answer

Answer: (b)B.

Both arguments I and II strengthen the statement

Why this answer is correct

Statement:

Use of re-usable cloth bags for shopping will help in reducing pollution caused by indiscriminate use of plastic bags.

Arguments:

I. The government has banned the use of single-use plastic from 1 July 2022. → strengthen the statement

  • Banning of single-use plastic help in reducing pollution. As It control proliferation of plastic bags. So the Argument l  is supporting the statement. Hence it is True and strengthen the statement.

II. Cloth bags are eco-friendly since they are re-usable and can be made from scrap fabric that would otherwise go to landfills. → strengthen the statement

  • As reusable Cloth bags which biodegrade in very less time  that can break down naturally and there disposition also very easy as ether go for landfill or fire burning. So the Argument ll  is supporting the statement. Hence it is True and strengthen the statement.

Hence, Both arguments I and II strengthen the statement.

Question 79

RPF SI 2022• CBT

Mahindra & Mahindra Financial Services Limited is an Indian rural non-banking financial company headquartered in _______.

  1. AOption (a)

    Kerala

  2. BOption (b)

    Mumbai

  3. COption (c)

    Goa

  4. DOption (d)

    Lucknow

View answer & explanation

Correct answer

Answer: (b)B.

Mumbai

Why this answer is correct

The correct answer is Mumbai.

Key Points

  • Mahindra & Mahindra Financial Services Limited (MMFSL) is an Indian rural non-banking financial company headquartered in Mumbai.
  • It is amongst the top tractor financers in India, with 1000+ offices across the country.
  • Mahindra Finance started on 1 January 1991, as Maxi Motors Financial Services Limited.
  • They received the certificate of commencement of business on 19 February 1991.
  • On 3 November 1992, Mahindra Finance changed its name to Mahindra & Mahindra Financial Services Limited.
  • Mahindra Finance is registered with the Reserve Bank of India as an asset finance, deposit-taking NBFC.

Additional Information

  • The National Institute for the Visually Handicapped(NIVH) is situated at Dehradun, Uttarakhand.
  • This organization works under the administrative control of the Department of Empowerment of Persons with Disabilities (Divyangjan), Ministry of Social Justice and Empowerment, Government of India.
  • NIVH is engaged in training visually challenged persons and is also engaged in the production of Braille literature, Aids, and Appliances for the visually handicapped.
  • National Institute for Orthopaedically Handicapped, Kolkata.
  • ​Providing services to the Orthopaedically Handicapped population under the training of Physiotherapists, Occupational Therapists, Orthotists & Prosthetists, Employment & Placement Officers, and Vocational Counsellor, etc.
  • Conduct and funded research in all aspects related to the rehabilitation of the Orthopaedically handicapped.
  • The National Institute of Mentally Handicapped is located in Hyderabad.
  • The Institute was established in 1978.
  • The objective of the institute is "Human Resource Development to develop manpower for providing services to the Orthopaedically Handicapped population".
  • The Ali Yavar Jung National Institute for Hearing Handicapped, in Mumbai, has its regional centres in New Delhi, Kolkata, Hyderabad and Bhubaneswar.
  • These centres will be able to give details about the programmes available in the country. The Rehabilitation Council of India in New Delhi also can be contacted to get the details.
  • The Welfare departments in the states and the Rehabilitation Centres run by the states can be contacted to find out about the facilities available in a particular area.

Question 80

RPF SI 2022• CBT

In triangle ABC, if the angles are in the ratio 4 ∶ 3 ∶ 5, find the angles.

  1. AOption (a)

    20°, 15°, 25°

  2. BOption (b)

    20°, 50°, 70°

  3. COption (c)

    60°, 45°, 75°

  4. DOption (d)

    40°, 30°, 50°

View answer & explanation

Correct answer

Answer: (c)C.

60°, 45°, 75°

Why this answer is correct

Shortcut Trick

Sum of ratio parts = 4 + 3 + 5 = 12 units.

Total sum of angles in a triangle = 180°.

1 unit = 180° ÷ 12 = 15°.

Angles = (4 × 15°), (3 × 15°), (5 × 15°) = 60°, 45°, 75°.

∴ The correct answer is 60°, 45°, 75°.

Alternate Method

Given: The angles of triangle ABC are in the ratio 4 : 3 : 5.

Formula Used: Sum of all interior angles of a triangle = 180°.

Let the three angles be 4x, 3x, and 5x.

⇒ 4x + 3x + 5x = 180°

⇒ 12x = 180°

⇒ x = 180° ÷ 12

⇒ x = 15°

⇒ First angle = 4 × 15° = 60°

⇒ Second angle = 3 × 15° = 45°

⇒ Third angle = 5 × 15° = 75°

∴ The correct answer is 60°, 45°, 75°.

Additional Information

Angle Sum Property

The sum of all interior angles of any triangle is always 180&