RRB NTPC PYQ Set 8
General Awareness
-
The “Duckworth-Lewis-Stern” rule is associated with which sport?
- A. Football
- B. Hockey
- C. Cricket
- D. Tennis
Answer
Correct: Option C. Explanation: The DLS method is a mathematical formula used to reset targets in rain-affected limited-overs cricket matches. -
Who is the author of the book “The Accidental Prime Minister”?
- A. Sanjaya Baru
- B. P. C. Parakh
- C. Vinod Rai
- D. Natwar Singh
Answer
Correct: Option A. Explanation: Sanjaya Baru, former media adviser to PM Manmohan Singh, penned the 2014 memoir. -
India’s first indigenously developed COVID-19 vaccine is:
- A. Covaxin
- B. Covishield
- C. Sputnik V
- D. ZyCoV-D
Answer
Correct: Option A. Explanation: Covaxin (BBV152) was developed by Bharat Biotech-ICMR and approved for emergency use in January 2021. -
Which river forms the “Sundarbans” delta?
- A. Brahmaputra
- B. Ganga-Brahmaputra
- C. Godavari
- D. Mahanadi
Answer
Correct: Option B. Explanation: The combined flow of Ganga & Brahmaputra creates the world’s largest mangrove delta shared by India & Bangladesh. -
The World Bank headquarters is located at:
- A. Geneva
- B. Washington D.C.
- C. New York
- D. Paris
Answer
Correct: Option B. Explanation: Both the World Bank & IMF are headquartered in Washington D.C., USA. -
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
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. -
The “Kala Ghoda Arts Festival” is held annually in:
- A. Kolkata
- B. Mumbai
- C. Pune
- D. Goa
Answer
Correct: Option B. Explanation: The nine-day street art carnival takes place in Mumbai’s historic Kala Ghoda precinct every February. -
India’s first solar-powered railway station is:
- A. Guwahati
- B. Coimbatore
- C. Jaipur
- D. Anand Vihar (Delhi)
Answer
Correct: Option A. Explanation: Guwahati railway station (NFR) became fully solar-powered in 2017 with 2352 solar panels.
Mathematics
-
If 25% of x = 45, then 4/9 of x is:
- A. 60
- B. 72
- C. 80
- D. 90
Answer
Correct: Option C. Explanation: 0.25x = 45 → x = 180; 4/9 × 180 = 80. -
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
Answer
Correct: Option C. Explanation: Speed = 150 m / 9 s = 50/3 m/s = (50/3) × (18/5) = 60 km/h. -
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
Answer
Correct: Option C. Explanation: Rate per half-year = 5%, periods = 3. Amount = 4000(1.05)³ = 4630.5 → CI = 630. -
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
Answer
Correct: Option C. Explanation: Total = 11×42 = 462; sum first 6 = 222; sum last 6 = 276. 6th number = 222+276 – 462 = 48. -
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
Answer
Correct: Option A. Explanation: When SP is same & gain/loss % equal, net loss % = (20²)/100 = 4%. -
If x + 1/x = 5, then x² + 1/x² is:
- A. 23
- B. 25
- C. 27
- D. 29
Answer
Correct: Option A. Explanation: Square both sides: x² + 2 + 1/x² = 25 → x² + 1/x² = 23. -
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
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
-
In a certain code, COMPUTER is written as OCPMTURE. How is TELEPHONE written in that code?
- A. ELETPOHNE
- B. ETLEPHNOE
- C. ETELPOHNE
- D. ETLEPOHNE
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. -
Select the odd one out:
- A. 27
- B. 64
- C. 125
- D. 144
Answer
Correct: Option D. Explanation: 27, 64, 125 are perfect cubes (3³, 4³, 5³); 144 is not. -
If ‘+’ means ‘÷’, ‘÷’ means ‘×’, ‘×’ means ‘–’, and ‘–’ means ‘+’, then 36 × 2 ÷ 4 – 8 + 2 = ?
- A. 18
- B. 24
- C. 26
- D. 30
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.) -
Find the missing term: 2, 6, 12, 20, ?, 42
- A. 28
- B. 30
- C. 32
- D. 36
Answer
Correct: Option B. Explanation: Pattern 1×2, 2×3, 3×4, 4×5, 5×6 = 30, 6×7 = 42. -
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
Answer
Correct: Option A. Explanation: Right triangle: √(8²+6²) = √100 = 10 km.
General Science
-
Which organelle is known as the “powerhouse of the cell”?
- A. Golgi body
- B. Mitochondria
- C. Ribosome
- D. Lysosome
Answer
Correct: Option B. Explanation: Mitochondria produce ATP through aerobic respiration. -
The SI unit of electric resistance is:
- A. Ampere
- B. Volt
- C. Ohm
- D. Coulomb
Answer
Correct: Option C. Explanation: Ohm (Ω) is the derived unit of electrical resistance. -
The process of conversion of sugar into alcohol by yeast is called:
- A. Fermentation
- B. Pasteurisation
- C. Sterilisation
- D. Distillation
Answer
Correct: Option A. Explanation: Anaerobic respiration in yeast produces ethanol and CO₂, termed alcoholic fermentation. -
The lightest gas among the following is:
- A. Helium
- B. Neon
- C. Hydrogen
- D. Nitrogen
Answer
Correct: Option C. Explanation: Hydrogen (H₂) has molar mass 2 g mol⁻¹, lighter than helium (4 g mol⁻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
Answer
Correct: Option B. Explanation: UV-B rays convert 7-dehydrocholesterol to vitamin D₃ in the skin.
BETA
