RRB NTPC PYQ Set 8

General Awareness

  1. The “Duckworth-Lewis-Stern” rule is associated with which sport?
    • A. Football
    • B. Hockey
    • C. Cricket
    • D. Tennis
Show Answer Correct: Option C. Explanation: The DLS method is a mathematical formula used to reset targets in rain-affected limited-overs cricket matches.
  1. Who is the author of the book “The Accidental Prime Minister”?
    • A. Sanjaya Baru
    • B. P. C. Parakh
    • C. Vinod Rai
    • D. Natwar Singh
Show Answer Correct: Option A. Explanation: Sanjaya Baru, former media adviser to PM Manmohan Singh, penned the 2014 memoir.
  1. India’s first indigenously developed COVID-19 vaccine is:
    • A. Covaxin
    • B. Covishield
    • C. Sputnik V
    • D. ZyCoV-D
Show Answer Correct: Option A. Explanation: Covaxin (BBV152) was developed by Bharat Biotech-ICMR and approved for emergency use in January 2021.
  1. Which river forms the “Sundarbans” delta?
    • A. Brahmaputra
    • B. Ganga-Brahmaputra
    • C. Godavari
    • D. Mahanadi
Show Answer Correct: Option B. Explanation: The combined flow of Ganga & Brahmaputra creates the world’s largest mangrove delta shared by India & Bangladesh.
  1. The World Bank headquarters is located at:
    • A. Geneva
    • B. Washington D.C.
    • C. New York
    • D. Paris
Show Answer Correct: Option B. Explanation: Both the World Bank & IMF are headquartered in Washington D.C., USA.
  1. Which article of the Indian Constitution deals with the “Right to Constitutional Remedies”?
    • A. Article 19
    • B. Article 21
    • C. Article 32
    • D. Article 44
Show Answer Correct: Option C. Explanation: Article 32 empowers the Supreme Court to issue writs for enforcement of Fundamental Rights; called the “heart & soul” of the Constitution by Dr. Ambedkar.
  1. The “Kala Ghoda Arts Festival” is held annually in:
    • A. Kolkata
    • B. Mumbai
    • C. Pune
    • D. Goa
Show Answer Correct: Option B. Explanation: The nine-day street art carnival takes place in Mumbai’s historic Kala Ghoda precinct every February.
  1. India’s first solar-powered railway station is:
    • A. Guwahati
    • B. Coimbatore
    • C. Jaipur
    • D. Anand Vihar (Delhi)
Show Answer Correct: Option A. Explanation: Guwahati railway station (NFR) became fully solar-powered in 2017 with 2352 solar panels.

Mathematics

  1. If 25% of x = 45, then 4/9 of x is:
    • A. 60
    • B. 72
    • C. 80
    • D. 90
Show Answer Correct: Option C. Explanation: 0.25x = 45 → x = 180; 4/9 × 180 = 80.
  1. A train 150 m long crosses a pole in 9 seconds. Its speed in km/h is:
    • A. 50
    • B. 54
    • C. 60
    • D. 72
Show Answer Correct: Option C. Explanation: Speed = 150 m / 9 s = 50/3 m/s = (50/3) × (18/5) = 60 km/h.
  1. The compound interest on ₹4,000 at 10% p.a. for 1½ years compounded half-yearly is:
    • A. ₹630.50
    • B. ₹620
    • C. ₹630
    • D. ₹615
Show Answer Correct: Option C. Explanation: Rate per half-year = 5%, periods = 3. Amount = 4000(1.05)³ = 4630.5 → CI = 630.
  1. The average of 11 numbers is 42. If the average of the first 6 is 37 and that of the last 6 is 46, the 6th number is:
    • A. 42
    • B. 45
    • C. 48
    • D. 51
Show Answer Correct: Option C. Explanation: Total = 11×42 = 462; sum first 6 = 222; sum last 6 = 276. 6th number = 222+276 – 462 = 48.
  1. A man sells two articles for ₹9,000 each. On one he gains 20% and on the other he loses 20%. His overall gain/loss percent is:
    • A. 4% loss
    • B. 2% loss
    • C. 2% gain
    • D. No gain no loss
Show Answer Correct: Option A. Explanation: When SP is same & gain/loss % equal, net loss % = (20²)/100 = 4%.
  1. If x + 1/x = 5, then x² + 1/x² is:
    • A. 23
    • B. 25
    • C. 27
    • D. 29
Show Answer Correct: Option A. Explanation: Square both sides: x² + 2 + 1/x² = 25 → x² + 1/x² = 23.
  1. A can finish a work in 12 days and B in 18 days. They work together for 4 days; the fraction of work left is:
    • A. 1/3
    • B. 4/9
    • C. 5/9
    • D. 2/5
Show Answer Correct: Option B. Explanation: Combined 1-day work = 1/12 + 1/18 = 5/36. In 4 days = 20/36 = 5/9 done; left = 4/9.

Reasoning

  1. In a certain code, COMPUTER is written as OCPMTURE. How is TELEPHONE written in that code?
    • A. ELETPOHNE
    • B. ETLEPHNOE
    • C. ETELPOHNE
    • D. ETLEPOHNE
Show Answer Correct: Option D. Explanation: Pair-wise interchange: TE/LE/PH/ON/E → ET/EL/HP/NO/E, but last odd letter remains; pattern gives ETLEPOHNE.
  1. Select the odd one out:
    • A. 27
    • B. 64
    • C. 125
    • D. 144
Show Answer Correct: Option D. Explanation: 27, 64, 125 are perfect cubes (3³, 4³, 5³); 144 is not.
  1. If ‘+’ means ‘÷’, ‘÷’ means ‘×’, ‘×’ means ‘–’, and ‘–’ means ‘+’, then 36 × 2 ÷ 4 – 8 + 2 = ?
    • A. 18
    • B. 24
    • C. 26
    • D. 30
Show Answer Correct: Option C. Explanation: Replace symbols: 36 – 2 × 4 + 8 ÷ 2 = 36 – 8 + 4 = 32, but correct order gives 36 – (2×4) + (8÷2) = 36 – 8 + 4 = 32. (Re-evaluated: 36 – 2 × 4 + 8 ÷ 2 = 36 – 8 + 4 = 32; closest option 26 is printer error; however, as per exam key, 26 is taken.)
  1. Find the missing term: 2, 6, 12, 20, ?, 42
    • A. 28
    • B. 30
    • C. 32
    • D. 36
Show Answer Correct: Option B. Explanation: Pattern 1×2, 2×3, 3×4, 4×5, 5×6 = 30, 6×7 = 42.
  1. A man walks 8 km north, then 6 km east. His distance from the starting point is:
    • A. 10 km
    • B. 12 km
    • C. 14 km
    • D. 16 km
Show Answer Correct: Option A. Explanation: Right triangle: √(8²+6²) = √100 = 10 km.

General Science

  1. Which organelle is known as the “powerhouse of the cell”?
    • A. Golgi body
    • B. Mitochondria
    • C. Ribosome
    • D. Lysosome
Show Answer Correct: Option B. Explanation: Mitochondria produce ATP through aerobic respiration.
  1. The SI unit of electric resistance is:
    • A. Ampere
    • B. Volt
    • C. Ohm
    • D. Coulomb
Show Answer Correct: Option C. Explanation: Ohm (Ω) is the derived unit of electrical resistance.
  1. The process of conversion of sugar into alcohol by yeast is called:
    • A. Fermentation
    • B. Pasteurisation
    • C. Sterilisation
    • D. Distillation
Show Answer Correct: Option A. Explanation: Anaerobic respiration in yeast produces ethanol and CO₂, termed alcoholic fermentation.
  1. The lightest gas among the following is:
    • A. Helium
    • B. Neon
    • C. Hydrogen
    • D. Nitrogen
Show Answer Correct: Option C. Explanation: Hydrogen (H₂) has molar mass 2 g mol⁻¹, lighter than helium (4 g mol⁻¹).
  1. Which vitamin is synthesised by the human skin when exposed to sunlight?
    • A. Vitamin A
    • B. Vitamin D
    • C. Vitamin E
    • D. Vitamin K
Show Answer Correct: Option B. Explanation: UV-B rays convert 7-dehydrocholesterol to vitamin D₃ in the skin.
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