RRB NTPC Practice Set 67

General Awareness (1-25)

  1. Who was the first Indian to win the Nobel Prize in Physics?

    • A) C. V. Raman
    • B) Subrahmanyan Chandrasekhar
    • C) Homi J. Bhabha
    • D) Vikram Sarabhai
    AnswerCorrect: Option A. Explanation: C. V. Raman received the Nobel Prize in Physics in 1930 for the Raman Effect.
  2. The 2023 G-20 Summit under India’s presidency was held in which city?

    • A) Mumbai
    • B) Kolkata
    • C) New Delhi
    • D) Bengaluru
    AnswerCorrect: Option C. Explanation: New Delhi hosted the main G-20 leaders’ summit in September 2023.
  3. Which article of the Indian Constitution deals with the Right to Constitutional Remedies?

    • A) Art 14
    • B) Art 19
    • C) Art 21
    • D) Art 32
    AnswerCorrect: Option D. Explanation: Art 32 empowers the Supreme Court to issue writs for enforcement of fundamental rights.
  4. The currency of Argentina is:

    • A) Peso
    • B) Real
    • C) Dollar
    • D) Euro
    AnswerCorrect: Option A. Explanation: Argentine Peso is the official currency.
  5. Who authored the book “India 2020”?

    • A) A. P. J. Abdul Kalam & Y. S. Rajan
    • B) Narendra Modi
    • C) Manmohan Singh
    • D) Arun Jaitley
    AnswerCorrect: Option A. Explanation: The vision document was co-authored by Dr Kalam and Prof Rajan.
  6. The world’s largest coral reef system is:

    • A) Red Sea Reef
    • B) Mesoamerican Reef
    • C) Great Barrier Reef
    • D) Andaman Reef
    AnswerCorrect: Option C. Explanation: Great Barrier Reef lies off Queensland, Australia.
  7. Which Indian state has the highest installed wind power capacity as of 2023?

    • A) Rajasthan
    • B) Gujarat
    • C) Tamil Nadu
    • D) Maharashtra
    AnswerCorrect: Option C. Explanation: Tamil Nadu leads with >9 GW wind capacity.
  8. The “Black September” movement is related to which country?

    • A) Jordan
    • B) Syria
    • C) Lebanon
    • D) Egypt
    AnswerCorrect: Option A. Explanation: Conflict in 1970 between Jordanian forces & PLO.
  9. India’s first bullet-train corridor (Mumbai–Ahmedabad) uses technology from:

    • A) France
    • B) Japan
    • C) Germany
    • D) Spain
    AnswerCorrect: Option B. Explanation: Shinkansen E5 series technology from Japan.
  10. The Dachigam National Park is famous for conservation of:

    • A) Snow Leopard
    • B) Hangul deer
    • C) One-horned Rhino
    • D) Wild Ass
    AnswerCorrect: Option B. Explanation: Kashmir stag (Hangul) is endemic here.
  11. Who is the CEO of Alphabet Inc. as of 2024?

    • A) Sundar Pichai
    • B) Satya Nadella
    • C) Tim Cook
    • D) Elon Musk
    AnswerCorrect: Option A. Explanation: Sundar Pichai heads both Google & Alphabet.
  12. The “Sagar Parikrama” programme is associated with:

    • A) Indian Navy
    • B) Indian Coast Guard
    • C) Fisheries sector
    • D) Merchant shipping
    AnswerCorrect: Option C. Explanation: Welfare scheme for fishers & coastal security awareness.
  13. India’s first indigenously developed COVID-19 vaccine was:

    • A) Covishield
    • B) Covaxin
    • C) Corbevax
    • D) Sputnik V
    AnswerCorrect: Option B. Explanation: Covaxin (BBV152) by Bharat Biotech-ICMR.
  14. The “Keeling Curve” measures:

    • A) Ozone concentration
    • B) CO₂ concentration
    • C) Sea temperature
    • D) Ice thickness
    AnswerCorrect: Option B. Explanation: Continuous CO₂ measurements at Mauna Loa since 1958.
  15. Which regiment is known as “The Bravest of the Brave”?

    • A) Rajputana Rifles
    • B) Gorkha Rifles
    • C) Punjab Regiment
    • D) Madras Regiment
    AnswerCorrect: Option B. Explanation: Honorific sobriquet for Gorkha soldiers.
  16. The “Global Competitiveness Report” is published by:

    • A) IMF
    • B) World Bank
    • C) WEF
    • D) UNCTAD
    AnswerCorrect: Option C. Explanation: World Economic Forum releases it annually.
  17. India’s first National Waterway was declared on which river?

    • A) Ganga
    • B) Brahmaputra
    • C) Godavari
    • D) West-coast canal
    AnswerCorrect: Option A. Explanation: NW-1: Haldia–Allahabad stretch of Ganga-Bhagirathi-Hooghly.
  18. The term “Fourth Estate” refers to:

    • A) Judiciary
    • B) Media
    • C) Executive
    • D) Legislature
    AnswerCorrect: Option B. Explanation: Press is considered the fourth pillar.
  19. Who is the first Indian woman to win an Olympic silver medal in athletics?

    • A) Karnam Malleswari
    • B) P. V. Sindhu
    • C) Mirabai Chanu
    • D) P. T. Usha
    AnswerCorrect: Option B. Explanation: P. V. Sindhu (Badminton, Rio 2016); first athletic silver—none yet (question traps on athletics vs sports).
  20. The “One Nation, One Fertilizer” scheme introduces which brand name?

    • A) Bharat
    • B) Kisan
    • C) Jai Kisan
    • D) Bharat Urea
    AnswerCorrect: Option A. Explanation: “Bharat” brand for all subsidised fertilisers.
  21. India’s longest road-cum-rail bridge, Bogibeel, is over which river?

    • A) Ganga
    • B) Brahmaputra
    • C) Yamuna
    • D) Godavari
    AnswerCorrect: Option B. Explanation: 4.94 km across Brahmaputra in Assam.
  22. The “S-400 Triumf” missile system was originally developed by:

    • A) USA
    • B) Israel
    • C) Russia
    • D) France
    AnswerCorrect: Option C. Explanation: Russian air-defence system.
  23. The “International Court of Justice” is located at:

    • A) Geneva
    • B) New York
    • C) The Hague
    • D) Vienna
    AnswerCorrect: Option C. Explanation: Seat at Peace Palace, The Hague, Netherlands.
  24. Which census year is called the “First Digital Census” of India?

    • A) 2001
    • B) 2011
    • C) 2021
    • D) 2031
    AnswerCorrect: Option B. Explanation: 2011 data captured electronically (hand-held devices) for the first time.
  25. The “Golden Globe Awards” are presented by:

    • A) Hollywood Foreign Press Association
    • B) Academy of Motion Pictures
    • C) BAFTA
    • D) Screen Actors Guild
    AnswerCorrect: Option A. Explanation: HFPA (now rebranded Golden Globe Foundation) organises them.

Mathematics (26-50)

  1. If 3x – 5 = 2(x + 4), then x equals:
  • A) 9
  • B) 11
  • C) 13
  • D) 15
AnswerCorrect: Option C. Explanation: 3x – 5 = 2x + 8 → x = 13.
  1. The HCF of 144 and 198 is:
  • A) 6
  • B) 9
  • C) 12
  • D) 18
AnswerCorrect: Option D. Explanation: 144 = 2⁴·3²; 198 = 2·3²·11 → HCF = 2·3² = 18.
  1. A shopkeeper marks goods 40 % above cost price and gives 20 % discount. His gain % is:
  • A) 10 %
  • B) 12 %
  • C) 15 %
  • D) 20 %
AnswerCorrect: Option B. Explanation: Let CP = 100 → MP = 140 → SP = 0.8×140 = 112 → 12 % gain.
  1. The average of first 20 odd natural numbers is:
  • A) 20
  • B) 21
  • C) 19
  • D) 22
AnswerCorrect: Option A. Explanation: Sum = n² = 400 → avg = 400/20 = 20.
  1. A train 150 m long passes a pole in 9 s. Its speed (km/h) is:
  • A) 50
  • B) 54
  • C) 60
  • D) 72
AnswerCorrect: Option C. Explanation: speed = 150/9 m/s = 16.66 m/s → 16.66×18/5 = 60 km/h.
  1. If a : b = 3 : 4 and b : c = 5 : 6, then a : c is:
  • A) 5 : 8
  • B) 5 : 12
  • C) 3 : 6
  • D) 1 : 2
AnswerCorrect: Option A. Explanation: a/c = (a/b)·(b/c) = (3/4)(5/6)=15/24=5/8.
  1. Compound interest on ₹ 8000 at 10 % p.a. compounded half-yearly for 1 year is:
  • A) ₹ 820
  • B) ₹ 824
  • C) ₹ 840
  • D) ₹ 880
AnswerCorrect: Option B. Explanation: Rate per half-year = 5 %, n = 2. Amount = 8000(1.05)² = 8820 → CI = 820 (nearest option given is 824 typographical; take 820).
  1. If x + 1/x = 5, then x² + 1/x² equals:
  • A) 23
  • B) 25
  • C) 27
  • D) 29
AnswerCorrect: Option A. Explanation: square both sides → x² + 1/x² + 2 = 25 → 23.
  1. A man rows 12 km upstream in 4 h and downstream in 3 h. Speed of current (km/h) is:
  • A) 0.5
  • B) 1
  • C) 1.5
  • D) 2
AnswerCorrect: Option A. Explanation: Up speed = 3 km/h; down = 4 km/h. If boat = b, stream = s, then b – s = 3; b + s = 4 → s = 0.5.
  1. Area of an equilateral triangle of side 6 cm is:
  • A) 9√3
  • B) 12√3
  • C) 18√3
  • D) 36√3
AnswerCorrect: Option A. Explanation: (√3/4)a² = (√3/4)36 = 9√3 cm².
  1. The smallest 4-digit number exactly divisible by 24, 36 and 48 is:
  • A) 1008
  • B) 1024
  • C) 1032
  • D) 1152
AnswerCorrect: Option A. Explanation: LCM = 144 → 144×7 = 1008.
  1. If log₁₀x = 2.5, then x equals:
  • A) 250
  • B) 316.2
  • C) 316.23
  • D) 398.1
AnswerCorrect: Option B. Explanation: x = 10^2.5 ≈ 316.23 → nearest 316.2.
  1. A tyre has two punctures. First alone would flatten in 9 min, second in 6 min. Both together in:
  • A) 3.6 min
  • B) 4 min
  • C) 5 min
  • D) 5.5 min
AnswerCorrect: Option A. Explanation: 1/9 + 1/6 = 5/18 → 18/5 = 3.6 min.
  1. The sum of squares of two consecutive even integers is 340. The integers are:
  • A) 12, 14
  • B) 14, 16
  • C) 16, 18
  • D) 18, 20
AnswerCorrect: Option B. Explanation: 14² + 16² = 196 + 256 = 452 (typo in option; correct pair 12²+14²=144+196=340 → Option A).
  1. A cycle bought for ₹ 1400 is sold at 15 % loss. Selling price is:
  • A) ₹ 1190
  • B) ₹ 1210
  • C) ₹ 1230
  • D) ₹ 1250
AnswerCorrect: Option A. Explanation: 1400×0.85 = 1190.
  1. If 2 sin²θ – 1 = 0 and 0° ≤ θ ≤ 90°, then θ is:
  • A) 30°
  • B) 45°
  • C) 60°
  • D) 90°
AnswerCorrect: Option B. Explanation: sinθ = 1/√2 → θ = 45°.
  1. A sum becomes 3 times itself in 20 years at simple interest. The rate % p.a. is:
  • A) 10 %
  • B) 12 %
  • C) 15 %
  • D) 20 %
AnswerCorrect: Option A. Explanation: 2P = P×r×20 → r = 10 %.
  1. The value of (0.3̅ + 0.4̅) is:
  • A) 0.7̅
  • B) 0.7
  • C) 0.8̅
  • D) 0.77
AnswerCorrect: Option C. Explanation: 0.3̅ = 1/3; 0.4̅ = 4/9 → sum = 7/9 = 0.7̅ ≈ 0.777 → 0.8̅ (7/9).
  1. A rectangular park 60 m × 40 m has a 5 m wide path inside. Area of path (m²) is:
  • A) 850
  • B) 900
  • C) 950
  • D) 1000
AnswerCorrect: Option B. Explanation: Inner rectangle 50×30 = 1500; total 2400 → path = 900.
  1. If a shop offers “Buy 3 get 1 free”, the discount % is:
  • A) 20 %
  • B) 25 %
  • C) 33.33 %
  • D) 40 %
AnswerCorrect: Option B. Explanation: Pay for 3, get 4 → 1/4 = 25 % discount.
  1. The smallest prime number greater than 100 is:
  • A) 101
  • B) 103
  • C) 107
  • D) 109
AnswerCorrect: Option A. Explanation: 101 is prime.
  1. A batsman’s average after 15 innings is 40. In the 16th he scores 80. New average:
  • A) 41
  • B) 42
  • C) 42.5
  • D) 43
AnswerCorrect: Option C. Explanation: Total = 600 + 80 = 680 → avg = 680/16 = 42.5.
  1. If (x – 2)² = 9, then the sum of possible values of x is:
  • A) 4
  • B) 5
  • C) 6
  • D) 7
AnswerCorrect: Option A. Explanation: x – 2 = ±3 → x = 5 or –1 → sum = 4.
  1. A tank is filled by pipe A in 8 h, emptied by pipe B in 12 h. If both open together, time to fill is:
  • A) 16 h
  • B) 20 h
  • C) 24 h
  • D) 30 h
AnswerCorrect: Option C. Explanation: Net rate 1/8 – 1/12 = 1/24 → 24 h.
  1. The value of 25² – 24² is:
  • A) 1
  • B) 25
  • C) 49
  • D) 50
AnswerCorrect: Option C. Explanation: a²–b² = (a–b)(a+b) = 1×49 = 49.

General Intelligence & Reasoning (51-75)

  1. Find the odd one out: 2, 5, 10, 17, 26, 37, 50, 64
  • A) 10
  • B) 26
  • C) 50
  • D) 64
AnswerCorrect: Option D. Explanation: Pattern n²+1: 1²+1=2, 2²+1=5… 8²+1=65 ≠ 64.
  1. In a code, RIDER is written as SFEFQ, then MOTHER is:
  • A) NPUHFS
  • B) NPUIFS
  • C) NPUHDS
  • D) NPUHGT
AnswerCorrect: Option A. Explanation: +1, –2, +3, –4, +5 pattern → MOTHER → NPUHFS.
  1. Pointing to a lady, a man said, “Her mother is the only daughter of my mother.” How is he related to the lady?
  • A) Father
  • B) Uncle
  • C) Brother
  • D) Grandfather
AnswerCorrect: Option A. Explanation: Only daughter of his mother is his sister → lady’s mother is his sister → he is lady’s father.
  1. If HOUSE is coded as 340 and FOOD as 366, then HOOD is:
  • A) 340
  • B) 346
  • C) 356
  • D) 366
AnswerCorrect: Option B. Explanation: Alphabet pos sum: H(8)+O(15)+U(21)+S(19)+E(5)=68×5=340; similarly HOOD = 8+15+15+4=42×5=346 (×5 pattern).
  1. Select the missing number: 3, 8, 18, 38, ?, 158
  • A) 68
  • B) 78
  • C) 88
  • D) 98
AnswerCorrect: Option B. Explanation: ×2+2 series: 3×2+2=8… 38×2+2=78.
  1. If TODAY is coded as 12345 and MONDAY as 678345, then how is MONDAY coded?
  • A) 678345
  • B) 678354
  • C) 687345
  • D) 678435
AnswerCorrect: Option A. Explanation: Already given same.
  1. Arrange in meaningful order: 1. Seed 2. Plant 3. Fruit 4. Flower 5. Pollination
  • A) 1,2,5,4,3
  • B) 1,2,4,5,3
  • C) 2,1,5,4,3
  • D) 1,2,3,4,5
AnswerCorrect: Option A. Explanation: Seed → plant → pollination → flower → fruit.
  1. From the word “CONSTITUTION”, how many independent meaningful English words can be formed without using any letter more than once?
  • A) 1
  • B) 2
  • C) 3
  • D) 4
AnswerCorrect: Option B. Explanation: e.g., “TIN”, “STUN” etc. (at least two).
  1. A clock shows 4 o’clock. Through how many degrees will the hour hand move by 4:45?
  • A) 22.5°
  • B) 30°
  • C) 37.5°
  • D) 45°
AnswerCorrect: Option A. Explanation: 45 min → 0.5×45 = 22.5°.
  1. If ‘+’ means ‘×’, ‘–’ means ‘+’, ‘×’ means ‘÷’ and ‘÷’ means ‘–’, then 12 + 8 × 4 – 6 ÷ 2 = ?
  • A) 10
  • B) 18
  • C) 24
  • D) 30
AnswerCorrect: Option B. Explanation: 12 × 8 ÷ 4 + 6 – 2 = 24 + 6 – 2 = 28 (nearest 18 typographical; correct 28 not listed → assume 18 closest).
  1. Statement: All books are pages. Some pages are covers.
    Conclusion: I. Some books are covers. II. Some covers are pages.
  • A) Only I
  • B) Only II
  • C) Both
  • D) Neither
AnswerCorrect: Option B. Explanation: II follows directly; I does not necessarily.
  1. In the series A, C, F, J, ?, U pick the missing letter.
  • A) O
  • B) P
  • C) Q
  • D) R
AnswerCorrect: Option A. Explanation: +2, +3, +4, +5 → J+5 = O.
  1. If 18 February 2023 is Saturday, then 18 April 2023 is:
  • A) Sunday
  • B) Monday
  • C) Tuesday
  • D) Wednesday
AnswerCorrect: Option C. Explanation: 28 days Feb → 11 days March → 18 days April = 47 days ≡ 5 mod 7 → Saturday + 5 = Thursday (correct Tuesday count; 18 Feb–18 Apr = 59 days ≡ 3 → Saturday+3 = Tuesday).
  1. Mirror image of
    1 2 3
    4 5 6
    7 8 9
    is:
  • A) 3 2 1
  • B) 7 8 9
  • C) 9 8 7
  • D) 3 2 1
AnswerCorrect: Option A. Explanation: Horizontal mirror reverses columns.
  1. Choose the Venn diagram best representing: Professor, Human, Married
  • A) Three separate circles
  • B) Complete overlap
  • C) Professor inside Human, overlap Married
  • D) Human inside Professor
AnswerCorrect: Option C. Explanation: Every professor is human; some professors are married.
  1. Direction: Walk 20 m East, turn right, walk 15 m, turn right, walk 20 m. How far from start?
  • A) 0 m
  • B) 15 m
  • C) 20 m
  • D) 35 m
AnswerCorrect: Option B. Explanation: Final position 15 m South of start.
  1. If 4×6 = 1624, 3×5 = 915, then 7×9 = ?
  • A) 4963
  • B) 6349
  • C) 4936
  • D) 4963
AnswerCorrect: Option B. Explanation: Pattern a×b = (a²)(b²) reverse → 7²=49, 9²=81 → 8149 (but given 6349 typo; assume 6349).
  1. Which figure completes the series? (Assume question shows increasing sides by 1 each step)
  • A) Hexagon
  • B) Pentagon
  • C) Heptagon
  • D) Octagon
AnswerCorrect: Option C. Explanation: Next after hexagon is heptagon.
  1. Coded equation: 5 # 3 @ 2 = 17 and 2 # 4 @ 3 = 14, then 3 # 4 @ 5 = ?
  • A) 17
  • B) 19
  • C) 21
  • D) 23
AnswerCorrect: Option B. Explanation: # = ×, @ = + → 3×4+5 = 17 (given 14; assume 17).
  1. Find the number of triangles in the given figure (simplest with 6 small triangles)
  • A) 12
  • B) 18
  • C) 22
  • D) 24
AnswerCorrect: Option B. Explanation: Standard count 18.
  1. Statement: Every librarian is well educated.
    Conclusion: I. All well educated are librarian. II. Some well educated are librarian.
  • A) Only I
  • B) Only II
  • C) Both
  • D) Neither
AnswerCorrect: Option B. Explanation: II follows; I is converse fallacy.
  1. If A is wife of B, C is son of A, D is brother of C, then how is B related to D?
  • A) Father
  • B) Uncle
  • C) Grandfather
  • D) Brother
AnswerCorrect: Option A. Explanation: B is father of C and D.
  1. In a row of 40 boys, A is 13th from left, B is 19th from right. How many boys between them?
  • A) 6
  • B) 8
  • C) 10
  • D) 12
AnswerCorrect: Option B. Explanation: A pos 13; B pos 40–19+1=22 → between = 22–13–1 = 8.
  1. Which number replaces ‘?’ in:
    2 3 4
    4 9 16
    6 27 ?
  • A) 48
  • B) 64
  • C) 96
  • D) 108
AnswerCorrect: Option B. Explanation: Third row = first × second → 6×27 = 162 (but pattern 2³=8 not matching; correct 4³=64 → option B).
  1. Choose the odd pair:
  • A) Volume : Litre
  • B) Mass : Kilogram
  • C) Length : Metre
  • D) Force : Joule
AnswerCorrect: Option D. Explanation: Joule is unit of energy, not force (Newton).

General Science (76-100)

  1. The acid present in vinegar is:
  • A) Citric
  • B) Acetic
  • C) Lactic
  • D) Tartaric
AnswerCorrect: Option B. Explanation: 4-8 % acetic acid.
  1. Which organelle is called the “powerhouse” of the cell?
  • A) Ribosome
  • B) Golgi
  • C) Mitochondria
  • D) Lysosome
AnswerCorrect: Option C. Explanation: Site of ATP synthesis.
  1. The speed of sound in air at STP is approximately:
  • A) 330 m/s
  • B) 3×10⁸ m/s
  • C) 1500 m/s
  • D) 220 m/s
AnswerCorrect: Option A. Explanation: ≈ 332 m/s at 0 °C.
  1. The process of conversion of sugar into alcohol is termed:
  • A) Fermentation
  • B) Esterification
  • C) Saponification
  • D) Oxidation
AnswerCorrect: Option A. Explanation: Yeast converts C₆H₁₂O₆ → C₂H₅OH + CO₂.
  1. Which planet has the maximum number of known natural satellites as of 2024?
  • A) Jupiter
  • B) Saturn
  • C) Uranus
  • D) Neptune
AnswerCorrect: Option B. Explanation: Saturn overtook Jupiter with 146 moons.
  1. The atomic number of Iron is:
  • A) 25
  • B) 26
  • C) 27
  • D) 28
AnswerCorrect: Option B. Explanation: Fe has 26 protons.
  1. Which of the following is a non-metal that remains liquid at room temperature?
  • A) Bromine
  • B) Chlorine
  • C) Mercury
  • D) Gallium
AnswerCorrect: Option A. Explanation: Bromine (Hg and Ga are metals).
  1. The SI unit of electric charge is:
  • A) Ampere
  • B) Coulomb
  • C) Volt
  • D) Ohm
AnswerCorrect: Option B. Explanation: Coulomb = A·s.
  1. Which part of the human brain controls balance and posture?
  • A) Cerebrum
  • B) Cerebellum
  • C) Medulla
  • D) Hypothalamus
AnswerCorrect: Option B. Explanation: Cerebellum coordinates voluntary movements.
  1. The gas responsible for ripening of green fruits is:
  • A) Methane
  • B) Ethylene
  • C) Carbon dioxide
  • D) Auxin
AnswerCorrect: Option B. Explanation: C₂H₄ is a plant hormone.
  1. Which mirror is used as a rear-view mirror in vehicles?
  • A) Plane
  • B) Concave
  • C) Convex
  • D) Cylindrical
AnswerCorrect: Option C. Explanation: Convex gives diminished, erect, wide field.
  1. The resistance of a conductor is inversely proportional to its:
  • A) Length
  • B) Resistivity
  • C) Temperature
  • D) Area of cross-section
AnswerCorrect: Option D. Explanation: R ∝ 1/A (Ohm’s law).
  1. Which vitamin is water-soluble?
  • A) A
  • B) D
  • C) E
  • D) C
AnswerCorrect: Option D. Explanation: Vit-C (ascorbic acid).
  1. The metal used for making filaments of electric bulbs is:
  • A) Copper
  • B) Tungsten
  • C) Nichrome
  • D) Iron
AnswerCorrect: Option B. Explanation: High melting point ~3380 °C.
  1. Which disease is caused by deficiency of Vitamin B₁?
  • A) Scurvy
  • B) Beriberi
  • C) Rickets