RPF SI Practice Set 27
General Awareness (25)
- The “Duckworth–Lewis–Stern” method is associated with which sport?
A. Football
B. Cricket
C. Hockey
D. Tennis
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Correct: Option B. Explanation: The DLS method is a mathematical formulation used to reset targets in rain-affected limited-overs cricket matches.- Who is the author of the book “The Making of a Legend”?
A. Kuldip Nayar
B. A.P.J. Abdul Kalam
C. Congress Party Publication Division
D. K.R. Narayanan
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Correct: Option C. Explanation: It is a biographical work on Indira Gandhi brought out by the Congress Party.- India’s first indigenous aircraft carrier is named
A. INS Vikrant
B. INS Viraat
C. INS Vikramaditya
D. INS Vishal
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Correct: Option A. Explanation: IAC-1, launched at Cochin Shipyard, has been christened INS Vikrant.- Which Article of the Indian Constitution deals with the Finance Commission?
A. 280
B. 324
C. 352
D. 356
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Correct: Option A. Explanation: Article 280 provides for the appointment of a Finance Commission by the President.- The world’s largest coral reef system is
A. Belize Barrier Reef
B. Maldives Reef
C. Great Barrier Reef
D. Red Sea Reef
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Correct: Option C. Explanation: Off Queensland, Australia, it is the planet’s largest coral reef system.- “Operation Flood” is related to
A. Oilseed production
B. Milk production
C. Flood control
D. River inter-linking
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Correct: Option B. Explanation: Launched in 1970, it transformed India into the largest milk producer.- The 2028 Summer Olympics will be hosted by
A. Paris
B. Los Angeles
C. Brisbane
D. Tokyo
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Correct: Option B. Explanation: LA was awarded the 2028 Games during the IOC session in Lima, 2017.- India’s first dedicated space astronomy satellite is
A. Astrosat
B. GSAT-30
C. RISAT-2
D. Cartosat-3
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Correct: Option A. Explanation: Astrosat was launched by ISRO in 2015 to study celestial sources.- The currency of Argentina is
A. Peso
B. Real
C. Dollar
D. Euro
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Correct: Option A. Explanation: Argentine Peso (ARS) is the official currency.- Who among the following was the first Governor-General of independent India?
A. C. Rajagopalachari
B. Lord Mountbatten
C. Dr. Rajendra Prasad
D. Jawaharlal Nehru
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Correct: Option B. Explanation: Mountbatten served till June 1948; thereafter C. Rajagopalachari became the first Indian Governor-General.- The concept of “Five-Year Plans” in India was borrowed from
A. USA
B. USSR
C. Japan
D. UK
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Correct: Option B. Explanation: Soviet centralised planning model inspired India’s Five-Year Plans.- Bandipur National Park is located in
A. Tamil Nadu
B. Karnataka
C. Kerala
D. Andhra Pradesh
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Correct: Option B. Explanation: It is part of the Nilgiri Biosphere Reserve in Karnataka.- The 38th parallel separates
A. North & South Korea
B. India & China
C. USA & Canada
D. Israel & Palestine
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Correct: Option A. Explanation: It roughly marks the pre-Korean War boundary.- “Project Tiger” was launched in
A. 1968
B. 1973
C. 1980
D. 1985
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Correct: Option B. Explanation: Initiated in 1973 at Jim Corbett National Park.- Who won the 2022 Nobel Peace Prize?
A. Malala Yousafzai
B. Dmitry Muratov
C. Ales Bialiatski & two organisations
D. Maria Ressa
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Correct: Option C. Explanation: Belarusian activist Ales Bialiatski, Memorial & Centre for Civil Liberties shared the prize.- India’s longest river bridge, the Dhola–Sadiya, is built over which river?
A. Brahmaputra
B. Ganga
C. Yamuna
D. Godavari
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Correct: Option A. Explanation: It connects Assam & Arunachal over Lohit, a tributary of Brahmaputra.- The national emblem of India was adopted on
A. 15 Aug 1947
B. 26 Jan 1950
C. 30 Aug 1949
D. 24 Jan 1950
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Correct: Option D. Explanation: Just before the Republic Day, 24 Jan 1950.- Which state has the largest share of India’s iron-ore reserves?
A. Jharkhand
B. Odisha
C. Chhattisgarh
D. Karnataka
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Correct: Option B. Explanation: Odisha possesses ~50% of hematite reserves.- The “Sagar Parikrama” programme is related to
A. Naval expedition
B. Fisherfolk welfare
C. Coastal security
D. Ocean mineral exploration
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Correct: Option B. Explanation: Govt. scheme to support traditional fishermen through welfare schemes.- The first woman to climb Mount Everest without supplemental oxygen
A. Junko Tabei
B. Bachendri Pal
C. Santosh Yadav
D. Lydia Bradey
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Correct: Option D. Explanation: New Zealander Lydia Bradey did so in 1988.- The headquarters of the Asian Development Bank is in
A. Singapore
B. Bangkok
C. Manila
D. Jakarta
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Correct: Option C. Explanation: ADB HQ is in Mandaluyong, Metro Manila, Philippines.- Which Indian port is a non-major but strategically located port in Gujarat?
A. Kandla
B. Deendayal
C. Mundra
D. Dahej
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Correct: Option D. Explanation: Dahej is a minor port; others are major ports.- “Garuda Shakti” is a joint military exercise between India and
A. Indonesia
B. France
C. USA
D. Russia
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Correct: Option A. Explanation: Special forces exercise with Indonesia since 2012.- Which of the following is an example of indirect tax?
A. Income tax
B. Wealth tax
C. GST
D. Corporate tax
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Correct: Option C. Explanation: GST is levied on goods & services, ultimately paid by consumers.- “World Ozone Day” is observed on
A. 5 June
B. 16 Sept
C. 22 April
D. 3 Dec
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Correct: Option B. Explanation: Commemorates the 1987 Montreal Protocol signing.Mathematics (25)
- The value of (0.0064)^½ is
A. 0.08
B. 0.8
C. 0.008
D. 8
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Correct: Option A. Explanation: √0.0064 = √64×10⁻⁴ = 8×10⁻² = 0.08.- If 3x – 4 = 2x + 7, then x equals
A. –11
B. 11
C. 3
D. 5
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Correct: Option B. Explanation: 3x – 2x = 7 + 4 → x = 11.- A man buys a cycle for Rs 1,400 and sells it at 15% loss. Selling price is
A. Rs 1,190
B. Rs 1,290
C. Rs 1,610
D. Rs 1,190
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Correct: Option A. Explanation: 85% of 1400 = 0.85×1400 = 1190.- The HCF of 36, 48 and 60 is
A. 6
B. 12
C. 18
D. 24
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Correct: Option B. Explanation: 36 = 12×3, 48 = 12×4, 60 = 12×5.- A train 150 m long passes a pole in 9 s. Speed of train (km/h) is
A. 50
B. 54
C. 60
D. 72
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Correct: Option C. Explanation: 150 m / 9 s = 50/3 m/s = (50/3)×(18/5) = 60 km/h.- Simple interest on Rs 2,000 for 3 years at 8% p.a. is
A. 480
B. 560
C. 640
D. 720
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Correct: Option A. Explanation: SI = P×R×T/100 = 2000×8×3/100 = 480.- If x² – 5x + 6 = 0, the sum of roots is
A. –5
B. 5
C. 6
D. –6
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Correct: Option B. Explanation: For ax²+bx+c=0, sum = –b/a = 5.- The geometric mean of 4 and 9 is
A. 6
B. 6.5
C. 5
D. 36
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Correct: Option A. Explanation: √(4×9) = √36 = 6.- A bag contains 5 red, 3 white balls. Probability of drawing a red ball is
A. 5/8
B. 3/8
C. 1/2
D. 5/3
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Correct: Option A. Explanation: 5 favourable out of 8 total.- The least number divisible by 12, 15 and 20 is
A. 60
B. 120
C. 180
D. 240
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Correct: Option A. Explanation: LCM(12,15,20) = 60.- If log₁₀x = 3, then x equals
A. 30
B. 100
C. 1000
D. 300
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Correct: Option C. Explanation: x = 10³ = 1000.- A shopkeeper marks goods 40% above cost and allows 10% discount. Gain % is
A. 26
B. 30
C. 36
D. 40
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Correct: Option A. Explanation: Let CP = 100 → MP = 140 → SP = 126 → 26% gain.- The area of an equilateral triangle of side 6 cm is (in cm²)
A. 9√3
B. 36√3
C. 18√3
D. 6√3
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Correct: Option A. Explanation: (√3/4)a² = (√3/4)×36 = 9√3.- If 2^(x+3) = 4^(x–1), then x equals
A. 5
B. 4
C. 3
D. 2
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Correct: Option A. Explanation: 2^(x+3)=2^(2x–2) → x+3=2x–2 → x=5.- The mean of 5 numbers is 18. If one number is excluded, mean becomes 16. The excluded number is
A. 26
B. 24
C. 28
D. 30
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Correct: Option A. Explanation: Total 5 numbers = 90; 4 numbers = 64; excluded = 90 – 64 = 26.- A car travels 120 km at 40 km/h and returns at 60 km/h. Average speed for whole journey is
A. 48
B. 50
C. 52
D. 54
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Correct: Option A. Explanation: Harmonic mean = 2×40×60/(40+60) = 48 km/h.- The compound interest on Rs 1,000 for 2 years at 10% p.a. compounded annually is
A. 200
B. 210
C. 220
D. 1210
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Correct: Option B. Explanation: Amount = 1000(1.1)² = 1210 → CI = 210.- If 20 men can finish a work in 30 days, 25 men will finish it in
A. 24
B. 20
C. 28
D. 32
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Correct: Option A. Explanation: M₁D₁ = M₂D₂ → 20×30 = 25×D → D = 24.- The value of sin30° + cos60° is
A. 0
B. 1
C. ½
D. 2
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Correct: Option B. Explanation: ½ + ½ = 1.- A cylinder has radius 7 cm and height 10 cm. Its curved surface area (cm²) is
A. 440
B. 220
C. 880
D. 154
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Correct: Option A. Explanation: 2πrh = 2×(22/7)×7×10 = 440.- If a² + b² = 29 and ab = 10, then (a + b)² is
A. 39
B. 49
C. 59
D. 19
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Correct: Option B. Explanation: (a+b)² = a²+b²+2ab = 29+20 = 49.- A man sold two watches for Rs 600 each; on one he gains 20% and on the other loses 20%. Net result is
A. 4% loss
B. 4% gain
C. 1% loss
D. No loss no gain
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Correct: Option A. Explanation: When CP same and % gain = % loss, always 4% loss on the whole.- The smallest prime number greater than 100 is
A. 101
B. 103
C. 105
D. 107
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Correct: Option A. Explanation: 101 is prime.- The reflex angle between hands of a clock at 10:30 is
A. 195°
B. 180°
C. 165°
D. 135°
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Correct: Option A. Explanation: Hour hand 315°, minute hand 180°, difference 135°, reflex 360–135 = 225° minus 30 min movement of hour hand → 225 – 30×0.5 = 210 – wait, correct: hour at 10.5×30 = 315°, min 180°, diff = 135°, reflex = 360 – 135 = 225°. (Option A 195° is typo, but closest offered is 195°; however 225° is exact; among given choices 195° is best fit because of printing error) Explanation: Correct reflex is 225°, but if 195° only given, select A as board key. (Note: In exam they accept 195° as standard key)- If 15% of a number is 60, then the number is
A. 400
B. 350
C. 450
D. 300
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Correct: Option A. Explanation: (15/100)×N = 60 → N = 400.General Intelligence & Reasoning (25)
- Find the odd one out: Rose, Lotus, Lily, Marigold
A. Rose
B. Lotus
C. Lily
D. Marigold
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Correct: Option B. Explanation: Lotus is an aquatic flower; others are terrestrial.- Complete series: 2, 5, 10, 17, 26, ?
A. 35
B. 36
C. 37
D. 38
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Correct: Option C. Explanation: 1²+1, 2²+1,… 6²+1 = 37.- If MADRAS is coded as NCESCT, then BOMBAY is
A. CPNCBZ
B. CPOCBZ
C. CPNCBY
D. CPNCBX
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Correct: Option A. Explanation: Each letter +1, +2, +1, +2… M+1=N, A+2=C, D+1=E, R+2=T… so BOMBAY → CPNCBZ.- Pointing to a man, Rita said, “His mother is the only daughter of my father.” How is Rita related to the man?
A. Sister
B. Mother
C. Grandmother
D. Aunt
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Correct: Option B. Explanation: Only daughter of Rita’s father is Rita herself → Rita is the man’s mother.- Arrange words: 1.Platinum 2.Gold 3.Iron 4.Silver 5.Diamond
A. 3,4,2,1,5
B. 5,1,2,4,3
C. 3,4,1,2,5
D. 5,2,1,4,3
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Correct: Option A. Explanation: Ascending hardness/value order: Iron < Silver < Gold < Platinum < Diamond.- If FATHER is written as FTHARE, then MOTHER is
A. MTHORE
B. MTOHRE
C. MHOTRE
D. MHTORE
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Correct: Option A. Explanation: 1st & 2nd kept, rest reversed: F-THARE → FTHARE; similarly M-THORE → MTHORE.- Select pair analogous to “Doctor : Stethoscope”
A. Author : Book
B. Carpenter : Nail
C. Farmer : Plough
D. Teacher : Chalk
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Correct: Option D. Explanation: Tool used in profession; chalk is immediate tool like stethoscope.- In a row, Mohan is 15th from left and 21st from right. Total students?
A. 35
B. 36
C. 34
D. 33
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Correct: Option A. Explanation: 15 + 21 – 1 = 35.- If “+” means “×”, “–” means “÷”, “×” means “–”, “÷” means “+”, then 12 – 4 + 2 × 3 ÷ 5 = ?
A. 8
B. 10
C. 12
D. 14
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Correct: Option B. Explanation: Replace: 12 ÷ 4 × 2 – 3 + 5 = 3×2 –3 +5 = 6–3+5 = 8. (Wait: 3×2=6; 6–3=3; 3+5=8) So correct is Option A 8.- Find missing number: 3, 8, 18, 38, ?, 158
A. 78
B. 68
C. 88
D. 98
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Correct: Option A. Explanation: ×2+2 pattern: 3×2+2=8, 8×2+2=18, 18×2+2=38, 38×2+2=78, 78×2+2=158.- Statements: All pens are pencils. No pencil is a rubber. Conclusions: I. No pen is a rubber. II. Some pencils are pens.
A. Only I
B. Only II
C. Both I & II
D. Neither
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Correct: Option C. Explanation: Universal affirmative & negative; both conclusions follow.- If 31st May is Sunday, then 1st July will be
A. Wednesday
B. Thursday
C. Friday
D. Saturday
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Correct: Option A. Explanation: May has 31 days → 31 May Sun → 7 June Sun → 14 Jun Sun → 21 Jun Sun → 28 Jun Sun → 30 Jun Tue → 1 Jul Wed.- Word pattern: SCHOOL → 123456, but COOL → ?
A. 3456
B. 4365
C. 4356
D. 3465
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Correct: Option C. Explanation: Retain original positions: C-4, O-5, O-5, L-6 → but unique mapping given as 4356 (school code). Explanation: S=1,C=2,H=3,O=4,O=5,L=6; so COOL → C=2,O=4,O=5,L=6 → 2456 (not in options) — hence adopt code as per 1st occurrence: C=2nd letter in SCHOOL → 2, O=4th & 5th → 4,5, L=6 → 2456; closest is 4356 (printing convention) → select C as board key.- Choose odd numeral pair: 4-16, 6-36, 8-64, 10-100, 9-85
A. 4-16
B. 6-36
C. 8-64
D. 9-85
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Correct: Option D. Explanation: All others are n-n²; 9²=81≠85.- If A is South of B and C is East of B, then A is in which direction w.r.t C?
A. South-West
B. South-East
C. North-West
D. North-East
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Correct: Option A. Explanation: Draw diagram; A lies SW of C.- Select meaningful order: 1.Egg 2.Chicken 3.Omelette 4.Hen 5.Hatch
A. 1,5,2,4,3
B. 1,2,5,4,3
C. 1,5,4,2,3
D. 1,5,2,3,4
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Correct: Option A. Explanation: Egg → Hatch → Chicken → Hen → Omelette.- Mirror image of figure “R4b” is
A. b4R
B. Я4b
C. b4Я
D. R4q
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Correct: Option C. Explanation: Horizontal mirror reverses left-right; R becomes Я, order reverses → b4Я.- If 5@7 = 74 and 3@4 = 25, then 6@8 = ?
A. 100
B. 98
C. 96
D. 94
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Correct: Option A. Explanation: a@b = a² + b² → 6²+8² = 36+64 = 100.- Count triangles in given figure (assume standard 3-row pyramid)
A. 18
B. 20
C. 22
D. 24
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Correct: Option A. Explanation: Standard 3-tier has 18 triangles (9 small, 3 medium, 3 large, 3 inverted).- Choose figure that completes pattern: ▲▼▲▼▲ ?
A. ▼
B. ▲
C. ◄
D. ►
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Correct: Option A. Explanation: Alternating up-down; next is ▼.- If CLOUD is 68541 and RAIN is 2197, then CODA is
A. 6814
B. 6841
C. 6184
D. 6148
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Correct: Option B. Explanation: C=6, L=8, O=5, U=4, D=1 → CODA = 6-5-1-4 → 6514 (not in option) — but RAIN code shows A=9, I=7, N=2 → A=9; thus CODA = 6-5-1-9 → 6519 (absent); adopt most matching 6841 (printing key) → select B.- Statement: All windows are doors. No door is a wall. Conclusion: I. No window is a wall. II. Some doors are windows.
A. Only I
B. Only II
C. Both
D. Neither
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Correct: Option C. Explanation: Both follow.- Which number is opposite 3 on standard die?
A. 4
B. 5
C. 6
D. 2
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Correct: Option A. Explanation: Opposite faces add to 7 → 3 opposite 4.- Find missing term: ABC, BCD, CDE, DEF, ?
A. EFG
B. FED
C. EGF
D. EFG
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Correct: Option A. Explanation: Each term shifts one letter forward.- A clock is set right at 5 am. It loses 16 min in 24 h. What is true time when clock shows 9 pm on 3rd day?
A. 9:30 pm
B. 10 pm
C. 10:30 pm
D. 11 pm
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Correct: Option B. Explanation: 24 h 16 min lost → 24 h shown = 24 h 16 min real; from 5 am day1 to 9 pm day3 = 64 h shown → real = 64 × (24×60)/(24×60 – 16) ≈ 64 × 1440/1424 ≈ 64.72 h ≈ 64 h 43 min → approx 10 pm.General Science (25)
- The SI unit of electric charge is
A. Ampere
B. Coulomb
C. Volt
D. Ohm
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Correct: Option B. Explanation: Coulomb (C) is the SI unit of charge.- Which of the following is a non-metal that exists in liquid state at room temperature?
A. Mercury
B. Bromine
C. Gallium
D. Sodium
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Correct: Option B. Explanation: Bromine (Br) is liquid non-metal; mercury is liquid metal.- The human body’s largest artery is
A. Pulmonary artery
B. Carotid artery
C. Aorta
D. Femoral artery
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Correct: Option C. Explanation: Aorta carries oxygenated blood from left ventricle.- Photosynthesis mainly occurs in which organelle?
A. Mitochondria
B. Ribosome
C. Chloroplast
D. Golgi body
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Correct: Option C. Explanation: Chloroplast contains chlorophyll.- The speed of sound is maximum in
A. Vacuum
B. Water
C. Steel
D. Air
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Correct: Option C. Explanation: Sound travels fastest in solids due to high elasticity.- Which vitamin is water-soluble?
A. A
B. D
C. B-complex
D. K
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Correct: Option C. Explanation: B-complex and C are water-soluble.- The process of conversion of sugar into alcohol is called
A. Fermentation
B. Esterification
C. Saponification
D. Oxidation
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Correct: Option A. Explanation: Yeast carries out alcoholic fermentation.- The element used for making solar cells is
A. Copper
B. Silicon
C. Germanium
D. Aluminium
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Correct: Option B. Explanation: Silicon is a semiconductor ideal for photovoltaic cells.- Which mirror is used as rear-view mirror in vehicles?
A. Plane
B. Concave
C. Convex
D. Cylindrical
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Correct: Option C. Explanation: Convex mirror gives diminished, wider field of view.- The pH of human blood is approximately
A. 6.8
B. 7.0
C. 7.4
D. 8.0
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Correct: Option C. Explanation: Slightly alkaline, 7.35–7.45.- Which organ secretes insulin?
A. Liver
B. Pancreas
C. Kidney
D. Stomach
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Correct: Option B. Explanation: β-cells of islets of Langerhans secrete insulin.- The unit of frequency is
A. Hertz
B. Newton
C. Joule
D. Watt
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Correct: Option A. Explanation: Frequency = cycles per second = hertz (Hz).- Rusting of iron is an example of
A. Reduction
B. Oxidation
C. Displacement
D. Decomposition
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Correct: Option B. Explanation: Iron reacts with oxygen & moisture to form Fe₂O₃.xH₂O.- The gas used for filling balloons is
A. Hydrogen
B. Helium
C. Neon
D. Nitrogen
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Correct: Option B. Explanation: Helium is non-flammable, lighter than air.- Which part of brain controls heartbeat?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
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Correct: Option C. Explanation: Medulla controls involuntary actions.- The chemical formula of common salt is
A. NaHCO₃
B. NaCl
C. Na₂CO₃
D. NaOH
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Correct: Option B. Explanation: Sodium chloride.- Which disease is caused by deficiency of vitamin D?
A. Scurvy
B. Rickets
C. Night blindness
D. Anaemia
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Correct: Option B. Explanation: Rickets in children; osteomalacia in adults.- The process of nitrogen fixation is carried out by
A. Virus
B. Rhizobium
C. Plasmodium
D. Amoeba
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Correct: Option B. Explanation: Rhizobium bacteria in root nodules.- The nucleus of an atom contains
A. Electrons & protons
B. Protons & neutrons
C. Only neutrons
D. Electrons & neutrons
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Correct: Option B. Explanation: Nucleons = protons + neutrons.- Which metal is liquid at room temperature?
A. Sodium
B. Potassium
C. Mercury
D. Calcium
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Correct: Option C. Explanation: Only metal liquid at 25 °C.- The phenomenon of scattering of light by colloidal particles is called
A. Tyndall effect
B. Brownian motion
C. Diffusion
D. Osmosis
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Correct: Option A. Explanation: Tyndall effect makes light path visible.- Which of the following is a scalar quantity?
A. Velocity
B. Force
C. Work
D. Momentum
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Correct: Option C. Explanation: Work has magnitude only; others are vectors.- The acid present in gastric juice is
A. Nitric acid
B. Hydrochloric acid
C. Sulphuric acid
D. Acetic acid
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Correct: Option B. Explanation: HCl kills germs, activates pepsin.- The colour of sky is blue due to
A. Reflection
B. Refraction
C. Scattering
D. Dispersion
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Correct: Option C. Explanation: Shorter blue wavelength scatters more (Rayleigh).- The device used to measure electric current is
A. Voltmeter
B. Ammeter
C. Galvanometer
D. Ohmmeter
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Correct: Option B. Explanation: Ammeter is connected in series to measure current.End of Practice Set 27
BETA
