RPF SI Previous Year Questions Set 9
- The book “The Unquiet River” was authored by
A. Ramachandra Guha
B. Arundhati Roy
C. Amitav Ghosh
D. Meghnad Desai
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Correct: Option A. Explanation: “The Unquiet River” is a 2019 historical study of the Yamuna by noted historian Ramachandra Guha.- Which Indian state has the largest notified forest area according to India State of Forest Report 2021?
A. Arunachal Pradesh
B. Madhya Pradesh
C. Maharashtra
D. Chhattisgarh
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Correct: Option B. Explanation: MP retains the top slot with ~77,400 km² recorded forest, followed by Arunachal.- The 2023 G-20 Summit under India’s presidency was held in
A. Bengaluru
B. New Delhi
C. Mumbai
D. Gandhinagar
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Correct: Option B. Explanation: The Leaders’ Summit took place at Bharat Mandapam, New Delhi on 9-10 Sept 2023.- “Project 75-I” of Indian Navy relates to
A. Aircraft carriers
B. Conventional submarines
C. Stealth frigates
D. Survey ships
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Correct: Option B. Explanation: P-75I is the ₹43k cr plan for six new-generation conventional submarines with AIP.- The monetary policy function “reverse repo” means RBI
A. borrowing from banks at a fixed rate
B. lending to banks at Bank Rate
C. buying dollars from exporters
D. selling dated securities
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Correct: Option A. Explanation: In reverse repo RBI absorbs surplus liquidity by borrowing from banks; collateral is G-Sec.- “Kambala” is a traditional buffalo race of which state?
A. Kerala
B. Tamil Nadu
C. Karnataka
D. Andhra Pradesh
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Correct: Option C. Explanation: Kambala is held in the coastal districts of Karnataka during Nov–Mar.- Which planet was demoted to “dwarf planet” status in 2006?
A. Neptune
B. Pluto
C. Ceres
D. Eris
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Correct: Option B. Explanation: IAU reclassified Pluto as a dwarf planet on 24 Aug 2006.- India’s first bullet-train corridor (Mumbai–Ahmedabad) uses the
A. Russian gauge
B. Indian broad gauge
C. Standard gauge (1435 mm)
D. Metre gauge
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Correct: Option C. Explanation: Japanese Shinkansen E5 Series runs on standard gauge for 320 km/h operations.- A chair sold for ₹1,530 gives a 15 % gain. The cost price is
A. ₹1,300
B. ₹1,330
C. ₹1,350
D. ₹1,400
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Correct: Option B. Explanation: CP = 1530×100/115 = ₹1,330.43 ≈ ₹1,330.- The LCM of 24, 36 and 60 is
A. 180
B. 240
C. 360
D. 720
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Correct: Option C. Explanation: 24=2³×3, 36=2²×3², 60=2²×3×5 ⇒ LCM=2³×3²×5 = 360.- A train 180 m long crosses a pole in 9 s. Its speed in km/h is
A. 60
B. 72
C. 75
D. 80
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Correct: Option B. Explanation: Speed = 180 m /9 s = 20 m/s = 20×18/5 = 72 km/h.- If 3^(2x–1) = 81, then x equals
A. 2
B. 2.5
C. 3
D. 4
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Correct: Option B. Explanation: 81=3⁴ ⇒ 2x–1=4 ⇒ x=5/2=2.5.- Compound interest on ₹10,000 at 10 % p.a. compounded half-yearly for 1 year is
A. ₹1,000
B. ₹1,025
C. ₹1,050
D. ₹1,102.50
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Correct: Option B. Explanation: Rate per half-year = 5 %, periods = 2. A = 10000(1.05)² = 11025 ⇒ CI = ₹1,025.- The mean of 11 numbers is 60. If one number 45 is removed, the new mean is
A. 61
B. 61.5
C. 62
D. 63
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Correct: Option B. Explanation: Total = 11×60 = 660; new total 615, new mean 615/10 = 61.5.- A certain sum amounts to ₹11,200 in 2 years and ₹12,544 in 3 years at compound interest annually. The rate is
A. 8 %
B. 10 %
C. 12 %
D. 15 %
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Correct: Option C. Explanation: Interest in 3rd year = 12544 – 11200 = 1344; rate = 1344/11200 = 0.12 = 12 %.- Find the odd one out: 121, 169, 289, 361, 441
A. 121
B. 289
C. 361
D. 441
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Correct: Option D. Explanation: All are perfect squares of odd primes except 441 (=21², 21 not prime).- If TOUR is coded as 1234 and LATE as 5678, then ROUTE is
A. 41235
B. 41325
C. 43125
D. 41352
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Correct: Option A. Explanation: Letter-to-digit mapping consistent: R=4,O=1,U=2,T=3,E=5 ⇒ ROUTE=41235.- Select the related word: Doctor : Hospital :: Chef : ?
A. Kitchen
B. Restaurant
C. Hotel
D. Diner
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Correct: Option B. Explanation: Workplace relation—chef’s primary workplace is restaurant (most specific).- A watch reads 4:30. If the minute hand points South-East, in which direction does the hour hand point?
A. North-West
B. South-West
C. North-East
D. South
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Correct: Option A. Explanation: At 4:30 hour hand is halfway between 4 & 5; if 6 is SE, 3 is NE, 12 is NW, hence hour hand points NW.- In the series 2, 5, 10, 17, 26, ? the next term is
A. 35
B. 36
C. 37
D. 38
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Correct: Option C. Explanation: Differences increase by 2: +3, +5, +7, +9, next +11 ⇒ 26+11=37.- The gas used in the “Soda-acid” fire extinguisher is
A. CO₂
B. N₂
C. O₂
D. SO₂
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Correct: Option A. Explanation: Reaction NaHCO₃ + H₂SO₄ → CO₂ gas forms the blanketing foam.- Human blood pH is maintained around
A. 6.8
B. 7.0
C. 7.4
D. 8.0
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Correct: Option C. Explanation: Arterial blood pH ≈ 7.35–7.45; 7.4 is the set-point.- Which of the following is NOT a vector quantity?
A. Momentum
B. Force
C. Work
D. Velocity
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Correct: Option C. Explanation: Work = F·d, a scalar product; others have direction.- The process of conversion of sugar into alcohol is called
A. Oxidation
B. Fermentation
C. Esterification
D. Saponification
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Correct: Option B. Explanation: Yeast anaerobically ferments sugar to ethanol + CO₂.- Which metal forms a protective oxide layer called “passive film” that prevents further corrosion?
A. Iron
B. Copper
C. Aluminium
D. Silver
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Correct: Option C. Explanation: Al instantly forms Al₂O₃ film that shields the bulk metal.
BETA
